Piezoelectric Effect-Mediating Reactive Oxygen Species in NiTiO 3 Nanorods for Photocatalytic Removal of U(VI)

作者：Junjie Chen, Yaoxuan Wang, Dongling Zeng, Zifan Li, Haonan Pei, Xiaohong Cao, Youqun Wang, Zhimin Dong, Zhibin Zhang, Yunhai Liu · 发表于：Inorganic Chemistry · 年份：2024 · DOI：10.1021/acs.inorgchem.4c02096 · 被引用次数：16 · 研究领域：Radioactive element chemistry and processing、Gas Sensing Nanomaterials and Sensors、Advanced Photocatalysis Techniques

Piezoelectric catalysis could convert mechanical energy into chemical energy, which can combine with solar energy for a high-efficiency piezo-photocatalysis reaction. In this work, NiTiO 3 nanorods were synthesized via the sol–gel method and initially employed for the removal of U(VI) from radioactive-contaminated water. The NiTiO 3 nanorods will generate an internal electric field in an ultrasonic environment, which could greatly improve the performance of piezo-photocatalysis in reducing U(VI) by promoting the generation of photoexcited electrons and reactive oxygen species (ROS). After exposure to visible light and ultrasound for 3 h, the NTO-R-1 exhibited superb U(VI) degradation efficiency of 93.91%, which was 2.58, 6.15, and 6.68 times greater than those of visible light, ultrasonic irradiation, and dark, respectively. Moreover, photoexcited electrons and oxygen-active species play a decisive role in the piezo-photocatalysis process. Therefore, NiTiO 3 with excellent piezo-photocatalysis properties exhibits good potential for the development of efficient wastewater purification catalysts and also helps to probe the possible mechanism of piezo-photocatalysis removal of U(VI) in wastewater.