SnO2 Content Research Articles

Microstructure and resistivity of ITO targets sintered by cold and microwave sintering for solar cell applications

High mobility of ITO films for solar cells is enhanced by decreasing SnO2 content in ITO gargets. However, the sintering densification of ITO targets becomes difficult. The density of ITO targets with low SnO2 content is enhanced by TiO2, SiO2 and cold sintering. The green bodies of ITO are first compacted by cold sintering and then further fully densified by microwave sintering. Three types of ITO targets exhibit single cubic bixbyite structure, dense microstructure and transgranular fracture. ITO targets sintered at a microwave temperature of 1450 °C have a high relative density of over 99% and low resistivity of below 4.87 × 10−4 Ω·cm. The fine grains have a size of less than 2.0 μm. Therefore, the synergistic effect of additives and the sintering process can resolve the difficulty of sintering densification of ITO targets with low doping content.

Influence of Accelerators and Filler Content on Physical Properties of Tin Dioxide Reinforced Deproteinized Natural Rubber Nanocomposites

The global electrical industry is looking for sustainable materials in various domains, including electrical insulation cable materials. Tin dioxide (SnO2) nanoparticles combined with deproteinized natural rubber (DPNR) have the potential to produce an excellent and green electrical insulation material that combines their parents’ electrical properties. Yet, the processability is highly influenced by the curing system. The cure characteristics of rubber nanocomposites were investigated for the influence of different accelerators and SnO2 content. The 2,20-dithiobis (benzothiazole) (MBTS)-cured compounds exhibit ultrafast curing and higher melt viscosity than the N-Cyclohexyl-2-benzothiazole sulphonamide (CBS)-cured nanocomposite compounds, regardless of the increment in SnO2 loadings. Therefore, CBS-cured nanocomposites exhibit acceptable process safety, good processability and properties. The morphological, thermal and compositional analyses further supported the density, swelling behaviour and hardness of the DPNR nanocomposites of the selected accelerator system.

Effect of SnO2 Nanoparticles Content on Ignition and Combustion Performance of Boron Particles

Abstract Boron is a potential metallic fuel substitute for solid propellant, however, its application has been limited by the surface oxide layer. Metal oxide are proposed to improve its oxidation performance. In the paper, boron particles were coated with SnO2 nanoparticles (n-SnO2) by a hydrothermal method. The B@SnO2 particles were characterized by SEM, TEM, and XRD. The results show that the boron particles were uniformly coated with n-SnO2 with range from 5 nm to 20 nm. The thermal oxidation, ignition and combustion performances were characterized by using TG-DSC, oxygen bomb calorimeter and laser ignition testing system. The relationship between the content of SnO2 and the performance of ignition and combustion were established. Significant reduction of oxidation temperature of boron particles was observed after coating with n-SnO2. The effect was more obvious with increasing SnO2 content. Furthermore, with the increase of SnO2 content, the ignition delay time of B@SnO2 particles decrease, its heat of combustion and combustion efficiency first increase then decreases gradually. Compared with boron particles, the maximum combustion efficiency of B@SnO2 particles reaches to 86.03%, increased by 57.19%, and the minimum ignition delay time reaches to 8 ms, decreased by 46.7%. Therefore, the coating significantly reduced ignition temperature and increased heat, and the particles has profound application potential as the solid fuel.

Hydrogen sulfide enhances the disease resistance of ginger to rhizome rot during postharvest storage through modulation of antioxidant response and nitric oxide-mediated S-nitrosylaion

