期刊
NANO ENERGY
卷 77, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2020.105305
关键词
Coupled photo-piezo-catalytic effect; Photocatalysis; Piezo-catalysis; Piezoelectric effect
类别
资金
- National Key R&D Program of China [2016YFA0202701, 2018YFB2200500]
- National Natural Science Foundation of China [51472055, 61974170, 61604012, 61404034]
- External Cooperation Program of BIC, Chinese Academy of Sciences [121411KYS820150028]
- 2015 Annual Beijing Talents Fund [2015000021223ZK32]
- Qingdao National Laboratory for Marine Science and Technology [2017ASKJ01]
- University of Chinese Academy of Sciences [Y8540XX2D2]
Over the last decade, ferro-/piezo-electric materials have provided new directions to improve catalysis. However, current challenges that must be solved include secondary pollution by the piezoelectric particulates and a limited potential for reuse and recyclability. Here, we report an efficient approach of using a piezoceramic-polymer porous foam to package barium strontium titanate (BST) particulates and prevent secondary pollution, while being able to maintain a high photo-piezo-catalytic performance after 10 cycles of repeated catalytic reactions. The photo-piezo-catalysis achieves a 97.8% dye degradation and an enhanced performance of 275% when compared to individual photocatalysis by light irradiation or periodic low-frequency mechanical squeezing alone. It is suggested the photo-piezo-catalytic coupling effect combines the advantages of increased generated electron-hole pairs and the induced piezoelectric electric field leads to a higher degree of electron-hole separation. The BST-PDMS porous foam for photo-piezo-catalysis offers a potential approach in wastewater degradation via utilizing both solar energy and environmental mechanical sources.
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