首页|Stable LSPR effect and full-spectrum photocatalytic water purification by g-C3N4?x/MoO3?x with passivated interface oxygen vacancies
Stable LSPR effect and full-spectrum photocatalytic water purification by g-C3N4?x/MoO3?x with passivated interface oxygen vacancies
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NSTL
Elsevier
Interface passivation to construct a Z-scheme heterojunction can not only improve the separation efficiency and redox ability of photo-generated carriers, but also retain the excellent optical properties of non-metallic plasma. In this work, the optical performance and carrier dynamics of g-C3N4?x/MoO2.69(OH)0.31 heterojunction were optimized by passivating the interface oxygen vacancies. The adsorption of -OH groups on the surface oxygen vacancy sites of MoO2.69(OH)0.31 was hindered due to the formation of heterogeneous interface. This in turn significantly inhibited the charge recombination at the oxygen vacancy-induced deep trap states, while maintaining the stable and continuously enhanced visible-near infrared light absorption. The conduction band of g-C3N4?x provided the appropriate energy platform to accept the photo-generated electrons of MoO2.69(OH)0.31, resulting in the high utilization of high-energy “hot electrons”. The prepared g-C3N4?x/MoO2.69(OH)0.31 heterojunction showed the enhanced full-solar-spectrum photocatalytic performance for the degradation of the organic pollutants. Moreover, Ti3C2 nanosheet-wrapped g-C3N4?x/MoO3?x was synthesized to alleviate the photo-corrosion of g-C3N4?x/MoO3?x. The composite photocatalyst exhibited the further improved photocatalytic activity while maintaining good recyclability and structural stability. This work provided a new strategy for the preparation of defect-mediated heterojunction photocatalysts with high activity and stability.
Wang M.、Tan G.、Wang Y.、Zhang B.、Feng S.、Dang M.、Ren H.、Lv L.
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Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials School of Materials Science and Engineering Shaanxi University of Science & Technology
School of Arts and Sciences Shaanxi University of Science & Technology
College of Cryptography Engineering Engineering University of PAP
NSTL
Elsevier