Postharvest pathogenic infestation leads to the quality deterioration in ginger industry. Hydrogen sulfide (H2S), as an emerging potential postharvest protectant, could enhance disease resistance. This study investigated the antifungal role of H2S against Fusarium solani during ginger postharvest storage. The results showed that H2S restricted widespread infection by F. solani in gingers and have direct antimicrobial activity against F. solani in vitro, inhibiting mycelial growth and spore germination. H2S improved endogenous H2S accumulation, increased the activities of POD, CAT and SOD, and facilitated the removal of excess ROS. It also promoted the lignin, total phenolic and flavonoid contents, while boosting the activities of PAL, C4H and 4CL, and up-regulating the expression of ZoPAL, ZoC4H and Zo4CL. Moreover, H2S increased endogenous NO levels through the NR and NOS pathways. Notably, the endogenous SNO content was increased, the GSNOR activity as well as expression of GSNOR were down-regulated by H2S treatment. These effects were reversed by hypotaurine (HT), a scavenger of H2S. Together, these results indicated that H2S induces the disease resistance in postharvest ginger storage via enhancing antioxidant and defense capacity, regulating phenylpropane metabolism, inducing NO production and mediating NO-dependent S-nitrosylation modification. These results provide guidance for the application of H2S during the storage of ginger.

Design and performance exploration of Pb-free low-cost all-inorganic perovskite-inspired CuAgBi2I8 solar cells: theoretical approach

Abstract Organic–inorganic halide perovskites have demonstrated great potential for photovoltaic applications owing to their unprecedented optoelectronic properties and low manufacturing costs. However, the commercialization of this technology is hindered by its thermal instability and inherent toxicity. In this study, SCAPS-1D simulation software was used to study the performance of solar cell based on CuAgBi2I8, which is a novel inorganic non-toxic lead-free perovskite-inspired material. Different electron transport layers (TiO2, In2S3, ZnO, Zn0.75Mg0.25O,SnO2 and SrTiO3) and hole transport layers (CuI, PEDOT:PSS, CuSCN and Cu2O) were studied, our research indicated that SnO2 and NiO formed the optimal combination. Further analysis revealed that the optimal absorption layer thickness was 900 nm, the absorption layer doping concentration should be less than 1 × 1013 cm−3 and the defect density should be less than 1 × 1014 cm−3. The optimal thickness of SnO2 and NiO was 30 nm, the optimal doping concentration of SnO2 and NiO was 1 × 1020 cm−3, the defect density of absorber layer/SnO2 and absorber layer/NiO interfaces should be less than 1 × 1012 cm−3, C was the optimal back electrode material. Consequently, the optimal device configuration was identified as FTO/SnO2/CuAgBi2I8/NiO/C, the efficiency was improved from original 2.76% to 19.10% after above optimization. These results indicate that solar cell with CuAgBi2I8 as the absorber layer is a potential alternative to organic–inorganic lead halide perovskite solar cells.

Effect of stannous oxide on the structure and properties of iron phosphate glass

A novel phosphate glass of the P2O5-SnCl2-Fe2O3 system was synthesized using the melt-cooling technique. The effect of substituting SnO for SnCl2 on the properties of the glass was systematically explored. The material was analyzed using X-ray diffraction (XRD), differential scanning calorimetry (DSC), Fourier-transform infrared spectroscopy (FTIR), and a thermal expansion test. The thermal expansion coefficient (TEC) analysis revealed that the glass transition temperature initially rises and subsequently falls with increasing SnO content. The incorporation of Sn and Fe ions not only reduces the characteristic temperature of the glass but also enhances its chemical stability, presenting significant potential for applications in low-temperature sealing technologies.

Tuning architectural synergy reactivity of nano-tin oxide on high storage reversible capacity retention of ammonium vanadate nanobelt array cathode for lithium-ion battery

