SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
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IF 8.2
Weikang Zheng,Zhenzhong Liu,Boyan Wang,Meijun Tao,Hongliang Ji,Xiaofang Xiang,Zhengguo Fu,Lili Liao,Peng Liao,Ronglong Chen
Microplastics have been identified as an emerging pollutant that poses a risk to the aquatic environment, and it is a challenge to find a suitable removal process. Electrocatalytic oxidation (ECO) technology has shown promising performance in removing various persistent organic pollutants. In this study, we prepared a new anode for removing polystyrene microplastics (PS MPs) by ECO. Ti/La-Sb-SnO 2 electrodes doped with the rare earth element La as the active layer were synthesized to enhance the electrocatalytic activity. The lifespan of the electrode was improved by doping Mn, Co, or Ru as an intermediate layer modification between the titanium (Ti) substrate and the La-Sb-SnO 2 active layer, respectively. The experimental results indicated that the addition of three types of intermediate layers led to different degrees of decrease in the catalytic activity of the electrode and the degradation performance of PS MPs. The addition of the Co intermediate layer had a negligible effect on the catalytic activity and performance of the Ti/La-Sb-SnO 2 anode for PS degradation. In addition, the electrode lifespan with Co intermediate layer was significantly prolonged, which was 4.54, 2.38, and 1.19 times higher than the electrode without intermediate layer and the electrode with Ru and Mn intermediate layer, respectively. Therefore, Co was determined to be the optimal choice as the intermediate layer, and the production technique for the Ti/La/Co-Sb-SnO 2 anodes was carefully adjusted. The degradation efficiency of PS MPs was optimized at a heat treatment temperature of 400 °C and a Sn: Co material ratio of 5:1, with a removal rate of 28.0 %. The ECO treatment also resulted in more pronounced changes in the structure and functional groups of the MPs. Various alkyl cleavage and oxidation products were detected after the treatment, suggesting that the oxidant (hydroxyl radicals) strongly interacted with the MPs, leading to their degradation. Overall, this work provided a new insight into removing MPs in water through the use of modified electrodes.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Daxue Du,Dezhao Zhang,Hong Liu,Wenzhong Shen
The bilayered electron transport layer (ETL) has made significant contributions to enhancing the photovoltaic performance for perovskite solar cells. However, it is generally required to prepare the TiO 2 at a high temperature before adding the SnO 2 layer due to the difference in temperature tolerance, resulting in energy consumption and hampering electron transfer. To address this issue, we proposed a simple low-temperature process based on TiO 2 @SnO 2 nanocrystals for bilayered ETL. The introduction of SnO 2 enhances the Fermi level and lowers the valence band position of TiO 2 nanocrystals, which facilitates electron extraction and hole blocking, leading to the enhancement of open circuit voltage and fill factor. Additionally, TiO 2 @SnO 2 nanocrystals provide a more suitable refractive index and less parasitic absorption than TiO 2 , these optical gains forming a higher short-circuit current. As a result, the champion efficiency of the perovskite solar cell was significantly raised from 16.17% to 19.04% along with enhancement in the stability and hysteresis phenomena. Moreover, photovoltaic performance can be further increased by combining perovskite component engineering and interfacial passivation because of the high compatibility of TiO 2 @SnO 2 ETL.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2013
·Vol. 15
·期 21
·8228-8236
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IF 3.829
Shaofeng Zhang,Feng Ren,Wei Wu,Juan Zhou,Xiangheng Xiao,Lingling Sun,Ying Liu,Changzhong Jiang
Composite materials containing different components with well-defined structures may cooperatively enhance their performance and extend their applications. In this work, core–shell γ-Fe2O3@SnO2 hollow nanoparticles (NPs) were synthesized by a low-cost and environmentally friendly seed-mediated hydrothermal method. Firstly, the γ-Fe2O3 hollow NPs were synthesized by a template-free method. Then they were used as the cores for the growth of SnO2 shells. The thickness of the shell can be simply tailored by controlling the reaction time. Various techniques, including SEM, XRD, TEM and HRTEM, were employed to investigate the morphology, structure and formation process of the special core–shell hollow structures. The combination of magnetic semiconductor (γ-Fe2O3) and wide band-gap semiconductor (SnO2) endowed them with great potential to be used as recyclable photocatalysts. Experiments on photo-degradation of Rhodamin B (RhB) dye in the presence of the samples showed that the hybrid structures possessed higher photocatalytic activities than the monomer structures of SnO2 and γ-Fe2O3 materials indicating a strong coupling enhancement effect between the wide and narrow band-gap semiconductors. Moreover, the gas sensing tests of the γ-Fe2O3@SnO2 hollow NPs revealed that the samples exhibited fast response and recovery rates, which enable them to be promising materials for gas sensors.
