title: Chemical-Bond-Mediated p-n Heterojunction Photocatalyst Constructed from Coordination Polymer Nanoparticles and a Conducting Copolymer: Visible-Light Active and Highly Efficient.
abstract: A visible-light-active p-n heterojunction photocatalyst has been synthesized by the enwrapping of poly[aniline-co-N-(4-sulfophenyl)aniline] (PAPSA) on a coordination polymer nanoparticle (NCP). Compared with the visible-light-inactive NCP, the new p-n heterojunction photocatalyst, PAPSA/NCP, exhibits a much higher efficiency in the reduction of Cr(VI) under visible light. PAPSA performs two functions in this p-n heterojunction photocatalyst. First, as a visible-light-active material, it extends the photoresponse region of the photocatalyst from the ultraviolet to the visible-light region. Secondly, as a p-type semiconductor possessing suitable energy levels with respect to NCP, PAPSA forms a p-n heterojunction with the n-type NCP; the inner electric field of the p-n heterojunction accelerates the separation of electrons and holes, which enhances the photocatalytic efficiency. Furthermore, the p-n heterojunction photocatalyst exhibits outstanding stability during the photocatalytic reduction of Cr(VI) .
authors.affiliation: Department of Chemistry, College of Science, Northeast University, Shenyang, Liaoning Province, 110819 (P.R. China), Fax: (+86) 024-23600159.
authors.forename: Xinxin
authors.initials: X
authors.lastname: Xu
authors.affiliation: Department of Chemistry, College of Science, Northeast University, Shenyang, Liaoning Province, 110819 (P.R. China), Fax: (+86) 024-23600159.
authors.forename: Tingting
authors.initials: T
authors.lastname: Lu
authors.affiliation: Department of Chemistry, College of Science, Northeast University, Shenyang, Liaoning Province, 110819 (P.R. China), Fax: (+86) 024-23600159. xxliu@mail.neu.edu.cn.
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Chemistry, Bohai University, Jinzhou, Liaoning Province, 121013 (P.R. China), Fax: (+86) 0416-3400158. wangxl@bhu.edu.cn.
authors.forename: Xiuli
authors.initials: X
authors.lastname: Wang
keywords: chromium; conducting materials; nanoparticles; photocatalysts; polymers; reduction