BULLETIN OF THE KOREAN CHEMICAL SOCIETY
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2020
·Vol. 41
·期 5
·552-557
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IF 0.611
Shan Li,Zhongping Chen,Datong Wu,Yong Qin,Yong Kong
A novel composite of graphene quantum dots functionalized Sb 2 WO 6 (GQDs/Sb 2 WO 6 ) was prepared by an electrostatic self-assembly method and used as a photocatalyst for the degradation of an organic pollutant. The resulting GQDs/Sb 2 WO 6 was characterized by electron microscopy and optical measurements. The photocatalytic activity of GQDs/Sb 2 WO 6 was investigated by degrading methyl orange (MO) under UV-light and visible-light irradiation. Compared with pure Sb 2 WO 6 , enhancement of the photocatalytic performance of GQDs/Sb 2 WO 6 was achieved, and the degradation efficiency for MO was almost 100% within 3 h under UV-light irradiation and 71.4% within 3 h under visible-light irradiation. The photocatalytic degradation mechanism of GQDs/Sb 2 WO 6 was illustrated by free radical and hole scavenging experiments, and the main active species were confirmed to be holes (h + ) and superoxide anion radicals (O 2 · − ). Moreover, the GQDs/Sb 2 WO 6 composites exhibited high recyclability and stability and had potential application for decomposing other organic contaminants in water.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
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IF 5.4
Jinxin Liu,Jinyuan Liu,Qichang Peng,Bin Wang,Xingwang Zhu,Xue Gao,Huaming Li,Hui Xu,Paul K. Chu
A Z-scheme heterojunction is designed and demonstrated to enhance the separation efficiency of photocatalytic carriers. In this paper, the 2D/2D Sb 2 WO 6 /g-C 3 N 4 (SWO/CN) Z-scheme heterojunction fabricated by electrostatic self-assembly has better degradation activity than individual Sb 2 WO 6 and g-C 3 N 4 . The rate constant K (0.0194 min −1 ) of RhB degradation by 40 % SWO/CN was higher than that of Sb 2 WO 6 (0.0054 min −1 ) and g-C 3 N 4 (0.0039 min −1 ). The rate constant K of 40 % SWO/CN for MBT degradation was 0.4391 h −1 , which was 2.96 and 9.32 times that of g-C 3 N 4 (0.1484 h −1 ) and Sb 2 WO 6 (0.0471 h −1 ). The photocurrent response and electrochemical impedance spectroscopy (EIS) reveal that the Z-scheme heterojunction facilitates the separation of photogenerated charge carriers. Electron spin resonance (ESR) and radical trapping experiments demonstrate the pivotal roles of holes (h + ), superoxide (·O₂ - ), and singlet oxygen ( 1 O₂) in the catalytic degradation process. The results provide insights into the design of high-performance 2D/2D Z-scheme photocatalysts and a fundamental framework for further enhancement.
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
Small
·
2024
·Vol. 20
·期 10
·2302943
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IF 13
Yanfen Wan,Yingfei Hu,Hongyu Tu,Wenbo Zhuang,Xuemin Geng,Tian Zhang,Jinghao Zhang,Ming Wen,Peng Yang
Herein, an integrated solar-thermal-power protocol is presented at a micro-nanoscopic level to maximize the energy utilization efficiency involving utilization period and utilization patterns, and the nexus of freshwater production and nanogeneration is realized. This sophisticated vaporization device is constructed with the merits of thermally confined evaporation space in favor of recycling latent heat of condensation and optimizing light absorption based on the local sunlight angle of incidence. Inspired by a bird's nest, Sb 2 WO 6 /D-Fructose composites are prepared as photothermal absorbers to achieve a superior water evaporation rate of 2.78 kg m −2 h −1 in the Multi-stage evaporator. In addition, a synergistic tandem photo thermal-electric device with a combination of solar-driven water evaporation and further waterflow-driven hydrovoltaic generation, which can output a stable voltage of up to 360.8 mV with effective utilization of steam energy and a limited water source, is exploited. Such integrated configurations pave a pathway for clean water production and renewable power generation simultaneously toward energy issues.