研究领域:
材料科学
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环境科学
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纳米技术
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DOI
高影响因子
Catalysts
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2025
·Vol. 15
·期 3
·255
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IF 4
Changhui Zhu,Xudong Zhang,Wenling Xu,Yanni Zheng,Baohe Tian,Xi Chen,Wenchao Zhu
To overcome the limitations of conventional catalysts in sterically hindered esterification reactions, a radio frequency (RF) plasma-modifiedSO42−/S2O82−/SnO2-Al2O₃ solid superacid catalyst was synthesized via sol-gel and impregnation, followed by RF plasma treatment and calcination. Comprehensive characterization revealed that the RF plasma modification endowed the catalyst with a uniform particle distribution (4.32 nm average size), larger specific surface area (104.44 m2·g−1), elevated total acid content (142.86 μmol·g−1), and increased oxygen vacancy concentration (16.4%), compared to the conventional sol-gel–impregnation–calcination-prepared catalyst. The RF plasma-modifiedSO42−-S2O82−/SnO2-Al2O3was subsequently applied to perform the esterification reaction of Tyr, with a higher steric hindrance. Mechanistic studies indicated that the plasma-induced surface etching and electronic redistribution/intensified electron-withdrawing capability ofSO42−/S2O82−groups synergistically strengthened Brønsted/Lewis acidity. For the esterification of tyrosine—a sterically demanding substrate—the modified catalyst achieved a 92.1% methyl tyrosine yield under the optimized conditions (180 °C, 0.8 MPa N2, 6 h), where the catalyst exhibited a better mechanical strength and better lifetime with five cycles. This work not only provides a scalable plasma-assisted strategy for tuning solid superacids but also establishes an eco-friendly alternative to traditional catalysts, and was applied to the esterification reactions of some high-steric-hindrance substrates.
研究领域:
催化化学
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生物有机化学
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产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2023
·
IF 3.2
Liming Chen,Bin Tang,Haoyue Li,Bohan Wang,Bin Huang
Microstructure design and constructing heterojunctions are of great value for transition metal oxides to realize a high-performance electrode for lithium-ion batteries (LIBs). In this paper, monodisperse porous SnO 2 /Co 3 O 4 nanocubes anchored onto graphene is fabricated. The SnO 2 and Co 3 O 4 phases in the composite are detected by X-ray diffraction. Scanning electron microscopy and transmission electron microscopy are employed to gain insight into the microstructure of the nanocubes, which are composed of tightly contacted SnO 2 and Co 3 O 4 particles with a size range from 100 to 200 nm. X-ray photoelectron spectroscopy reveals that SnO 2 and Co 3 O 4 are chemically bound together. Four samples of pure SnO 2 , pure Co 3 O 4 , SnO 2 /Co 3 O 4 nanocubes, and SnO 2 /Co 3 O 4 /rGO composite are compared in electrochemical properties . The excellent rate performance, cycling stability, and reversible specific capacity result from the synergistic effect of the unique microstructure and the function of the high conductive graphene framework in Li ion storage.
研究领域:
材料科学
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电化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2022
·
IF 5.477
Zhenzhen Yu,Ruowen Liang,Man Zhou,Kai Yang,Ping Mu,Kangqiang Lu,Weiya Huang,Shaobo Ouyang,Zhengquan Li,Changlin Yu
Background The antibiotic and dyes disposals are the promising strategy for the persistent environmental problems. For the photocatalytic process, charge separation and transfer are the key issue, in which its rate should be faster than that of the recombination to participate into the chemical reactions. Methods In this work, we exploited the Cu, Yb co-doped SnO 2 via one-step hydrothermal method. The enhanced charge transfer rate was characterized by XPS, photocurrent, electrochemical impedance spectra, photoluminescence and EPR measurements. Significant findings Benefiting from higher charge transfer rate, co-doping of Cu and Yb into SnO 2 could achieve superior photocatalytic activities for the degradations of dyes and tetracycline. The result confirmed that the introductions of Cu and Yb could redistribute the photo-induced carriers on the surface of SnO 2 . In addition, the photogenerated electrons were captured by the defective sites, and thus it facilitated the efficient charge transfer over SnO 2 .
