INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Kunjiao Li,Changcun Tang,Renzhi Xiong,Yanhe Xiao,Baochang Cheng,Shuijin Lei
The widespread application of dyes and heavy metals causes increasing environmental pollution. One effective way to mitigate environmental pollution is to use semiconductor photocatalysts for redox purification of pollutants. Heterostructured photocatalysts can reduce the electron–hole recombination rate and improve light utilization. In this work, a novel SnO2/In3–xS4 composite with oxygen vacancy defect-mediated Z-scheme heterostructure is constructed for the first time by a one-pot method, in which SnO2 ultrasmall nanocrystals are decorated on nanopetals of flower-like In3–xS4. Material analyses show that the as-built three-dimensional hierarchical architecture is able to essentially increase the specific surface area and thus the active sites of the products. More importantly, the formation of Z-scheme heterojunction between the oxygen vacancy-induced SnO2 defect level and the In3–xS4 band structure not only promotes the separation of photogenerated charges but also makes them more reactive. Through the optimization of the composition ratio between the two phases, the visible-light-driven photocatalytic reaction rates of rhodamine B degradation and Cr(VI) reduction for the developed SnO2/In3–xS4 composite photocatalyst are 12.8 and 6.3 times of bare In3–xS4 and 32.0 and 76.0 times of bare SnO2, respectively. This work should provide a promising implication for designing new high-performance composite photocatalysts.
研究领域:
环境科学
·
材料科学
·
光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Haibo Ye,Zhiyong Liu,Xingyue Liu,Bo Sun,Xianhua Tan,Yuxue Tu,Tielin Shi,Zirong Tang,Guanglan Liao
Organic-inorganic lead halide perovskite solar cells have garnered enormous interest in scientific communities due to comparable power conversion efficiencies and solution-processed fabrication techniques. Among them, carbon-based perovskite solar cells seem to be one of the most promising candidates for addressing the stability issue while suffering from inferior efficiency or high processing temperature. Herein, we introduce low-temperature processed Zn-doped SnO 2 (below 200 °C) as an effective electron transport layer in perovskite solar cells for the first time, and demonstrate a low-temperature carbon-based device with Cu-phthalocyanine as hole transport layer. We find that Zn doping contributes to a more suitable energy level alignment and an improved conductivity for SnO 2 films. As a result, the electron transfer and extraction are enhanced and the charge recombination is suppressed. In addition, devices with Zn-doped SnO 2 have a wider depletion region, leading to an enhanced photovoltaic performance . An optimal efficiency of 17.78% can be obtained after 2 mM Zn doping. Furthermore, these devices, introducing highly stable and hydrophobic Cu-phthalocyanine and carbon, maintain almost 100% of their initial efficiencies over 1200 h in ambient air. Our study paves the way for developing highly efficient and flexible carbon-based perovskite solar cells.
研究领域:
材料科学
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能源技术
·
光电转换
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Chengzhi Zhou,Yanping Wang,Jie Chen,Lei Xu,Haiming Huang,Junfeng Niu
Electrochemical degradation of antiviral drug abacavir was investigated by using a penetration flux porous Ti/SnO 2 –Sb anode prepared by sol-gel method. The effects of applied current density, initial pH, and inorganic anions on the degradation kinetics were systematically studied. Degradation efficiency more than 97% was performed in only 10 min at a current density of 0.2 mA cm −2 . The corresponding degradation rate constant and the lowest electrical energy per order were calculated to be 0.36 min −1 and 6.5 mWh L −1 , respectively. Extending the reaction duration to 5 h, 53.3% of TOC removal was observed. The results indicated that effective degradation of abacavir appeared in the penetration flux porous Ti/SnO 2 –Sb anode with a very low energy consumption. Furthermore, the electrochemical intermediate products and the reaction site during abacavir degradation were detected and recognized. The quantitative structure-activity relationship model revealed that the potential risks of abacavir to the aquatic organism, such as fish, greatly decreased after flowing through the penetration flux porous Ti/SnO 2 –Sb anode.
