Synthesis of TiO2/Bi2S3 heterojunction with a nuclear-shell structure and its high photocatalytic activity |
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| Authors: | Juan Lu Qiaofeng Han Zuoshan Wang |
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| Affiliation: | 1. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Soochow 215123, China;2. Materials Chemistry Laboratory, Nanjing University of Science and Technology, Nanjing 210094, China;1. Key Laboratory of Fluid and Power Machinery of Ministry of Education, School of Materials Science & Engineering, Xihua University, Chengdu, Sichuan, 610039, China;2. College of Physics and Energy, Fujian Normal University, Fuzhou, 350571, China;3. Key Laboratory of Magnetic Levitation Technologies and Maglev Trains of Ministry of Education, Superconductivity and New Energy R&D Center (SNERDC), Southwest Jiaotong University, Chengdu, Sichuan, 610031, China;S. chool of Chemistry and Materials Science, Ludong University, Yantai 264025, PR China;1. School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan 453007, China;2. Soochow Institute for Energy and Materials InnovationS, College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China;3. Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies, Soochow University, Suzhou 215006, China |
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| Abstract: | TiO2/Bi2S3 heterojunctions with a nuclear-shell structure were prepared by the coprecipitation method. The products were characterized by X-ray diffraction analysis, Raman spectra, transmission electron microscope images and energy dispersion X-ray spectra. Results showed that as-prepared Bi2S3 was urchin-like, made from many nanorods, and TiO2/Bi2S3 heterojunctions have a similar nuclear-shell structure, with Bi2S3 as the shell and TiO2 as the nuclear. The photocatalytic experiments performed under UV irradiation using methyl orange as the pollutant revealed that the photocatalytic activity of TiO2 could be improved by introduction of an appropriate amount of Bi2S3. However, excessive amount of Bi2S3 would result in the decrease of photocatalytic activity of TiO2. The relative mechanism was proposed. |
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