Citation: YANG Zi-Rong, HAN Yu-Qi, WANG Fang, LIU Qian, ZHANG Yang, MIN Shi- Xiong. Significantly Improved Visible Light Photocatalytic Activity of γ-Bi₂MoO₆ by Surface Modification with Cu₂O Nanoparticles[J]. Acta Physico-Chimica Sinica doi: 10.3866/PKU.WHXB201301151 shu

Significantly Improved Visible Light Photocatalytic Activity of γ-Bi₂MoO₆ by Surface Modification with Cu₂O Nanoparticles

YANG Zi-Rong ¹ ,
HAN Yu-Qi ^1, ,
WANG Fang ^1, ,
LIU Qian ¹ ,
ZHANG Yang ¹ ,
MIN Shi- Xiong ^1,2

1.
1 Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities , College of Chemistry and Chemical Engineering , Hexi University, Zhangye 734000 , Gansu Province, P. R. China;
2 State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China

Received Date: 31 October 2012
Available Online: 15 January 2013
Fund Project: 国家自然科学基金(51263008) (51263008) 河西学院校长基金(XZ2010) (XZ2010) 河西学院大学生科技创新项目和甘肃省高校河西走廊特色资源利用省级重点实验室面上项目(XZ1012)资助 (XZ1012)

Nanosized cuprous oxide (Cu₂O) was used to modify the surface of γ-Bi₂MoO₆, resulting in highly efficient visible-light-responsive Cu₂O/γ-Bi₂MoO₆ composite photocatalysts. The obtained photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), X-ray photoelectron spectroscopy (XPS), and UV-Vis diffuse reflectance spectrum (UV-Vis-DRS) to determine their phase structures, micromorphologies, and light absorption properties. The important role of surface-modified Cu₂O in improving the photocatalytic activity of γ-Bi₂MoO₆ under visible light irradiation was studied using the degradation of methylene blue (MB). The results showed that Cu₂O nanoparticles with average size of ~10 nm modified the surface of the γ-Bi₂MoO₆. The nanoparticles delivered both an obvious red-shift of absorption threshold and intensity of the γ-Bi₂MoO₆, as well as enhanced separation efficiency of photogenerated carriers, thereby leading to significant enhancement in photocatalytic activity. When the amount of Cu₂O was 1.5%, the photocatalytic activity of the Cu₂O/γ-Bi₂MoO₆ composite photocatalyst was 6.4 times higher than that of pristine γ-Bi₂MoO₆.
- Cu₂O,
- γ-Bi₂MoO₆,
- Surface modification,
- Visible light,
- Methylene blue,
- Degradation
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Significantly Improved Visible Light Photocatalytic Activity of γ-Bi₂MoO₆ by Surface Modification with Cu₂O Nanoparticles