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 41
·期 17
·9321-9329
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IF 3.269
Nadeem Muhammad,Weixia Li,Qamar Subhani,Fenglian Wang,Yong-Gang Zhao,Yan Zhu
The aim of this novel study was to introduce a cheap, simple, sensitive, and green methodology involving the dual application of synthesized porous SnO2 nanoparticles (NPs) for selective conversion of non-fluorescent ketoprofen (KP) into a highly fluorescent species and as a sorbent in a μ-sample preparation method for extraction of KP from the three complex human serum, urine, and canal water samples. The clean separation and sensitive fluorescence determination of KP from these complex samples were carried out by coupling an ion chromatograph with a fluorescence detector (IC-FLD). The sorbent was prepared by a simple chemical precipitation method in water and characterized via various techniques. The porous SnO2 NPs, in addition to their role in the selective conversion of KP into a highly fluorescent species, also act as an effective sorbent for the selective degradation and elimination of polar organics, inorganic matrices, and heavy metals in complex samples. The optimized analytical method exhibited satisfactory linearity for ketoprofen in the concentration range of 0.2–1.5 mg kg−1 with a correlation coefficient (r2) of 0.997. The limit of detection (LOD) and quantification (LOQ) in human serum, urine, and canal water samples were 0.1 μg kg−1, 0.5 μg kg−1, and 0.39 μg kg−1 and 1.3 μg kg−1, 0.3 μg kg−1, and 1.7 μg kg−1, respectively. The method also showed good intra-day and inter-day precisions at the two concentration levels of 0.5 mg kg−1 and 1.3 mg kg−1 in complex samples with the relative standard deviations (RSDs) less than 16.3% (n = 5), and satisfactory recoveries were retrieved in the range of 85.1–101.4% with minimum or no matrix effect.
研究领域:
分析化学
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环境科学
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药物分析
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DOI
高影响因子
OPTICAL MATERIALS
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2023
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IF 3.9
Vu Hoang Huong,Van-Can Nguyen,Minh Ngoc Ha,Duy Van Pham,Thanh Binh Nguyen,Yuan-Ron Ma,An Bang Ngac,Trinh Thi Loan
The photo-Fenton process serves as a highly efficient approach for removing contaminants from wastewater. In this study, we developed a Fe-doped TiO 2 /SnO 2 heterojunction catalyst to enhance the efficiency of photo-Fenton catalytic activity under visible light . To investigate the physical properties of the catalysts, various characterization techniques were utilized, including XRD , SEM, TEM , HR-TEM, UV-VIS, PL , and XPS . The 7% mol Fe-doped TiO 2 /SnO 2 -OVs (TFS-7) heterostructure exhibited the highest rate constant of 17.03 × 10 −3 min −1 ; 8.4 and 2.1 times higher than the individual components. This enhanced performance is mainly attributed to the rapid migration of photoinduced electrons to Fe 3+ and the subsequent generation of Fe 2+ , which improved electron transfer capacity and facilitated the rapid production of hydroxyl radicals (•OH) through the reaction between Fe 2+ and H 2 O 2 . We proposed a S-scheme mechanism for the Fe-doped TiO 2 /SnO 2 -OVs catalyst based on the analysis of reactive species trapping experiments, photoluminescence (PL) spectra, ultraviolet photoelectron spectroscopy (UPS), and density functional theory (DFT). These findings offer not only a straightforward approach for synthesizing highly active photocatalysts for the degradation of RhB dye, but also a framework for the construction of heterostructure photocatalysts.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
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2022
·Vol. 12
·期 23
·14631-14638
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IF 4.036
Dixin Liu,Wenyuan Zhang,Ziqiu Ren,Xin Li
To date, most preparation processes of polycrystalline perovskite films still have to be performed in a glovebox filled with inert gas, limiting the application due to their high cost and complexity. In this work, we exploit a facile processing technique for the preparation of perovskite solar cells (PSCs) under ambient conditions by the Yb3+ doping effect for SnO2 electron transfer layer. This remarkable and facile interface doping strategy promotes all-air processed planar PSCs, giving enhanced power conversion efficiency (PCE) from 15.69% to 17.31% with a decreasing hysteresis effect. Moreover, the heating and illumination stability of modified devices by virtue of defect suppression located at electron transfer layer (ETL)/perovskite interface has been effectively improved, retaining over 85% of its initial PCE after 7 h heating at 100 °C in ambient condition and 85% of its initial PCE under 7 h continuous light illumination without any encapsulation. Therefore, it is believed that this Yb-doping strategy for SnO2 ETL can provide a novel way of promoting the efficiency and stability of devices prepared in the air.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Ao Shen,Zhichen Shi,Wenyuan Zhang,Yi Zhai,Yongbao Feng,Wenbin Gong,Peng Xu,Qiulong Li
