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Room temperature Mg reduction of TiO2: formation mechanism and application in photocatalysis
Di Zu1, Zhongfei Xu2, Ao Zhang3
1Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, People's Republic of China. sun.shuqing@sz.tsinghua.edu.cn and State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. huiwu@mail.tsinghua.edu.cn and Department of Physics, Tsinghua University, Beijing, 100084, People's Republic of China.
Abstract:
Defects in metal oxides can significantly improve their physical and chemical properties. However, the conventional methods to generate defects often require complex procedures and harsh conditions. In this study, we design a simple and room-temperature preparation route to prepare defective metal oxide nanoparticles with high yield. The formation of defects is attributed to the generation of oxygen vacancies (VO) and hydrogenation caused by charge transfer at a Mg-metal oxide junction structure. Defective TiO2 exhibits excellent performance toward wastewater cleaning and water splitting. The proposed route is promising in terms of convenience, low cost, and large-scale production.
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