研究领域:
环境科学
·
药学
✓ 已验证
DOI
高影响因子
SENSORS
·
2025
·Vol. 25
·期 9
·2634
·
IF 3.5
Mengxue Xu,Yihong Zhong,Hongpeng Zhang,Yi Tao,Qingqing Shen,Shumin Zhang,Pingping Zhang,Xiaochun Hu,Xingqi Liu,Xuhui Sun,Zhenxing Cheng
HighlightsWhat are the main findings?The problem of dichloromethane “poisoned” MOS materials was well solved.Gas sensing mechanism of dichloromethane on the MOS material was elucidate.What is the implication of the main finding?The best performance of significant response and excellent recoverability by the MEMS sensor to dichloromethane is attributed to a synergetic effect from Mo and Ni co-doping into SnO2.Kinetically, the transportation of dichloromethane molecules onto the surface determines the response process. Thermodynamically, the output steady electronic signal of the MEMS sensor follows the equations newly derived by statistical mechanics.The challenging problem of chlorine “poisoning” SnO2for poorly recoverable detection of dichloromethane has been solved in this work. The materials synthesized by Ni or/and Mo doping SnO2were spread onto the micro-hotplates (<1 mm3) to fabricate the MEMS sensors with a low power consumption (<45 mW). The sensor based on Mo·Ni co-doped SnO2is evidenced to have the best sensing performance of significant response and recoverability to dichloromethane between 0.07 and 100 ppm at the optimized temperature of 310 °C, in comparison with other sensors in this work and the literature. It can be attributed to a synergetic effect of Mo·Ni co-doping into SnO2as being supported by characterization of geometrical and electronic structures. The sensing mechanism of dichloromethane on the material is investigated. In situ infrared spectroscopy (IR) peaks identify that the corresponding adsorbed species are too strong to desorb, although it has demonstrated a good recoverability of the material. A probable reason is the formation rates of the strongly adsorbed species are much slower than those of the weakly adsorbed species, which are difficult to form significant IR peaks but easy to desorb, thus enabling the material to recover. Theoretical analysis suggests that the response process is kinetically determined by molecular transport onto the surface due to the free convection from the concentration gradient during the redox reaction, and the output steady voltage thermodynamically follows the equation only formally identical to the Langmuir–Freundlich equation for physisorption but is newly derived from statistical mechanics.
研究领域:
材料科学
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传感器技术
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Dongmin An,Nan Liu,Hongfei Zhang,Qingfeng Sun,Cong Li,Yan Li,Qinglei Zhang,Yuqing Lu
A series of In 2 O 3 -SnO 2 nanocomposites were synthesized with a facile hydrothermal co-precipitation method and calcination after-treatment at 400 °C. The crystal phase structure, morphology, and elemental composition were characterized by X-ray powder diffraction and field emission scanning electron microscopy with energy dispersive spectroscopy. In 2 O 3 -SnO 2 nanocomposite-based gas sensors were fabricated, and their potential applications were assessed by testing gas-sensing properties systematically. The results exhibited that a small amount of In 2 O 3 dopant improved the dispersion and increased the specific surface area of SnO 2 nanomaterials. Besides, the gas response towards n-butanol gas was promoted and the working temperature was decreased by doping In 2 O 3 . In particular, the 1.5 %In 2 O 3 -SnO 2 nanocomposites-based sensor showed an excellent response of 76.5 towards 50 ppm n-butanol gas at 140 °C. The binding energies of the Sn 3d in nanocomposites varied with the changed doping dosage of In through XPS analysis. The enhanced n-butanol sensing performance of the fabricated In 2 O 3 -SnO 2 sensors at low operating temperature may be due to a synergistic effect between In 2 O 3 and SnO 2 .
