Sun Yanhua, Li Xiaoning, Vijayakumar Amruthalakshmi, Liu Huan, Wang Caiyun, Zhang Shujun, Fu Zhengping, Lu Yalin, Cheng Zhenxiang
Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, North Wollongong, New South Wales 2500, Australia.
ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, North Wollongong, New South Wales 2500, Australia.
ACS Appl Mater Interfaces. 2021 Mar 10;13(9):11050-11057. doi: 10.1021/acsami.1c01407. Epub 2021 Feb 26.
Piezoelectric materials have recently demonstrated their potential applications in clean energy exploration and environmental remediation through triggering a number of catalytic reactions by harvesting waste vibrational energy in the environment. In this work, unique lead-free 0.7BiFeO-0.3BaTiO (BF-BT) nanoparticles with tuned band structure were synthesized by the hydrothermal method for use as piezoelectric catalysts to generate hydrogen by splitting water; a high production rate of 1.322 mmol/g was achieved in 1 h, which is 10 times higher than the production rate of pure BiFeO. Of particular interest, BF-BT particles attached to nickel mesh have the ability to degrade rhodamine B in flowing water, demonstrating their potential to treat polluted water by anchoring BF-BT in drains. Finally, we propose novel insight on the piezocatalytic mechanism, which is based on the internal electric field (the sum of the depolarization field and the screening charge field) that drives electron/hole separation and movement.
压电材料最近通过收集环境中的废振动能引发一系列催化反应，在清洁能源探索和环境修复方面展示了其潜在应用。在这项工作中，通过水热法合成了具有独特能带结构的无铅0.7BiFeO-0.3BaTiO（BF-BT）纳米颗粒，用作压电催化剂通过分解水来制氢；在1小时内实现了1.322 mmol/g的高产率，这比纯BiFeO的产率高10倍。特别值得注意的是，附着在镍网上的BF-BT颗粒有能力在流动水中降解罗丹明B，这表明通过将BF-BT固定在排水管道中来处理污染水的潜力。最后，我们基于驱动电子/空穴分离和移动的内电场（退极化场和屏蔽电荷场之和）提出了关于压电催化机制的新见解。
