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Chinese Journal of Materials Research  2020, Vol. 34 Issue (2): 92-100    DOI: 10.11901/1005.3093.2019.443
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Microstructures and Photocatalytic Properties of BiOCl-RGO Nanocomposites Prepared by Two-step Hydrothermal Method
QIN Yanli1,2,YANG Yan1,2,ZHAO Pengyu1,2,LIU Zhenyu2,NI Dingrui2()
1. School of Science, Shenyang Ligong University, Shenyang 110159, China
2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Cite this article: 

QIN Yanli,YANG Yan,ZHAO Pengyu,LIU Zhenyu,NI Dingrui. Microstructures and Photocatalytic Properties of BiOCl-RGO Nanocomposites Prepared by Two-step Hydrothermal Method. Chinese Journal of Materials Research, 2020, 34(2): 92-100.

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Abstract  

Composites of BiOCl-RGO were synthesized via a two-step hydrothermal method. Firstly plain BiOCl was synthesized in the mixed solution of ethylene glycol and deionized water, the acquired nanosphere-like BiOCl of about 400 nm in diameter composed of many nanosheets. Then the RGO carrier was deposited onto the plain BiOCl to prepare BiOCl-RGO nanocomposites. The composites were characterized by Raman spectroscopy, XRD, XPS, SEM and TEM. The photocatalytic property of the composites was evaluated by degrading methyl orange. The results show that the temperature of hydrothermal process significantly affects the photocatalytic property of the composites. The composite of BiOCl -graphene prepared at 140°C shows the highest photocatalytic performance.

Key words:  composite      bismuth oxychloride (BiOCl)      graphene      hydrothermal method      photocatalytic performance     
Received:  12 September 2019     
ZTFLH:  O643  
Fund: National Natural Science Foundation of China(51871215);Program of Liaoning Science and Technology Department(1010145002220);Program of Liaoning Education Department (LG201605)

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https://www.cjmr.org/EN/10.11901/1005.3093.2019.443     OR     https://www.cjmr.org/EN/Y2020/V34/I2/92

Fig.1  Raman spectra of samples (a) spectra of single BiOCl and BiOCl in BiOCl-RGO composite particles, (b) spectra of RGO in BiOCl-RGO composite particles
Fig. 2  XRD pattern of prepared samples
Fig.3  XPS spectra of composites (a) Bi 4f of B, (b) Cl 2p of B, (c) C 1s of BR-120
Fig.4  SEM images of prepared samples (a) sample B with low magnification, (b) sample B with high magnification, (c) sample BR-120
Fig.5  TEM images of prepared samples (a) sample B, (b) sample BR-120
Fig.6  Absorption spectra of MO aqueous solution degraded by prepared samples (a) B, (b) BR-120, (c) BR-140, (d) BR-160
Fig.7  Photocatalytic degradation rate of composites prepared at different heat treatment temperatures (a) and corresponding the first-order kinetics diagram of degradation rate (b)
SamplesK/min-1R/%
B0.031870.3%
BR-1600.042562.7%
BR-1400.044284.1%
BR-1200.042576.5%
Table 1  Quasi-first-order rate constants and catalytic efficiency of MO degradation by photocatalyst under visible light irradiation
Fig.8  Possible mechanism of BiOCl-RGO degrading MO
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