College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
ACS Appl Mater Interfaces. 2024 Apr 10;16(14):17432-17441. doi: 10.1021/acsami.3c18143. Epub 2024 Mar 27.
Z-scheme heterostructure-based photocatalysts consist of a reduction photocatalyst and an oxidation photocatalyst, enabling them to possess a high capacity for both reduction and oxidation. However, the coupling reaction between photocatalytic H generation through water reduction and sterilization using Z-scheme systems has been rarely reported. Herein, 1D WO nanowires embedded over 2D g-CN nanosheets are well-constructed as an integrated Z-scheme heterojunction. Experimental results and density functional theory calculations not only demonstrate the achievement of efficient interfacial charge separation and transport, leading to prolonged lifetime of photogenerated charge carriers, but also directly confirm the mechanism of Z-scheme charge transfer. As expected, the optimized WO/g-CN nanostructure exhibits superior photocatalytic sterilization activity against as well as excellent H generation performance under visible-light irradiation (λ ≥ 420 nm). Due to its nontoxic nature, WO/g-CN holds great potential in eradicating bacterial infections in living organisms.
基于 Z 型异质结构的光催化剂由还原光催化剂和氧化光催化剂组成，使其具有较强的还原和氧化能力。然而，通过水还原产生光催化 H2 与 Z 型系统杀菌的偶联反应很少有报道。在此，通过一维 WO 纳米线嵌入二维 g-C3N4 纳米片中构建了一种集成的 Z 型异质结。实验结果和密度泛函理论计算不仅证明了高效的界面电荷分离和传输的实现，导致光生载流子的寿命延长，而且直接证实了 Z 型电荷转移的机制。不出所料，优化后的 WO/g-C3N4 纳米结构在可见光（λ≥420nm）照射下表现出优异的杀菌活性和出色的 H2 生成性能。由于其无毒特性，WO/g-C3N4 在消除生物体中的细菌感染方面具有很大的潜力。
