前驱体对熔盐法合成Bi_2WO_6光催化剂及其性能的影响  

Effects of Precursors on Synthesis and Properties of Bi_2WO_6 Photocatalyst by Molten Salt Method

作　　者：周林[1] 晋传贵[1] 余意[1] 李杰[1] 陆正[1] 冉松林[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002

出　　处：《过程工程学报》2016年第1期170-175,共6页The Chinese Journal of Process Engineering

基　　金：安徽省教育厅自然科学研究重点项目(编号:KJ2015A085);国家级大学生创新创业训练计划资助项目(编号:201210360111)

摘　　要：分别以Bi(NO3)3和Na2WO4溶液直接混合所得沉淀、加氨水所得沉淀及Bi(NO3)3×5H2O+Na2WO4×2H2O为前驱体,采用熔盐法合成Bi2WO6光催化剂粉体,研究了不同前驱体所制粉体的物相、形貌,以其为催化剂,在可见光照射下降解罗丹明B溶液.结果表明,用后二者为前驱体均可得到薄片状纯相Bi2WO6粉体.加氨水所得沉淀为前驱体所制Bi2WO6粉体的光催化性能最好,在可见光照射下对0.01 mmol/L RhB溶液的降解率在60 min内达99%.Bi2WO6 photocatalyst powder was synthesized by molten salt method using precipitate from mixed Bi（NO3）3 and Na2WO4 aqueous solutions with and without addition of ammonia, commercial Bi（NO3）3×5H2O and Na2WO4×2H2O as precursors, respectively. The effects of precursors on the phase composition, morphology and degradation of RhB under visible light were examined. The results indicated that pure flake-like Bi2WO6 powder could be prepared from two precursors： precipitate from mixed Bi（NO3）3 and Na2WO4 aqueous solutions with addition of ammonia solution, and commercial Bi（NO3）3×5H2O＋Na2WO4×2H2O. Bi2WO6 powder originated from the former precursor performed better on the photocatalytic degradation of RhB, which could degrade 0.01 mmol/L RhB almost completely（99%） under visible light irradiation within 60 min.

关 键 词：Bi2WO6 熔盐法 前驱体 光催化 罗丹明B 

分 类 号：TG174[金属学及工艺—金属表面处理]