Enhancement of photocatalysis performance of CdIn2S4/g-C3N4 heterojunction by H2O2 synergism

Yuzhen Li, Haohao Huo, Xiaojin Wang, Yunsheng Xia, Aiming Zhang, Lizhen Gao

    Research output: Contribution to journalArticle

    Abstract

    A highly efficient binary CdIn2S4/g-C3N4 heterojunction photocatalyst was synthesized by a simple wet impregnation method. Photocatalytic system based on the synergistic action of binary CdIn2S4/g-C3N4 heterojunction and H2O2 was proposed to improve the degradation effect of dyes. The photocatalytic activity was evaluated by the degradation of methyl orange(MO) under visible light irradiation. The results demonstrated that contrasted to pure g-C3N4, the synthesized heterojunction can significantly improve the photocatalytic activity. After 120 min of irradiation by visible light, the photocatalytic efficiency of MO degradation of 7CIS/CN was 3.13 times higher than that of g-C3N4. When 60 mM H2O2 was added on this basis, the photocatalytic efficiency increased from 93.81 to 99.40%. The improvement of photocatalytic activity is attributed to the formation of binary CdIn2S4/g-C3N4 heterojunction to promote the transfer of photogenerated electron-hole pairs, and an appropriate amount of H2O2 as an electron trap further reduced the recombination rate of photogenerated electron-hole pairs. Active species capture experiments showed that ·O2 are the main active substances. Subsequently, the mechanism of photocatalytic degradation was proposed. This work provided a new efficient strategy for the degradation of industrial dye wastewater.

    Original languageEnglish
    JournalJournal of Materials Science: Materials in Electronics
    DOIs
    Publication statusE-pub ahead of print - 24 May 2021

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