Hydrothermal synthesis and studies on photochromic properties of Al doped WO3 powder

被引：34

作者：

Shen, Yi ^{[1
]}

Yan, Peng ^{[1
]}

Yang, Yali ^{[1
]}

Hu, Fengping ^{[1
]}

Xiao, Yilin ^{[1
]}

Pan, Li ^{[1
]}

Li, Zhen ^{[1
]}

机构：

[1] China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 629卷

基金：

中国国家自然科学基金;

关键词：

WO3; Doping; Photochromism; Al; THIN-FILMS; TIO2; NANOPARTICLES; VISIBLE-LIGHT; XPS; TEMPERATURE; FABRICATION; CELLS;

D O I：

10.1016/j.jallcom.2014.11.218

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 series of pure and aluminum (Al) doped WO3 powders were synthesized at low temperature. The as synthesized materials have been characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible (UV-VIS) spectroscopy and color difference meter, respectively. A relation was found between the color difference and the UV-VIS photochromic activity. Moreover, the optical band gap of the as-prepared powder narrowed due to the appearance of impurity levels as the Al3+ ions migrated into the WO3 crystal lattice. Some rod-like particles have been found to decrease with the increase of Al concentration. An optimum Al concentration was found to be 0.25% to present the best UV-light induced photochromic activity. The mechanism of photochromic process of the Al-doped WO3 powders has been discussed in detail based on the characterization results. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：27 / 31

页数：5

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