title: Non-metal photocatalyst nitrogen-doped carbon nanotubes modified mpg-C(3)N(4):facile synthesis and the enhanced visible-light photocatalytic activity.
abstract: Nitrogen-doped carbon nanotubes (N-CNT) is a promising metal-free candidate and electronic acceptor. It has been employed to modify mesoporous carbon nitride (mpg-C3N4) for photocatalytic degradation of organic dye and antibiotics under visible-light irradiation. Herein, we report a facile synthesis strategy involving polymerization of cyanamide as the precursor in the presence of N-CNT via thermal polycondensation. The morphology and structure of as-prepared N-CNT/mpg-C3N4were analyzed by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The N-CNT/mpg-C3N4-15 exhibited increased photocatalytic activity for rhodamine B (RhB), methyl orange (MO) and tetracycline hydrochloride (TC) degradation compared with the pure one under visible-light irradiation, which is mainly due to the efficiently separation of photogenerated electron-hole pairs for the introduction of N-CNT as electronic acceptor. The photocatalytic reaction can fit the first order kinetics. Additionally, superoxide radical (O2-) was regarded as main reactive species participating in the photodegradation reaction process. Furthermore, the reason for enhancing photocatalytic activity of N-CNT/mpg-C3N4is mainly attributed to synergistic effects between mpg-C3N4as main ingredient and N-CNT as electron acceptor.
authors.affiliation: School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Jinyuan
authors.initials: J
authors.lastname: Liu
authors.affiliation: School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China.
authors.forename: Yanhua
authors.initials: Y
authors.lastname: Song
authors.affiliation: School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China. Electronic address: xh@ujs.edu.cn.
authors.forename: Hui
authors.initials: H
authors.lastname: Xu
authors.affiliation: School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Xingwang
authors.initials: X
authors.lastname: Zhu
authors.affiliation: School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Jiabiao
authors.initials: J
authors.lastname: Lian
authors.affiliation: School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Yuanguo
authors.initials: Y
authors.lastname: Xu
authors.affiliation: School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Liying
authors.initials: L
authors.lastname: Huang
authors.affiliation: School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Ji
authors.affiliation: School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China. Electronic address: lihm@ujs.edu.cn.
authors.forename: Huaming
authors.initials: H
authors.lastname: Li
keywords: Mesoporous carbon nitride; N-CNT; Photocatalytic activity