Constructing novel hyper-crosslinked In2S3@HLZU-1 through molecular expansion for enhanced photocatalytic performance. Issue 11 (12th October 2022)

• Record Type: Journal Article
• Authors: Yang, Huaizhi; Wan, Yuqi; Cheng, Qingrong; Zhou, Hong; Pan, Zhiquan
• Is Part Of: Environmental science. Volume 9:Issue 11(2022)
• Page Start: 4268
• Page End: 4282
• Publication Date: 2022-10-12
• Subjects: Environmental sciences -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d2en00676f
• Languages: English
• ISSNs: 2051-8153

Abstract

Abstract : The strong interfacial interaction between In2 S3 and HLZU-1 with large specific surface area was used for efficient photocatalytic degradation of TC and hydrogen production under visible light. Abstract : A novel hyper-crosslinked In2 S3 @HLZU-1 heterojunction through molecular expansion was carefully designed and fully characterized. This synthetic strategy not only increased the specific surface area and average pore volume of LZU-1 by 11.3 and 3.6 times, respectively, but also greatly enhanced the photocatalytic performance. Under visible light, the catalyst can degrade 90% of 50 ml, 40 ppm TC solution within 1 h, and the maximum hydrogen evolution rate was 11 920.42 μmol g −1 h −1 . SEM, XPS and other characterization techniques proved the existence and the interaction of In2 S3 and HLZU-1. The performance of the heterojunction photocatalyst is mainly attributed to: (i) the matching energy band structure between In2 S3 and HLZU-1, which ensures the effective separation of photogenerated holes and electrons, and (ii) the hyper-crosslinking treatment, which can improve the photo-absorption and photocatalytic properties of the catalyst. A Z-type photocatalytic mechanism was proposed based on radical trapping experiments and electron spin resonance (ESR) analyses. This study developed an effective molecular expansion strategy to synthesize COF-based catalysts with more catalytic sites for potential applications in the environmental and energy fields.