聚苯胺纳米线/SnO2复合光催化材料的光化学制备与性能  

Photochemical Fabrication and Performance of Polyaniline Nanowire/SnO Composite Photocatalyst

作　　者：杨思娴 钟文钰 李超贤 苏秋瑶 许炳佳 何谷平 孙丰强[1,2] YANG Sixian;ZHONG Wenyu;LI Chaoxian;SU Qiuyao;XU Bingjia;HE Guping;SUN Fengqiang(School of Chemistry,South China Normal University,Guangzhou 510006,China;Key Laboratory of Theoretical Chemistry of Environment,Ministry of Education,South China Normal University,Guangzhou 510006,China)

机构地区：[1]华南师范大学化学学院,广州510006 [2]华南师范大学环境理论化学教育部重点实验室,广州510006

出　　处：《高等学校化学学报》2021年第6期1942-1951,共10页Chemical Journal of Chinese Universities

基　　金：广东省高等学校珠江学者岗位计划项目(批准号:2017,2019);国家自然科学基金(批准号:21571068);广东省自然科学基金(批准号:2019A1515011389)资助。

摘　　要：将具有确定形态的聚苯胺(PANI)纳米线作为复合单元,直接分散在SnSO4和H2SO4的混合溶液中,通过紫外光照射获得PANI纳米线/SnO2纳米颗粒复合材料.对复合材料的形态和成分进行了分析,发现二者相互交织在一起且部分颗粒直接生长在纳米线上.以罗丹明B溶液为目标降解污染物研究了复合材料在低功率紫外灯下的光催化活性.结果表明,PANI纳米线可以明显增强SnO2的光催化活性,且增强效果与光照复合时间呈规律性变化,在最优复合时间下复合材料的光催化活性是纯SnO2的近3倍.通过对能级结构与光催化反应过程的测试分析,认为Z型异质结的形成促进了光生电子-空穴的分离,进而增强了材料的光催化活性.A study on SnO2/polymer composite photocatalytic materials was carried out.The polyaniline(PANI)nanowires with determined morphology were employed as composite units to control the formation and recombination of SnO2 by a room temperature photochemical method to achieve PANI enhanced photocatalytic activity.PANI nanowires were directly dispersed in a mixed solution of SnSO4 and H2SO4 to obtain PANI nanowire/SnO2 nanoparticle composites by UV irradiation.The morphology and composition of the composites were analyzed,and it was found that the two components were interwoven and some particles grew directly on the nanowires.The photocatalytic activity of the composite under low power UV lamp was studied with rhodamine B solution as the target degradation pollutant.The results showed that PANI nanowires could obviously enhance the photocatalytic activity of the SnO2,and the enhancement effect changed regularly with the growth time of SnO2.The photocatalytic activity of the composite obtained in the optimal recombination time was nearly 3 times that of the pure SnO2.By measuring and analyzing on the energy level structure and the photocatalytic reaction process,it is considered that the formation of z-scheme heterojunction promotes the separation of photogenerated electrons-holes,and then enhances the photocatalytic activity of the material.The subsequent photochemical recombination SnO2 with polymer nanomaterials with regular morphology as components is a new recombination mode.It has the characteristics of green,easy to operate and cheap,easy to regulate SnO2 photocatalytic activity,and can promote SnO2 application in the field of photocatalysis.

关 键 词：二氧化锡 聚苯胺 复合材料 光化学合成 光催化 

分 类 号：O644[理学—物理化学]