Phosphomolybdic Acid Research Articles

Hydrolysis-oxidation of cellulose to formic acid in the presence of micellar vanadium-containing molybdophosphoric heteropoly acids

OxFA-processing of inedible cellulose is considered as a perspective way for the production of biogenic formic acid (FA) which appeared to be a promising source for sustainable energy. In our work, the one-pot hydrolysis-oxidation of cellulose to FA was studied in the presence of the micellar acidic catalysts based on Mo–V–P heteropoly acids [Cn-MIM]y/H3+x-yPMo12-xVx (n = 6, 10 and 16; x = 1, 2 and 4; y = 2–6). The influence of amount of V, substitution of H+ by [Cn-MIM] and the length of alkyl group Cn of the cation was revealed. The optimization of the reaction conditions was also performed. To our knowledge, heterogeneous catalysts of such a composition were applied in cellulose hydrolysis-oxidation to FA for the first time. In the presence of C10-MIM/HPMo11V catalyst, the optimal reaction conditions were determined: 10 g/L of cellulose, 1.25–10 g/L of catalyst, 5 MPa of gas mixture (O2/N2 - 20/80 vol/vol) and 170–180 °C. Decreasing the alkyl group length of Cn-MIM+ cation or V content into framework of heteropoly anion were revealed to rise up the yield of the target product. These correlations were caused by the following factors. First, the decreasing acidity of micellar catalysts. Senond, the change in distribution of electron density in heteropoly anion due to the interaction between hydrogen atoms of alkyl group of Cn-MIM cation and oxygen atom of heteropoly anion. Third, blocking of V active sites for reagents. Influence of acidity on catalytic properties of micellar catalysts was also revealed in the course of screening samples with the different degree of protons substitution by C16-MIM+. The reaction rate was demonstrated to rise with increasing degree of protons substitution by C16-MIM + cation in C16-MIM/HyPMo11V and C16-MIM/HyPMo8V4 samples. The yield of FA up to 45 mol% can be reached over micellar HPA catalysts studied.

Composition-adjustable Mo6Co6C2/Co@carbon nanocage for enhanced oxygen reduction and evolution reactions

Bifunctional oxygen electrocatalysts that hold outstanding activity and stability are highly crucial for the development of efficient rechargeable Zn-air batteries. Herein, cobalt-molybdenum-based bimetallic carbide and cobalt nanoparticles embedded N-doped carbon nanocages are synthesized via the pyrolysis of functionalized zeolitic imidazolate framework precursor originated from zeolitic imidazolate framework sequentially coated with polydopamine and phosphomolybdic acid. Furthermore, we revealed the composition-performance relationship based on the exploration of bifunctional performance on the pyrolysis products. More importantly, the synergy of multiple active sites with hollow structure gives the prepared catalyst a low overpotential (284 mV) for oxygen evolution reaction and high half-wave potential (0.865 V) for oxygen reduction reaction, besides an excellent bifunctional durability. Furthermore, the prepared catalyst as a cathode electrocatalyst grants the assembled rechargeable Zn-air batteries a high open-circuit voltage, power density, specific capacity, and remarkable charge-discharge cycle stability. This work provides a strategy for the integration and active-adjustment of bifunctional catalyst and its potential applications in water splitting and other catalytic reactions.

A confined MoN2@N-rich carbon catalyst derived from β-cyclodextrin encapsulating phosphomolybdic acid for oxidative removal of H2S

