AgInS2/g-C3N4复合材料光催化降解邻二氯苯性能

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摘要以g-C₃N₄纳米片为模板，通过水热法原位合成高催化活性的AgInS₂/g-C₃N₄复合光催化材料，采用扫描电子显微镜（SEM）、X射线衍射（XRD），X射线光电子能谱（XPS），荧光光谱（PL）和表面光电压（SPV）等表征手段对材料物理、化学性能进行表征，并以邻二氯苯（o-DCB）为目标污染物研究其光催化性能.结果表明：AgInS₂成功负载到g-C₃N₄纳米片上，其组成的复合材料拓宽了光吸收范围，提高了光生电子-空穴迁移效率且降低了复合率；在可见光照射8h后气相o-DCB的光催化降解效率达到62.7%，动力学参数分别是g-C₃N₄纳米片和AgInS₂的2.13倍和1.76倍.利用原位红外光谱技术和ESR技术推导其反应机理，发现降解过程中产生了超氧自由基活性氧物种，降解的最终产物是二氧化碳、水等.

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	王新
	熊巍
	王金
	康敏辉
	李新勇
	石勇

关键词 ： AgInS₂, g-C₃N₄, 光催化, 邻二氯苯

Abstract：AgInS₂/g-C₃N₄ photocatalysts had been synthesized by one-step hydrothermal method using g-C₃N₄ nanosheets as the template. The physical and chemical properties of the photocatalysts had been characterized by SEM, XRD, XPS, PL and SPV. The results indicated that AgInS₂ had been successfully loaded onto the surface of g-C₃N₄. The construction of the composites could broaden the light absorption range, improve the migration efficiency of photogenerated electron-hole pairs and reduce their recombination rate. The photocatalytic performance of the AgInS₂/g-C₃N₄ composites had been evaluated by using o-dichlorobenzene (o-DCB) as a simulated pollutant. The photodegradation efficiency of o-DCB by AgInS₂/g-C₃N₄ composites reached 62.7% under the irradiation of visible light for 8h, which was 2.13 and 1.76 times than those of g-C₃N₄ nanosheets and AgInS₂, respectively. The FTIR and ESR techniques had been used to understanding the reaction mechanism. It was found that superoxide radical activity was generated during the degradation process and the final products were carbon dioxide, water, et al.

Key words： AgInS₂ g-C₃N₄ photocatalysis o-dichlorobenzene

收稿日期: 2019-04-11

PACS:

X511

基金资助:中央高校基本科研业务费资助项目（DUT19RC（4）005）

通讯作者: 熊巍,讲师,xiongwei@dlut.edu.cn E-mail: xiongwei@dlut.edu.cn

作者简介: 王新(1992-),女,辽宁大连人,大连理工大学硕士研究生,主要从事大气污染控制方面的研究.

引用本文:

王新, 熊巍, 王金, 康敏辉, 李新勇, 石勇. AgInS₂/g-C₃N₄复合材料光催化降解邻二氯苯性能[J]. 中国环境科学, 2019, 39(11): 4697-4703. WANG Xin, XIONG Wei, WANG Jin, KANG Min-hui, LI Xin-yong, SHI Yong. Photocatalytic degradation of o-dichlorobenzene by AgInS₂/g-C₃N₄ composites. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4697-4703.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2019/V39/I11/4697

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