Yu Xuelian, Xu Jian, Wang Jiangpeng, Qiu Jinyu, An Xiaoqiang, Wang Zhuan, Lv Guocheng, Liao Libing, Ye Jinhua
Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.
Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
Angew Chem Int Ed Engl. 2023 May 2;62(19):e202302050. doi: 10.1002/anie.202302050. Epub 2023 Apr 3.
All-solid-state Z-Scheme photocatalysts have attracted significant attention due to their great potential for solar fuel production. However, delicately coupling two individual semiconductors with a charge shuttle by a material strategy remains a challenge. Herein, we demonstrate a new protocol of natural Z-Scheme heterostructures by strategically engineering the component and interfacial structure of red mud bauxite waste. Advanced characterizations elucidated that the hydrogen-induced formation of metallic Fe enabled the effective Z-Scheme electron transfer from γ-Fe O to TiO , leading to the significantly boosted spatial separation of photo-generated carriers for overall water splitting. To the best of our knowledge, it is the first Z-Scheme heterojunction based on natural minerals for solar fuel production. Thus our work provides a new avenue toward the utilization of natural minerals for advanced catalysis applications.
全固态Z型光催化剂因其在太阳能燃料生产方面的巨大潜力而备受关注。然而，通过材料策略将两种单独的半导体与电荷穿梭体精细耦合仍然是一个挑战。在此，我们通过对赤泥铝土矿废料的成分和界面结构进行策略性工程设计，展示了一种新型天然Z型异质结构的制备方法。先进的表征表明，氢诱导形成的金属铁实现了从γ-Fe₂O₃到TiO₂的有效Z型电子转移，从而显著促进了光生载流子的空间分离以实现整体水分解。据我们所知，这是首个基于天然矿物用于太阳能燃料生产的Z型异质结。因此，我们的工作为利用天然矿物进行先进催化应用提供了一条新途径。
