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Constructing novel hyper-crosslinked In2S3@HLZU-1 through molecular expansion for enhanced photocatalytic performance
Environmental Science: Nano ( IF 7.3 ) Pub Date : 2022-09-27 , DOI: 10.1039/d2en00676f
Huaizhi Yang, Yuqi Wan, Qingrong Cheng, Hong Zhou, Zhiquan Pan

A novel hyper-crosslinked In2S3@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 In2S3 and HLZU-1. The performance of the heterojunction photocatalyst is mainly attributed to: (i) the matching energy band structure between In2S3 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.

中文翻译:

通过分子膨胀构建新型超交联 In2S3@HLZU-1 以增强光催化性能

一种通过分子膨胀的新型超交联 In 2 S 3 @HLZU-1 异质结经过精心设计和充分表征。这种合成策略不仅使 LZU-1 的比表面积和平均孔容分别增加了 11.3 倍和 3.6 倍,而且大大提高了光催化性能。在可见光下,该催化剂可在1 h内降解90%的50 ml、40 ppm TC溶液,最大析氢速率为11 920.42 μmol g -1 h -1。SEM、XPS等表征技术证明了In 2 S 3的存在和相互作用和 HLZU-1。异质结光催化剂的性能主要归因于:(i)In 2 S 3和HLZU-1之间的匹配能带结构,确保了光生空穴和电子的有效分离,以及(ii)超交联处理,可以提高催化剂的光吸收和光催化性能。基于自由基捕获实验和电子自旋共振(ESR)分析,提出了一种Z型光催化机制。本研究开发了一种有效的分子扩展策略来合成具有更多催化位点的 COF 基催化剂,在环境和能源领域具有潜在应用。
更新日期:2022-09-27
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