PDF(Pubmed)
Abstract：
Developing a low-cost and highly efficient semiconductor photocatalyst for the decomposition of organic pollutants and antibiotics is highly desirable. Herein, FeOOH nanosheets were prepared using a liquid-phase stirring technique and combined with ZnCdS (ZCS) nanoparticles to construct FeOOH/ZCS nanocomposite photocatalysts. The photocatalytic efficiency of the FeOOH/ZCS nanocomposite was evaluated for the decomposition of various pollutants, including rhodamine B, methylene Blue, and tetracycline. The FeOOH/ZCS nanocomposite exhibited significantly higher photocatalytic performance for the decomposition of various organics. Moreover, the optimized FeOOH/ZCS retained more than 90% of its initial photocatalytic activity even after five successful runs. Radical quenching test and electron spin resonance (ESR) analysis revealed that hydroxyl radicals (•OH) play a dominant role for the decomposition of organics. The FeOOH/ZCS Z-scheme heterojunction significantly facilitates higher charge transfer efficiency and the generation of reactive radicals, resulting in excellent photocatalytic degradation performance. This work offers a new approach to synthesis FeOOH-based photocatalyst for the elimination of organics and antibiotics in water.
摘要：
开发用于分解有机污染物和抗生素的低成本和高效的半导体光催化剂是非常期望的。在这里，使用液相搅拌技术制备FeOOH纳米片，并与ZnCdS（ZCS）纳米颗粒结合以构建FeOOH/ZCS纳米复合光催化剂。评估了FeOOH/ZCS纳米复合材料的光催化效率，用于分解各种污染物，包括罗丹明B,亚甲蓝,还有四环素.FeOOH/ZCS纳米复合材料对各种有机物的分解表现出较高的光催化性能。此外，优化的FeOOH/ZCS即使在五次成功运行后仍保留了其初始光催化活性的90％以上。自由基猝灭测试和电子自旋共振（ESR）分析表明，羟基自由基（•OH）在有机物的分解中起着主导作用。FeOOH/ZCSZ方案异质结显着促进更高的电荷转移效率和反应性自由基的产生，优异的光催化降解性能。这项工作为合成基于FeOOH的光催化剂提供了一种新的方法，以消除水中的有机物和抗生素。
