Li Han, Ding Yingchun, Luo Kaiyi, Zhang Qiuping, Yuan Huan, Xu Shuyan, Xu Ming
College of Electronic Information & Key Lab of Information Materials of Sichuan Province, Southwest University for Nationalities, Chengdu 610041, China.
Department of Material and Chemical Engineering, Yibin University, Yibin 644000, China.
iScience. 2025 Jan 4;28(2):111750. doi: 10.1016/j.isci.2025.111750. eCollection 2025 Feb 21.
Selectively harnessing photo-induced carriers to control surface photo-redox reactions can enable currently limited specificity in photocatalytic applications. By using a new approach to switching between dominant electron and hole charge transfer on the surfaces of metal oxide nanocrystals, depending on the optimal carrier for specific application functionality in photocatalytic pollutant degradation, H production, CO reduction, and gas sensing. The approach is based on the surface redox properties of custom-designed p-n hetero-structured hybrid nanoparticles (NPs) containing copper oxide, and wide-gap metal oxide semiconductors (MOSs). The customized CuO/ZnO (CXZ) heterostructures ensure effective charge separation and surface reactions driven by UV-vis excited highly reactive holes and show high performance in the photo-oxidative degradation of organic dyes and NO gas sensing. By switching the dominant surface carrier type from holes to electrons, the hybrids exhibit excellent performance in photocatalytic H evolution and CO reduction. This work offers a generic approach to engineering multipurpose photocatalytic materials.
选择性地利用光致载流子来控制表面光氧化还原反应，可以在光催化应用中实现目前有限的特异性。通过一种新方法，在金属氧化物纳米晶体表面的主导电子和空穴电荷转移之间进行切换，这取决于光催化污染物降解、产氢、CO还原和气体传感等特定应用功能的最佳载流子。该方法基于定制设计的含氧化铜的p-n异质结构混合纳米颗粒（NPs）和宽禁带金属氧化物半导体（MOSs）的表面氧化还原特性。定制的CuO/ZnO（CXZ）异质结构确保了由紫外-可见激发的高活性空穴驱动的有效电荷分离和表面反应，并在有机染料的光氧化降解和NO气体传感方面表现出高性能。通过将主导表面载流子类型从空穴切换到电子，这些杂化物在光催化产氢和CO还原方面表现出优异的性能。这项工作为工程化多功能光催化材料提供了一种通用方法。
