Structure, optical properties, and magnetism of Zn1-xNixWO4 (0 ≤ x ≤ 1) solid solution

被引：15
|
作者：
Huang, Hongwei [1 ]
Liu, Liyuan [1 ]
Tian, Na [1 ]
Zhang, Yihe [1 ]
机构：
[1] China Univ Geosci, Natl Lab Mineral Mat, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Beijing 100083, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 637卷
关键词：
ZnWO4; NiWO4; Band gap; Magnetic susceptibility; ENHANCED PHOTOCATALYTIC ACTIVITY; METAL TUNGSTATES; LIGHT; ZNWO4; NIWO4; COMPOSITES; RANGE;
D O I：
10.1016/j.jallcom.2015.02.224
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel Zn-1 xNixWO4 (0 <= x <= 1) solid solution with full compositions range has been successfully developed by a hydrothermal-annealing method for the first time. The crystal structure was characterized by X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectra and scanning electron microscopy (SEM). It was found that the entire range of compositions display a single-phase in the wolframite structure with a symmetry P2/c. The diffuse reflection spectroscopy (DRS) measurements on Zn-1 xNixWO4 (0 <= x <= 1) indicated that the optical band gap size across the solid solution exhibits red-shifts from 2.8 eV to 1.63 eV for indirect transition and 3.56 eV to 2.77 eV for direct transition with the increase of Ni2+ content. As deduced from the magnetic susceptibility measurements on NiWO4 and Zn0.5Ni0.5WO4, they are paramagnetic and obey the Curie-Weiss law. Moreover, their effective magnetic moments are determined to be 9.96 mu(B) and 6.45 mu(B), respectively. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：471 / 475
页数：5
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