SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Jinxi Feng,Tiantian Zhang,Wen Yan,Jingxiang Sun,Shuanghong Tian,Zhili He,Ya Xiong
A new piezo-catalytic reactor (PCR) was constructed. It was used to investigate the piezocatalytic degradation of pollutants and simultaneous response of current. It was found that PCR with SnO 2 / t -BaTiO 3 /ITO film anode possessed a more favourable piezocatalytic degradation and piezo-current response than PCR with only ITO or t -BaTiO 3 /ITO film anode, individually. For HCOOH, the degradation rate, short circuit current (I sc ) and open-circuit voltage (V oc ) reached 77.8 mg·L -1 ·h −1 , 5.12 µA, and 0.65 V, respectively, under its optimal condition. Its anodic process predominantly involved the piezocatalytic oxidations of H 2 O to •OH and HCOOH to CO 2 , while the cathodic process was mainly related to the reduction of O 2 to •O 2 – or H 2 O 2 and reduction of H + ion to H 2 . Although these processes were depended on the energy band structure of t -BaTiO 3 and redox potential of cathodic reactions, they were all initiated by the piezoelectric effect of t -BaTiO 3 , which drove the separation of intrinsic free carries to generate oxidative holes and reductive electrons. These investigation results and findings not only deepened the understanding of its piezo-current response, but also possibly extended the application of piezocatalysis to fuel cell.
研究领域:
环境科学
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材料科学
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催化
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电化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shun-Shun Chen,Zi-Yi Shen,Jin-Xuan Song,Ming Tang,Guo-Hui Jiang
The cross-interference of multiple gases and their unknown concentrations in mixed environments renders identifying and determining single-phase gas concentrations in mixed environments a challenge for chemical-resistant metal oxide gas sensors. In this study, a dynamic temperature modulation strategy is proposed, and the temperature-controlled sensitivity behavior of porous SnO 2 nanofibers embedded with Fe 2 O 3 hollow spheres (Fe 2 O 3 @SnO 2 ) as a gas sensor under different frequency modulations is explored. Based on differences in their characteristic curves, linear discriminant analysis was employed to extract features and reduce dimensions. Seven different volatile organic compounds were successfully identified and analyzed. Convolutional neural networks were used to identify certain characteristics and predict the concentrations of single-phase gases in mixed-gas environments. Using training and data validation, seven single-phase gases were successfully separated and identified, with an accuracy of 99.8% for n-butanol. Linear regression analysis was also performed on different gas targets, and the actual concentration was highly consistent with the predicted concentration, rendering the Fe 2 O 3 @SnO 2 gas sensors useful for quantitative analysis.
研究领域:
化学传感
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纳米材料
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气体检测
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机器学习应用
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环境监测
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DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2020
·Vol. 35
·期 4
·719-725
·
IF 0.64
Zhang Chenxu,Wu Xiangfeng,Jia Yunning,Chang Tianlong,Liu Zhifeng,Fu Yunxuan,Liu Xutao,Wang Hui,Shi Yimai,Zuo Yuqian
The SnO 2 quantum dots (SnO 2 QDs)/ZnS nanosheets (ZnSNs) heterojunction was fabricated via an in-situ synthetic method at room temperature. Rhodamine B, potassium dichromate, and tetracycline were used to discuss the photocatalytic activities of the as-prepared samples under the visible light illumination. The photocatalytic mechanism of the as-prepared samples was also proposed. The experimental results indicate that the degradation efficiency of the as-prepared SnO 2 QDs/ZnSNs heterojunction first increases and then decreases with increasing the usage of ZnSNs. When the mass ratio of SnO 2 QDs to ZnSNs is 1: 2 in 180 min, the asprepared samples have the highest degradation efficiency of 89.1% for rhodamine B, 97.7% for potassium dichromate, and 83.8% for tetracycline, which are much higher than 51.7%, 26.8%, and 0.9% of pure SnO 2 QDs as well as 37.9%, 87.1%, and 19.1% of pure ZnSNs, respectively. After it is repeatedly degraded for 3 times, it possesses the degradation efficiency of 62.5% for rhodamine B, which increases by 200.5% in comparison with 20.8% of the pure SnO 2 QDs. Moreover, the enhanced photocatalytic performances of the as-prepared hybrids are attributed to the formation of heterojunction between the SnO 2 QDs and ZnSNs. In addition, hydroxyl radicals and superoxide anion radicals play major roles during the photocatalytic degradation process, while holes play a minor role.