College of Tobacco Science of Guizhou University, Guizhou Key Laboratory for Tobacco Quality, Guiyang, China.
National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, China.
Pest Manag Sci. 2023 Dec;79(12):5140-5151. doi: 10.1002/ps.7715. Epub 2023 Sep 6.
The utilization of non-metallic inorganic nanomaterials for antimicrobial photocatalytic technology has emerged as a promising approach to combat drug-resistant bacteria. Recently, g-C N nanosheets have attracted significant attention due to their exceptional stability, degradability, low cost, and remarkable antibacterial properties. In this study, a facile electrostatic self-assembly approach was utilized to functionalize ZnO nanoparticles with g-C N nanosheets, resulting in the formation of g-C N @ZnO nanoparticle composites.
The Z-shaped heterojunction architecture of these composites facilitates efficient separation of photogenerated electron-hole pairs and enhances visible light catalytic performance. Moreover, the formation of the g-C N @ZnO heterostructure showed a higher photocatalytic capacity and the generation of reactive oxygen species (ROS) than g-C N nanosheets. The photocatalytic antibacterial mechanisms of g-C N @ZnO at the transcriptomic level primarily involve disrupting bacterial membrane synthesis and inhibiting motility and energy metabolism. Therefore, the antibacterial mechanism of g-C N @ZnO can be attributed to a combination of physical membrane damage, chemical damage (ROS enhancement) and inhibition of chemotaxis, biofilm formation and flagellar motility.
These findings collectively provide novel high potential and insights into the practical application of photocatalysts in plant disease management. © 2023 Society of Chemical Industry.
利用非金属无机纳米材料进行抗菌光催化技术已成为对抗耐药菌的一种有前途的方法。最近，由于 g-C3N4纳米片具有出色的稳定性、可降解性、低成本和显著的抗菌性能而引起了人们的极大关注。在这项研究中，采用简便的静电自组装方法将 g-C3N4纳米片功能化到 ZnO 纳米粒子上，形成 g-C3N4@ZnO 纳米颗粒复合材料。
这些复合材料的 Z 型异质结结构促进了光生电子-空穴对的有效分离，并提高了可见光催化性能。此外，g-C3N4@ZnO 异质结构的形成表现出比 g-C3N4纳米片更高的光催化能力和活性氧（ROS）的产生。g-C3N4@ZnO 的光催化抗菌机制在转录组水平上主要涉及破坏细菌膜合成以及抑制运动和能量代谢。因此，g-C3N4@ZnO 的抗菌机制可以归因于物理膜损伤、化学损伤（ROS 增强）和抑制趋化性、生物膜形成和鞭毛运动的组合。
这些发现为光催化剂在植物病害管理中的实际应用提供了新的潜力和见解。© 2023 化学工业协会。
