Frontiers of Environmental Science & Engineering ( IF 6.1 ) Pub Date : 2022-04-15 , DOI: 10.1007/s11783-022-1566-z Tao Yan 1 , Qianqian Yang 1 , Rui Feng 1 , Yanxia Zhao 1 , Meng Sun 1 , Liangguo Yan 1 , Xiang Ren 2 , Qin Wei 2
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Achieving hydrogen production and simultaneous decomposition of organic pollutants through dual-functional photocatalytic reactions has received increasing attention due to the environmentally friendly and cost-effective characteristics of this approach. In this work, an urchin-like oxygen-doped MoS2/ZnIn2S4 (OMS/ZIS) composite was fabricated for the first time using a simple solvothermal method. The unique microstructure with abundant active sites and fast charge transfer channels further shortened the charge migration distance and compressed carrier recombination. The obtained composite exhibited an efficient H2 evolution reaction rate of 12.8 mmol/g/h under visible light, which was nearly times higher than pristine ZnIn2S4, and the apparent quantum efficiency was 14.9% (420 nm). The results of the simultaneous photocatalytic H2 evolution and organic pollutant decomposition test were satisfactory, resulting in decomposition efficiencies of resorcinol, tetracycline, and bisphenol A that reached 41.5%, 63.5%, and 53.0% after 4 h, respectively, and the highest H2 evolution rate was 672.7 µmol/g/h for bisphenol A. Furthermore, natural organic matter (NOM) abundantly found in actual water was adopted as an electron donor for H production under simulated sunlight irradiation, indicating the promising practicability of simultaneous hydrogen evolution and NOM decomposition. Moreover, the mechanisms of the dual-purpose photocatalytic reactions, as well as the synergistic effect between the molecular structures of the organic pollutants and the corresponding adsorption behavior on the photocatalyst surface were illustrated in detail. These obtained results may serve as an inspiration for the rational design of highly efficient, dual-functional photocatalysts in the future.
中文翻译:
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海胆状氧掺杂 MoS2/ZnIn2S4 复合材料的高效可见光催化析氢和同时降解有机污染物
由于这种方法具有环境友好和成本效益高的特点,通过双功能光催化反应实现产氢和同时分解有机污染物受到越来越多的关注。在这项工作中,首次使用简单的溶剂热法制备了一种海胆状氧掺杂的MoS 2 /ZnIn 2 S 4 (OMS/ZIS)复合材料。具有丰富活性位点和快速电荷转移通道的独特微结构进一步缩短了电荷迁移距离和压缩载流子复合。所获得的复合材料在可见光下表现出 12.8 mmol/g/h 的有效 H 2释放反应速率,几乎是原始 ZnIn 的 1 倍。2 S 4,表观量子效率为14.9%(420 nm)。同时光催化析H 2和有机污染物分解试验结果令人满意,4 h后间苯二酚、四环素和双酚A的分解效率分别达到41.5%、63.5%和53.0%,H 2双酚A的析氢速率为672.7 µmol/g/h。此外,在模拟太阳光照射下,采用实际水中丰富的天然有机物(NOM)作为电子供体生产H,表明同时析氢和NOM具有良好的实用性分解。此外,还详细阐述了两用光催化反应的机理,以及有机污染物分子结构与光催化剂表面相应吸附行为之间的协同作用。这些获得的结果可为未来高效、双功能光催化剂的合理设计提供启示。