Primary Material Research Articles

Development of Environmentally Friendly and Economical Flood-Prevention Stones Based on the Sediments of the Yellow River.

The deposition of Yellow River sediment in the middle and lower reaches is a significant factor in the siltation of reservoirs and the occurrence of serious flooding along the river. The efficient and valuable utilization of Yellow River sediment has already become a key research topic in this field. In this study, we have employed Yellow River sediment as the primary material, in conjunction with commercially available slag, fly ash, and quicklime as the binder, to develop a novel type of artificial flood-prevention stone. Following a 28-day standard curing procedure, the highest compressive strength of the prepared artificial stone was recorded at 4.29 MPa, with a value exceeding 0.7 MPa under wet conditions. The results demonstrated that the prepared artificial stone met the specifications for artificial flood-prevention stones. The curing mechanism, as evidenced by analyses from SEM and XRD testing, indicated that the alkali excitation process in the binder, which produced C-A-S-H gel, was the key factor in enhancing the compressive strength of the specimens. Notably, an evaluation of the amount of CO2 emissions and the cost of the artificial stone concluded that the preparation process was both environmentally friendly and cost-effective.

Experimental study on bearing capacity performance of glued bamboo-wood bolted joints

The paper presented an experimental investigation of glued bamboo-timber bolted joints to study the influence of bolt grade, bolt diameter, and material type on the load-bearing capacity of bolted joints. The results showed that the failure mode of glued bamboo-timber bolted joints was characterized by compression deformation of the bolt holes, with a plastic hinge failure occurring at each shear plane. Additionally, the failure of the specimens involved the failure of both the primary material and the adjacent substrate at the edge of the joint. As the diameter of the bolts increased, the load-bearing capacity of the specimens also increased. The increase in maximum load from a bolt diameter of 10 mm to 12 mm was 13.78 %, while the increase in maximum load from a bolt diameter of 12 mm to 14 mm was 42.29 %. Enhancing the bolt grade increased the load-bearing capacity of the specimens. The increase could be 10.32 % under the circumstance of WBW (wood on the outer layer and bamboo on the inner layer) combination while 8.4 % when it was BWB (bamboo on the outer layer and wood on the inner layer) combination. Moreover, when the material type was changed into BWB, the increase in load-bearing capacity was 55.33 % and 32.84 % when the diameter varies. The load-bearing capacity of the BWB material was higher than that of the WBW material. After comparing the existing methods of calculating bolt load carrying capacity, optimizations were made to the calculation formulas in Eurocode 5. The modified formula provided more accurate predictions of the load-bearing capacity of glued bamboo-timber bolted joints.

The Urgency of Using al-Milk an-Naqiṣ in Geographical Indications: An Ideal Preservation for Intellectual Property in Indonesia

This study aimed at explaining the ideal preservation of intellectual property inventions so that geographical indications (GI) products can increase and be highly competitive in the global market. The existence of GI play a vital role in supporting business competition at the national and international trade levels. GI not only provide protection for intellectual property inventions, but also provide legal guarantees of official legality from the government. This study used a conceptual and comparative approach supported by primary legal materials consisting of GI laws combined with texts and fiqh. The research results shows that al-milk an-naqiṣ’s efforts with the al-ibahah type will be an ideal model for preserving GI for intellectual property inventions in Indonesia in the future. This is because al-milk an-naqiṣ, which is varied and implemented in the community, is able to strengthen GI inventions, can last longer, and without any contracts. In addition, there are advantages to be gained by using al-milk an-naqiṣ, such as having different ownership models, no time limit for transferring ownership, and the ability to increase the welfare of the community. For this reason, it is necessary to spread the importance of preserving the al-milk an-naqiṣ model in order to form a legal culture and provide legal protection for intellectual property inventions based on GI so that they will last longer in the market in the future. In addition, this is useful to support the increase of regional per capita income and help reduce unemployment through the implementation of al-milk an-naqiṣ GI products as an ideal solution for the long-term preservation of intellectual property inventions.

