Synthesis, characterization and optical properties of nanostructured ZnWO4

被引：33
作者：
He, Geping [1 ,2 ]
Fan, Huiqing [1 ]
Ma, Longtao [1 ]
Wang, Kaige [3 ]
Ding, Donghai [2 ]
Liu, Chao [2 ]
Wang, Zhiwei [2 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Sch Mat Sci & Engn, Xian 710072, Peoples R China
[2] Xian Univ Architecture & Technol, Coll Mat & Mineral Resources, Funct Mat Lab, Xian 710055, Peoples R China
[3] Northwest Univ, Inst Photon & Photon Technol, Xian 710069, Peoples R China
来源：
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2016年 / 41卷
关键词：
Nanostructured ZnWO4; Fluorescence; UV-visible; Raman; Optical correlation; ZINC TUNGSTATE NANOPARTICLES; PHOTOCATALYTIC ACTIVITY; SINGLE-CRYSTALS; HYDROTHERMAL SYNTHESIS; METAL TUNGSTATES; RAMAN-SPECTRA; AB-INITIO; FILMS; TEMPLATE; PERFORMANCE;
D O I：
10.1016/j.mssp.2015.09.025
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The ZnWO4 nanorods were fabricated by template-free hydrothermal route and characterized by X-ray diffraction, scanning electron microscopy, Raman, fluorescence and UV-visible spectra. The ZnWO4 nanorods were descended from ZnWO4 nanosheets with the increase of the pH value. The correlations among these optical spectra were studied and the results showed that the ZnWO4 nanorods had good crystallinity and few oxygen-vacancy defects comparing with ZnWO4 nanosheets. Fluorescence emission and UV-visible transmission spectra of ZnWO4 nanorods were increased, while the fluorescence excitation and UV absorption spectra were decreased in the wavelength region of 250-325 nm. This phenomenon was reversed in the wavelength region of 325-400 nm. The ZnWO4 nanorods displaying superior photocatalytic activity were suitable to be photocatalytic materials which could absorb selectively ultraviolet in the wavelength of 325-400 nm for their low recombination probability of light excited electron-hole. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：404 / 410
页数：7
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