不同胶束浓度制备BiOBr及其光催化性能

Preparation of BiOBr in Different Micelle Concentration and Its Photocatalytic Performance

以十六烷基溴化吡啶（CPB）为模板剂和溴源,Bi（NO_3）_3·5H_2O为铋源,甘露醇溶液作为溶剂,制备了不同胶束浓度条件下的BiOBr光催化剂,采用SEM、XRD、EDS、UV-Vis吸收光谱和PL光谱分析等方法对BiOBr的结构和光化学性质进行了表征.在可见光（＆gt;420nm）照射下,以罗丹明B为底物研究光催化特性,结果表明,在CPB为3倍临界胶束浓度（3cmc）时制备的BiOBr具有最好的光催化活性,45min内对罗丹明B脱色率可达99.6%,脱色过程中主要涉及的活性物种为空穴和羟基自由基.

BiOBr catalysts with different micelle concentrations were prepared through template method by altering cetylpyridinium bromide concentration. The morphology and structure of BiOBr catalysts were characterized by SEM, XRD, EDS, UV-Vis DRS and PL. Results indicated that the sample prepared by using 3cmc micelle concentrations showed the highest photocatalytic activity for the decolorization of Rhodamine B under visible light irradiation （〉420 nm）, and the highest decolorization rate reached up to 99.6o/{0 in 45 min. Hydroxide radical （OH.） and photoge- nerated hole （h＋） were the major active species.