摘要
以硝酸铋、钨酸钠为原料,采用水热法合成了超大Bi2WO6微球,并使用X射线衍射、场发射扫描电子显微镜、透射电子显微镜、紫外可见分光光度仪等手段对样品进行表征,考察了其可见光催化降解RhB的性能。结果表明,水热反应生成了结晶度较高的且具有大量孔结构的超大微球,样品的吸收阈值位于可见光范围内,禁带宽度为2.71eV。样品经可见光照60min,RhB的降解率达到93.2%,循环使用6次后,光催化性能未出现大幅减弱。
Bismuth Tungstate（Bi2WO6） was prepared by hydrothermal method using Bi（NO3）3·5H2O and Na2WO4·2H2O as raw materials.Sample was characterized by XRD,SEM,TEM,DRS.The photocatalytic activity of the Bi2WO6 catalyst was investigated.The results reveal that super Bi2WO6 microspheres can be obtained,which posses high crystallinity and a large number of hole structures.The absorption band of the sample is located in the visible light range and its band gap reached 2.71 eV.After 60min visible irradiation,the degradation rate of RhB reached 93.2%.And after six cyclic tests,no obvious decrease of photocatalytic activity was detected.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2012年第12期14-16,22,共4页
China Ceramics
基金
国家自然科学基金(51262009,51062005,91022027)
江西省自然科学基金(2010GQW0037,2010GQW0038,20114BAB216018,20122BAB202001)
江西省主要学科学术和技术带头人培养对象计划项目(2010DD00800)
江西省高等学校“先进陶瓷材料”科技创新团队
江西省教育厅项目(GJJ11204,GJJ10226,GJJ12488)
关键词
Bi2WO6
水热法
微球
光催化活性
Bi2WO6
hydrothermal method
microsphere
photocatalytic activity
