MOF-based In2S3-X2S3 (X = Bi; Sb)@TFPT-COFs hybrid materials for enhanced photocatalytic performance under visible light
MOF-based In2S3-X2S3 (X = Bi; Sb)@TFPT-COFs hybrid materials for enhanced photocatalytic performance under visible light
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DOI：
10.1016/j.apsusc.2019.06.247
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发表时间：
2019-11
影响因子：
6.7
通讯作者：
Kehui Xue;R. He;Tianli Yang;Jing Wang;Renrui Sun;Lin Wang;Xianglin Yu;Uche Omeoga;S. Pi
中科院分区：
文献类型：
--
作者：
Kehui Xue;R. He;Tianli Yang;Jing Wang;Renrui Sun;Lin Wang;Xianglin Yu;Uche Omeoga;S. Pi
以MOFs为前驱体，采用界面离子交换法合成了一种新型的MOFs基In 2S 3-X2 S3（X = Bi; Sb）@TFPT-COFs杂化催化材料。通过C双键N键将异质结与TFPT-COFs结合制备了杂化材料。异质结表面氨基的功能化是构建MOFs@COFs杂化材料的关键步骤。所得样品是具有均匀纳米级界面接触的分级管状纳米结构。Bi 3+或Sb 3+的掺杂进一步促进了异质结的构建，降低了In 2S 3的带隙值，扩展了光吸收范围。In_2S_3-X_2S_3（X = Bi; Sb）骨架与三嗪骨架之间的协同效应有利于加速电荷的传输和分离。异质结的光腐蚀也可以通过封装的TFPT-COFs片来防止。结果表明，TFPT-COFs的引入显著提高了对六价铬、丽春红-4 R和罗丹明B的光催化降解能力。特别是In 2S 3-Sb 2S 3 @TFPT-COFs表现出优异的光催化还原活性。大约100%的Cr（VI）水溶液在仅5分钟内被光还原。结合UV-Vis吸收光谱和ESR谱的实验结果，提出了该光催化体系优异光催化性能的可能机理。
A novel catalytic material of MOF-based In2S3-X2S3(X = Bi; Sb)@TFPT-COFs hybrids was designed and synthesized by using an interface ion-exchange method with MOFs as the precursors. The hybrid materials were fabricated by combining heterojunctions with TFPT-COFs through Cdouble bondN bonds. The functionalization of the amino groups on the heterojunction surface was a crucial step to construct the MOFs@COFs hybrid materials. The resulting samples were hierarchical tubular nanostructures with uniform nano-scale interfacial contacts. The doping of Bi3+or Sb3+further facilitated the construction of heterojunctions to reduce the band gap value of In2S3and extended light absorption range. The synergistic effect between the frameworks contained in In2S3-X2S3(X = Bi; Sb) and the triazine frameworks of TFPT-COFs was conducive to accelerating charge transportation and separation. The photo-erosion of heterojunctions could also be prevented by the encapsulated TFPT-COFs sheets. Noteworthily, the photocatalytic degradation abilities of hexavalent chromium, ponceau-4R and rhodamine B were significantly improved after the introduction of TFPT-COFs. Especially, In2S3-Sb2S3@TFPT-COFs performed excellent photocatalytic reduction activity. Approximately 100% of aqueous Cr(VI) was photo-reduced within only 5 min. Based on the experimental results of UV–Vis adsorption spectra and ESR spectra, a possible mechanism was proposed to explain the excellent photocatalytic performance of the photocatalytic system.