Novel organo modified MoCdS3 heterojunctions for enhancement of photocatalytic activity: The synergistic effects of surface modification and fast photogenerated carrier transfer
Novel organo modified MoCdS3 heterojunctions for enhancement of photocatalytic activity: The synergistic effects of surface modification and fast photogenerated carrier transfer
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用于增强光催化活性的新型有机改性MoCdS3异质结：表面改性和快速光生载流子转移的协同效应
DOI：
10.1016/j.apsusc.2019.07.018
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发表时间：
2019-11
影响因子：
6.7
通讯作者：
Gu Cheng
中科院分区：
文献类型：
--
作者：
Chen Zhanghao;Li Chen;Mi Na;Wu Hao;Sheng Feng;Ling Jingyi;Gu Cheng
半导体异质结具有快速的光生载流子转移特性，在环境修复方面具有巨大的潜力。然而，迄今为止报道的大多数半导体异质结是表面疏脂的，并且对大多数亲脂性有机污染物具有低亲和力。本文采用水热法结合自组装技术合成了十六烷基三甲基溴化铵（HDTMA）表面活性剂修饰的MoCdS 3光催化剂（HDTMA-MoCdS 3）。通过SEM-EDS、HRTEM、XRD、FTIR、XPS、拉曼光谱和光学接触角等测试手段对晶体异质结的结构和表面性质进行了表征。进一步的光电化学测试证明了HDTMA MoCdS 3的光生载流子分离性能上级块状CdS和MoS 2。以双酚A和甲基橙子为模型污染物，考察了HDTMA-MoCdS 3的捕集性能和光催化性能。HDTMA-MoCdS 3复合材料具有快速吸附污染物和高的光生载流子转移能力的协同效应，表现出优异的光催化降解有机污染物的活性和稳定性。
Semiconductor heterojunctions with fast photogenerated carrier transfer have great potential for environmental remediation. However, most of the semiconductor heterojunctions reported so far are surface lipophobic and have low affinity for most lipophilic organic pollutants. Herein, we developed a facile hydrothermal method coupled with a self-assembly strategy to synthesize a novel MoCdS3photocatalyst modified by hexadecyl trimethyl ammonium bromide (HDTMA) surfactant (HDTMA-MoCdS3). Detailed characterizations, including SEM-EDS, HRTEM, XRD, FTIR, XPS, Raman spectroscopy and optical contact angle, were carried out to confirm the structure and surface properties of the crystalline heterojunction. Further photoelectrochemical tests proved the superior performance of HDTMA-MoCdS3for separation of photogenerated carriers compared to bulk CdS and MoS2. Bisphenol A and methyl orange were chosen as the model pollutants to investigate the capture performance and further photocatalytic ability of HDTMA-MoCdS3. By synergistic effect of rapid adsorption of pollutants and high capacity for photogenerated carrier transfer, the HDTMA-MoCdS3composites exhibit outstanding activity and stability for photodegradation of organic contaminants.
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DOI：
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发表时间：
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期刊：
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