Fabrication of SnO2/SnS2 hybrids by anchoring ultrafine SnO2 nanocrystals on SnS2 nanosheets and their photocatalytic properties |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Institute of Physical Chemistry, Development Center for New Materials Engineering & Technology in Universities of Guangdong, Lingnan Normal University, Zhanjiang 524048, PR China;1. School of Materials Science and Engineering, Shaanxi University of Science & Technology, Xi'' an, Shaanxi 710021, China;2. Guangdong Monalisa New Material Group Co. Ltd., Foshan, Guangdong 528211, China;1. College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, People’s Republic of China;2. State Key Lab of Silicon Materials, Zhejiang University, Hangzhou, 310018, People’s Republic of China;3. College of Automation, Hangzhou Dianzi University, Hangzhou, 310018, People’s Republic of China;1. School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi’an, 710021, China;2. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China;3. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China;1. State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China;2. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, PR China;1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South–Central University for Nationalities, Wuhan 430074, PR China;2. Institute for Superconducting & Electronic Materials, School of Mechanical, Materials and Mechatronics Engineering, University of Wollongong, Wollongong, NSW 2522, Australia |
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| Abstract: | Ultrafine SnO2 nanocrystals with sizes of ~4 nm have been successfully loaded on the SnS2 nanosheets to fabricate SnO2/SnS2 hybrids via a facile hydrothermal method. The obtained samples are well characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), UV–vis spectroscopy, photoluminence (PL) and electrochemical impedance spectroscopy (EIS). The experimental results indicate that the SnO2 nanocrystals of ~4 nm are well dispersed and intimately anchored on the SnS2 nanosheets to form nanosized heterojunctions, which can be favorable to the separation of photo-generated holes and electrons. Consequently, the SnO2/SnS2 hybrids demonstrate obviously enhanced photocatalytic activities for reduction of Cr (VI) under visible light compared with both the bare SnO2 and SnS2. |
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| Keywords: | Tin dioxide Tin disulfide Hybrid Photocatalysis |
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