The efficient removal of H2S is significant to the chemical industry and environmental protection. In this study, a macrocycle-confinement pyrolysis strategy was explored to synthesize a confined MoN2@N-rich porous carbon (MoN2@NPC) catalyst using β-cyclodextrin encapsulating phosphomolybdic acid (PMo12 ⊂ β-CD) as a Mo precursor to improve the desulfurization activity of carbonaceous catalysts for the efficient conversion of H2S to sulfur. The decomposition of PMo12 ⊂ β-CD not only generated well distributed MoN2 sites, but also enriched pore structures due to the pore-forming ability of β-CD. MoN2@NPC possessed a high breakthrough capacity of 173.9 mg/g at room temperature and excellent durability (>100 h) at 200 °C toward continuous H2S selective oxidation. Furthermore, MoN2@NPC showed a remarkable superiority to common catalysts (PC, NPC, and MoN2-NPC), revealing the effectiveness of the macrocycle-confinement pyrolysis strategy for strengthening desulfurization activity. The excellent desulfurization ability of MoN2@NPC was attributed to the synergetic effect of uniform MoN2 sites and N species (pyridinic N and pyrrolic N). Additionally, the formed water film and activated O2 on MoN2@NPC further induced H2S dissociation and oxidation. This work provides a key insight into the behavior of H2S oxidative removal over NPC-based catalysts and offers a promising route to construct non-precious catalysts with high desulfurization activity.

Phosphomolybdic acid hydrate encapsulated in MIL-53 (Fe): a novel heterogeneous heteropoly acid catalyst for ultrasound-assisted regioselective nitration of phenols.

In this study, a heterogeneous catalyst, PMA@MIL-53 (Fe) (MIL ⇒ Matériaux de l'Institut Lavoisier), has been used to replace the usual mineral acids such as sulfuric acid. A wide variety of nitration methods require the use of a mixture of acids such as concentrated nitric acid and sulfuric acid, which result in producing a large amount of acidic waste. During recent years, the use of the heterogeneous system for the nitration of aromatic compounds has been highly considered and used by chemists due to some specific advantages, i.e. easy separation of the product from the reaction mixture, the possibility of recycling and reusing the catalyst, etc. Herein, the catalyst was synthesized using a metal-organic framework and a heteropoly phosphomolybdic acid. The PMA@MIL-53 (Fe) was prepared using a similar method of MIL-53 (Fe) synthesis. Afterwards, FeCl3·6H2O and 1,4-benzene dicarboxylic acid (BDC) in a dimethylformamide solution were placed in an ultrasound bath and, then, HPA (heteropoly acid) was added to the reaction mixture. The PMA (phosphomolybdic acid) encapsulation in MIL-53 (Fe) was confirmed using various analysis. Under optimal conditions, the catalytic activity of PMA@MIL-53 (Fe) was evaluated in nitration of phenol under ultrasonic waves. Besides, the ratio of the two products of ortho and para was obtained using GC. Optimum conditions were reached after 15 minutes, in such a way that the loaded PMA was 0.02 g under optimal conditions, the efficiencies of ortho-nitrophenol and para nitrophenol were 54.98 and 45.01, respectively.

A dual-mode system based on molybdophosphoric heteropoly acid and fluorescent microspheres for the reliable and ultrasensitive detection of alkaline phosphatase.

A novel colorimetric and fluorescent dual-mode sensing system based on molybdophosphoric heteropoly acid (PMA) and fluorescent microspheres (FMs) was established for monitoring the activity of alkaline phosphatase (ALP). In the presence of ALP, L-ascorbic acid-2-phosphate (AAP) could be hydrolyzed catalytically to ascorbic acid (AA), which could reduce PMA to phosphorus molybdenum blue (PMB), accompanied by the generation of colorimetric signals depending on the level of ALP. Meanwhile, the fluorescence of FMs was quenched markedly by the PMB produced due to the inner-filter effect, which constituted the response mechanism for the dual-mode sensing systems of ALP. On this basis, a PMA-FMs based dual-mode sensing system was used for the detection of ALP, which not only possessed remarkable sensitivity, with a limit of detection of 0.27 U L-1 and 0.11 U L-1, but also exhibited good analytical performance in biological samples with satisfactory results. Moreover, a simple and portable test kit for the visual detection of ALP in real serum samples was fabricated utilizing a smartphone with image-recognition and data-processing capabilities as a visual-detection platform.

Utilisation and valorisation of distillery whisky waste streams via biomass electrolysis: electrosynthesis of hydrogen.