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Caiyun Xu,Qi Li,Qiuyang Zhang,Kaijie Li,Hongfeng Yin,Shenghu Zhou
This work illustrates direct evidence of the formation of close-contact Rh-SnO2 heteroaggregate interfaces, and their enhanced catalytic hydrogenation performance is also demonstrated. Alumina-supported Rh-SnO2 heteroaggregate nanocatalysts were prepared by in situ transformation of Rh@Sn core–shell nanostructures. Various characterization techniques, especially the studies of high angle annular dark field scanning transition electron microscopy with phase mappings, confirm that Rh-SnO2 close-contact heteroaggragate nanostructures were obtained by in situ calcination and following reduction of Rh@Sn core–shell nanoparticle precursors. The catalytic studies for hydrogenations of various substituted nitroaromatics show that the Rh-SnO2/Al2O3 heteroaggregate nanocatalysts not only improve the catalytic conversions but also enhance the catalytic selectivity. The combination of characterization and catalytic studies suggests that a synergistic effect originated from close-contact Rh-SnO2 heteroaggregate interfaces exists in the Rh-SnO2 system, which enhances their catalytic hydrogenation performance.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Jiao Li,Pinggui Tang,Jiajun Zhang,Yongjun Feng,Ruixian Luo,Aifan Chen,Dianqing Li
A facile method to prepare SnO2 hollow microspheres has been developed by using SiO2 microspheres as template and Na2SnO3 as tin resource. The obtained SnO2 hollow microspheres were characterized by X-ray diffraction, scanning electron microscopy, high resolution and transmission electron microscopy, and Brunauer–Emmett–Teller analysis, and their sensing performance was also investigated. It was found that the diameter of SnO2 hollow microspheres can be easily controlled in the range of 200–700 nm, and the shell thickness can be tuned from 7.65 to 30.33 nm. The sensing tests showed that SnO2 hollow microspheres not only have high sensing response and excellent selectivity to acetone, but also exhibit low operating temperature and rapid response and recovery due to the small crystal size and thin shell structure of the hollow microspheres, which facilitate the adsorption, diffusion, and reaction of gases on the surface of SnO2 nanoparticles. Therefore, the SnO2 hollow microsphere is a promising material for the preparation of high-performance gas sensors.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·
IF 5.8
Li Yang,Ma Hairun,Li Qianwei,Yan Guangxu,Guo Shaohui
Ti/SnO 2 -Sb electrodes possess high catalytic activity and efficiently degrade nitrobenzene (NB); however, their low service life limits their wide application. In this study, we used one-step hydrothermal synthesis to successfully prepare Pt-Nd co-doped Ti/SnO 2 -Sb nanosphere electrodes. Scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were applied to characterize the surface morphology, microstructure, and chemical composition of the electrodes, respectively. The electrochemical activity and stability of the electrodes were characterized via linear sweep and cyclic voltammetry, electrochemical impedance spectroscopy, and an accelerated service life test; their performance for NB degradation was also studied. An appropriate amount of Pt-Nd co-doping refined the average grain size of SnO 2 and formed a uniform and compact coating on the electrode surface. The oxygen evolution potential, total voltammetric charge, and electron transfer resistance of the Ti/SnO 2 -Sb-Nd-Pt electrodes were 1.88 V, 3.77 mC/cm 2 , and 11.50 Ω, respectively. Hydroxy radical was the main active radical species during the electrolytic degradation of nitrobenzene with Ti/SnO 2 -Sb-Nd-Pt. After Pt-Nd co-doping, the accelerated service life of the electrodes was extended from 8.0 min to 78.2 h (500 mA/cm 2 ); although the NB degradation rate decreased from 94.1 to 80.6%, the total amount of theoretical catalytic degradation of NB in the effective working time increased from 17.4 to 8754.1 mg/cm 2 . These findings reveal good application potential for the electrodes and provide a reference for developing efficient and stable electrode materials.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 8
·1163
·
IF 4.034
Xi-Tao Yin,Davoud Dastan,Fa-Yu Wu,Jing Li
