Omr Hossam A E, Wu Yu-Ting, Siao You-Heng, Putikam Raghunath, Chang Chen-Kai, You Zhe-Wu, Lin Ming-Chang, Horn Mark W, Lee Hyeonseok
Department of Photonics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan.
Department of Applied Chemistry, National Yang-Ming Chiao Tung University, Hsinchu 300093, Taiwan.
ACS Appl Mater Interfaces. 2025 Aug 20;17(33):47625-47636. doi: 10.1021/acsami.5c08784. Epub 2025 Aug 5.
Light-driven conversion of CO into small energy-rich molecules effectively addresses both energy demands and reduction in carbon dioxide emissions. However, due to the low efficiency of light absorption and charge carrier separation/transfer, most semiconducting materials have a low conversion activity and poor conversion product selectivity. Herein, ZnInS nanosheets are introduced to oxygen vacancy-rich ZnO microrod films for CO conversion. This heterostructure forms an atomically disordered heterointerface that can play an important role in strengthening the contact between the two crystalline materials and providing an efficient charge transfer pathway. The resulting ZnInS/ZnO film photocatalyst exhibits superior performance compared to other ZnO-film-based photocatalysts (0.84 and 0.34 μmol·cm·h for CH and CO, respectively) with ∼90.8% selectivity toward CH production. The formation of the ZnInS/ZnO heterojunction film contributes to strengthening the charge carrier generation, separation, and migration through a defect-engineered Z-scheme mechanism. This work highlights the role of disorder-engineered heterointerfaces in film-based heterostructured photocatalysts for optimizing the CO conversion efficiency.
光驱动将一氧化碳转化为富含能量的小分子有效地满足了能源需求并减少了二氧化碳排放。然而，由于光吸收以及电荷载流子分离/转移效率较低，大多数半导体材料的转化活性较低且转化产物选择性较差。在此，将硫化锌铟纳米片引入富含氧空位的氧化锌微棒薄膜用于一氧化碳转化。这种异质结构形成了一个原子无序的异质界面，该界面在加强两种晶体材料之间的接触以及提供高效的电荷转移途径方面可发挥重要作用。所得的硫化锌铟/氧化锌薄膜光催化剂与其他基于氧化锌薄膜的光催化剂相比表现出优异的性能（甲烷和一氧化碳的产率分别为0.84和0.34 μmol·cm⁻²·h），对甲烷生成的选择性约为90.8%。硫化锌铟/氧化锌异质结薄膜的形成有助于通过缺陷工程化的Z型机制加强电荷载流子的产生、分离和迁移。这项工作突出了无序工程化异质界面在基于薄膜的异质结构光催化剂中对优化一氧化碳转化效率的作用。