Tin-based compounds have an ultrahigh theoretical capacity and low oxidation-reduction potential, making them as a very important type of anode matrix for lithium-ion batteries (LIBs). Nevertheless, the enormous volume dilatation causes structural collapse, limiting its cyclic stability. Herein, a nanoscale SnO 2 /SnSe 2 @rGO has been designed, in which the interface of SnO 2 /SnSe 2 heterostructure generates a built-in electric field, improving charge transfer efficiency. And rGO, as a 3D interconnection network coating SnO 2 /SnSe 2 nanoparticles, improves conductivity and serves as a buffer medium for volume expansion. DFT calculations confirm that the formation of built-in electric field enhances the adsorption energy of Li + and reduces the migration energy barrier. As expected, the initial capacity of the SnO 2 /SnSe 2 @rGO electrode can reach 1405.9 mAh g −1 at 2.0 A g −1 . The reversible capacity is 1459.1 mAh g −1 at 0.1 A g −1 after 50 cycles, with 78.1 % capacity retention. Finally, a SnO 2 /SnSe 2 @rGO//LiFePO 4 (LFP) full battery was assembled, which exhibits a high capacity of 213.1 mAh g −1 at 0.1 A g −1 and energy density of 492.8 Wh kg −1 at 270 W kg −1 . The design of this nanoscale heterostructure provides a feasible strategy for developing LIBs anodes with enhanced capacity and extended lifespan.
研究领域:
材料科学
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电化学
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纳米技术
·
储能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Jian Fang,Xi Chen,Rong-Pu Xiao,Jing-Jing Xue,Ji-Ming Song
Metal-organic framework (MOF) can be used as sacrificial templates for preparing metal oxides with unique hollow structures. The heterojunction formed between two metal oxides is conducive to improvement of gas sensor performance. Herein, MOF compounds containing In with hexagonal prism morphology were synthesized first, and then annealed to obtain uniform hexagonal In 2 O 3 hollow microtubes. Subsequently, the surface of In 2 O 3 hollow microtubes was decorated by the Pr-doped SnO 2 nanoparticles (NPs) in solution under stirring, and the Pr-SnO 2 /In 2 O 3 composite was obtained. Various characterization techniques confirmed the successful preparation of the Pr-SnO 2 NPs/In 2 O 3 composite. The specific surface area of the composite reached 72.07 m 2 /g. The sensing performance of the SnO 2 , Pr-SnO 2 , In 2 O 3 , SnO 2 /In 2 O 3 , and Pr-SnO 2 /In 2 O 3 sensors to ethanol gas were systematically investigated. Among these sensors, at the optimal working temperature, the Pr-SnO 2 /In 2 O 3 sensor displayed the best sensing performance with a response value of 75 towards 50 ppm ethanol, and further exhibited good linearity coefficient, selectivity, reproducibility, and long-term stability.
研究领域:
材料科学
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化学传感器
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纳米技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Gaojie Li,Kai Du,Xinxin Wang,Xiaochen Wang,Boao Chen,Chuangwen Qiu,Jiaqiang Xu
This study is attempted to improve the hydrogen sensing performance of SnO 2 based sensors by simultaneously employing two strategies of morphology control and noble metal loading. Therefore, SnO 2 ultrathin nanosheets with thickness not exceeding 3.5 nm were successfully synthesized by a hydrothermal method and then different content of Pd nanoparticles were uniformly loaded onto SnO 2 surface by in situ reduction with ascorbic acid . The gas sensing properties demonstrated that the introduction of Pd not only altered the selectivity of the SnO 2 sensor from ethanol to hydrogen, but also significantly improved the gas sensitivity and reduced the working temperature. And the optimal 1.0%Pd/SnO 2 sensor owned the highest sensitivity (75), fastest response-recovery property (21 s/13 s) to 20 ppm of hydrogen at 220 °C, and the actual detection limit is as low as 0.1 ppm. Furthermore, 1.0%Pd/SnO 2 sensor exhibited excellent repeatability, reproducibility and acceptable anti-interference of humidity. The DFT studies suggest that the physisorption of the hydrogen molecules on the surface of SnO 2 , but chemisorption on the surface of Pd/SnO 2 . The improved H 2 sensing performance of Pd/SnO 2 sensor attributes its ultrathin thickness of SnO 2 and catalytic dissociation of Pd to O 2 and H 2 .
研究领域:
材料科学
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化学
·
理论计算
✓ 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）