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Construction of a double heterojunction between graphite carbon nitride and anatase TiO2 with co-exposed (101) and (001) faces for enhanced photocatalytic degradation.

ABSTRACT: This study aimed to promote the separation of photogenerated carriers and improve the redox performance of graphite carbon nitride (g-C3N4) by synthesizing a double-heterojunction-structure photocatalyst, g-C3N4/(101)-(001)-TiO2, through the solvothermal method. The photocatalyst comprised a Z-system formed from g-C3N4 and the (101) plane of TiO2, as well as a surface heterojunction formed from the (101) and (001) planes of TiO2. The results showed that g-C3N4/(101)-(001)-TiO2 had strong photocatalytic activity and stable performance in the photodegradation of paracetamol. The active species ·O2 - and ·OH were found to play important roles in the photocatalytic degradation of paracetamol through a radical-quenching experiment. The charge-transfer mechanism was also described in detail. Overall, this work provided a new strategy for the Z-system heterojunction and opened up the application of this structure in the degradation of organic pollutants.

SUBMITTER: Sun J 

PROVIDER: S-EPMC9278525 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature

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Construction of a double heterojunction between graphite carbon nitride and anatase TiO<sub>2</sub> with co-exposed (101) and (001) faces for enhanced photocatalytic degradation.

Sun Jingjing J   Deng Lang L   Sun Jing J   Shen Tingting T   Wang Xikui X   Zhao Rusong R   Zhang Yiyao Y   Wang Baolin B  

RSC advances 20220713 31

This study aimed to promote the separation of photogenerated carriers and improve the redox performance of graphite carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) by synthesizing a double-heterojunction-structure photocatalyst, g-C<sub>3</sub>N<sub>4</sub>/(101)-(001)-TiO<sub>2</sub>, through the solvothermal method. The photocatalyst comprised a Z-system formed from g-C<sub>3</sub>N<sub>4</sub> and the (101) plane of TiO<sub>2</sub>, as well as a surface heterojunction formed from the (101) and  ...[more]

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