Primary Materials for the Flora of the Slopes of the Chonkatau Ridge

Primary Materials for the Flora of the Slopes of the Chonkatau Ridge

Evaluating the vulnerability of forestry supply chains through fuzzy cognitive map

Recognizing the significant role of the supply chain in economic activity, it is crucial to address its vulnerability areas. This research focuses on the forestry industry, where obtaining and maintaining the primary raw material source is notably more challenging compared to other supply chains. The primary objective of this study is to analyze vulnerability factors specific to the forestry supply chain (FSC) by modeling their interactions and potential influences on each other. Initially, relevant factors were identified through a comprehensive literature review, encompassing vulnerabilities both general supply chain and pertinent to forestry industry such as natural disruptions. Then, using fuzzy cognitive map (FCM), the relationships between these factors were modeled and simulated. An influence map was constructed based on expert opinions, facilitated by triangular fuzzy numbers to express expert judgments accurately. FCM simulations were conducted to analyze the effects of vulnerability factors of FSC on one another across three sustainability-themed scenarios: economically related vulnerabilities, socially related vulnerabilities, and environmentally related vulnerabilities. This research is significant for stakeholders in the forestry industry as it elucidates the vulnerability factors within the forestry supply chain and demonstrates how different vulnerabilities can influence one another.

A comprehensive techno-eco-environmental investigation of an efficient biodiesel generation procedure through hydrodynamic cavitation

The growth of cleaner biodiesel generation associated with hydrodynamic cavitation from canola oil via transesterification is acquiring prominence owing to considerably descending energy needs and time. In this work, the conversion of canola oil into biodiesel and glycerol was achieved through the process of transesterification with methanol, employing sodium hydroxide as a catalyst. The newly offered process was investigated from technical, economic, and environmental points of view, and the precision of the results was verified and accepted compared to previously published works. The technical results revealed that the maximum exergy destruction rates as well as exergy efficiency belonged to the transesterification process. The economic study showed that the capital cost of the process was 638.7 MUSD/year. Also, the return period was computed less than 4 years. Moreover, comparison analysis proved that Canola oil proved to be a more advantageous primary material for the production of biodiesel and was more appropriate from the exergoeconomic point of view in comparison to Jatropha oil and other materials. Finally, by increasing the conversion percentage of the reactor, the value of the exergo-environmental index and the factor of exergy stability increased significantly, which was considered as an advantage from an environmental standpoint.

The implementation of state's rights and obligations in outer space: is it equal?

The provisions of Outer Space Law govern a state's activities in outer space. The implementation of such activities needs advanced technology, which limits the ability of many countries to explore and exploit outer space. Data indicates that developed nations dominate outer space management, leaving countries without access to sophisticated technology unable to participate fully in space exploration and exploitation. This dominance triggers disparity between developed and developing countries, leading to unequal application of rights and obligations as outlined in Outer Space Law. While the law promotes international collaboration to address this issue, it does not explicitly require developed countries to involve developing nations in outer space activities. This study aims to refine the concept of international collaboration to ensure fair management and exploitation of outer space by all countries. This study is normative in nature, focusing on evolving the concept of international collaboration in outer space. Primary and secondary legal materials and non-legal sources were used as secondary data collected through a literature review and analysed qualitatively. The developed concept emphasises international cooperation and mutual assistance, proposing a framework for collaboration between developed and developing countries. This concept seeks to ensure equitable management of outer space. It reshapes the rights and obligations of states by encouraging all launching states to involve developing countries in space exploration and exploitation.

Enhanced Hybrid Nanogenerator Based on PVDF-HFP and PAN/BTO Coaxially Structured Electrospun Nanofiber.

Nanogenerators have garnered significant interest as environmentally friendly and potential energy-harvesting systems. Nanogenerators can be broadly classified into piezo-, tribo-, and hybrid nanogenerators. The hybrid nanogenerator used in this experiment is a nanogenerator that uses both piezo and tribo effects. These hybrid nanogenerators have the potential to be used in wearable electronics, health monitoring, IoT devices, and more. In addition, the versatility of the material application in electrospinning makes it an ideal complement to hybrid nanogenerators. However, despite their potential, several experimental variables, biocompatibility, and harvesting efficiency require improvement in the research field. In particular, maximizing the output voltage of the fibers is a significant challenge. Based on this premise, this study aims to characterize hybrid nanogenerators (HNGs) with varied structures and material combinations, with a focus on identifying HNGs that exhibit superior piezoelectric- and triboelectric-induced voltage. In this study, several HNGs based on coaxial structures were fabricated via electrospinning. PVDF-HFP and PAN, known for their remarkable electrospinning properties, were used as the primary materials. Six combinations of these two materials were fabricated and categorized into homo and hetero groups based on their composition. The output voltage of the hetero group surpassed that of the homo group, primarily because of the triboelectric-induced voltage. Specifically, the overall output voltage of the hetero group was higher. In addition, the combination group with the most favorable voltage characteristics combined PVDF-HFP@PAN(BTO) and PAN hollow, boasting an output voltage of approximately 3.5 V.

