Arjomandi-Behzad Leila, Alinejad Zeinab, Zandragh Mina Ranjbar, Golmohamadi Amir, Vojoudi Hossein
Faculty of Chemistry, Kharazmi University, Tehran, Iran.
College of Health Sciences, West Chester University of Pennsylvania, West Chester, PA, USA.
iScience. 2023 Feb 16;26(3):106213. doi: 10.1016/j.isci.2023.106213. eCollection 2023 Mar 17.
Heterojunction nanostructure construction and morphology engineering are considered to be effective approaches to improve photocatalytic performance. Herein, ternary hierarchical hollow structures consisting of cobalt-aluminum-layered double hydroxide (CoAl-LDH) nanoplates grown on hollow carbon nitride spheres (HCNS) and decorated with N-doped carbon quantum dots (NCQDs) were prepared using a templating method and a subsequent solvothermal process. The obtained HCNS@LDH/NCQD composites presented an improved performance in photocatalytic degradation of tetracycline and inactivation of compared with pure HCNS and LDH under visible light illumination. The enhanced photocatalytic activity of the designed photocatalyst could be attributed to the following reasons: (1) A special hollow structure provides more active sites and has multiple capabilities of light reflection by helping with a high specific surface area that improves the harvesting efficiency of solar light and (2) the strong synergistic effect among the constituents, which promotes separation and transfer of charge carriers and broadens the photo-response range.
异质结纳米结构构建和形貌工程被认为是提高光催化性能的有效方法。在此，采用模板法和后续的溶剂热法制备了由生长在空心氮化碳球（HCNS）上并装饰有氮掺杂碳量子点（NCQD）的钴铝层状双氢氧化物（CoAl-LDH）纳米片组成的三元分级空心结构。与纯HCNS和LDH相比，所制备的HCNS@LDH/NCQD复合材料在可见光照射下对四环素的光催化降解和灭活方面表现出更好的性能。所设计的光催化剂光催化活性增强可归因于以下原因：（1）特殊的空心结构提供了更多的活性位点，并通过高比表面积有助于光反射，提高了太阳光的捕获效率；（2）各组分之间有很强的协同效应，促进了电荷载流子的分离和转移，并拓宽了光响应范围。