研究领域:
能源材料科学
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环境科学
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纳米技术
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DOI
PubMed
高影响因子
SYNTHETIC METALS
·
2018
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IF 2.526
Chengqiang Ding,Ziqian Li,Wensheng Tan,Hongda Li,Jianfeng Ma,Zhongping Chen,Yongxin Tao,Yong Qin,Yong Kong
A novel ultraviolet (UV)- and visible-light-active 3D graphene aerogels (3DGA)/Sb 2 WO 6 hybrid photocatalyst was prepared by electrostatic self-assembly (ESSA) method. The photocatalytic activity of the 3DGA/Sb 2 WO 6 hybrid was studied by monitoring the change in the concentration of methyl orange (MO) under UV-light and visible-light irradiation. The results demonstrated that the as-prepared hybrid exhibited significantly enhanced efficiency for the photodegradation of MO in comparison with pure Sb 2 WO 6 . This was ascribed to the efficient separation of the photogenerated electrons (e–) and holes (h + ) with the aid of 3DGA as well as the generated reactive superoxide radical anions (O 2 •–). Moreover, the 3DGA/Sb 2 WO 6 hybrid exhibited high recyclability, because the highly hydrophobic 3DGA in the hybrid was very advantageous to the separation of the hybrid photocatalyst from the MO solutions.
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
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 36
·18755-18766
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IF 11.301
Yingzhang Shi,Huan Wang,Zhiwen Wang,Taikang Wu,Yujie Song,Binbin Guo,Ling Wu
Optimizing the structure of semiconductor materials and introducing functional metal clusters have emerged as an effective strategy to improve the photocatalytic performances of catalysts through the synergistic effect between metals and supports. In this work, Pt nanocluster decorated hierarchical Sb2WO6 microspheres which are assembled from ultra-thin nanosheets with only 3.3 nm thickness (Pt/SWO-NS) jointly achieve an efficient photocatalytic reduction of nitrobenzene to aniline and show 10 times higher activity than Pt decorated bulk Sb2WO6 (Pt/SWO-bulk). More importantly, the respective roles of SWO-NS and Pt nanoclusters are deeply studied. SWO-NS with a unique 2D structure, abundant unsaturated surface sites and good visible light response would be favorable for stabilizing Pt nanoclusters, adsorbing and activating more nitrobenzene molecules and providing abundant photo-generated electrons. Meanwhile, Pt nanoclusters serve as electron enrichment centers to decompose HCOONH4 to produce rich ·CO2− and active H for reducing the activated nitrobenzene molecules. In addition, on combining coordination chemistry, a possible synergistic mechanism for hierarchical Sb2WO6 microspheres and Pt nanoclusters is proposed to elucidate the efficient reduction of nitrobenzene to aniline. We believe that this work would provide an effective strategy to optimize catalytic performance by the design of applicable nanocomposites with synergistic effects.
研究领域:
材料科学
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化学
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纳米技术
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催化
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环境科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2022
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IF 5.532
Zichen Zheng,Kewei Liu,Kaichun Xu,Chao Zhang
Various metal oxides with unique microstructures have been hopeful in fabricating gas sensors applications . This paper reports the room-temperature sensing properties of hierarchical Sb 2 WO 6 (antimony tungstate) microspheres for nonanal, which is a dominant aromatic aldehyde compound in cooked rice. The hierarchical Sb 2 WO 6 microspheres were obtained by pH control (from pH 1 to 5) through a one-step hydrothermal reaction . The experiment indicated that the optimal response of the Sb 2 WO 6 (pH = 4) gas sensor to 30 ppm nonanal reached 62 at room temperature, which was about 8 times that of Sb 2 WO 6 (pH = 1). The improved sensing performance resulted from the finer microstructure and larger specific surface area of Sb 2 WO 6 with a pH value of 4, providing abundant adsorption sites for nonanal molecules. Meanwhile, the practicability of cooked rice stored for various periods was verified through gas detection, and the results indicated that the sensor might recognize the deterioration of cooked rice and ready-to-eat rice. Therefore, the as-prepared sensor can be used in electronic nose systems to detect cooked rice and ready-to-eat rice deterioration and improve rice cooking methods.
