Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Pengshan Guo,Dongmei Yu,Chuntao Zhao,Jianping Wang,Ji Cheng,Wenxuan Fan,Tongtong Ma,Tian Gao,Jinghua Li
The increasing demand for potash has led to the increased use of 4-dodecyl morpholine (DMP), an important froth flotation agent for the extraction for potash extraction by “reverse flotation-cold crystallization”. As it is not easy to be stable and decompose in its natural state, it has seriously endangered the environment of salt lakes and the development of salt lake resources. The development of a safe and harmless catalytic system to accomplish the degradation and removal of DMP is urgent. Herein, A Cu 2 O/SnO 2 /PDA (CSP) nanoparticle with a synergistic effect of photocatalysis and Fenton-like catalysis was developed, and the CSP had a good photothermal conversion efficiency. Under 808 nm NIR irradiation, not only the catalyst activity was enhanced, but also the complexation rate of electron-hole pairs was reduced, which effectively increased the degradation efficiency of DMP (an increase of about 31.56 %). In addition, by analyzing the degradation products of DMP, the possible pathways of the DMP degradation process were proposed and, at the same time, the degradation catalytic system we used was proved to be safe and harmless. A new pathway is provided for the degradation and removal of DMP in the salt lake environment.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2024
·
IF 0
Li Danni,Guo Xin,Shao Xiang,Zhou Anhui,Zhu Lin,Zhang Yuting,Li Binbin,Du Yan,Cao Limei,Yang Ji
The electrochemical advanced oxidation process (EAOP) has shown significant promise in the field of refractory organic wastewater treatment due to its high efficiency and environmentally friendly nature. In this study, Ti/Sb-SnO 2 electrodes with varying proportions of Hf were prepared using the sol–gel method. The addition of Hf transformed the original collapsing and broken surface into a flat and regular surface. The results demonstrated that Ti/Sb-SnO 2 -Hf electrode doped with 6% Hf exhibited a higher oxygen evolution potential (OEP) and excellent stability. The OEP increased from 2.315 V without Hf-doping to 2.482 V, and the corresponding actual life was 321.05% higher than that without Hf. The current density (5–40 mA·cm −2 ), electrolyte concentration (0.02–0.2 mol·L −1 ), pH (3–11), and initial pollutant concentration (5–80 mg·L −1 ) were evaluated to confirm the tetracycline (TC) degradation characterization of Ti/Sb-SnO 2 -6%Hf electrodes. It was concluded that under the optimal degradation conditions, the removal rate of TC could reach 99.66% within 2 h. The degradation of TC follows first-order reaction kinetics. The oxidative degradation of TC was achieved through indirect oxidation, with ·OH playing a dominant role. TC’s electrochemical oxidation degradation pathway has been proposed: Based on LC–MS results, three main pathways are speculated. During the electrocatalytic oxidation process, decarboxylation, deamidation, and ring-opening reactions occur under ·OH attack, producing intermediate compounds with m/z values of 427, 433, 350, 246, 461, 424, 330, 352, 309, 263, and 233. These intermediates are further oxidized to intermediate compounds with an m/z value of 218. This work introduces a new efficient anode electrochemical catalyst for the degradation of TC, providing a strategy for industrial applications.
研究领域:
环境科学
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材料科学
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DOI
PubMed
CERAMICS INTERNATIONAL
·
2020
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IF 3.83
Minjia Wang,Jinchao Bu,Yang Xu,Yuan Liu,Yunfang Yang
Antimony doped Tin Oxide (ATO) hollow submicron spheres were synthesized with a carbon ball template using the hydrothermal method , and compared to commercial nano-ATOs that differed in particle size. To study the thermal insulation performance and the mechanism of different ATOs, their morphology, crystalline structure and microstructure were examined using XRD, SEM and HRTEM. Meanwhile, the optical and thermal characteristics of the different ATOs, including absorption, reflectance, thermal conductivity , infrared emissivity (8–14 μm), and specific heat capacity, were also measured. Silicone acrylic emulsion coatings containing different dosages of ATO were then prepared, and their UV–Vis–NIR transmittance and solar heat shielding performances were tested. ATO hollow submicron spheres showed a thermal insulation performance comparable to that of nano-ATO, but their main respective thermal insulation mechanism was different. ATO hollow submicron spheres primarily relied on better particle dispersion, lower thermal conductivity, higher specific heat capacity and higher infrared emissivity. The 50 nm ATO absorbed the least solar heat but reflected the most light, while 100 nm ATO showed the opposite behavior. Both nano-ATOs had better transmittance in the visible light range but relatively low transmittance in the ultraviolet and infrared range. The results of this study indicate that ATO hollow submicron spheres are promising materials equivalent to nano-spheres that can be applied as a coating for energy conservation.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
ELECTROCHIMICA ACTA
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2020
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IF 6.215
Meilian Cao,Wanli Cheng,Xiaohui Ni,Yi Hu,Guangping Han
The lignin-based multi-channels carbon nanofibers (MCNFs) @ SnO 2 nanocomposites with various microstructures are synthesized via co-electrospinning by regarding Poly (vinyl pyrrolidone) (PVP)–SnCl 2 ·2H 2 O as shell materials and lignin-Poly (methyl methacrylate) (PMMA) at different mass ratios as core materials, followed by heat treatment and acid treatment. The experimental results show that when the mass ration of lignin to PMMA in the core region is 5:5, the obtained nanocomposites possess hierarchical internal channels, porous surface, and high specific surface area. This optimized nanocomposite as supercapacitor electrode shows high specific capacitance of 406 F g −1 at current density of 0.5 A g −1 . In addition, the electrode exhibits unexceptionable cycling stability with only 5% capacitance decay over 10 000 cycles at 10 A g −1 . Furthermore, the symmetric supercapacitor using the optimized nanocomposites as electrodes possesses remarkable power and energy densities. The superior electrochemical performance of nanocomposites is benefited from the hierarchical structures of MCNFs, faradaic pseudocapacitance of SnO 2 , and pore-forming effect of SnCl 2 ·2H 2 O. The unique hierarchical nanocomposites show great potential in future development of lignin-based low-cost, non-toxic and eco-friendly carbon materials for high-performance energy storage devices.