Long-Term One-Dimensional Compression Tests and Fractional Creep Model of Compacted Snow

Compacted snow is a primary construction material in polar regions and experiences persistent deformation during loading, which considerably affects the safety of snow structures. This study conducts a series of one-dimensional compression tests to investigate the effect of initial densities and stress levels on the long-term deformation of compacted snow samples over 90 days. The compression curve of compacted snow can be divided into three stages: instantaneous, primary, and secondary compressions. Instantaneous compression occurs at pressurization; primary compression occurs within 10 to 40 min of loading; secondary compression occurs when snow remains unstable for 90 days. Secondary compression is the main cause of long-term deformation of the samples and the secondary compression coefficient tends to decrease with a higher initial density and lower normal pressure. A fractional creep model is developed to describe the experimental data and a good agreement was obtained. The proposed model adopts the fractional deviation approach to modify the classic Burgers model, and the density-dependent parameters are calibrated using the experimental data. The proposed model is verified as a useful tool in describing the creep behavior of snow, and the results of this study contribute to the safe operation of building structures on snow foundations.

Reconstruction of Law Enforcement Rule for Employers of Medical Practitioner without Practice Licenses Based on Restorative Justice

In Indonesia, current constructive law lacks clear regulation regarding the enforcement of laws against employers who hire medical practitioner without practice licenses. As a result, law enforcement often relies on general statutes such as the Penal Code or Civil Code, treating offenders similarly to criminals. This situation emphasizes the urgent need for specific rule that adhere to principles of restorative justice. This study aims to study the absences in current law enforcement rule pertaining to employers of unlicensed medical practitioner, explore these issues from a restorative justice perspective, and propose a reconstructed regulatory framework grounded in restorative justice principles. The research employs a constructivist paradigm with a descriptive-analytical approach, utilizing socio-legal methods within a qualitative research design. Data consist of primary, secondary, and tertiary legal materials gathered through literature review, observation, and interviews, and are studied qualitatively. The findings reveal that existing rule do not follow to principles of restorative justice. Enforcement lacks consistency, hindering the equitable access of the public to law enforcement, justice, and benefits. Weaknesses include the absence of specific legal provisions and insufficient knowledge among law enforcement officials regarding healthcare law, resulting in inconsistent enforcement practices. Illustration on international and national legal insights, the study proposes a reconstructed legal framework that ensures balanced protection for employers, medical practitioner, and patients, promoting dignified and high-quality healthcare services free from stigma, and showed with fairness and professionalism. Reconstructing legal norms such as Article 442 and healthcare legislation could create a balanced law enforcement regulation that upholds legal enforcement, legal utility, and societal justice perceptions.

Imposing Corporate Death Penalty in Indonesia: A Discourse on Penalisation, Corporate Culture, and Deferred Prosecution Agreement

The Indonesian Penal Code 2023 regulates corporate criminal liability. It covers various issues, including the actions of a corporation that amount to corporate crimes, the conditions under which a corporation can be held criminally responsible, who can be held accountable, and the types of criminal sanctions imposed on corporations. The primary criminal sanction is the imposition of fines. However, several types of additional punishments may also be imposed, including dissolution of the corporation or, in other words, the “corporate death penalty”, which leads to a permanent termination of the corporation's operations, loss of jobs for employees, termination of production, and stoppage of tax payments to the government. Thus, if imposed without caution, corporate death penalty will negatively impact the state and society. This article analyses the effect of corporate death penalty on the society and highlights the need for judges to exercise caution before dissolving a corporation. The study applies normative legal research with the statutory and comparative approach. Primary and secondary legal materials were analysed. This article argues against the imposition of corporate death penalty in Indonesia for three reasons. First, Indonesia does not have sentencing guidelines for corporations. Second, Indonesia has not developed a Deferred Prosecution Agreement (DPA) mechanism yet, which is an obstacle to developing a better corporate culture. Third, corporate death penalty has harmful impacts on a country's economy and public welfare; among others, it increases the unemployment rate, which impacts social life.