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
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Yakun Zhang,Haijin Liu,Jianbiao Peng,Jiao Guo,Li Ding,Xin Cao,Yu Chang,Wissem Ben Soltan,Guoguang Liu
For this study, a Sb 2 WO 6 /Bi 4 O 5 I 2 composite material was successfully prepared via a precipitation-calcination method. The Sb 2 WO 6 /Bi 4 O 5 I 2 heterostructure enhanced the light absorption and facilitated the separation of charge carriers. Under simulated sunlight exposure, the removal rates of tetracycline (TC) and doxycycline hyclate (DOX·HCl) reached 88.2% and 83.9%, respectively, over an optimized SWB2 composite (theoretical mole ratio of Sb 2 WO 6 : BiOI was 1.5:10). Further, the total organic carbon (TOC) removal rates were 37.6% and 33.7%, respectively. The experiments explored various parameters including catalyst dosage, initial concentrations of TC and DOX·HCl, solution pH, and common inorganic ions. The TC and DOX·HCl degradation pathways were speculated. Furthermore, SWB2 demonstrated remarkable stability and cyclability under simulated sunlight. Trapping experiments and electron paramagnetic resonance (EPR) tests revealed that •O 2 - played a major role as a free radical in the photocatalytic process, while h + and •OH also had significant contributions. Based on in-situ XPS, trapping experiments, EPR test, band bending analysis, and SPV tests, the formation of S-scheme heterojunction between Sb 2 WO 6 and Bi 4 O 5 I 2 was inferred. This study provides insights into the design strategy of S-scheme heterojunctions between Aurivillius-type compounds and bismuth-rich halide bismuth oxide , which is informative for the development of advanced environmental remediation concepts.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Qichang Peng,Qingdong Ruan,Bin Wang,Jinyuan Liu,Chao Huang,Xingwang Zhu,Dan Li,Liangliang Liu,Yinchuan Wang,Xiaolin Zhang,Jia Yan,Paul K. Chu,Hui Xu
The escalating issue of water pollution has sparked significant attention among researchers in the field of photocatalysis . Consequently, it holds immense significance to develop photocatalysts that exhibit high charge separation efficiency and stability for effectively degrading pollutants in water. In this study, OV-Sb 2 WO 6 -X photocatalyst was synthesized by incorporating oxygen vacancies into pristine Sb 2 WO 6 . The introduction of oxygen vacancies significantly enhanced the charge separation efficiency, resulting in a substantial improvement in the photocatalytic activity . The content of oxygen vacancies was controlled by plasma treatment time, processed for 10, 20 and 30 min, and electron paramagnetic resonance (EPR) test demonstrated the introduction of oxygen vacancies successfully. Furthermore, X-ray photoelectron spectroscopy (XPS) characterized the internal electron flow direction of the photocatalyst. OV-Sb 2 WO 6 -20 showed the degradation rate of Rhodamine B (RhB) that nine times of the Sb 2 WO 6 , while the Tetracyclines (TC) degradation rate showed 3.5 times that of Sb 2 WO 6 . Moreover, OV-Sb 2 WO 6 -20 exhibited superior stability in terms of recycling activity and material structural integrity. Additionally, free radical trapping experiments and electron spin-resonance spectroscopy characterization demonstrated that h + played a crucial role as the reactive species during the degradation process. This research presents a viable approach for the modification of Sb 2 WO 6 -based materials, enabling effective treatment of dye wastewater and achieving successful purification.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Linzi Huang,Ling Bai,Xiaoqian Sun,Le Zhou,Xinyi Li,Yixi Xie,Chenxi Wang,Pengcheng Zhao,Junjie Fei
The development of efficient photoelectrochemical (PEC) sensing materials for the food additive carmine (CRM) remains a significant challenge, with no PEC sensor reported for CRM to date. Herein, we reported the first PEC sensor based on an Sb 2 WO 6 /CuO p-n heterojunction for CRM detection. The heterojunction interface facilitated efficient charge separation through an internal electric field, as elucidated by density functional theory calculations. The detection mechanism relied on the specific binding between the carboxyl and hydroxyl groups in CRM molecules and the metal sites on the CuO surface. This interaction blocked the active sites, inhibited hole transfer, and led to a significant decrease in photocurrent. The sensor exhibited a wide linear range (0.4 - 500 μM), a low limit of detection (0.19 μM), and excellent stability (>96.74%). Furthermore, its successful application in beverage samples yielded recovery rates of 97.30 - 101.50%. This work provides a novel PEC platform for sensitive food additive monitoring.
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高影响因子
FOOD CHEMISTRY
·
2023
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IF 8.8
Chao Zhang,Zichen Zheng,Kewei Liu,Marc Debliquy,Qiaoquan Liu
The palatability of cooked rice is susceptible to the flavor and effective detection of volatile organic compounds (VOCs) can avoid deterioration and improve the taste quality. Herein, hierarchical antimony tungstate (Sb 2 WO 6 ) microspheres are synthesized through a solvothermal process and the effect of solvothermal temperature on the room temperature gas-sensing properties of gas sensors is investigated. Outstanding sensitivity towards VOC biomarkers (nonanal, 1-octanol, geranyl acetone and 2-pentylfuran) in cooked rice is achieved and the sensors exhibit remarkable stability and reproducibility, which are contributed to the formation of the hierarchical microsphere structure, larger specific surface area, narrower band gap and increased oxygen vacancy content. The kinetic parameters combined with principal component analysis (PCA) effectively distinguish the four VOCs while the enhanced sensing mechanism was substantiated through density functional theory (DFT) calculation. This work provides a strategy for fabricating high performance Sb 2 WO 6 gas sensors which can be practically applied to food industry.
研究领域:
食品科学
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材料科学
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化学
✓ 已验证
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）