研究领域:
材料科学
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能源存储技术
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DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2017
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IF 4.421
Changchao Jia,Hsueh-Shih Chen,Ping Yang
Hollow waxberry-like rutile- and anatase-TiO 2 /SnO 2 (TiO 2 @SnO 2 ) hierarchical architecture was fabricated for efficient photocatalysis . A Topotactic synthetic method, including the synthesis of CaTiO 3 /CaSnO 3 precursors and subsequent transformation into TiO 2 @SnO 2 , was used. Rutile TiO 2 nanorods nearly radial alignment grow on the external surface of the hollow sphere composed of anatase TiO 2 and SnO 2 nanoparticles . Because the hollow hierarchical structure enhances light harvesting ability and the tightly connected interface among different components improves the electron transfer efficiently, a waxberry-like TiO 2 @SnO 2 -5% sample with appropriate phase composition exhibits excellent photocatalytic performance. The sample behaved superior cycle stability.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2019
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IF 4.63
Aili Liu,Mingyuan Zhu,Bin Dai
The catalyst SnO 2 was prepared by a precipitation method, and then aged and calcined at the optimal temperature of 673 K. The reaction conditions were optimized and the oxidation desulfurization efficiency of the obtained catalyst were evaluated. The sulfur removal rate was 99.8% at the optimum reaction conditions of 0.08 g catalyst, 333 K, O/S = 10, 2 h. The catalytic site in the ODS process of the SnO 2 catalyst may be Sn 4+ /Sn 2+ Lewis acids. Furthermore, no significant catalytic performance decrease was observed over 14 reuse cycles. The excellent activity and reusability of the catalyst was attributed to the beneficial effects upon specific surface area and acidic-site strength of the appropriate heat treatment temperature.
研究领域:
催化化学
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环境科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2019
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IF 8.456
Ershuai Jiang,Yuqian Ai,Jin Yan,Nan Li,Liujin Lin,Zenggui Wang,Chunhui Shou,Baojie Yan,Yuheng Zeng,Jiang Sheng,Jichun Ye
Tin oxide (SnO2) is widely used in perovskite solar cells (PSCs) as an electron transport layer (ETL) material. However, its high surface trap density has already become a strong factor limiting PSC development. In this work, phosphoric acid is adopted to eliminate the SnO2 surface dangling bonds to increase electron collection efficiency. The phosphorus mainly exists at the boundaries in the form of chained phosphate groups, bonding with which more than 47.9% of Sn dangling bonds are eliminated. The reduction of surface trap states depresses the electron transport barriers, thus the electron mobility increases about 3 times when the concentration of phosphoric acid is optimized with 7.4 atom % in the SnO2 precursor. Furthermore, the stability of the perovskite layer deposited on the phosphate-passivated SnO2 (P-SnO2) ETL is gradually improved with an increase of the concentration. Due to the higher electron collection efficiency, the P-SnO2 ETLs can dramatically promote the power conversion efficiency (PCE) of the PSCs. As a result, the champion PSC has a PCE of 21.02%. Therefore, it has been proved that this simple method is efficient to improve the quality of ETL for high-performance PSCs.
