硅酸盐学报2012，Vol.40Issue(6)：916-921,6.
钨与铋摩尔比对Bi2WO6微晶形貌及光学性能的影响
Influence of W/Bi Mole Ratio on Morphology and Optical Property of Bi2WO6 Microcrystalline
摘要
Abstract
The microcrystalline of Bi2WO6 was synthesized with Bi(NO3)a-5H2O and Na2WO4·2H2O as raw materials by a hydrothermal process. The effect of n(W)/n(Bi) mole ratio on the morphology and optical property of the Bi2WO6 microcrystalline was investigated by X-ray diffraction, field-emission scanning electron microscope, transmission electron microscope and ultraviolet-visible diffusion reflectance spectroscopy, respectively. The results showed that the n(W)/n(Bi) had an effect on the synthesis of Bi2WO6 mieroerystalline in the hydrothermal process. When the n(W)/n(Bi) was in the range of 0.5:1.0-2:2, the microcrystalline of Bi2WO6 with an orthorhombic structure could be obtained. The Bi2WO6 microcrystalline possessed a superior crystallinity at the n(W)/n(Bi) of 1:2. The morphology of Bi2WO6 transformed from card-like sphere structure to densely sphere structure with the increase of W/Bi mole ratio. The Bi2WO6 microcrystallines exhibited an intensive absorption for ultraviolet, and its band gap decreased with the increase of W/Bi mole ratio. The calculated value of the band gap of the Bi2WO6 microcrystallites prepared at the n(W)/n(Bi) of 1.5:2.0 was 2.58 eV.关键词
钨酸铋/微晶/光学性能/水热法Key words
bismuth tungstate/crystallites/optical property/hydrothermal process分类
化学工程引用本文复制引用
卓艺乔,黄剑锋,曹丽云,吴建鹏..钨与铋摩尔比对Bi2WO6微晶形貌及光学性能的影响[J].硅酸盐学报,2012,40(6):916-921,6.基金项目
国家自然科学基金 （）
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基金（09JK361）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. （）
