Construction of flower-like MoS2/Ag2S/Ag Z-scheme photocatalysts with enhanced visible-light photocatalytic activity for water purification.
Construction of flower-like MoS2/Ag2S/Ag Z-scheme photocatalysts with enhanced visible-light photocatalytic activity for water purification.
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DOI：
10.1016/j.scitotenv.2018.12.333
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发表时间：
2019-04
期刊：
影响因子：
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通讯作者：
Yingfeng Zeng;Na Guo;Haiyan Li;Quanying Wang;Xingjian Xu;Yong Yu;Xuerong Han;Hongwen Yu
中科院分区：
文献类型：
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作者：
Yingfeng Zeng;Na Guo;Haiyan Li;Quanying Wang;Xingjian Xu;Yong Yu;Xuerong Han;Hongwen Yu
首次成功设计并合成了花状MoS 2/Ag 2S/Ag纳米复合材料。所制备的MoS 2/Ag 2S/Ag纳米复合材料作为一种新型光催化剂，对刚果红（CR）、盐酸四环素（TC-HCl）的光催化降解和铜绿假单胞菌（P. aeruginosa）的消毒杀菌具有良好的光催化性能。对于TC-HCl的光催化降解，考察了初始溶液pH值和光催化剂用量对降解效果的影响。此外，还通过GC-MS分析验证了TC-HCl光降解的中间产物，并提出了TC-HCl光降解的可能途径。电子顺磁共振（EPR）技术和俘获实验证实了电子输运路径为Z-图式系统（PS-C-PS）。其中，Ag作为电子介体提高了电子的传输速率，加快了光生载流子的分离效率。
Flower-like MoS2/Ag2S/Ag nanocomposites have been elaborately designed and synthesized successfully for the first time. The prepared MoS2/Ag2S/Ag nanocomposites as a novel photocatalysts present effective photocatalytic performance for the photodegradation of congo red (CR), tetracycline hydrochloride (TC-HCl) and disinfection forPseudomonasaeruginosa(P. aeruginosa). For the photodegradation of TC-HCl, the effect of the pH of the initial solution and photocatalysts dosage was investigated. Furthermore, intermediates of TC-HCl degradation were verified by GC–MS analysis and the possible pathway of the photodegradation was also proposed. The electron paramagnetic resonance (EPR) technique and trapping experiments verified the electron transport path is Z-scheme system (PS-C-PS). Among them, Ag as an electron mediator enhanced the electron transmission rate and accelerated the separation efficiency of photogenerated carriers.