期刊
JOURNAL OF ADVANCED CERAMICS
卷 11, 期 10, 页码 1641-1653出版社
SPRINGER
DOI: 10.1007/s40145-022-0637-8
关键词
piezoelectric effect; photocatalysis; visible light; decomposition
资金
- National Natural Science Foundation of China [51562029, 21762031]
- Program for Grassland Elite of Inner Mongolia Autonomous Region [CYYC10032]
- Program for Innovative Research Team in Universities of Inner Mongolia Autonomous Region [NMGIRT2214]
This study achieves dual catalytic effect of light and vibration by introducing piezoelectric materials. The mixture of AgNbO3 and LiTaO3 decomposes nearly 96% of Rhodamine B under dual excitation, demonstrating the significant decomposition performance of the catalyst.
Simultaneously employing light and vibration energy by piezoelectric material to realize environmental remediation is an advanced oxidation method. Silver niobate (AgNbO3) is a visible light driven photocatalyst for the removal of organic pollutants. However, the high recombination rate of photo-generated electrons and holes suppresses its photocatalytic activity. Piezoelectric potential excited by vibration can facilitate the separation of light induced charges. Unfortunately, AgNbO3 is an antiferroelectric. In this work, distinct photo-/vibration-bi-catalysis has been achieved in ferroelectric (1-x)AgNbO3-xLiTaO(3) solid solution. The results show that similar to 96% Rhodamine B (RhB) can be decomposed under the bi-excitation of ultrasound and visible light within 120 min with 0.95AgNbO(3)-0.05LiTaO(3) catalyst. The synergy effect from efficient visible light excitation and enhanced separation of the photo-induced charges from the electric field by the mechanical strain results in the distinct decomposition performance of catalysts.
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