Enabling ambient cycling stability of vanadium-based materials is of fundamental importance in the advancement of next generation electrodes for high-performance lithium-ion batteries. Although, extending these host layered nano-architectures illustrate the effective electrochemical activity by regulating the gallery space for fast Li+ storage, the reported structural integrity in terms of the cycling stability for vanadium-based cathodes is highly challenging. In present study, a series of NH4V4O10-SnO2 (NHV-SnO2) nanocomposite consisting of diverse contents of SnO2 (x: 5.0, 15.0 and 30.0 wt%) were synthesized through a three-step program based on sonochemical-calcination-hydrothermal treatment and employed as an advanced energetic material for lithium-ion battery cathodes. For the first time, understanding the impact of SnO2 loading on electrochemical reactions of NHV-based electrodes was regarded as an effective engineering strategy to optimize structural modulation and cell lifetime without distinct capacity fading. Notably, combination of NHV and SnO2 in optimum proportions not only enhances the specific surface area, but also expand buffer the volume change for lithium-ion intercalation/extraction. By this design, the assembled battery containing 15.0 wt% SnO2 illustrated stable capacities of 301.77 mAh g−1 (30 mA g−1) and 232.05 mAh g−1 (240 mA g−1) with capacity retention values as high as 97.94 % and 97.03 % for 50 cycles, respectively. Of note, the results described here could show a vital guidance toward designing better composite-based cathode material for energy storage devices.

Fabrication and detection characteristics evaluation of SnO2@WO3 film as an effective NO2 gas sensor

In this article, tin oxide (SnO2) doped tungsten oxide (WO3) was deposited on Si substrate as an effective NO2 gas sensor via pulsed laser deposition (PLD) considering different content of SnO2 to WO3. Further, the correlation between the investigated microstructural and sensing characteristics was thoroughly elaborated. Specifically, an increment in the SnO2 content from 10:90 to 30:70 % resulted in smaller nanoparticle diameter (53.9–45.9 nm); the attained energy bandgap exhibited an inverse profile along considerably high electrical resistance alteration. In detail, the gas response increased from 30.7 to 39.5 for the addressed SnO2 to WO3 contents, respectively. The examined operating temperature indicated a negative correlation along the evaluated sensing profile with R2 value of −0.98. The time-resolved characteristics of the optimum gas sensor (@30:70) revealed rise/fall time of 6 and 13 sec. at 150 °C, respectively; this was found to be pronouncedly higher at higher operating temperatures.

S-nitrosoglutathione (GSNO) induces necroptotic cell death in K562 cells: Involvement of p73, TSC2 and SIRT1

BackgroundNitric oxide and Reactive Nitrogen Species are known to effect tumorigenicity. GSNO is one of the main NO carrying signalling moiety in cell. In the current study, we tried to delve into the effect of GSNO induced nitrosative stress in three different myelogenous leukemic K562, U937 and THP-1 cell lines. MethodWST-8 assay was performed to investigate cell viability. RT-PCR and western-blot analysis were done to investigate mRNA and protein expression. Spectrophotometric and fluorimetric assays were done to investigate enzyme activities. ResultWe found that GSNO exposure led to reduced cell viability and the mode of cell death in K562 was non apoptotic in nature. GSNO promoted impaired autophagic flux and necroptosis. GSNO treatment heightened phosphorylation of AMPK and TSC2 and inhibited mTOR pathway. We observed increase in NAD+/ NADH ratio following GSNO treatment. Increase in both SIRT1 m-RNA and protein expression was observed. While total SIRT activity remained unaltered. GSNO increased tumor suppressor TAp73/ oncogenic ∆Np73 ratio in K562 cells which was correlated with cell mortality. Surprisingly, GSNO did not alter cellular redox status or redox associated protein expression. However, steep increase in total SNO and PSNO content was observed. Furthermore, inhibition of autophagy, AMPK phosphorylation or SIRT1 exacerbated the effect of GSNO. Altogether our work gives insights into GSNO mediated necroptotic event in K562 cells which can be excavated to develop NO based anticancer therapeutics. ConclusionOur data suggests that GSNO could induce necroptotic cell death in K562 through mitochondrial dysfunctionality and PTM of different cellular proteins.

SnO2-Based Interfacial Engineering towards Improved Perovskite Solar Cells.

