Morphology-controlled synthesis of CdSe microspheres on graphene oxide sheets and their photocatalytic properties |
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| Affiliation: | 1. School of Information Science and Technology, Donghua University, Shanghai 201620, China;2. College of Science, Donghua University, Shanghai 201620, China;3. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China;1. School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea;2. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;1. Instituto de Física, Benemérita Universidad Autónoma de Puebla, Apdo. Postal J-48, Puebla Pue. 72570, Mexico;2. Departamento de Física de Materiales, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, 28040 Madrid, Spain;1. Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 402160, China;2. Department of Chemical Engineering, New Mexico State University, Las Cruces, NM 88003, USA;1. State Centre for International Cooperation on Designer Low-Carbon and Environmental Material (SCICDLCEM), School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, PR China;2. Henan Information Engineering School, Zhengzhou 450000, PR China;3. Institute of Nanoscience and Nanotechnology, National Center for Scientific Research “Demokritos”, Athens 15310, Greece |
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| Abstract: | Different morphologies of CdSe microspheres have been synthesized on reduced graphene oxide (rGO) sheets by a simple hydrothermal process using Cadmium nitrate and Se powder as the raw materials. The hybrid CdSe/rGO samples were intensively investigated by XRD, EDS, XPS, SEM and UV–vis absorption spectrum. It was found that the EDTA/Cd2+ molar ratio is crucial for the formation of morphology of CdSe grown on rGO sheets. The results of XRD reveal that the as-prepared CdSe microspheres have zinc blend structure. The results of Raman spectra, EDS, XPS and SEM show that the CdSe microspheres are grown on rGO sheets. In addition, UV–vis absorption spectrum indicates that the CdSe/rGO nanocomposites are believed to serve as photosensitizers to extend the absorption spectrum to visible light region. Superior photocatalytic activity of urchin-like CdSe microspheres grown on rGO sheets relative to those of other CdSe/rGO nanocomposites was observed under visible light irradiation. The growth mechanism for the formation of CdSe microspheres grown on rGO sheets was also described. |
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| Keywords: | CdSe microspheres RGO Hydrothermal method Photocatalytic activity |
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