Open AccessPorous g-C3N4 with defects for the efficient dye photodegradation under visible light
Author(s) -
Jing Chen,
Yage Zhang,
Baofan Wu,
Zhichao Ning,
Miaoyan Song,
Haifeng Zhang,
Xuzhuo Sun,
Dongjin Wan,
Bo Li
Publication year - 2021
Publication title -
water science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.406
H-Index - 137
eISSN - 1996-9732
pISSN - 0273-1223
DOI - 10.2166/wst.2021.313
Subject(s) - graphitic carbon nitride , photodegradation , rhodamine b , photocatalysis , materials science , porosity , degradation (telecommunications) , visible spectrum , photochemistry , chemical engineering , breakage , methyl orange , band gap , chemistry , optoelectronics , catalysis , composite material , organic chemistry , telecommunications , computer science , engineering
Porous graphitic carbon nitride (p-C3N4) was fabricated via simple pyrolyzing treatment of graphitic carbon nitride (g-C3N4). The defects could be introduced into the structure of g-C3N4 by breakage of some bonds, which was beneficial for the generation of electron–hole pairs and inhibiting their recombination. Compared with g-C3N4, p-C3N4 showed a narrow band gap to promote the utilization of visible light. Furthermore, the porous structure also increased the specific surface area to maximize the exposure of active sites and promote mass transfer during photodegradation. As a result, the as-reported p-C3N4 exhibited considerably higher degradation efficiency for Rhodamine B (RhB) and Methyl Orange (MO) than that of the original g-C3N4. Moreover, the photocatalyst showed high durability and stability in recycling experiments.
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