Here SnO2/LaFeO3−XNXcomposite was fabricated using a wet chemical method and was applied to pollutants degradation and gas sensing for the first time. The composite exhibits high performance for photocatalytic degradation of Rhodamine B (RhB) dye and selectivity sensing of various gases. On the basis of the completed experiments, the improved RhB degradation and selective gas sensing performance resulted from the extended optical absorption via N2incorporated surface states and enhanced charge separation via coupling SnO2. Using the scavengers trapping experiments, the superoxide radical (O2•−) was investigated as the major scavenger involved in the degradation of RhB over SnO2/LaFeO3−XNXcomposite. In this paper, the probable reaction steps involved in the RhB dye degradation over SnO2/LaFeO3−XNXcomposite are proposed. This work will provide reasonable strategies to fabricate LaFeO3-based proficient and stable catalysts for environmental purification. In addition, the result of the selectivity of gas performance is also presented.Keywords:LaFeO3−XNX;RhB degradation;charge separation;gas sensing
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 8
·期 5
·2001831
·
IF 4.948
Peng Wang,Su-Zhen Wang,Qing Han,Dong-Qinq Zou,Wen-Kai Zhao,Xue-Dong Wang,Chen Luo,Xin Yang,Xing Wu,Wan-Feng Xie
Gas sensors based on SnO 2 , Fe 2 O 3 , and their nanocomposites are promising candidates for sensing of acetone, ethanol, hydrogen, NO 2 , ozone, and formaldehyde. In this work, a rational hydrothermal route is designed to prepare α-Fe 2 O 3 /SnO 2 porous sphere arrays assembled with hierarchical nanostructure (denoted as α-Fe 2 O 3 ( x %)/SnO 2 ). The results demonstrate that the α-Fe 2 O 3 (4%)/SnO 2 based sensor exhibits excellent sensing performance, the short response/recovery time of 3 and 4 s, respectively. A very low working temperature of 200 °C, wide linear detection range (from 500 ppb to 500 ppm), and long-term cycling stability of as long as 90 days, and stable performance at 80% of relative humidity. The sensing signals can be accurately sampled and processed by the integrated circuit system, to collect and monitor the acetone concentration alteration signals in real time. Furthermore, the gas sensing performance is interpreted by the functions of hierarchical nanostructure and synergistic effect of Fe 2 O 3 /SnO 2 nanohybrids.
研究领域:
材料科学
·
传感器技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2020
·
IF 3.085
Qinghao Zeng,Yanfa Cui,Lianfeng Zhu,Youwei Yao
Partially reduced SnO 2 was prepared by using NaBH 4 as reducer under room temperature. After NaBH 4 treatment, the oxygen vacancy density of SnO 2 was increased greatly. X-ray photoelectron spectroscopy, photoluminescence and electron paramagnetic resonance indicates that the obtained materials are characteristic of a high concentration of oxygen vacancies. Owing to increased oxygen vacancy concentration, these materials showed significantly high gas-sensing response to ethanol. Compared with the ethanol-sensing response value of 36.9 for pristine SnO 2 towards 300 ppm ethanol, the response value for the partially reduced SnO 2 is 120.3. This ethanol-sensing response enhancement may be attributed to the fact that the increased surface oxygen vacancy facilitates oxygen adsorption, and promotes chemical reaction on the surface.
研究领域:
材料科学
·
化学工程
·
传感器与执行器
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Yahong Xie,Ke Zhao,Haobin Wang,Ying Qi,Peng Wei,Jian Cheng
SnO2 is considered as a promising electron transport material for carbon-based perovskite solar cells (C-PSCs) due to its excellent electron mobility, stability over TiO2, and low-temperature processing. However, the lattice mismatch and poor contact quality of the SnO2/CH3NH3PbI3 interface, as well as oxygen vacancies, usually lead to nonradiative recombination and limit the further improvement of photovoltaic performance. In this paper, two chitosan derivatives, chitosan quaternary ammonium salt (HACC) and carboxymethyl chitosan (CMCS), were used as additives for SnO2 to adjust the energy level and improve the contact performance of the SnO2/CH3NH3PbI3 interface. These two additives have suitable terminal active functional groups, amino group and hydroxyl group, which can interact with SnO2 and CH3NH3PbI3 at the interface, induce the crystal growth of the perovskite, and play a good role in passivating interfacial defects. Therefore, the interfacial contact and the charge-transfer ability were effectively enhanced. As a result, the addition of HACC and CMCS increased the PCE of C-PSCs from 10.17 to 12.42 and 13.39%, and the repeatability and long-term stability of the corresponding unencapsulated C-PSCs were also significantly improved. This work expands the vision for the future interface modification strategies to improve the device performance and is conducive to promote the further commercialization of C-PSCs.
研究领域:
材料科学
·
可再生能源
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）