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Journal of Nanomaterials
Volume 2017, Article ID 6356021, 8 pages
https://doi.org/10.1155/2017/6356021
Research Article

Facile Synthesis of Solid Solution Microspheres through Ultrasonic Spray Pyrolysis for Improved Photocatalytic Activity

1College of Environmental and Biological Engineering, Putian University, Putian 351100, China
2Fujian Provincial Key Laboratory of Ecology-Toxicological Effects and Control for Emerging Contaminants, College of Environmental and Biological Engineering, Putian University, Putian 351100, China
3Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, New Territories, Hong Kong

Correspondence should be addressed to Jianhui Huang; moc.361@59gnauhnewo and Wingkei Ho; kh.khude@ohhtiek

Received 11 January 2017; Revised 27 March 2017; Accepted 11 April 2017; Published 14 May 2017

Academic Editor: K. K. R. Datta

Copyright © 2017 Jianhui Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nanocrystal solid solutions were successfully prepared using a facile and reproducible method of ultrasonic spray pyrolysis with Cd(Ac)2·2H2O, ZnCl2, and thiourea as precursors. Scanning electron microscopy and transmission electron microscopy images show that the prepared particles possess microspherical morphology. The band gaps of the solid solutions can be tuned by changing the constituent stoichiometries of Cd and Zn. The X-ray diffraction peaks gradually shift to small angle, and the absorption edge shifts to long wavelength with increasing Cd molar fraction in the solid solution. The sample prepared at the Cd/Zn ratio of 1 : 1 displays the optimal activity by using the photocatalytic degradation of methyl orange in the aqueous solution as model reactions under visible light irradiation. This study provides an effective route to prepare spherical ternary photocatalysts with mesoporous structure for further investigations and practical applications.