Interfacial engineering is of great concern in photovoltaic devices. Metal halide perovskite solar cells (PSCs) have garnered much attention due to their impressive development in power conversion efficiencies (PCEs). Benefiting from high electron mobility and good energy-level alignment with perovskite, aqueous SnO2 as an electron transport layer has been widely used in n-i-p perovskite solar cells. However, the interfacial engineering of an aqueous SnO2 layer on PSCs is still an obscure and confusing process. Herein, we proposed the preparation of n-i-p perovskite solar cells with different concentrations of SnO2 as electron transport layers and achieved optimized PCE with an efficiency of 20.27%. I Interfacial engineering with regard to the SnO2 layer is investigated by observing the surface morphology, space charge-limited current (SCLC) with the use of an electron-only device, and time-resolved photoluminescence (TRPL) of perovskite films.

Green synthesis of g-C3N4 decorated with SnO2 nanocomposites using a novel Ananas comosus crown extract for boosted performance of asymmetric supercapacitors

The recent development of green chemistry, when preparing nanoparticles using plants and their various parts has received a lot of attention in today's world. Metal and metal oxide nanoparticles have gained recognition for their recent advances in green synthesis. In this work, the green synthesis of a 2D g-C3N4 nanosheet decorated with SnO2 nanocomposite was prepared by Ananas comosus crown extract for electrochemical storage applications. The novel Ananas comosus crown extract acts as a reducing or capping agent for a green approach. The prepared g-C3N4/SnO2 nanocomposites were studied with structural, functional group, morphological, elemental composition, chemical state, and surface area analysis of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman, Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET). SnO2 and various concentrations of g-C3N4 (25, 50, 75 & 100 mg) nanocomposite were investigated for electrochemical performance. At a current density of 1 Ag−1, the green synthesized (SnO2/g-C3N4 (50 mg)) SCN-50 nanocomposite displays a high specific capacitance of 302.7 Fg−1, as well as the composite demonstrates excellent capacitance retention of 94 % after 10,000 loops. Moreover, the asymmetric supercapacitor device of SnO2/g-C3N4//Activated carbon performed good reversible and cyclic stability with high energy and power density. The green synthesis of SnO2/g-C3N4 nanocomposite has promising electrode materials for future energy storage devices.

Tuning the amount of Sn0 around Ru to promote hydrodeoxygenation of furfural

2-methylfuran (2-MF) is a high-performance gasoline additive due to its high-octane value and good explosion resistance. In this study, cerium tin oxide solid solutions were prepared by a co-precipitation method. The selectivity of 2-MF and the conversion of furfural significantly improved after doping CeO2 with SnO2. 95 % yield of 2-MF was obtained on 5 %Ru/Ce0.975Sn0.025O2, compared to only 40 % yield on 5 %Ru/CeO2. The reaction rate of furfural over 5 %Ru/Ce0.975Sn0.025O2 was 4.9 times higher than that with 5 %Ru/CeO2. Characterizations show an increased concentration of SnO2 around Ru, and the ratio of Ruδ+/Ru reaches a maximum on 5 %Ru/Ce0.975Sn0.025O2. The binding energy shift of Ru0, Sn0, O, and Ce3+ indicates that the introduction of Sn plays an important role in regulating the interface between Ru and CeO2. The increase of Ruδ+/Ru ratio benefits the hydrodeoxygenation of furfural and contributes to the high yield of 2-MF. This study provides a highly active catalyst for the hydrodeoxygenation of furfural.

Substitution of Sn in the high-permeability MnZn ferrite for wide temperature applications

To meet the challenge of varied working temperatures of inductance components in new energy vehicle and 5G communication, the high-TC high-permeability MnZn ferrite with excellent temperature stability was developed by the addition of SnO2. In this series of samples, initial permeability μi maintains large values in a wide temperature range. With increasing the SnO2 content, the temperature of the second permeability peak Tsp decreases and meanwhile Curie temperature TC maintains as high as 160 °C. For the best sample with 6000 ppm SnO2, μi at 25 °C is 7244 and exhibits the excellent temperature stability with the low specific temperature coefficient of 0.35 × 10−6 °C−1 between 25 and 130 °C. The addition of SnO2 generates Fe2+ and adjusts the magneto-crystalline anisotropy constant K1 = 0 point, which is responsible for the wide-temperature high permeability. The effect of SnO2 addition on magnetization process has also been clarified.