Fuel-flexible hydrogen generation methods, such as electrochemical conversion of biomass, offer a route for sustainable production of hydrogen whilst valorising feedstocks that are often overlooked as waste products. This work explores the potential of a novel, two-stage electrolysis process to convert biomass-containing solid (draff/spent barley) and liquid (pot ale and spent lees) whisky co-products, from the Isle of Raasay Distillery, into hydrogen, using a phosphomolybdic acid (H3[PMo12O40] or PMA) catalyst. Characterisation results for whisky distillery co-products will be presented, including thermogravimetric, differential scanning calorimetric, CHN elemental, total organic carbon and chemical oxygen demand analysis data. The results indicated that the characteristics of these co-products align well with those reported across the Scotch whisky distillation sector. Subsequently, the concept of thermal digestion of each co-product type, using the Keggin-type polyoxometalate PMA catalyst to abstract protons and electrons from biomass, will be outlined. UV-visible spectrophotometry was employed to assess the extent of reduction of the catalyst, after digestion of each co-product, and indicated that draff and pot ale offer the largest scope for hydrogen production, whilst digestion and electrolysis of spent lees is not viable due to the low biomass content of this distillation co-product. Finally, details of electrolysis of the PMA-biomass solutions using a proton-exchange membrane electrolysis cell (PEMEC) will be provided, including electrochemical data that help to elucidate the performance-limiting processes of the PEMEC operating on digested biomass-PMA anolytes.

Phosphorus doped molybdenum disulfide regulated by sodium chloride for advanced supercapacitor electrodes.

As a pseudocapacitor electrode material, molybdenum disulfide (MoS2) usually shows inferior capacity, rate capability and cyclability. Structural regulation and heteroatom doping are the available methods to ameliorate the electrochemical properties of MoS2. Herein, phosphorus doped molybdenum disulfide regulated by sodium chloride (SP-MoS2) is successfully synthesized using phosphomolybdate acid as a molybdenum source and an in situ dopant and sodium chloride (NaCl) as a structural regulator. Under the structural regulation of NaCl, the SP-MoS2 nanosheets exhibit an interweaved architecture with a large interlayer spacing of 0.68 nm. Owing to the in situ P doping and large specific surface area (21.0 m2 g-1), the SP-MoS2 electrode possesses a maximum capacity of 564.8 F g-1 at 1 A g-1 and retains 56.3% of the original capacity at 20 A g-1. Density functional theory (DFT) calculations indicate that SP-MoS2 displays a high K+ average adsorption energy of -3.636 eV. In addition, the fabricated SP-MoS2//AC asymmetric supercapacitor device displays an energy density of 22.8 W h kg-1 at 759 W kg-1.

Preparation and isolation of mono-Nb substituted Keggin-type phosphomolybdic acid and its application as an oxidation catalyst for isobutylaldehyde and Wacker-type oxidation

Keggin-type mono-Nb substituted phosphomolybdic acid, H4PMo11NbO40, was prepared in a pure form.

Perovskite light-emitting diodes with solution-processed MoO3 films as the hole-transport layers

The poly(3,4-ethylene-dioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) is widely utilized as hole-transporting layers (HTLs) in perovskite light-emitting diodes (PeLEDs). However, the acidic and hygroscopic nature of PEDOT:PSS restricts its practical applications. Herein, we replace PEDOT:PSS with MoO3 as HTLs to achieve high-performance PeLEDs. The MoO3 HTLs were fabricated from the solution of phosphomolybdic acid in acetonitrile by solution-processing spin-coating technology. Smooth and uniform MoO3 HTLs could be obtained by carefully adjusting solution concentration and O2 plasma treatment time. Then, the MoO3 based device achieves a maximum external quantum efficiency of 3.8%, identical to the PEDOT:PSS based device. Moreover, the PeLEDs with MoO3 as the HTLs render better shelf stability than the PEDOT:PSS counterpart. We believe the solution-processed MoO3 films can provide a better alternative for the HTLs in PeLEDs by virtue of their simple and ecofriendly preparations.

