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Flower‐like shaped Bi 12 TiO 20 /g‐C 3 N 4 heterojunction for effective elimination of organic pollutants: Preparation, characterization, and mechanism study
Author(s) -
Yu Xinmin,
Zhang Xinyan,
Zhao Jie,
Xu Lei,
Yan Jinghui
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5702
Subject(s) - photocatalysis , rhodamine b , chemistry , heterojunction , visible spectrum , degradation (telecommunications) , graphitic carbon nitride , absorption (acoustics) , adsorption , aqueous solution , chemical engineering , photochemistry , nanotechnology , nuclear chemistry , catalysis , materials science , organic chemistry , optoelectronics , composite material , telecommunications , computer science , engineering
Flower‐like shaped Bi 12 TiO 20 (Bismuth Titanate)/g‐C 3 N 4 (graphite‐like carbon nitride) heterojunction was prepared through hydrothermal and sonification methods for the degradation of organic pollutants by visible‐light irradiation. The preparation process, chemical structures, and the mechanism of photocatalytic enhancement of the heterostructures were studied systematically. Under visible‐light irradiation, the novel flower‐like shaped Bi 12 TiO 20 /g‐C 3 N 4 heterojunction demonstrates prominent activities for the degradation of rhodamine B and p ‐nitrophenol, with the introduction of flower‐like shaped Bi 12 TiO 20 into g‐C 3 N 4 composites greatly increasing the activity of pure g‐C 3 N 4 . This activity enhancement for the heterojunction could be mainly attributed to its low recombination speed of electron–hole pairs, high adsorption ability of organic pollutants, and better optical absorption ability. Moreover, in the visible‐light system of Bi 12 TiO 20 /g‐C 3 N 4 , • OH also contributed to the degradation of pollutants, which may explain the enhanced photocatalytic activity after the introduction of Bi 12 TiO 20, as • OH is inactive in pure g‐C 3 N 4 . Furthermore, 10 wt.% Bi 12 TiO 20 /g‐C 3 N 4 showed not only high activity but also good stability for degradation of aqueous organic pollutants, implying potential applications prospect.