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Founded in 1987， Bimonthly
Supervisor：Jiangxi University Of Science And Technology
Sponsored by：Jiangxi University Of Science And Technology
Jiangxi Nonferrous Metals Society
ISSN：1674-9669
CN：36-1311/TF
CODEN YJKYA9
Volume 10 Issue 2
Apr.  2019
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WANG Shuhong, LIU Xin, KONG Bin, LU Jiawei, LI Hong, LIU Liequan, WANG Jinjin, CHEN Juan, HUANG Weiya. Synthesis of CeO2/Bi2MoO6 nanocomposites and their enhanced photocatalytic degradation performance[J]. Nonferrous Metals Science and Engineering, 2019, 10(2): 68-76. DOI: 10.13264/j.cnki.ysjskx.2019.02.010
Citation: WANG Shuhong, LIU Xin, KONG Bin, LU Jiawei, LI Hong, LIU Liequan, WANG Jinjin, CHEN Juan, HUANG Weiya. Synthesis of CeO2/Bi2MoO6 nanocomposites and their enhanced photocatalytic degradation performance[J]. Nonferrous Metals Science and Engineering, 2019, 10(2): 68-76. DOI: 10.13264/j.cnki.ysjskx.2019.02.010
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Synthesis of CeO2/Bi2MoO6 nanocomposites and their enhanced photocatalytic degradation performance

  • School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

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  • Received Date: November 28, 2018
  • Published Date: April 29, 2019
    Graphical Abstract
    • Abstract
  • A series of CeO2/Bi2MoO6 nanocomposites were prepared by hydrothermal method. The effect of pH value (2~9) and Ce/Bi molar ratio (3 %~10 %) on the photocatalytic performance of the prepared composites were investigated. The composition, structure and photoelectric properties of the catalyst were characterized by X-ray powder diffraction, scanning electron microscopy, infrared spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, photoluminescence spectroscopy and transient photocurrent-time response spectrum, etc. The results showed that the morphology of Bi2MoO6 (BMO) crystals was needle-like at pH 6, and it became thick after recombination with CeO2. At the same time, the specific surface area reduced and the crystal particles enlarged. Photocatalytic activity of the catalyst was tested by photocatalytic degradation of Rhodamine B (RhB), methylene blue (MB) and phenol, respectively, under simulated sunlight irradiation (a 300 W Xenon lamp). The results showed that the optimal composite containing 5 % CeO2 could achieve the maximum photocatalytic degradation rate. Under the same experimental conditions, reaction rate constants of photocatalytic degradation of RhB, MB and phenol by 5 % CeO2/BMO were 0.037, 0.016 and 0.007 min-1, respectively, which were 3.19, 1.70 and 4.58 times higher than pure BMO, respectively. The enhanced photocatalytic performance was attributed to the formation of heterojunctions between CeO2 and Bi2MoO6, which were beneficial to the efficient separation of photogenerated electrons and holes. This, as a result, increased the content of active free radicals. Free radical trapping experiments showed that superoxide ion radical (O2-)、hydroxyl radical (OH) and holes (h+) all participated in the photocatalytic degradation, and their influence was in the order of O2->OH>h+.
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