Institute of Environmental Research at Greater Bay Area; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education; Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou 510006, China.
Department of Gastroenterology and Hepatology, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou 510180, China.
ACS Appl Mater Interfaces. 2020 Jun 3;12(22):25494-25502. doi: 10.1021/acsami.0c06601. Epub 2020 May 22.
Creatively constructing Z-scheme composites is a promising and common strategy for designing effective photocatalyst systems. Herein, we synthesized Z-scheme FeO@Ag-ZnO@C heterostructures from the Fe-MOFs and applied it to photodegradation of tetracycline and methylene blue pollutants in wastewater. The optimized sample exhibits a remarkable performance as well as stability under visible light irradiation. The calculating and experimental results demonstrate that the FeO@ZnO nanointerface and carbon sheath together boost the transfer efficiency of photogenerated carriers and absorption ability, thereby improving the photocatalytic activity. Furthermore, detailed mechanism investigation reveals the pivotal role of reactive oxygen species (OH and O) generated, resulting in remarkable performance. In addition, cell biology experiments reveal that the wastewater after photocatalytic treatment has good biological compatibility, which is important for applications. This work provides valuable information for constructing high-performance Z-scheme photocatalysts from MOFs for environmental treatment.
创造性地构建 Z 型复合材料是设计有效光催化剂系统的一种有前途且常见的策略。在此，我们从 Fe-MOFs 合成了 Z 型 FeO@Ag-ZnO@C 异质结构，并将其应用于废水四环素和亚甲基蓝污染物的光降解。优化后的样品在可见光照射下表现出显著的性能和稳定性。计算和实验结果表明，FeO@ZnO 纳米界面和碳壳共同提高了光生载流子的转移效率和吸收能力，从而提高了光催化活性。此外，详细的机理研究揭示了活性氧物种（OH 和 O）的生成所起的关键作用，从而实现了优异的性能。此外，细胞生物学实验表明，光催化处理后的废水具有良好的生物相容性，这对于应用非常重要。这项工作为从 MOFs 构建用于环境处理的高性能 Z 型光催化剂提供了有价值的信息。
