title: Solvothermal-assisted synthesis of self-assembling TiO2nanorods on large graphitic carbon nitride sheets with their anti-recombination in the photocatalytic removal of Cr(vi) and rhodamine B under visible light irradiation.
abstract: TiO2-based nanorods (TNRs) were self-assembled on large graphitic carbon nitride (g-C3N4) sheets via the solvothermal-assisted route. The results demonstrated that the effective anchoring of TNRs (a side length of ca. 200-300 nm) was highly dispersed on the surface of whole g-C3N4sheets. The shift in the Ti 2p XPS core level spectrum indicated an increase in the net positive charge of the Ti ions, ensuring the formation of an interface between TNRs and g-C3N4. The charge transferred from g-C3N4sheets to TNRs effectively prevented the recombination of excited charges, which is consistent with the significant quenching of PL. The extent of visible-light-sensitive photocatalytic (PC) activity was evaluated by the removal of potassium dichromate (Cr(vi)) or the degradation of rhodamine B (RhB). The photocatalytic removal of Cr(vi) using RhB was effectively improved. The synergistic effect between the removal of Cr(vi) and degradation of RhB was revealed by multiple utilization of TNRs/g-C3N4for PC activity. The effective suppression of the recombination of photo-induced charges and the absorption of RhB was responsible for the enhancement in the PC activity. An alternate mechanism for enhanced visible-light photocatalytic activity was also considered.
authors.affiliation: Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China. fangpf@whu.edu.cn.
authors.forename: Dingze
authors.initials: D
authors.lastname: Lu
authors.affiliation: Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China. fangpf@whu.edu.cn.
authors.forename: Pengfei
authors.identifier: http://orcid.org/0000-0001-6836-0318
authors.initials: P
authors.lastname: Fang
authors.affiliation: Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China. fangpf@whu.edu.cn.
authors.forename: Wenhui
authors.initials: W
authors.lastname: Wu
authors.affiliation: Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China. fangpf@whu.edu.cn.
authors.forename: Junqian
authors.initials: J
authors.lastname: Ding
authors.affiliation: Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China. fangpf@whu.edu.cn.
authors.forename: Lulu
authors.initials: L
authors.lastname: Jiang
authors.affiliation: Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China. fangpf@whu.edu.cn.
authors.forename: Xiaona
authors.initials: X
authors.lastname: Zhao
authors.affiliation: Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China. fangpf@whu.edu.cn.
authors.forename: Chunhe
authors.initials: C
authors.lastname: Li
authors.affiliation: Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China. fangpf@whu.edu.cn.
authors.forename: Minchen
authors.initials: M
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, P.R. China.
authors.forename: Yuanzhi
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China. fangpf@whu.edu.cn.
authors.forename: Dahai
authors.initials: D
authors.lastname: Wang