title: UV and visible light synergetic photodegradation using rutile TiO2nanorod arrays based on a p-n Junction.
abstract: Herein, we report a photocatalytic heterojunction device of rutile TiO2nanorod arrays based on a p-n silicon junction (TiO2@PN) and its full absorption of ultraviolet and visible light for synergistic photodegradation. The fabricated TiO2@PN had excellent photocatalytic degradation of methyl orange (MO) under irradiation of a 300 W Xe lamp, and its pseudo-first-order rate constant k was 0.221 h-1, which was greatly higher than that for TiO2nanorod arrays based on an n-p silicon junction (TiO2@NP, 0.078 h-1) and glass (TiO2@G, 0.032 h-1). The higher photocatalytic performance of TiO2@PN could be attributed to the fact that the photovoltage (PV) of the p-n junction promotes separation of the electron-hole pairs of the TiO2, and the holes are thus left within the TiO2nanorods to produce a strong oxidant of hydroxyl radicals (˙OH). Moreover, this heterojunction device could be easily fabricated in a large size for easy recovery and recycling, which shows its promise in the solar-driven degradation of environmental pollution.
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. hu.junqing@dhu.edu.cn rjzou@dhu.edu.cn and School of Fundamental Studies, Shanghai University of Engineering Science, Shanghai, 201620, China. syg021@sues.edu.cn.
authors.forename: Tao
authors.initials: T
authors.lastname: Ji
authors.affiliation: School of Fundamental Studies, Shanghai University of Engineering Science, Shanghai, 201620, China. syg021@sues.edu.cn.
authors.forename: Ze
authors.initials: Z
authors.lastname: Cui
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. hu.junqing@dhu.edu.cn rjzou@dhu.edu.cn.
authors.forename: Wenlong
authors.initials: W
authors.lastname: Zhang
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. hu.junqing@dhu.edu.cn rjzou@dhu.edu.cn.
authors.forename: Yunjiu
authors.initials: Y
authors.lastname: Cao
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. hu.junqing@dhu.edu.cn rjzou@dhu.edu.cn.
authors.forename: Yongfang
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. hu.junqing@dhu.edu.cn rjzou@dhu.edu.cn.
authors.forename: Shu-Ang
authors.initials: SA
authors.lastname: He
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. hu.junqing@dhu.edu.cn rjzou@dhu.edu.cn.
authors.forename: Mingdong
authors.initials: M
authors.lastname: Xu
authors.affiliation: School of Fundamental Studies, Shanghai University of Engineering Science, Shanghai, 201620, China. syg021@sues.edu.cn.
authors.forename: Yangang
authors.initials: Y
authors.lastname: Sun
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. hu.junqing@dhu.edu.cn rjzou@dhu.edu.cn.
authors.forename: Rujia
authors.identifier: http://orcid.org/0000-0001-5566-5091
authors.initials: R
authors.lastname: Zou
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. hu.junqing@dhu.edu.cn rjzou@dhu.edu.cn.
authors.forename: Junqing
authors.identifier: http://orcid.org/0000-0001-8422-7250
authors.initials: J
authors.lastname: Hu