Cubic ZnWO4 nano-photocatalysts synthesized by the microwave-assisted precipitation technique

被引：47
作者：
Amouzegar, Z. [1 ,2 ]
Naghizadeh, R. [1 ]
Rezaie, H. R. [1 ]
Ghahari, M. [3 ]
Aminzare, M. [1 ]
机构：
[1] Iran Univ Sci & Technol, Dept Mat & Met Engn, Tehran, Iran
[2] Islamic Azad Univ, North Tehran Branch, Young Researchers & Elites Club, Tehran, Iran
[3] Inst Color Sci & Technol, Nanomat & Nanocoatings Dept, Tehran 1668814811, Iran
来源：
CERAMICS INTERNATIONAL | 2015年 / 41卷 / 01期
关键词：
Microwave synthesis; Nanocrystalline; Photocatalyst; ZnWO4; NANOCRYSTALLINE ZNWO4; OPTICAL-ABSORPTION; METAL TUNGSTATES; DEGRADATION; FABRICATION; SCINTILLATION; DEFECTS; FACILE;
D O I：
10.1016/j.ceramint.2014.09.119
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A novel cubic-shaped nanocrystalline ZnWO4 photocatalyst has been successfully synthesized at 250 C in a very short time by a microwave assisted precipitation technique using Na2WO4 center dot 2H(2)O and ZnCl2 as raw materials. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) results indicated that obtained powder exhibited only wolframite structure with a cubic morphology. The direct optical band gap was estimated to be 3.74 eV by UV-vis diffuse reflectance spectroscopy (UV-vis DRS). The photocatalytic activity was investigated by the decomposition of aqueous Rhodamine B (RhB) under UV light irradiation. Cubic-shaped nanocrystalline ZnWO4 showed high photocatalytic activity and the degradation efficiency was 69% after 75 min. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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收藏
页码：1743 / 1747
页数：5
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