Structural, physical, optical, and gamma ray shielding properties of SnO2-based boro-silicate glasses: The influence of substituting Na2O by SnO2

The study focuses on creating new boro-silicate glasses doped with SnO2 for radiation shielding. It examines how substituting Na2O with SnO2 affects their structural, optical, and shielding properties. Density increases from 2.406 to 2.488 g/cm³ with rising SnO2, measured via the Archimedes Method. The examination for the glassy phase was performed using the XRD diffractometer. UV/Vis spectrophotometer analysis reveals reduced refractive index (2.412–1.976) and increased optical absorption-band gap (direct: 3.648–5.662 eV; indirect: 2.994–5.163 eV) with SnO2 concentrations of 0–9 mol.%). The effectiveness of the radiation shielding was assessed over the 0.059–1.408 MeV gamma-ray energy interval. The analysis demonstrates that when the concentration of SnO2 increases, the synthesized glasses' linear attenuation coefficient improves. As the SnO2 content was raised between 0 and 9 mol%, the linear attenuation coefficient rose between 0.489 and 2.892 cm−1 (at energy of 0.059 MeV) and between 0.126 and 0.128 cm−1 (at energy of 1.408 MeV), respectively. As the SnO2 content was raised between 0 and 9 mol%.

Crystallization behavior and properties of ZnO–MgO–Al2O3–SiO2 transparent glass-ceramics with SnO2 and ZrO2 as nucleating agents

Transparent ZnO–MgO–Al2O3–SiO2 (ZMAS) glass-ceramics comprising ZrO2 and SnO2 as nucleating agents were prepared via melting and two-step heat treatment. The effects of varying the SnO2 concentration (1–3 mol%) on the crystallization behavior, microstructures, and mechanical properties of the glass-ceramics were investigated. Increasing the SnO2 content promoted the precipitation of spinel and gahnite because SnO2 improved the formation of ZrO2 nanocrystals, which provided nucleation sites for subsequent crystallization. When the SnO2 content was varied between 2 and 3 mol%, the crystallization behavior of the ZMAS glass-ceramics showed little difference, and SnO2 crystals precipitated from the glass at a relatively low crystallization temperature. In addition, glass-ceramics containing 2 and 3 mol% SnO2 exhibited average grain sizes of ∼26 and ∼29 nm, respectively, but their transmittance decreased to ∼52% and ∼50%, respectively, owing to grain aggregation. The best overall performance was achieved when the SnO2 content of the glass-ceramic was 3 mol% and heat treatment was conducted at 780 °C for 3 h and 960 °C for 2 h, with the resulting glass-ceramic exhibiting a bending strength of ∼187 MPa and a Vickers hardness of ∼845 kgf/mm2.

Novel SnO2-modified hydrozincite photocatalyst: Material design and application in efficient micropollutants degradation in wastewater

In this work novel photocatalysts have been synthesized based on hydrozincite and SnO2 with varying mol% of SnO2 in hydrozincite. The photocatalysts were prepared via chemical co-precipitation using thermal urea hydrolysis, without calcination or activation processes, and were applied in the photodegradation of micropollutants (in this case, several phenolic compounds). Characterization of the materials using various techniques revealed that the generation of hydroxyl radicals, holes, and superoxide radicals played crucial roles in the photodegradation process. The best photocatalyst was achieved with a 10 mol% SnO2 content in hydrozincite, which shows the highest rate in the pollutants degradation (higher than 93% in all the cases), also higher than TiO2-P25This study presents promising insights for developing highly efficient photocatalytic materials for environmental remediation applications.

Room Temperature NH3 Selective Gas Sensors Based on Double-Shell Hierarchical SnO2@polyaniline Composites.

