Bi2MoO6/BiVO4异质结光催化剂的制备及性能

doi:10.11896/cldb.18010201

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Abstract Bi₂MoO₆/BiVO₄ heterojunction photocatalysts were synthesized via a hydrothermal-calcination method. The synthesized samples were cha-racterized by XRD, SEM, EDS-Mapping, XPS and UV-vis DRS. The results indicated that the crystal structure of BiVO₄ remained unchanged even though various proportions of Bi₂MoO₆ was added to form hetero-composite with BiVO₄. While there was a certain increase in crystallinity degree, thanks to the heterojunction structure of Bi₂MoO₆ and BiVO₄. Compared with pure BiVO₄, a red-shift in the photoabsorption edge of the Bi₂MoO₆ /BiVO₄ composite photocatalyst could be observed, resulting in a enlargement of response range of visible light, which contributed to improving the separation efficiency of electron-hole pairs and further enhancing the photocatalytic activity. Specifically, the Bi₂MoO₆ /BiVO₄ composite photocatalyst possessed the highest photocatalytic activity when the mass ratio of Bi₂MoO₆ and BiVO₄ was 5%. The degradation rate of methyl orange was 58%, which was 2.3 and 2.8 times of pure BiVO₄ and Bi₂MoO₆, respectively. Besides, the recycling experiments presented that the Bi₂MoO₆ /BiVO₄ composite photocatalyst retained excellent photo-stability after five-time recycles. The trapping experiments confirmed that the active species h⁺ and ·OH played an dominant role in the process of photocatalytic degradation.

Key words： Bi₂MoO₆ BiVO₄ heterojunction photocatalyst methyl orange

Published: 16 May 2019

CLC number:

O643

Fund:This work was financially supported by the National Natural Science Foundation of China for Youth (21207093), Liaoning Excellent Talents in University (LJQ2014023).

About author:: Yu Zhang received her M.S. degree in January 2019 from Northeastern University in engineering. During the master's degree, she is mainly engaged in the research of semiconductor photocatalytic materials, and published two papers on SCI journals.
Tong Zhu is currently a professor at the school of Mechanical Engineering and Automation, Northeastern University. He is a doctoral tutor and mainly engaged in research on water treatment technology. He has published more than 40 papers on SCI journals and has more than 20 patents.

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	ZHANG Yu
	WANG Min
	ZHOU Xin
	YANG Guangjun
	CHAI Tianyu
	ZHU Tong

Cite this article:

ZHANG Yu,WANG Min,ZHOU Xin, et al. Synthesis of Bi₂MoO₆/BiVO₄ Heterojunction and Its Efficient Visible Light Photocatalytic Activity[J]. Materials Reports, 2019, 33(10): 1597-1601.

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http://www.mater-rep.com/EN/10.11896/cldb.18010201 OR http://www.mater-rep.com/EN/Y2019/V33/I10/1597

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