Hierarchical CdIn2S4 microspheres wrapped by mesoporous g-C3N4 ultrathin nanosheets with enhanced visible light driven photocatalytic reduction activity
Hierarchical CdIn2S4 microspheres wrapped by mesoporous g-C3N4 ultrathin nanosheets with enhanced visible light driven photocatalytic reduction activity
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介孔g-C3N4超薄纳米片包裹的分级CdIn2S4微球具有增强的可见光驱动光催化还原活性
DOI：
10.1016/j.jhazmat.2016.08.025
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发表时间：
2016-12-15
影响因子：
13.6
通讯作者：
Chen, Shen-Ming
中科院分区：
文献类型：
--
作者：
Chen, Wei;Huang, Ting;Chen, Shen-Ming
本研究首次采用一锅法水热合成了一系列分级结构的CdIn 2S 4/g-C3 N4纳米复合材料，其中介孔g-C3 N4纳米片原位自包裹在CdIn 2S 4纳米片上。采用XRD、FT-IR、UV-vis DRS、SEM、TEM、HAAF-STEM、XPS、光电化学测试等手段对材料进行了系统表征，分析了材料的物相结构、化学组成、形貌及光催化机理。应用光氧化还原反应和光催化分解水反应评价了CdIn 2S 4/g-C3 N4纳米复合材料的光催化活性。结果表明，CdIn 2S 4/g-C3 N4异质结构在4-NA光还原为4-PDA和水分解产生H2-的光催化性能方面比其他异质结构有更大的提高，这是由于异质结构的紧密界面接触，促进了光生空穴和电子的分离。同时，由于CdIn_2S_4/g-C_3 N_4纳米复合材料具有良好的表面包覆性，其光催化稳定性显著提高。该研究为制备高效率、高稳定性的光催化剂提供了一条新的途径，并拓展了CdIn 2S 4在精细化工中的应用。(C)2016爱思唯尔B. V.保留所有权利。
In this investigation, a series of hierarchical CdIn2S4/g-C3N4 nanocomposites were firstly synthesized by a facile one-pot hydrothermal strategy, wherein the mesoporous g-C3N4 nanosheets were in-situ self-wrapped onto CdIn2S4 nanosheets. Systematic characterization by XRD, FT-IR, UV-vis DRS, SEM, TEM, HAAF-STEM, XPS, photoelectrochemical tests were employed to analyze the phase structure, chemical composition, morphology and photocatalytic mechanism. The application, including photo-redox reaction and photocatalytic water splitting, were used to estimate the photocatalytic activity of as obtained CdIn2S4/g-C3N4 nanocomposites. The results indicate that CdIn2S4/g-C3N4 heterostructures exhibit more efficient improvement of the photocatalytic performances towards photo-reduction of 4-NA to corresponding 4-PDA and photocatalytic H-2 generation from water splitting than these counterparts as results of construction of intimate interfacial contact, which would promote the separation of photo-generated holes and electrons. Meanwhile, benefitting from the excellent surface wrap, the CdIn2S4/g-C3N4 nanocomposites possess notable enhanced photocatalytic stability. This research may provide a promising way to fabricate highly efficient photo catalysts with excellent stability and expand the application of CdIn2S4 in fine chemical engineering. (C) 2016 Elsevier B.V. All rights reserved.