硅酸盐学报2012，Vol.40Issue(9)：1331-1334,4.
微波水热时间对 ZnWO4纳米晶形貌及光学性能的影响
Influence of Reaction Time on Morphology and Optical Property of ZnWO4 Nanocrystallites Prepared by Microwave Hydrothermal Process
摘要
Abstract
The wolframite zinc tungstate nanocrystallites were prepared by a microwave hydrothermal method in the absence of template with Na2WO4·2H2O and Zn（COOCH3）2·2H2O as start materials. The phase, morphology and optical properties of the as-prepared samples were characterized by X-ray diffraction, transmission electron microscopy and UV-Vis absorption spectra, respectively. The results indicated that the wolframite ZnWOa nanocrystallites can be obtained by the microwave hydrothermal method at 180 ℃ for only 10 minutes. The morphology of ZnWO4 nanocrystallites changed from short to elongated rod-like with increasing microwave hydrothermal time. The as-prepared ZnWO4 nanocrystallites have a strong absorption in ultraviolet band. The corresponding band-gap of the ZnWO4 nanocrystallites increased with the increase of reaction time, which can be controlled in the range of 3.77-3.89 eV.关键词
微波水热法/钨酸锌/纳米晶/禁带宽度Key words
microwave hydrothermal method/zinc tungstate/nanocrystallites/band-gap分类
通用工业技术引用本文复制引用
张晓薇,曹丽云,黄剑锋,刘一军,李佳..微波水热时间对 ZnWO4纳米晶形貌及光学性能的影响[J].硅酸盐学报,2012,40(9):1331-1334,4.基金项目
国家自然科学基金项目 （）
陕西省教育厅科研计划项目资助基金 （）
陕西省教育厅自然科学专项项目（11JK0820）和陕西科技大学研究生创新基金资助项目 （）
