JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 5
·1-12
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IF 2.8
Wang Ze-Hong,Jia Yun-Ning,Wu Xiang-Feng,Song Meng-Chen,Ma Xiao-Ye,Wang Hui,Zhang Xue-Feng
Semiconductor photocatalysis is a promising method to solve the problem of antibiotic pollution in water. A series of Bi 2 SiO 5 /BiVO 4 composite photocatalysts for tetracycline and levofloxacin degradation are prepared by a two-step hydrothermal method. Analysis results show that the as-prepared Bi 2 SiO 5 /BiVO 4 (2:3) hybrid exhibits better photocatalytic activity than pure samples under visible light illumination. The photocatalytic degradation efficiency of the as-prepared composite shows the maximum of 72.2% within 120 min for tetracycline, which is higher than 43.5% of pure Bi 2 SiO 5 and 67.2% of pure BiVO 4 , respectively. Furthermore, it is 80.3% within 120 min for levofloxacin, which is higher than 7.6% of pure Bi 2 SiO 5 and 69.7% of pure BiVO 4 , respectively. The formation of n–n isotype heterojunction at the interface of Bi 2 SiO 5 and BiVO 4 in the as-prepared composites causes to the improvement of the transport rate and separation efficiency of the photogenerated electron and hole pairs. In addition, the holes play a dominant role in the photocatalytic degradation process. This work will provide a reference for the study of visible light driven photocatalysts to solve antibiotics pollution in water.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Xin Li,Jiaxian Li,Yuan Tian,Yang Yang,Wanping Chen,Runquan Wang,Yuerong Zhang,Kai Song,Yuan Wei,Guoying Wang,Gaofeng Shi
Peroxyl radicals (RO 2 ) are important components of atmospheric radical cycling and generation, but their formation, distribution and evolution mechanisms in the atmospheric environment have not been investigated. In this paper, we propose a novel atmospheric RO 2 radical trapping membrane that can trap low carbon number (Rc ≤ 5) RO 2 radicals and identify their R-group structures by fluorescence spectroscopy and chromatography. We also analyzed the composition and evolution mechanism of RO 2 species under different meteorological conditions in the atmospheric environment of Lanzhou, China, to provide scientific support for the treatment and research of atmospheric chemical pollution.
研究领域:
环境科学
·
化学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Qingnan Meng,Rui Fu,Kai Yang,Wei Su,Bo Wang,Xu Shang,Yufei Tang,Kang Zhao
Polydopamine (PDA) has shown charming co-catalytic activity in the classical Fenton and Fenton-like reactions. However, the improvement is merely attributed to the Fe 2+ regeneration ability of PDA. The co-catalytic role and cycling stability of PDA in the CaO 2 based Fenton-like reaction have been rarely explored despite CaO 2 is considered safer than the liquid H 2 O 2 . In this study, floatable co-catalysts were fabricated by coating PDA on polyvinyl alcohol (PVA) sponges. It is proven that in the composite can accelerate not only the Fe 3+ reduction but also the reaction between Fe 2+ and H 2 O 2 released by CaO 2 . Therefore, lower concentrations of Fe 2+ and H 2 O 2 in the CaO 2 /Fe 3+ Fenton-like system were detected respectively, along with higher efficiency in Rhodamine B (RhB) removal. In addition, in the reusing test, the RhB degradation still maintained at 81.2% after the fifth cycle. The reasons for the decreased activity were carefully investigated. First, the RhB adsorption is largely disturbed by the Ca 2+ and Fe 3+ /Fe 2+ ions adsorbed during the reaction. Secondly, both declined Fe 2+ regeneration and H 2 O 2 consumption were observed, due to the reduced content of phenolic hydroxyl groups on the PDA surface.
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高影响因子
CERAMICS INTERNATIONAL
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2023
·
IF 5.2
Yirui Zhao,Hongshun Hao,Jiaqi Zhong,Gongliang Zhang,Jingran Bi,Shuang Yan,Feng Hong,Hongman Hou
Foodborne pathogens are the main factors causing food poisoning, and it is of great significance to develop novel nanocomposites to obtain efficient and stable photothermal-assisted photocatalysts for killing foodborne pathogens. In this paper, Z-type heterojunction WO 3 /TpPa-1 with a core-shell structure was constructed by in-situ synthesis, and the Nb 2 CT x was used as a co-catalyst to obtain an efficient ternary composite WO 3 /TpPa-1/N-Nb 2 CT x . Compared to the monomers, the ternary composites improved light trapping, interfacial separation effectiveness, and the mobility of photogenerated carriers. The WO 3 /TpPa-1/15% N-Nb 2 CT x has the best sterilization efficiency of 99.69% under visible-infrared light irradiation for 30 min. The construction of WO 3 /TpPa-1/N-Nb 2 CT x promoted the separation of electron and hole pairs, which improved the electron transport efficiency and the generation of reactive oxygen species. In addition, the excellent photothermal effect of Nb 2 CT x improves the sterilization performance of WO 3 /TpPa-1/N-Nb 2 CT x . The WO 3 /TpPa-1/N-Nb 2 CT x has a broad application prospect in photothermal-assisted photocatalytic sterilization.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
·
IF 7.2
Shihai Cao,Yuqi Zhao,Jiayuan Guo,Mengjie Fu,Xindi Yu,Lingxiao Ren,Huan Chen,Fang Jiang
The active sites on the surface of catalysts play a pivotal role in the photocatalytic technology. Herein, the tiny nickel/nickel oxides (Ni/NiO x ) were embedded in graphitic carbon nitride (CN) as active sites and the heterojunction of CN-supported Ni/NiO x (CN-mNi/NiO x ) has been developed by a rational one-step carbonization of nickel acetylacetonate and urea. The incorporation of nickel acetylacetonate plays dual roles in enhancing photocatalytic activity of CN-mNi/NiO x : (1) they could stabilize Ni/NiO x through the interaction with -NH x groups on CN, thereby making small size and good dispersion of Ni/NiO x . The Ni/NiO x active sites can be highly exposed to adsorption/activation O 2 and H 2 O molecules; (2) they acted as an interfacial connection to form a well-developed combined interface, which was beneficial to separation and transmission of photogenerated carriers . As a result, the CN-0.1Ni/NiO x sample shown a H 2 evolution of 31.56 μmol g −1 h −1 and the degradation efficiency of sulfathiazole (STZ) was up to 78.5 % within 240 min, which was 18.12 and 3.43 folds to bulk CN, respectively. The finding offers new opportunities to construct active sites on the surface of CN to achieve highly efficient photocatalytic performance, which exhibits great potential in the development of photocatalysts with excellent performance for energy conversion and environment remediation.
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高影响因子
危险品化学品经营许可证（带存储）