Ecological Innovations in Hotel Companies: A Case Study of Poland

Entrepreneurship is one of the key pillars of the modern market economy. The most important attributes of entrepreneurship include innovation. According to many economists, most of the economic growth of developed countries should now be linked to the application and implementation of innovation. Among many types of innovations, ecological innovations (eco-innovations) deserve special attention. Ecological innovations contribute to the reduction of operating costs, increase in competitive advantage and facilitate entry into new markets. At the same time, they have a positive impact on the natural environment. The examples of eco-innovations are also increasingly often found in hotel companies. The aim of the publication is to discuss the current examples of the most significant ecological innovations in hotel enterprises. The article considers the significant impact of ecological innovations on the activities of this type of enterprises. In order to achieve the objectives of the publication, the Polish hotel market was taken into account. The article presents the following research thesis: Environmental innovations are an increasingly important element influencing the operation of hotel enterprises in Poland. However, there is still little awareness of them among guests. The article was written on the basis of books studies, monographs, magazines and netographic information. Methodology of research carried out for the needs of the work. To identify and analyze ecological innovations in hotels in Poland, as well as for the purposes of achieving the goals of the work, two methods of collecting primary research material were used. The first one is based on the analysis of existing data, including the analysis of guest opinions on the booking portal and literary criticism. The second one consisted of a diagnostic survey in which a non-standardized interview was used as a research technique on a deliberately selected group of hotel owners and managers from all over Poland, who have decided to introduce ecological innovations on the premises of their facilities. Interviews were conducted in January-February 2024. The interview did not take into account objects that temporarily suspended their activity. The results of the research positively verify theses.

An Analysis of the Theory of Justice against the Standard of Proof Beyond Reasonable Doubt in the Judge's Decision in the Jessica Kumala Wongso Case

This research aims to find out the theory of justice that can be used by judges in proving criminal cases in Indonesia and the use of the theory of justice in the standard of proof beyond reasonable doubt in the judge's decision in the Jessica Kumala Wongso case. This research uses normative legal research methods with legal philosophy, legislation and conceptual approaches. The data source used is secondary data consisting of primary legal materials and secondary legal materials analyzed qualitatively with deductive inference, starting with general principles and concepts about the theory of justice and the standard of proof beyond reasonable doubt, the analysis moves towards specific propositions to determine the value of justice and the relevance of this standard in the judge's decision in the Jessica Kumala Wongso case. The study found that Gustav Radbruch's theory of justice can be applied by judges in Indonesian criminal cases, using six evidentiary parameters: theory of evidence, minimum evidence, evidence, presentation of evidence, burden of proof, and strength of proof. These parameters reflect Radbruch's legal values of justice, purpose, and legal certainty. Judges using Radbruch's theory prioritize justice, followed by purpose and legal certainty. In Jessica's case, despite doubts about the evidence, the judges found her guilty beyond a reasonable doubt, aligning with Radbruch's principle that justice should take precedence in the standard of proof.

Anti-Corruption Efforts in Regional Police Departments: The Role of Regional Inspectorate Supervision Based on Justice Values

This study explores how effective oversight can enhance the utilization of state apparatus for achieving good and clean governance, specifically focusing on the role of regional inspectorates in preventing corruption within regional police departments. The study aims to: 1) analyze why current regulations regarding the regional inspectorate's role in corruption prevention are not based on justice values; 2) identify challenges in these regulations; and 3) propose a reconstruction of the regulations to align with justice values. Using a constructivist paradigm, a socio-legal approach, and descriptive research methods, the study relies on secondary data sources, including primary, secondary, and tertiary legal materials. Data collection is conducted through a literature review, and qualitative analysis is employed for data interpretation. The findings reveal that the current regulation is not justice-aligned due to the supervisory function of the Regional Inspectorate (Itwasda) being under the authority of the Regional Police Chief (Kapolda), rather than the National Police Chief (Kapolri). This structure limits the effectiveness of oversight and suggests the need for a direct reporting line to National Police Chief. Challenges in the existing framework include a lack of specific legal guidelines governing the inspectorate's role in corruption prevention and insufficient synergy between organizational sections and Supervision Inspectorate. Furthermore, there is a cultural reluctance to report corruption. The study proposes reconstructing the regulation to ensure a justice-based framework, including normative revisions to relevant laws and regulations, such as Law No. 20 of 2001 on the Amendment of Law No. 31 of 1999 on Corruption Eradication, and Indonesian National Police Regulation No. 14 of 2018. This reconstruction aims to establish a clearer, more effective oversight mechanism that enhances the inspectorate's role in corruption prevention.

