Fabrication and Photocatalysis of Rod-like ZnWO4 Nanocrystallites

doi:10.3724/SP.J.1077.2012.12024

Journal of Inorganic Materials ›› 2012, Vol. 27 ›› Issue (11): 1159-1163.DOI: 10.3724/SP.J.1077.2012.12024

• Research Paper • Previous Articles Next Articles

Fabrication and Photocatalysis of Rod-like ZnWO₄ Nanocrystallites

ZHANG Xiao-Wei¹, CAO Li-Yun¹, HUANG Jian-Feng¹, Liu Yi-Jun², LI Jia¹

(1. Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi’an 710021, China; 2. Guangdong Monalisa Ceramics Co.,Ltd., Foshan 528211, China)

Received:2012-01-09 Revised:2012-02-24 Published:2012-11-20 Online:2012-10-25
About author:ZHANG Xiao-Wei. E-mail: zhangxiaoweifish@126.com
Supported by:
National Natural Science Foundation of China (51072108); Natural Science Special Projects of Shaanxi Education Department (2010JK444); Natural Science Special Projects of Shaanxi Education Department (11JK0820); The Graduate Innovation Fund of Shaanxi University of Science and Technology

Abstract

Abstract: The Wolframite ZnWO₄ nanocrystallites were prepared by a facile, template-free microwave hydrothermal method using Na₂WO₄·2H₂O and Zn(COOCH₃)2·2H₂O as starting materials. The phase, morphology and optical properties of as-prepared samples were characterized by X-ray Diffraction (XRD), Transmission Electron Microscope (TEM), UV-Vis absorption spectra (UV-Vis) and photoluminescence spectroscopy (PL). Results indicate that ZnWO4 nanocrystallites have a preferential orientation growth along the (100) planes, and the morphology of ZnWO₄ nanocrystallites change into rodlike structure with the increase of microwave hydrothermal time. An intense blue PL emission with a 460 nm wavelength is observed when the as-prepared ZnWO₄ nanocrystallites are excited by a 295 nm wavelength, and they show a strong absorption in the ultraviolet region. The ZnWO₄ nanocrystallites whose orientation degree of (100) planes is 0.24 with the particle sizes of 50–60 nm show the best photocatalytic properties.

Key words: microwave hydrothermal method, ZnWO₄, morphology, photocatalysis

CLC Number:

TB32

ZHANG Xiao-Wei, CAO Li-Yun, HUANG Jian-Feng, Liu Yi-Jun, LI Jia. Fabrication and Photocatalysis of Rod-like ZnWO₄ Nanocrystallites[J]. Journal of Inorganic Materials, 2012, 27(11): 1159-1163.

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Fabrication and Photocatalysis of Rod-like ZnWO₄ Nanocrystallites

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