Facile engineering of PES ultrafiltration membranes using polyoxometalates for enhanced filtration and antifouling performance

The pursuit of augmented membrane separation performance is mainly proceeded by breaking the permeability-selectivity trade-off and ameliorating the membrane fouling propensity. Here, we report the usage of phosphomolybdic acid (PMo12) as a functional additive to fabricate poly (ether sulfone) (PES) based composite ultrafiltration membranes via a non-solvent induced phase separation process. In contrast to the control PES membrane, the introduction of PMo12 endowed the composite membranes with increased surface pore density, porosity and selective layer thickness as well as the enhanced hydrophilicity and charge property through altering the phase inversion rate, thereby resulting in a significantly increased filtration performance. Specifically, the optimized composite membrane presented a water flux of 572.67 ± 21.73 L·m−2·h−1 and a bovine serum albumin rejection of 99.31 ± 0.22 %, which are ca. 340 % and 0.7 % higher than those of the control PES membrane, respectively. Importantly, the composite membrane also displayed enhanced anti-organic and anti-biofouling properties with the assistance of the introduced PMo12. This work provides an efficient pathway to simultaneously enhance the filtration and antifouling performance toward the further advancement of UF membrane for water purification.

N-Doped TiO2 Coupled with Manganese-Substituted Phosphomolybdic Acid Composites As Efficient Photocatalysis-Fenton Catalysts for the Degradation of Rhodamine B.

The effectiveness of photocatalytic and Fenton reactions in the synergistic treatment of water pollution problems has become indisputable. In this paper, nitrogen-doped TiO2 was selected as the catalyst for the photocatalytic reaction and manganese-substituted phosphomolybdic acid was used as the Fenton reagent, the two of which were combined together by acid impregnation to construct a binary photocatalysis-Fenton composite catalyst. The degradation experiments of the composite catalyst on RhB indicated that under UV-vis irradiation, the composite catalyst could degrade RhB almost completely within 8 min, and the degradation rate was 19.7 times higher than that of N-TiO2, exhibiting a superior degradation ability. Simultaneously, a series of characterization methods were employed to analyze the structure, morphology, and optical properties of the catalysts. The results demonstrated that the nitrogen doping not only expanded the photo response range of TiO2 but reduced the work function of TiO2, which facilitated the transfer of electrons to the loaded Mn-HPMo side and further promoted the electron-hole separation efficiency. In addition, the introduction of Mn-HPMo provided three pathways for the activation of hydrogen peroxide, which enhanced the degradation activity. This study provides novel insights into the construction of binary and efficient catalysts with multiple hydroxyl radical generation pathways.

Facile One-Step Preparation of Mesoporous Siliceous Phophsomolybdic Acid for Proton Exchange Membrane

Background: Proton exchange membrane is an art of PEM fuel cells, developing active materials with robust structure and high proton conductivity has attained huge attention in recent decades amongst researchers. Aims/objectives: Here, we have developed a novel approach to prepare a siliceous mesoporous heteropoly acid with high stability in polar media and high proton conductivity to be utilized as proton exchange membrane. Methods: A highly stable mesoporous siliceous phosphomolybdic acid has been synthesized via a simple self-assembly between Phosphomolybdic Acid (PMA), the polymeric surfactant, and the silica precursor stabilized by KCl molecules as a proton conducting material for proton exchange membrane application. Results: As prepared, siliceous mesoporous phosphomolybdic acids (mPMA-Si) show a high surface area with a highly crystalline structure; however, the crystallinity is reduced by increasing the silica content. Further analysis proved the Keggin structure remains intact in final materials. mPMA-8 Si shows the highest performance among all the materials studied with proton conductivity of 0.263 S.cm-1 at 70 °C. Conclusion: As prepared, mPMA-xSi has shown a very high proton conductivity in a range of temperatures, making them a promising material for proton exchange membrane.

