Bi<sub>2</sub>WO<sub>6</sub>/ZIF-67复合光催化剂的制备及性能研究

doi:10.11896/cldb.21010028

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Abstract Flower-like Bi₂WO₆ microspheres were prepared via the hydrothermal method, and ZIF-67 nanoparticles were loaded on the surface of Bi₂WO₆ microspheres to prepare Bi₂WO₆/ZIF-67 composite photocatalyst. XRD, XPS, FTIR and SEM were used to characterize the structure, surface groups and morphology of the composite photocatalyst. The photochemical and electrochemical properties of the composite photocatalyst were investigated by measuring UV-Vis spectra, photoluminescence spectra, electrochemical impedance spectra and transient photocurrent. Degradation of tetracycline hydrochloride by the composite photocatalyst was tested under visible light irradiation. Results revealed that ZIF-67 nanoparticles were loaded uniformly on the surface and cracks of Bi₂WO₆. The combination of Bi₂WO₆ and ZIF-67 effectively increased the separation efficiency of photo-induced electron-hole pairs and further improved the photocatalytic performance of the composite photocatalyst. Under visible light irradiation, the photocatalytic reaction rate of Bi₂WO₆/ZIF-67 was 4.53 times and 5.87 times as high as that of Bi₂WO₆ and ZIF-67, respectively. Free radical capture experiments indicated that holes (h⁺), superoxide radical (·O₂^-) and hydroxyl radicals (·OH) were the main active species in the photocatalytic degradation process. Photocatalytic mechanism was also proposed, and the photocatalytic reaction of Bi₂WO₆/ZIF-67 catalyst was attributed to the Z-scheme photocatalytic mechanism.

Key words： photocatalysis Bi₂WO₆ ZIF-67 metal-organic framework tetracycline hydrochloride

Published: 25 April 2022 Online: 2022-04-27

CLC number:

TQ032

Fund:National Key R & D Program of China (2019YFC0408400) and Tianjin Key Science and Technology Program Foundation (19PTZWHZ00030, 19YFSLQY00060, 19YFZCSF01110).

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	CHANG Na
	CHEN Yanru
	XIE Feng
	WANG Haitao

Cite this article:

CHANG Na,CHEN Yanru,XIE Feng, et al. Preparation and Photocatalytic Performance of Bi₂WO₆/ZIF-67 Composite Photocatalyst[J]. Materials Reports, 2022, 36(8): 21010028-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21010028 OR http://www.mater-rep.com/EN/Y2022/V36/I8/21010028

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