用于水中污染物去除的聚苯乙烯/BiOBr复合薄膜的研究

Study on Polystyrene/BiOBr Composite Film for Water Contaminant Removal

通过废弃聚苯乙烯(PS)和溴氧铋(BiOBr)光催化粉体混溶制备了PS/BiOBr光催化薄膜,BiOBr粉体在PS薄膜上均匀分布,并且体现了较强的光吸收性能。光催化性能表明,PSB-1在30 min内对甲基橙的降解效率达到了93.82%,高于BiOBr粉体和其他比例的PSB薄膜。同时,经过多次循环后仍表现出了较好的催化性能以及结构,说明其具有较好的循环性能与实用性。机理分析中,由于Cu^(2+)和对苯醌对于e^(-)和O2·^(-)的捕捉作用,加入捕获剂后PSB-1的光催化反应速率发生了明显的下降,说明e^(-)和O2·^(-)在催化过程中发挥主要作用。同时,本研究为高效利用废弃物以及污染物处理提供了一定的思路。

The PS/BiOBr photocatalytic films were prepared by the mixing of waste polystyrene(PS)and bromoxbismuth(BiOBr)photocatalytic powders.The photocatalytic PS/BiOBr powders were uniformly distributed on the PS films and showed strong light absorption performance.Photocatalytic performance showed that the degradation efficiency of PSB-1 to methyl orange reached 93.82%within 30 min,which was higher than that of BiOBr powder and other proportions of PSB thin films.At the same time,after many cycles,the catalytic performance and structure are better,which indicates that the catalytic performance and practicability are better.In the mechanism analysis,the photocatalytic reaction rate of PSB-1 decreased significantly after the addition of the trapping agent due to the trapping effect of Cu^(2+)and p-benzoquinone on e^(-)and O2·^(-),indicating that e^(-)and O2·^(-)played a major role in the catalytic process.At the same time,this study provides some ideas for the efficient utilization of waste and the treatment of pollutant.