摘要
以聚苯乙烯(PS)为基体,采用溶胶-凝胶法制备了具有高效光催化性能的PS/Fe-ZnO复合薄膜,并以甲基橙和罗丹明B作为模型污染物,研究了其在可见光下的光催化活性。微观结构显示,合成的Fe-ZnO颗粒为规则的六角棱柱,并且在PS膜上分散良好。由于PS和Fe的引入,PS/Fe-ZnO复合薄膜表现出较高的可见光吸收性能。光催化性能实验表明:PS/Fe-ZnO复合薄膜具有较高的催化效果并且能够用于多种污染物的去除,70 min后对甲基橙和罗丹明B的降解率分别达到99.3%和80.2%。由于PS膜的束缚作用使得粉体流失较少,经过多次循环实验,其光催化甲基橙的效率仍保持在95%以上,具有较好的可持续性与环境友好性。机理研究证明,Fe-ZnO的催化增强是由于材料中产生的光生载流子分离效率提高导致的。
PS/Fe-ZnO composite films with high efficiency photocatalytic performance were prepared by sol-gel method using polystyrene(PS)as substrate.The photocatalytic activity of PS/Fe-ZnO composite films under visible light was studied using methyl orange and rhodamine B as model pollutants.The microstructure showed that the synthesized FeZnO particles were regular hexagonal prisms and well dispersed on the PS film.Due to the introduction of PS and Fe,PS/Fe-ZnO composite films showed high visible light absorption performance.Photocatalytic performance experiment showed that PS/Fe-ZnO composite films had a high catalytic effect and could be used for the removal of a variety of pollutants.The degradation rates of methyl orange and rhodamine B reached 99.3%and 80.2%respectively after 70 min.Due to the binding effect of PS film,the loss of powder was less.After several cycles of experiments,the efficiency of photocatalytic methyl orange remained above 95%,which had good sustainability and environmental friendliness.The mechanism study proved that the catalytic enhancement of Fe-ZnO was due to the increased separation efficiency of photogenic carriers generated in the material.
作者
陈今浩
张丽霞
陆旭冉
CHEN Jin-hao;ZHANG Li-xia;LU Xu-ran(Nanning Normal University,Nanning 530001,China;Guangxi University Xingjian College of Science and Liberal Arts,Nanning 530005,China)
出处
《塑料科技》
CAS
北大核心
2020年第10期67-71,共5页
Plastics Science and Technology
关键词
聚苯乙烯
ZNO
FE掺杂
催化效率
分离效率
Polystyrene
ZnO
Iron doped
Photocatalytic efficiency
Separation efficiency