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Yefeng Feng,Kaidan Wu,Xiaoqian Deng,Jin Ke,BingWen Yang,Huafeng Dong,Deping Xiong,Miao He
The SnO2/Li4Ti5O12/C compound was gained via hydrothermal, sintering, and ball milling methods. Nano-grained SnO2/Li4Ti5O12 are homogeneously wrapped in a sheet-like graphite. Li4Ti5O12 possesses cyclic stability and superior rate capacity. Meanwhile, the SnO2/Li4Ti5O12 hybrid can supply abundant active sites for absorption of Li+, mitigate chemical stress in cycling, and prevent the ultrathin graphite nanosheets from stacking. Besides, the sheet-like graphite could reduce volume variation in cycling and reduce transmission distance for the electron or Li+. Therefore, an outstanding electrochemical property of the SnO2/Li4Ti5O12/C composite can be obtained.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
Journal of Cleaner Production
·
2021
·
IF 9.297
Jingyun Zhao,Zexu Chi,Heng Dong,Changfu Sun,Han Yu,Hongbing Yu
This study explored the depth treatment of desphenly chloridazon (DPC) wastewater by a novel synergetic dual-electrodes electrocatalytic (SDEs) system which consisted of Ni–Sb–SnO 2 /Ti anode (NSSTA) and PEDOT/PSS-CNTs modified activated carbon air diffusion cathode (PP-CNTs AC ADC). NSSTA exhibited an enhanced capability to produce reactive oxygen species (·OH and O 3 ), its O 3 production increased to 6.54 mg/L. PP-CNTs AC ADC was observed to have improved activity of catalyzing oxygen reduction reaction (ORR) with 648.23 mg/L H 2 O 2 generated. Owing to the synergetic effect of O 3 and H 2 O 2 , additional ·OH was obtained in SDEs system through the electro-peroxone reaction. Compared with the single-electrode electrocatalytic (SE) systems, the SDEs system showed superior pesticide degradation performance , higher mineralization current efficiency (MCE) and lower energy consumption (EC). In the SDEs system, the optimal 91.7% of DPC removal efficiency and 90.7% of DPC mineralization efficiency were obtained within 150 min by electrocatalytic oxidation of 17.5 ppm and 25 ppm pesticide wastewater at the current density of 11.94 mA/cm 2 , respectively. The treated water showed reduced acute toxicity than that of the raw wastewater, which suggested that the SDEs system is a promising technology for depth treatment of the pesticide industry effluent with simultaneous decontamination and detoxification realized.
研究领域:
环境工程
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水处理
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电化学
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废水处理
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产品关联
DOI
高影响因子
ANALYST
·
2019
·Vol. 145
·期 2
·619-625
·
IF 4.019
Nuo Zhang,Yaoguang Wang,Guanhui Zhao,Chao Wang,Yueyuan Li,Yong Zhang,Huan Wang,Qin Wei
An ultrasensitive label-free photoelectrochemical (PEC) immunosensor was developed to detect amyloid β-protein (Aβ) based on CdS/CdTe-cosensitized SnO2 nanoflowers. Specifically, SnO2 with a flower-like porous nanostructure was utilized as a perfect substrate for the construction of PEC immunosensors, and the SnO2-modified electrode was first coated with CdTe quantum dots (QDs) and then further deposited with CdS by successive ionic layer adsorption and reaction techniques. The formed SnO2/CdS/CdTe-cosensitized structure exhibited excellent photocurrent intensity and was employed as an excellent photoactive matrix to immobilize Aβ antibody to further construct the immunosensor. Under optimal conditions, the as-constructed PEC immunosensor was used to detect Aβ and exhibited a wide linear concentration range from 0.5 pg mL−1 to 10 ng mL−1, with a low limit of detection (LOD, 0.18 pg mL−1, S/N = 3). Meanwhile, it also presented good reproducibility, specificity, and stability and may open a new promising platform for the clinical detection of Aβ or other biomarkers.
