摘要
采用声化学法,以偏钒酸铵(NH4VO3)和九水硝酸铁(Fe(NO3)3.9H2O)为原料制备了FeVO4微晶。利用X射线衍射仪(XRD),扫描电子显微镜(SEM),紫外可见吸收光谱(UV-vis)和示差扫描量热分析(DSC)分别对产物的物相、形貌和光学性能等进行了表征。结果表明:所制备的FeVO4微晶为三斜型结构,超声功率由300 W增加到500 W,微晶尺寸逐渐下降,大小更为均匀。UV-vis分析表明所制备的FeVO4微晶具有较强的吸收可见光特性,且随着超声辐射的功率的增加,粒径减小,禁带宽度由2.17 eV减小到2.08 eV。
FeVO4 crystallites were prepared by sonochemical method using NH4VO3 and Fe（NO3）3 · 9H2O as source precursors.The phase,morphology and optical properties of as-prepared samples were characterized by XRD,SEM,UV-vis absorption spectra and DSC.The results show that the synthesized FeVO4 crystallites have triclinic structure.The particle size of the crystallites decrease gradually and change more uniformity with the increase of ultrasonic irradiation power from 300 W to 500 W.UV-vis absorption spectra show that FeVO4 crystallites exhibit strong absorption in visible band,the grain size decreases and the corresponding bandgaps decrease about from 2.17 eV to 2.08 eV with the increase of ultrasonic irradiation power.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2012年第5期1227-1231,共5页
Journal of Synthetic Crystals
基金
国家自然科学基金(51102196)
陕西省国际科技合作重点项目(2011KW-11)
陕西省自然科学基金(2010JM6001)
陕西省教育厅专项项目(2010JK444)
陕西省教育厅自然科学专项基金(09JK361)
关键词
FeVO4微晶
声化学法
光学性能
FeVO4 crystallites
sonochemical method
optical property