Phosphotungstic Acid-treated Picrosirius Red Staining Improves Whole-slide Quantitative Analysis of Collagen in Histological Specimens.

We tried to prevent nonspecific nuclear staining (NS-NS) of picrosirius red (PSR) staining by treating the specimens with one of the heteropoly acids phosphotungstic acid (PTA). We analyzed a total of 35 cases of non-cancerous liver tissue for fibrosis and NS-NS under PSR-alone, phosphomolybdic acid (PMA)-pretreated PSR (PMA + PSR), or PTA-pretreated PSR (PTA + PSR) condition. In addition, we analyzed the photosensitivity of PMA or PTA single stain specimens. PTA + PSR significantly suppressed NS-NS compared with PSR. The color of the specimens did not change into blue by 30 times the exposure to whole slide scanner (WSS) light. The PTA + PSR condition showed the highest correlation with the Ishak score (pathological evaluation of liver fibrosis) compared with other conditions. Furthermore, Sirius Red-positive percentage (SRP%) in PSR was increased in the NS-NS observed cases. SRP% in PMA + PSR was significantly affected by WSS light exposure time. Moreover, the deposition of non-polarized PSR-stained substances (NP-PSR+S) clinging to the collagen fibers potentially explains why SRP% seemed bigger under PSR than PTA + PSR. Our protocol enabled us to analyze the whole slide image of PSR staining by high magnification, which would contribute to the accurate analysis of collagen amount in the tissue sections.

Thick pore walls mesoporous silicon composites based on phosphomolybdic acid: An efficient catalyst for oxidation desulfurization reaction

In this paper, phosphomolybdic acid (HPMo) solution was chosen as a synthetic medium and active ingredient to replace hydrochloric acid, and the thick porous wall silicon composite based on HPMo (HPMo@OMS) was prepared by the one-step co-condensation method, which simplified the preparation process and improved the stability of the molecular sieve framework structure. The composite materials have the same ordered 2D hexagonal mesoporous structure as SBA-15. Compared to the traditional SBA-15 loaded HPMo (HPMo@SBA-15) synthesized in hydrochloric acid solution, the characterization results showed that the pore wall thickness of HPMo@OMS is about 2 nm thicker than the HPMo@SBA-15. Under mild experimental conditions, the catalyst has high desulfurization activity, and the removal rate of sulfur-containing substrate reaches 100%. In addition, after 10 desulfurization cycles, the Mo content of the composites recovered by centrifugation 13.74HPMo@OMS was only 1.67% by ICP-AES, the results after ten cycles of experiments showed that the removal rate of DBT could still reach 93.5%.

Solvent free hydrogenation of levulinic acid over in-situ generated Ni(0) stabilized by supported phosphomolybdic acid using formic acid as an internal hydrogen source

The present work demonstrates, in-situ generation of Ni(0) nanoparticle stabilized by phosphomolybdic acid during the reaction. Nickel exchanged supported phosphomolybdic acid, Zirconia is use as support, (Ni–PMo12/ZrO2) was synthesized, characterized by various physicochemical methods and its catalytic activity was evaluated for the solvent free aqueous phase hydrogenation of lignocellulosic biomass-derived levulinic acid (LA) using formic acid (FA) as internal hydrogen source. FA is promising green hydrogen storage molecule which is selectively hydrogen removed from its chemical structure and utilized it in a variety of catalytic hydrogenation reaction. FA is unique hydrogen source with high hydrogen content (4.4 wt%), low flammability, low toxicity and ease in handling as compared to other hydrogen source. To achieve outstanding performance of the catalyst, a detailed assessment of vital reaction parameters (mole ratio of FA, catalyst amount, temperature and time) were carried out. The catalyst shows outstanding activity (94% conversion) with a very low amount of Ni(0) (0.00247 mmol) and high TON (1092) for LA hydrogenation. The catalyst was found to be sustainable up to three catalytic cycles without any alteration in activity. The hot filtration test shows true heterogeneous nature of the synthesized catalyst as well as stabilizing nature of PMo12. In situ formed Ni(0) was confirmed by thoroughly characterizing the regenerated catalyst by XPS, TEM, HR-TEM and STEM. The catalyst exhibits superior activity against reported catalysts. Also a plausible mechanism was proposed based on control experiments.