研究领域:
材料科学
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能源技术
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光伏器件
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产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
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2020
·Vol. 7
·期 4
·1901866
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IF 4.948
Qiyun Wang,Changtao Peng,Lin Du,Haijin Li,Wenfeng Zhang,Jiale Xie,Hongchang Qi,Yuepeng Li,Liuwen Tian,Yuelong Huang
Perovskite solar cells (PSCs) based on planar SnO 2 (p-SnO 2 ) demonstrate excellent performance due to the superior properties of SnO 2 as electron transporting layer (ETL). However, at present mesoporous SnO 2 (m-SnO 2 ) still lags behind p-SnO 2 due to problems in the fabrication process of m-SnO 2 . In this paper, a new strategy for preparing m-SnO 2 ETL is introduced which owns two valuable features: First, it applies a low temperature process to make mesoporous structure, which favors preserving the pristine properties of the raw SnO 2 nanocrystals. Second, the degree of porosity and roughness of the m-SnO 2 layer can be well controlled, making it friendly to the following deposition process of PSCs. The performance of the PSCs based on the m-SnO 2 ETL prepared from this strategy shows an obvious improvement which is mainly from the improvement in J sc and FF, suggesting a higher carrier collection efficiency for the m-SnO 2 ETL. The relevant characterizations including PL, TRPL, EIS, and KPFM confirm that the m-SnO 2 ETL possesses stronger electron extraction capability than the p-SnO 2 ETL. Hence, the proposed strategy can manifest the advantages of m-SnO 2 ETL meanwhile refrain its negative impacts, and thus promote the progress of the m-SnO 2 ETL-based PSCs.
研究领域:
材料科学
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能源技术
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光电转换
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高影响因子
JOURNAL OF POWER SOURCES
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2012
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IF 4.951
Haiting Lu,Yang Fan,Ping Huang,Dongli Xu
SnO 2 nanospheres were employed as the support material for Pd catalyst. The as-prepared Pd/SnO 2 catalyst exhibited remarkably improved electrocatalytic activity and stability towards formic acid oxidation , in comparison with that of the Vulcan XC-72 carbon black and the commercial SnO 2 nanopowder supported Pd catalyst. The enhanced catalytic performance may arise from the unique structure and surface properties of the SnO 2 nanospheres, which process extraordinary promotional effect on Pd catalyst.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
ELECTROCHIMICA ACTA
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2012
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IF 3.832
Yang Fan,Jinhang Liu,Haiting Lu,Ping Huang,Dongli Xu
Hierarchical structure SnO 2 with two-dimensional (2D) nanosheets building blocks was employed as support material for Pt nanoparticles (NPs). The SnO 2 supported Pt catalyst was synthesized through a facile aqueous phase process using sodium borohydride as the reducing agent. The as-prepared Pt–SnO 2 catalyst exhibited remarkably improved electrocatalytic activity and stability toward methanol oxidation , in comparison with that of the commercial Pt/C catalyst and the commercial SnO 2 nanopowder supported Pt catalyst. The superior catalytic performance may arise from the unique multiscale structure and morphology of the SnO 2 support, which process extraordinary promotional effect on Pt catalyst.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 32
·15267-15275
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IF 4.682
Huang Yong,Chen Feng,Meng Lingyao,Hu Yongming,Chen Wanping
Room temperature gas-sensitive metal oxides have received growing concern over their long-term stability in recent years. Presently, Pt-SnO 2 composite nanoceramics of 1 wt% Pt have been prepared, and the time dependence of their room temperature hydrogen sensing capability has been carefully studied. A strong variation with time was observed, with the room temperature response to 1% H 2− 20% O 2 –N2 decreased by a factor of several dozen after only one week. Heat treatments were found highly effective to activate those aged samples. Their room temperature hydrogen sensing capability was almost completely restored through 10 min heat treatments at temperatures as low as 130 °C. It is proposed that impurity gases in air slowly deposit on Pt in Pt–SnO 2 composite nanoceramics, and the catalytic role of Pt is deactivated by the deposition and then activated after their desorption through heat treatments. These results suggest that periodic mild heat treatments can be a simple and feasible way for some room temperature gas-sensitive metal oxides to maintain a high long-term stability.
研究领域:
材料科学
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传感器技术
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DOI
高影响因子
Nanoscale
·
2014
·Vol. 6
·期 12
·6315-6321
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IF 6.739
Qingming Shen,Jingyi Jiang,Shilei Liu,Li Han,Xiaohui Fan,Mengxing Fan,Quli Fan,Lianhui Wang,Wei Huang
Au–SnO2 hybrid nanospheres (HNSs) were synthesized by a facile, one-step method, which was achieved via a redox reaction between the reductive stannous (II) ions and oxidative auric (III) ions and dissolved O2, and then in situ formation of Au nanoparticles (NPs) and SnO2 NPs. The results indicated that the Au NPs are able to trap electrons, improve the electron–hole pairs' life, and enhance the visible light absorption intensity that are all beneficial for enhancement of the visible light photoelectrochemical performance. Cysteine was chosen as a model molecule in photoelectrochemical biosensing experiments. The biosensor displayed excellent analytical performance for detection of cysteine with an extremely broad linear range (from 0.4 μM to 12 mM), and a low detection limit (0.1 μM). Therefore, the Au–SnO2 HNSs will be promising candidates for photocatalysts, photoelectrochemical biosensors, and other photoelectric devices.
研究领域:
材料科学
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生物传感技术
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光电化学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）