微波水热温度对合成Bi_2MoO_6微晶形貌和光学性能的影响  

Influence of Temperatures on the Morphology and Optical Property of Bi_2MoO_6 Microcrystallines Prepared by Microwave Hydrothermal Method

作　　者：张婷[1] 黄剑锋[1] 曹丽云[1] 周森[1] 费杰[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,西安710021

出　　处：《人工晶体学报》2012年第3期616-620,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(50962047);陕西省教育厅自然科学专项基金(2010JK444);陕西省教育厅自然科学专项项目(11JK0820);陕西省教育厅自然科学专项基金(09JK361);陕西科技大学研究生创新基金资助项目

摘　　要：以硝酸铋和钼酸钠为起始原料,采用微波水热法制备了片状的Bi2MoO6微晶。利用X射线衍射仪(XRD)、透射电子显微镜(TEM)和紫外-可见吸收光谱(UV-vis)分别对产物的物相组成、形貌和光学性能进行分析。结果表明:随着微波水热温度的升高,衍射峰的强度增强,产物的结晶程度逐渐提高,晶粒尺寸逐渐增大,Bi2MoO6微晶由不规则的形状转变成规则的片状结构;紫外-可见吸收光谱分析表明,Bi2MoO6微晶在紫外光区具有优异的吸收性能,且随微波水热温度的降低,其吸收边出现略微蓝移,禁带宽度逐渐增大。Bi2MoO6 microcrystallines were prepared by microwave hydrothermal（M-H） method using bismuth nitrate and sodium molybdate as the source materials.The phase composition,morphology and optical properties of as-prepared samples were characterized by powder X-ray diffraction（XRD）,transmission electron microscopy（TEM） and UV-visible absorption spectra（UV-vis）.The results show that with the increase of the microwave hydrothermal temperature,the peak intensity and grain size increase,inferring the improve in crystallization of the products,and the morphology of the Bi2MoO6 microcrystallines transform from irregular shape to sheet-like structure;UV-visible absorption spectra show that the Bi2MoO6 microcrystallines exhibit excellent absorption in ultraviolet.And with the decrease of the microwave hydrothermal temperature,the absorption edges display a blue shift,the bandgaps of the Bi2MoO6 microcrystallines increasing.

关 键 词：Bi2MoO6微晶 微波水热 光学性能 

分 类 号：O78[理学—晶体学]