Preparation of hexagonal boron nitride supported phosphomolybdic tungstic acid catalysts with different alkyl substituted imidazolium cations: Insight into hydrophobicity and electron transfer

In this study, a series of hexagonal boron nitride (h-BN) supported phosphomolybdic tungstic acid (POM) catalysts with different alkyl substituted imidazolium cations were successfully synthesized. The oxidative desulfurization (ODS) performance of the different catalysts was evaluated. The ODS of benzothiophene (BT), dibenzothiophene (DBT), 4,6-dimethyldibenzothiophene (4,6-DMDBT) and actual diesel was conducted by using [C12mim]3PMo6W6O40/h-BN as the catalyst and H2O2 as the oxidant. The [C12mim]3PMo6W6O40/h-BN catalyst was analyzed by FT-IR, XPS, XRD, TEM, contact angle testing, and nitrogen adsorption–desorption. In addition, DBT was converted completely in 20 min under the optimum conditions. We also showed evidence that electron transfer between [C12mim]3PMo6W6O40 and h-BN can promote oxidative desulfurization. In addition, even after 20 cycles, the activity of the catalyst did not decrease obviously. Finally, the catalytic mechanism occurring during the ODS process was investigated.

PMo12 as a redox mediator for bio-reduction of Cr(VI): Promotor or inhibitor?

Slow reduction rate and low reduction ability were the main limitations of bio-reduction of Cr(VI). As an efficient redox mediator, how phosphomolybdic acid (PMo12) affected bio-reduction of Cr(VI) was worthy of exploration. In this study, short-term and long-term effects of PMo12 on Cr(VI) reduction were investigated to reveal the relevant mechanism. After evaluating the short-term effect of PMo12 concentration from 0.05 to 1.00 mM on Cr(VI) bio-reduction, 0.50 mM was found to be optimum by improving Cr(VI) reduction rate by 16.3 % and microbial electron transport system activity (ETSA) by 43.0 % with Cr(VI) reduction efficiency of 100 % in short-term (22 h) batch experiments. By contrast, in long-term (28 days) continuous flow experiments, 0.50 mM PMo12 exhibited serious inhibition on Cr(VI) bio-reduction. The cumulative toxicity of Mo, strong oxidative stress (reactive oxygen species increased by 16.5 %), the inhibition of extracellular polymeric substances production and the reduction of microbial activity were proved to be the main inhibition mechanism. In terms of microbial electron transport system, the main electron carriers including flavin mononucleotide (FMN), nitrate reductase (NAR), nitrite reductase (NIR) were seriously inhibited. BugBase analysis confirmed that the relative abundance of biofilm forming bacteria decreased after PMo12 addition, and the relative abundance of oxidative stress tolerance bacteria continued to increase.

Photoelectrochemical hydrogen evolution from biomass conversion using perovskite solar cells

Lignocellulosic biomass presents a renewable alternative to fossil carbon sources for the production of commodity chemicals and fuels. Photoelectrochemical biomass conversion produces carbon-free fuel in the form of molecular hydrogen and simultaneously provides a source of value-added chemical products. Recently in Nature Communication , S.Y. Jang, J.-W. Jang, J. Ryu, and co-workers reported bias-free photoelectrochemical solar hydrogen production coupled to lignocellulosic biomass degradation using a perovskite-based photocathode with anodic lignin depolymerization mediated by phosphomolybdic acid. Lignocellulosic biomass presents a renewable alternative to fossil carbon sources for the production of commodity chemicals and fuels. Photoelectrochemical biomass conversion produces carbon-free fuel in the form of molecular hydrogen and simultaneously provides a source of value-added chemical products. Recently in Nature Communication , S.Y. Jang, J.-W. Jang, J. Ryu, and co-workers reported bias-free photoelectrochemical solar hydrogen production coupled to lignocellulosic biomass degradation using a perovskite-based photocathode with anodic lignin depolymerization mediated by phosphomolybdic acid.