Reconstruction of Legislative Members' Term Rules Based on the Principle of Justice

The presence of the House of Representatives in Indonesia's constitutional system significantly supports the development of democracy, as they serve as the people's representatives and voice. Currently, it is essential to implement term restrictions for legislative members, primarily for societal benefit. This study addresses the following research problems: Why is the current rule of legislative members' terms not just? What are the weaknesses of the current legislative term rules? How should the rule of legislative members' terms be reconstructed based on the principle of justice? Employing a constructivism paradigm, this research uses a sociological juridical approach and a descriptive research type. Data sources include primary data from field research and secondary data from primary, secondary, and tertiary legal materials. Data collection methods encompass observation, interviews, and literature study, with qualitative data analysis. The findings indicate that the current rule of legislative members' terms is unjust due to the lack of term restrictions, leading to increased risks of corruption, bribery, collusion, and nepotism. Weaknesses in existing rules on criminal sanctions for corruption, bribery are evident in the legal substance, structure, and culture. The legal substance lacks clear provisions on term restrictions, and the legal structure fails to address the urgency of implementing term restrictions for House of Representatives of Indonesia’s and Regional Representative Council members. Additionally, there is a need to raise public awareness about the importance of term restrictions for legislative members. The study suggests reconstructing criminal sanctions rules against corruption, bribery based on justice values, which involves revising both values and norms. This includes transforming previously unjust rules into just ones and amending the legislative term rules according to the principle of justice, as outlined in Law No. 7 on 2017 concerning General Elections, Articles 240(1) and 248.

Systematic Review of Construction Waste Management Scenarios: Informing Life Cycle Sustainability Analysis

Abstract Purpose Construction and demolition waste (CDW) is increasing due to rapid urbanization. An estimated 35% of CDW is disposed of in landfills worldwide. Thus all available strategies for minimizing the environmental and economic impacts of CDW are explored. This study reviews the use of recycled construction and demolition waste as substitutes for primary materials as well as strategies for the reuse of materials that lead to the circular economy. The aim of this study is to analyse previous literature on CDW that use life cycle analysis and contribute to the circular economy. Methodology A bibliometric analysis and systematic critical review is presented to investigate the contribution of construction materials to life cycle sustainability assessment (LCSA). The Scopus database was the main source of data reviewed. The geographical distribution, main research sources, and keywords co-occurrence were analyzed for 69 peer-reviewed articles and conference papers. Findings Most studies compared the life cycle assessment (LCA) and life cycle cost (LCC) of alternative concrete recycling methods or using waste instead of aggregates in concrete. Recycling or reuse of concrete, bricks, wood, gypsum, and steel are the most common materials studied in previous research. A knowledge gap is proposed for future research. Originality The knowledge gaps identified focus on wood waste and concrete. Currently it is not clear which of the options proposed is the most sustainable.

Kamlet-Taft parameters of solvents and their relationship with methylation of hydroxy group by Ag2O

We measured the effects of Kamlet-Taft parameters on methylation of hydroxy group of N-(2-hydroxyethyl) phthalimide by Ag2O. Optimization of methylation was done by tuning the solvents, mixtures of solvents, temperature, and concentrations of primary materials (methyl iodide, methyl-d3 iodide, Ag2O). Solvents had the most effective roles on methylation by Ag2O. Although methylation did not work in polar solvents such as DMF and acetonitrile, it was successful in non-polar solvents (n-heptane, n-hexane, n-pentane, and cyclohexane). Despite using hydrocarbons was favoured for methylation, adding chloroform as a co-solvent significantly improved the yield of the reaction while using less amount of Ag2O. Kamlet-Taft parameters showed the polarizability of the solvent was the most important parameter which controlled the methylation by Ag2O.As a minor goal, subsequently, this reaction was followed by hydrolysis of N-(deuterated 2-methoxyethyl) phthalimide to prepare deuterated 2-methoxyethylamine and the target urea derivative, MTU: N-{2-[(D3) methyloxy] ethyl}-N’-1,2,3-thiadiazol-5-ylurea. Deuterium-labelled MTU will be used for isotope tracing in plant cells to shed more light on MTU localization and mode of action in plants. NMR, UV–vis, IR spectroscopies, and mass spectrometry were used to confirm the structures.

