摘要
采用水热法结合H2SO4浸泡处理成功合成了SO42-/Bi2O3可见光催化材料,并采用XRD、TG-DTA和UV-Vis等对合成产物的物相结构、热化学性能、光吸收性能以及可见光催化性能进行了研究,对H2SO4浸泡工艺条件对产物的可见光催化性能的影响进行了探讨。研究表明,水热合成产物为α-Bi2O3、Bi2O4和Bi2O2CO3的混合物,其中α-Bi2O3为主要成分;H2SO4浸泡处理并未改变产物的物相结构,但经H2SO4浸泡处理后产物的光催化性能得到了显著的提高,并且H2SO4浸泡工艺条件对产物的光催化活性有着重要的影响。在实验范围内,在浓度为0.5mol·L-1的H2SO4溶液中浸泡75min,再经700℃热处理4h可制备出具有较佳光催化活性的产物,经75min可见光的照射后对甲基橙溶液的光催化脱色率可达93.1%。
The visible-light responsive SO42-/Bi2O3 solid superacid catalyst was prepared via combining hydrothermal technology with a H2SO4 dipping process.Then the crystal structures,thermal and optical properties of the as-prepared samples were investigated by XRD,TG-DTA and UV-Vis.The effects of the concentration of H2SO4 solution,time of dipping treatment,and the heat treatment temperature were investigated.The results of XRD show that the as-prepared samples were the mixture ofα-Bi2O3,Bi2O4 and Bi2O2CO3 crystals,and the H2SO4 dipping treatment conditions have significant influence on the photocatalytic property of the as-prepared products.When the preparation conditions are chosen as：concentration of H2SO4 of 0.5mol·L-1,dipping time of 75 min and heat treatment temperature of 700℃for 4h,the photocatalytic decolourization ratio can reach 93.1%.
出处
《半导体光电》
CAS
CSCD
北大核心
2014年第4期637-641,共5页
Semiconductor Optoelectronics
基金
贵州自然科学基金项目(黔科合J字[2012]2269)
贵州省高层人才科研特助经费项目(TZJY-2011-40)
贵州省国际科技合作计划项目(黔科合外G字[2013]7015)
