水热法制备Nd<sup>3+</sup>掺杂WO<sub>3</sub>粉体及其光致变色性质

周卓锐; 赵修建

doi:doi:10.3788/gzxb20194802.0216001

光子学报, 2019, 48 (2): 0216001, 网络出版: 2019-03-23

水热法制备Nd³⁺掺杂WO₃粉体及其光致变色性质

Hydrothermal Synthesis and Studies on Photochromic Properties of Nd³⁺ Doped WO₃ Powder

论文大纲

周卓锐 ^*赵修建

作者单位

武汉理工大学硅酸盐建筑材料国家重点实验室, 武汉 430070

稀土掺杂光致变色材料水热法六方晶相三氧化钨 Tungsten oxide Powder Rare earth ions doping Photochromism Hydrothemal methods

摘要

以钨酸钠为钨源, 硝酸钕为钕源, 加入硫酸钾作为矿化剂, 在120℃条件下通过水热法成功合成了六方相钕掺杂三氧化钨纳米粉.采用X射线衍射、扫描电镜和X射线光电子能谱分别对掺杂纳米粉的物相、形貌和掺杂成分进行了研究.结果表明, 钕离子成功掺杂进入三氧化钨晶格当中, 使一部分钨离子转为+5价, 从而使电子从价带激发到导带并且增加了光生电子-空穴对的数量, 导致其对激发光具有更大的吸收能力, 光致变色性能也得到了较大的增强.在钕离子掺杂浓度为5.63%时, 材料的光致变色性能最好, 其色差值为纯三氧化钨色差值的13倍.

Abstract

The synthesis of neodymium-doped hexagonal tungsten oxide nanopowder was reported by using sodium tungstate as the tungsten source, neodymium nitrate as the neodymium source, and potassium sulfate as the mineralizing agent. Phase composition, micro-morphology and doping content of the obtained nanopowder were studied by using X-ray diffraction analysis, scanning electronic microscopyand X-ray photoelectron spectroscopy. The result shows that only neodymium-doped hexagonal tungsten oxide was obtained in the synthesized product and no impurity was found. Due to successfully intruding Nd3+ ion into the host lattice, partial tungsten ions were reduced to be pentavalent, which further resulted exciting electrons from valence band to conducting band and formation of additional photogenerated electron-hole pairs. Then the photochromic performance of nanoowder was found highly improved contributing to the increased absorbance of excitation light. The nanopowder with best photochromic property was obtained in the sample with a optimized trivalent neodymium ion concentration of 5.63%. Its change of color was estimated to be 13 times of that observed in the pure WO3.

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周卓锐, 赵修建. 水热法制备Nd³⁺掺杂WO₃粉体及其光致变色性质[J]. 光子学报, 2019, 48(2): 0216001. ZHOU Zhuo-rui, ZHAO Xiu-jian. Hydrothermal Synthesis and Studies on Photochromic Properties of Nd³⁺ Doped WO₃ Powder[J]. ACTA PHOTONICA SINICA, 2019, 48(2): 0216001.

水热法制备Nd³⁺掺杂WO₃粉体及其光致变色性质

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