不同酸性助剂水热合成钨酸铋的制备及光催化性能研究  

Preparation and Photocatalytic Activity of Bi_2WO_6 by Hydrothermal Method with Differrent Acid-assited

作　　者：唐洁[1] 展红全[1] 江向平[1] 徐明珠[1] 李小红[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院,江西先进陶瓷材料重点实验室,景德镇333001

出　　处：《人工晶体学报》2013年第6期1092-1097,共6页Journal of Synthetic Crystals

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)

摘　　要：以Bi(NO3)3.5H2O、Na2WO4.2H2O为原料,NaOH为矿化剂,采用水热法合成Bi2WO6纳米晶体,并使用XRD、SEM、TEM、DRS和低温氮吸附等手段对样品进行表征,考察了其可见光降解RhB的催化性能,分析了不同酸性助剂CH3COOH和HNO3对水热法合成Bi2WO6光催化剂的影响。实验结果表明,不同酸性助剂对Bi2WO6样品的形貌和可见光催化活性均有较大影响。HNO3的添加抑制了花状微球的形成,使Bi2WO6样品的紫外-可见光吸收边发生红移,比表面积增大。光催化测试结果表明,以HNO3为酸性助剂时所制备样品的光催化活性最高,添加CH3COOH则相对降低。Bi2WO6 was prepared by hydrothermal method using Bi(NO3) 3.5H2O and Na2WO4.2H2O as raw materials and NaOH as mineralizer.Samples were characterized by XRD,SEM,TEM,DRS and low-temperature N2 adsorption.Photocatalytic activity of Bi2WO6 was investigated,and the effect of Bi2WO6 by different acid-assisted hydrothermal synthesis(CH3COOH and HNO3) was also evaluated.The results reveal that acid has a significant influence on the microstructure and photocatalytic activity of Bi2WO6.HNO3 inhibits the formation of flower microspheres,makes a red shift in the absorption band and enhances the surface areas of Bi2WO6.The results of photocatalytic test reveal that HNO3 enhance photocatalytic activity of Bi2WO6,while the CH3COOH has an opposite effect.

关 键 词：Bi2WO6 水热法 光催化活性 

分 类 号：O643.12[理学—物理化学]