Synergistic effects of heteropoly acids and sulfolane on fractionation and utilization of willow

Efficient pretreatment to decrease the recalcitrance of lignocellulosic biomass is considered to be an essential precondition for lignocellulosic valorization. In this study, the heteropoly acids (i.e., phosphotungstic acid, silicotungstic acid and phosphomolybdic acid) assisted sulfolane organosolv pretreatment was developed to reduce the recalcitrance of willow ( Salix matsudana cv. Zhuliu ) for effective saccharify cation and the subsequent lignin valorization. The pretreatment notably increased the accessibility of cellulose with a high glucose yield of 94.77%. The 75.60% of lignin was recovered from the willow with silicotungstic acid assisted sulfolane organosolv pretreatment at 150 °C for 1.5 h. In addition, the recovered lignin had high purity (∼98%), moderate molecular weight (3378–3585 g/mol), low polydispersity (∼2.0) and good antioxidant properties (the RSI value was 1.18). Lignin nanospheres (LNSs) with different morphologies were prepared by separating lignin, which increased the potential application of lignin. Overall, the heteropoly acids assisted sulfolane pretreatment proved to be a promising approach for enzymatic hydrolysis of cellulose and lignin valorization. • Effects of pretreatment process are improved compared with the condition without catalyst. • Glucan digestibility reach to 94.7%. • Lignin reaches a purity of 98.0% and an extraction ratio of 75.6%. • Lignin has better antioxidant activity than commercial antioxidant butylated hydroxytoluene (BHT). • Lignin nanospheres (LNSs) with different morphologies were prepared, which increased the potential application of lignin.

Preface

The 2022 International Symposium on Semiconductor and Electronic Technology (ISSET 2022), scheduled to be held on August 12-14, 2022 in Fuzhou, China, was changed to be held as a virtual conference. ISSET 2022 promoted the development and application of theories and technologies in the fields of semiconductor and electronic technology in universities and enterprises, established business or research contact and found global partners for future careers for all the participants.During the conference, we had the honor of having invited both Prof. Zhigang Zang from Chongqing University, China and Prof. Jiangzhao Chen from Chongqing University, China to serve as our Conference General Chairs. This online conference was composed of three parts: keynote speeches, oral presentations and online Q&A discussion, attracting 60 delegates from all over the world. Firstly, keynote speakers were each allocated 30-45 minutes to hold their speeches. Then in the oral presentations, the excellent papers we had selected were presented by their authors one by one.At the beginning of the conference, five distinguished keynote speakers were invited to address their speeches. Among them, Prof. Wenli Zhou from Huazhong University of Science and Technology, China performed a thought-provoking speech on: Reservoir Computing Based on Carbon Nanotube Network. Due to the great interest on the implementation of Reservoir Computing (RC) on novel hardware, her team fabricated a physical reservoir consisting of single-walled carbon nanotubes (SWCNTs) network with phosphomolybdic acid modification and investigated its computing architecture and characteristic dynamics, demonstrating high performances in several test benches. Moreover, Prof. Junjie Qi from University of Science and Technology Beijing, China shared with us his study: In-situ Atomic Scale Studies of Structural Transitions for 2D TMDs. His team studied the phase transition and interlayer structure transition of bilayer PtSe2 under electron beam irradiation and combined atomic resolution STEM and DFT calculation to study the behavior of interlayer stacking orders and interlayer rotations in bilayer PtSe2, revealing the phase transition and interlayer structure transition mechanisms of PtSe2 at atomic scale. Their dramatic speeches had triggered heated discussion in the third part of the conference. Besides, every participant praised this conference for disseminating useful and insightful knowledge.List of Committee member is available in this pdf.