期刊
MATERIALS & DESIGN
卷 89, 期 -, 页码 864-871出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2015.10.041
关键词
ZnO; Graphene; Ultrasonic assistance; Photocatalyst
资金
- National Natural Science Foundation of China [61171015]
- Open Project Program of State Key Laboratory of Analytical Chemistry for Life Science (Nanjing University) [KLACLS1010]
- Program of Department of Education of Jiangsu Province [12KJD610003]
- Natural Science Foundation of Jiangsu Province [BK20131249]
- Senior Personnel Scientific Research Foundation of Jiangsu University [15JDG084]
- Postgraduate Research and Innovation Project of Jiangsu University [KYXX_0026]
The graphene (G)-ZnO (G-ZnO) nanocomposites with high photocatalytic activity have been successfully prepared by a simple and inexpensive liquid phase-based ultrasonic-assisted method with different doping amounts of graphene oxide. The as-prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, UV-visible diffuse reflectance spectroscopy (UV-vis/DRS) and Brunauer-Emmett-Teller (BET) analysis. The results indicate that the assistance of ultrasonic can effectively decrease the size of ZnO nanostructure and increase the uniformity of the mixture of graphene and ZnO particles. Meanwhile, the sunlight absorption of the G-ZnO nanocomposite is gradually improving with the increase of the ratio of graphene. The obtained G-ZnO-30 photocatalyst shows the best photocatalytic activity for methylene blue (MB) and methyl orange (MO) under sunlight irradiation. The degradation rates of MB and MO in the presence of G-ZnO-30 reached up to 98.1% and 95.7%, respectively, under solar radiation for 1 hand 6 h. In addition, the photocatalyst exhibits outstanding separability and high stability. (C) 2015 Elsevier Ltd. All rights reserved.
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