Highly efficient visible-light photocatalytic performance of MOFs-derived TiO2 via heterojunction construction and oxygen vacancy engineering

• Published in: Chemical physics letters 2023-03, Vol.815, p.140365, Article 140365
• Main Authors: Chen, Yue, Liu, Huan, Hu, Liang, Shen, Youliang, Qiu, Lingfang, Zhu, Liezhen, Shi, Qianxiang, Xu, Xun, Li, Ping, Duo, Shuwang
• Format: Article
• Language: English
• Subjects: Heterojunction; Metal–organic frameworks; Oxygen vacancy; TiO2; ZnIn2S4
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2023.140365

[Display omitted] •ZnIn2S4/TiO2 composite was prepared using self-sacrificial template method followed by aninsitugrowthprocess.•Z-scheme heterojunction ZnIn2S4/TiO2-x was successfully synthesized by NaBH4 reduction method.•ZnIn2S4/TiO2-x heterojunction exhibited significantly enhanced photocatalytic degradation performance. Novel Z-scheme ZnIn2S4/TiO2-x photocatalyst was successfully fabricated through self-sacrificing template-chemical bath deposition combined with a NaBH4 reduction method for the first time. It was found that ZnIn2S4/TiO2-x exhibited high-efficient visible-light photocatalytic RhB degradation of 91 % within 40 min, which was almost 45.5, 1.2, and 6.1 times better than that of TiO2, ZnIn2S4/TiO2, and TiO2-x, respectively. Moreover, an obscure change in catalytic activity can be observed after five recycles. The excellent photocatalytic performance can be attributed to the synergistic effect of Ov, ZnIn2S4, and MOF-derived TiO2, which extend the visible-light photoresponse range and promote the separation of photo-generated charge carriers.