标题：Polyimide aerogels crosslinked with MWCNT for enhanced visible-light photocatalytic activity
作者：Zhao, Xinfu; Zhang, Jian; Wang, Xinqiang; Zhang, Jing; Liu, Benxue; Yi, Xibin
作者机构：[Zhao, Xinfu; Zhang, Jing; Liu, Benxue; Yi, Xibin] Qilu Univ Technol, Shandong Prov Key Lab Special Silicone Containing, Adv Mat Inst, Shandong Acad S 更多
通讯作者：Zhao, Xinfu;Zhao, XF;Yi, XB
通讯作者地址：[Zhao, XF; Yi, XB]Qilu Univ Technol, Shandong Prov Key Lab Special Silicone Containing, Adv Mat Inst, Shandong Acad Sci, Jinan 250014, Shandong, Peopl 更多
来源：APPLIED SURFACE SCIENCE
关键词：Polyimide(MWCNT) aerogel; Photocatalytic; Oxytetracycline; Stability
摘要：Polyimide (PI) aerogel cross-liked through multi-walled carbon nanotube (MWCNT) has been successfully synthesized by gelation of chemically imidized polyimide in N-methylpyrrolidinone (NMP) solution, followed by ethanol supercritical drying. The as-prepared PI(MWCNT) aerogel photocatalyst with 1 wt% MWCNT content exhibited excellent photocatalytic activity for oxytetracycline (OTC) degradation with a rate constant of 0.144 min(-1), which is 20.6 and 3.3 times as many as that of PI powder and pure PI aerogel, respectively. Characterizations by a series of techniques certified that the enhanced photocatalytic activity of PI(MWCNT)-1% aerogel photocatalyst originated from not only the large specific area and modified band gap, but also the enhanced charge transfer effect because MWCNT can interact with PI through the p-p stacking interaction. The photo-induced electrons can be captured and rapidly transferred by MWCNT, efficiently enhancing the separation efficiency of photo-induced electron-holes.