研究领域:
生物传感器
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纳米技术
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光电化学
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分析化学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Hongtao Liu,Chong Chen,Yucheng Liu,Haoran Sun,Xu Huang,Zhijing Wang,Lizhang Wang
Electrochemical oxidation (EO) has emerged as a promising technology for eliminating recalcitrant organic pollutants from wastewater, yet its industrial implementation is constrained by the intrinsic limitations of conventional anodes, including sluggish charge transfer kinetics, rapid passivation, and excessive energy consumption. The simultaneous resolution of these drawbacks at low cost remains challenging. Herein, we engineered high-efficiency and stable CoNi-Sb-SnO 2 /enhanced TiO 2 nanotube arrays (ETNA) anode through a novel dual-strategy cobalt doping. Cobalt-triggered electron shuttling and ETNA interlayer optimization synergistically enhances the electrode’s electrocatalytic activity, conductivity, and stability. Experimental results reveal that Co dopants create electron-deficient centers to enrich charge density on adjacent Sn/Sb sites, synergizing with Ni-mediated O 3 production to enable ultrafast hydroxyl radical (·OH) yield (93.9 % tetracycline removal in 30 min) across a broad pH range. Crucially, the cobalt-bridged ETNA interlayer, with enriched oxygen vacancy and reconstructed anode surface, significantly reduces charge transfer resistance by 62.2 % and suppresses substrate corrosion, extending the anode lifespan to 15.7-fold while saving 54.8 % energy consumption. Density functional theory (DFT) calculations further corroborate that Co doping declines the d-band center, weakening oxygen intermediate adsorption and facilitating ·OH desorption. This work establishes a paradigm for achieving comprehensive electrode performance enhancement through targeted electronic structure engineering, enabling the development of cost-effective and durable anodes with direct applicability to low-concentration organic wastewater treatment.
研究领域:
环境科学
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电化学
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材料科学
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水处理技术
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纳米技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
L.Y. Cao,P. Viktoriia,W.J. Fan,B. Hong,J.C. Xu,H.W. Chen,S. Qiu,M.M. Wei,N. Zhang,X.Q. Wang
SnO 2 /MOF-303 nanocomposites were synthesized via a wet impregnation method. • SnO 2 nanoparticles were well-dispersed in the mesopores of SnO 2 /MOF-303 nanocomposites. • SnO 2 nanoparticles greatly enhanced the humidity sensitivity of SnO 2 /MOF-303 sensors. • The response/recovery times and humidity hysteresis of 16.7SnM sensor are favorable. • This improvement came from the synergistic effect between the proton and electron transport. Mesoporous MOF-303 was synthesized via a hydrothermal method using H 3 PDC and AlCl 3 as precursors. Subsequently, SnO 2 nanoparticles were incorporated into the micropores of MOF-303 through a wet impregnation process, yielding the SnO 2 /MOF-303 nanocomposite. The nitrogen atoms within the MOF-303 framework form strong coordination interactions with Sn 4+ , effectively anchoring the SnO 2 species within the micropores. This nano-confinement effect further promotes the formation of SnO 2 nanoparticles at low temperatures. Morphological and microstructural characterization confirmed that the SnO 2 nanoparticles were uniformly dispersed within the SnO 2 /MOF-303 nanocomposite and primarily located in the micropores. Humidity-sensing measurements demonstrated that the incorporation of SnO 2 nanoparticles significantly enhanced the humidity sensitivity of the SnO 2 /MOF-303 sensor at room temperature. Among the four sensors prepared in this study, the 16.7SnM sensor (with a nominal SnO 2 content of 16.7 wt% in the precursor solution) exhibited the highest humidity sensitivity, the fastest response and recovery times, the lowest hysteresis, and excellent long-term stability. This substantial improvement in humidity-sensing performance is attributed to the synergistic effect between proton and electron transport, arising from the increased oxygen vacancies introduced by the SnO 2 nanoparticles. The outstanding performance of the 16.7SnM sensor presents a promising strategy for the development of high-performance humidity sensors Download: Download high-res image (231KB) Download: Download full-size image
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DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Yiyin Guan,Wenjie Liu,Shixiang Zuo,Xiangyu Yan,Jingyi Ni,Chao Yao,Fengqin Wu
Firstly, Sb–SnO 2 /potassium titanate (Sb–SnO 2 /K 4 TiO 4 (KTO)) was fabricated by a sol-gel method, and then TiO 2 nanorod arrays were grown on the surface of Sb–SnO 2 /KTO by a hydrothermal method (TiO 2 NRA/Sb–SnO 2 /KTO). The photocatalytic activity was evaluated by degrading tetracycline hydrochloride (TCH). The prepared samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL), ultraviolet–visible diffuse reflectance spectrometer (UV–Vis), and X-ray photoelectron spectroscopic characterizations (XPS). The results show that the Z-scheme heterojunction formed between SnO 2 /KTO and TiO 2 can enhance the range of light response. With the doping of Sb, the conductivity of the composite is enhanced, which is advantageous to the transfer of electron and the low recombination rate of electron-hole pairs. Thus, the doping of Sb is effective to improve the photocatalytic performance. Our work demonstrates the optimal doping amount of Sb is 5%. The degradation efficiency of TCH concentration can reach 95.6% after 2 h and TiO 2 NRA/Sb–SnO 2 /KTO shows good reusability .
