气凝胶
材料科学
聚酰亚胺
光催化
可见光谱
吸收(声学)
量子点
超临界干燥
碳纤维
复合材料
化学工程
纳米技术
光电子学
有机化学
化学
图层(电子)
复合数
催化作用
工程类
作者
Yujie Bai,Xibin Yi,Bing Li,Shiwei Chen,Zijie Fan
标识
DOI:10.1016/j.apsusc.2021.151993
摘要
Polyimide was widely studied as semiconductor polymer photocatalyst. However, polyimide photocatalyst suffers from small specific surface area, poor visible light absorption and low charge thansfer efficiency. Herein, porous polyimide/carbon quantum dots aerogel was prepared successfully via supercritical CO2 drying method. The carbon quantum dots were obtained by a green hydrothermal method. The carbon quantum dots could be anchored intimately on the polyimide aerogel by π -π stacking interactions. The polyimide/carbon quantum dots aerogel had large specific surface area and porous structure. The carbon quantum dots increased the visible light absorption, adjusted the band structure of the polyimide aerogel and facilitated the generation and separation of photogenerated electron and holes. Thus the photocatalytic property of the polyimide/carbon quantum dots aerogel was increased compared to pure polyimide aerogel. h+ and ·O2– were the main active species to degrade the pollutant. Finally, the mechanism of the photocatalysis under the visible light was proposed.
科研通智能强力驱动
Strongly Powered by AbleSci AI