Morphology and structure play a crucial role in influencing the performance of gas sensors. Hollow structures, in particular, not only increase the specific surface area of the material but also enhance the collision frequency of gases within the shell, and have been studied in depth in the field of gas sensing. Taking SnO2 as an illustrative example, a dual-shell structure SnO2 (D-SnO2) was prepared. D-SnO2@Polyaniline (PANI) (DSPx, x represents D-SnO2 molar content) composites were synthesized via the in situ oxidative polymerization method, and simultaneously deposited onto a polyethylene terephthalate (PET) substrate to fabricate an electrode-free, flexible sensor. The impact of the SnO2 content on the sensing performance of the DSPx-based sensor for NH3 detection at room temperature was discussed. The results showed that the response of a 20 mol% D-SnO2@PANI (DSP20) sensor to 100 ppm NH3 at room temperature is 37.92, which is 5.1 times higher than that of a pristine PANI sensor. Moreover, the DSP20 sensor demonstrated a rapid response and recovery rate at the concentration of 10 ppm NH3, with response and recovery times of 182 s and 86 s.

High electric‐field‐induced strain of SnO2‐modified PLSBZT ceramic for actuator applications

AbstractIn this study, piezoelectric and ferroelectric properties of the Pb0.931La0.006Sr0.03Ba0.03(Zr0.535Ti0.465)O3–xwt%SnO2 (PLSBZT–xwt%SnO2) with x = 0–0.6 were investigated comprehensively. When the content of SnO2 was 0.55 wt%, the sample achieved optimum properties obtaining a high Curie temperature (259°C) and a large strain (0.203% at 20 kV/cm). In particular, the sample's maximum strain (Smax) remained stable with a variation of less than 4% between −20 and 120°C. Moreover, the PLSBZT–0.55 wt%SnO2 ceramic not only presented a small εr value of 1662, enabling the actuator to respond quickly, but also had a high value of g33 (35.8 × 10−3 V/m/N). These results implied that SnO2‐modified PLSBZT ceramics have significant potential for actuator applications owing to their high Curie temperature, large electric‐field‐induced strain, fast response, and good strain–temperature stability.

Sintering densification of ITO targets with low tin oxide content for depositing TCO films as electrodes of solar cells

Highly efficient solar cells demand transparent and conductive oxide films with high electronic mobility. Decreasing SnO2 content in In2O3 targets (ITO) is one of important ways, but resulting in difficulty of sintering densification. ITO targets with SnO2 contents of 1 wt%, 2 wt.% and 3 wt% were prepared by microwave sintering. Harmless sintering additives of TiO2 and trances of SiO2 promotes sintering densification. All the targets show the cubic bixbyite phase and dense microstructure. The fine grains with the average size of several microns were obtained. Higher sintering temperature contributes to eliminating the pores in targets, enhancing density and decreasing resistivity. The optimal sintering temperature of 1550 °C obtains the highest relative density (>99 %) and low resistivity (<3.4 × 10−4 Ω cm). The enhanced density of these ITO targets with low SnO2 content can effectively inhibit the formation of nodules on the surface of target during magnetron sputtering.

Heating properties of ITO ceramics with different Sn/In ratios

Indium tin oxide (ITO) ceramics with different SnO2 contents were fabricated using the conventional solid-state reaction. The phase structure, microstructure, electrical conductivity, heating, and mechanical properties were investigated in detail. The results showed that pure ITO ceramics with high relative density were obtained successfully. The ITO ceramics were cut into regular rectangles to serve as electrical heaters. Additionally, their saturation temperatures and thermal response times were tested at different voltages. The results showed that ITO ceramics with 10% SnO2 had the fastest thermal response rate and reached a saturation temperature of 376∘C at 1.5[Formula: see text]V voltage, the highest temperature reported in the literature for In2O3 ceramics. Moreover, In2O3 with 10% SnO2 showed good mechanical properties. Hence, ITO ceramics, as electrical heaters with low driving voltage and high response speed, are expected to have potential heating applications such as domestic heating and industrial production.