A high‐temperature resistant benzimidazole‐based porous polymer for efficient adsorption of trinitrotoluene in aqueous solution

AbstractA novel benzimidazole‐based porous polymer, denoted as PTBI, was synthesized utilizing self‐synthesized 1,3,5‐tris(1H‐benzo[d]imidazol‐2‐yl)benzene (TBI) and 4,4′‐difluorobenzophenone as primary materials via a CN coupling reaction, followed by a freeze‐drying process. PTBI displayed commendable thermal stability, as evidenced by a temperature of 475°C at which a 5% weight loss occurred and a char yield of up to 65% at 800°C. Trinitrotoluene (TNT) was effectively adsorbed by PTBI in aqueous solutions, thanks to the combined effects of three π–π interactions and one dipole–π interaction. At 25°C, PTBI achieved a maximum adsorption capacity as high as 280.8 mg/g, with approximately 60% of this capacity attained within just 1 h. Furthermore, a thermodynamic analysis showed that the adsorption of TNT by PTBI was a spontaneous, exothermic process that was followed by a decrease in entropy. It is noteworthy that following five adsorption and desorption cycles, the adsorption efficiency held steady at a relatively high level using acetone as the eluent. These promising results underscore PTBI's significant potential in the realm of TNT wastewater treatment, positioning it as a compelling candidate for further research and application under extreme condition in this field.

Soils in Understanding Land Surface Construction: An Example from Campania Plain, Southern Italy

The contribution of sediment transport and accumulation to soil formation was investigated in an area characterized by continental sedimentary activity since the Late Pleistocene. The area was the north-eastern portion of the large Quaternary graben represented by the Campania Plain, which is rimmed to the north–east–south by the Mesozoic carbonate Apennine nappes. The plain was filled mainly by products generated by eruptions from the Phlegrean Fields, which were also distributed on the slopes bordering the plain and remobilized toward the adjacent surfaces. Five sites were selected in the area in question. They were studied using morphological features and pertinent characteristics of the mineral soil fraction >2.0 mm, such as their volume and lithological description. Soils were compared to selected lithostratigraphic sequences characterizing the studied area, which were collected from literature and reinterpreted in pedological keys. The results showed that soils derived from the emplacement of Phlegrean primary volcanic materials, such as Campania Ignimbrite (~39–40 ky B.P.) and Neapolitan Yellow Tuff (~15 ky B.P.), with the related weathering products, and from volcanic materials reworked and transported by alluvial/colluvial episodes. The latter formed contrasting soil horizons which, differing in both rock fragment content and lithological composition, testified to the presence of lithological discontinuities. The formation of the horizons in question interrupted the genetic sequence derived from the in situ alteration of the volcanic substrata, suggesting that processes of transport and redistribution of sediments from the adjacent mountain slopes contributed to soil formation. The comparison of the pedostratigraphies with the lithostratigraphic sequences indicated a strong relation between geomorphic and pedogenetic events.

A new electrolyte for molten carbonate decarbonization

The molten Li2CO3 transformation of CO2 to oxygen and graphene nanocarbons (GNCs), such as carbon nanotubes, is a large scale process of CO2 removal to mitigate climate change. Sustainability benefits include the stability and storage of the products, and the GNC product value is an incentive for carbon removal. However, high Li2CO3 cost and its competitive use as the primary raw material for EV batteries are obstacles. Common alternative alkali or alkali earth carbonates are ineffective substitutes due to impure GNC products or high energy limitations. A new decarbonization chemistry utilizing a majority of SrCO3 is investigated. SrCO3 is much more abundant, and an order of magnitude less expensive, than Li2CO3. The equivalent affinities of SrCO3 and Li2CO3 for absorbing and releasing CO2 are demonstrated to be comparable, and are unlike all the other alkali and alkali earth carbonates. The temperature domain in which the CO2 transformation to GNCs can be effective is <800 °C. Although the solidus temperature of SrCO3 is 1494 °C, it is remarkably soluble in Li2CO3 at temperatures less than 800 °C, and the electrolysis energy is low. High purity CNTs are synthesized from CO2 respectively in SrCO3 based electrolytes containing 30% or less Li2CO3.