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 9
·2123
·
IF 3.623
Ming Liu,Caochuang Wang,Pengcheng Li,Liang Cheng,Yongming Hu,Yao Xiong,Shishang Guo,Haoshuang Gu,Wanping Chen
Many low-dimensional nanostructured metal oxides (MOXs) with impressive room-temperature gas-sensing characteristics have been synthesized, yet transforming them into relatively robust bulk materials has been quite neglected. Pt-decorated SnO2nanoparticles with 0.25–2.5 wt% Pt were prepared, and highly attractive room-temperature hydrogen-sensing characteristics were observed for them all through pressing them into pellets. Some pressed pellets were further sintered over a wide temperature range of 600–1200 °C. Though the room-temperature hydrogen-sensing characteristics were greatly degraded in many samples after sintering, those samples with 0.25 wt% Pt and sintered at 800 °C exhibited impressive room-temperature hydrogen-sensing characteristics comparable to those of their counterparts of as-pressed pellets. The variation of room-temperature hydrogen-sensing characteristics among the samples was explained by the facts that the connectivity between SnO2grains increases with increasing sintering temperature, and Pt promotes oxidation of SnO2at high temperatures. These results clearly demonstrate that some low-dimensional MOX nanocrystals can be successfully transformed into bulk MOXs with improved robustness and comparable room-temperature gas-sensing characteristics.
研究领域:
材料科学
·
传感器技术
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2012
·
IF 3.832
Xiaolei Sun,Xinghui Wang,Li Qiao,Duokai Hu,Na Feng,Xiuwan Li,Yingqi Liu,Deyan He
Porous SnO 2 –Sn/C composites have been synthesized via directly pyrolysis of mixtures of SnO 2 powder and poly(vinylidene fluoride) without any surfactant addition and other treatment. The composites are composed of SnO 2 and Sn nanoparticles which are well encapsulated in porous carbon matrix as characterized by transmission electron microscopy, X-ray powder diffraction and micro-Raman spectrometer. The obtained materials were used as anode for lithium ion batteries, a discharge capacity of 1171 mAh g −1 and a charge capacity of 611 mAh g −1 were shown in the first cycle at a current density of 100 mA g −1 , and good cycling performance achieved even at current density as high as 800 mA g −1 . The good electrochemical behaviors could be attributed to the formation of Sn nanoparticles which can increase the reversible capacity and the porous carbon matrix which is of excellent buffering effect and high electronic conductivity.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
锂离子电池
✓ 已验证
DOI
高影响因子
SOLAR ENERGY
·
2026
·
IF 7.9
Qixin Chen,Zhongchen Bai,Xu Wang,Xinghua Li,Min Feng,Zhengping Zhang
An ultrathin Mg-doped SnO 2 layer reconstructs the ETL surface. • SnO 2 /Mg-doped SnO 2 bilayer regulates the ETL/CsPbBr 3 interface. • Improved morphology and charge transport enhance device performance. • The optimized device achieves 8.74% PCE and 90.69% retention after 50 days. Incomplete surface coverage, localized exposure of ITO protrusions, and interfacial nonuniformity in solution-processed SnO 2 electron transport layers (ETLs) restrict the performance of hole-transport-layer-free (HTL-free) CsPbBr 3 perovskite solar cells (PSCs). Herein, a planar homojunction SnO 2 /Mg-doped SnO 2 bilayer ETL was fabricated by depositing an ultrathin Mg-doped SnO 2 layer on the SnO 2 surface to regulate the ETL/perovskite interface in an ITO/SnO 2 /CsPbBr 3 /carbon device architecture. This bilayer configuration improves surface coverage, interfacial contact, and energy-level alignment while preserving lattice compatibility within the SnO 2 -based system. The Mg-doped SnO 2 top layer reduces surface cracks and pits, limits local ITO exposure, decreases roughness, and improves precursor wettability. These changes promote the formation of CsPbBr 3 films with larger grains, fewer pinholes, better vertical morphology, higher crystallinity, and a near-stoichiometric composition. The PL, TRPL, EIS, dark J–V, XPS, and UPS results collectively indicate improved interfacial charge extraction, reduced defect-assisted non-radiative recombination, and more improved energy-level alignment at the ETL/perovskite interface. Consequently, the optimized HTL-free device achieved a champion PCE of 8.74% with a Voc of 1.520 V and retained 90.69% of its initial efficiency after 50 days of unencapsulated storage in air. This work indicates that introducing an ultrathin Mg-doped SnO 2 overlayer effectively reconstructs the ETL surface and regulates the ETL/perovskite interface, providing an effective interfacial regulation strategy for developing efficient and stable HTL-free all-inorganic PSCs.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）