Journal
VACUUM
Volume 164, Issue -, Pages 66-71Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2019.03.002
Keywords
Graphene oxide; WO3 quantum dots; SiO2 macrosphere; Photocatalytic activity
Funding
- Hunan Provincial Natural Science Foundation of China [2018JJ2037, 14JJ2077]
- Open Fund of Key Laboratory of Special Environment Road Engineering of Hunan Province (Changsha University of Science Technology) [kfj170503]
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In order to enhance the interaction between GO/TiO2 nanostructure and SiO2 microsphere, graphene oxide/WO3 quantum dots/TiO2@SiO2 (GOWTS) microspheres were prepared by using urchin-like SiO2 microsphere as template, and were characterized with X-ray diffractometer (XRD), nitrogen adsorption analyzer, scanning electron microscope (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscope (XPS), respectively. Furthermore, the photocatalytic activity was tested by degrading Rhodamine b (RhB) solution. The resultant GOWTS microsphere possesses very good photocatalytic performance under UV light or nature solar light, in which the decomposition rate of Rhodamine B (RhB) reached 100% within 60 min under nature solar light without stirring. The degradation rate constant of GOWTS is about 3 times of GOTS. Moreover, the GOWTS microspheres display very good photocatalytic stability, indicating a potential industrial application in sewage treatment.
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