Li Li, Cao Wenjun, Yao Jiahao, Liu Wei, Li Feng, Wang Chunchang
Laboratory of Dielectric Functional Materials, School of Materials Science & Engineering, Anhui University, Hefei 230601, China.
Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China.
Nanomaterials (Basel). 2022 Jan 22;12(3):353. doi: 10.3390/nano12030353.
Piezo-photocatalytic technique is a new-emerging strategy to alleviate photoinduced charge recombination and thus enhance catalytic performance. The heterojunction construction engineering is a powerful approach to improve photocatalytic performance. Herein, the BiOCl/NaNbO with different molar ratios piezoelectric composites were successfully synthesized by hydrothermal methods. The piezo/photodegradation rate (k value) of Rhodamine B (RhB) for BiOCl/NaNbO (BN-3, 0.0192 min) is 2.2 and 5.2 times higher than that of BiOCl (0.0089 min) and NaNbO (0.0037 min), respectively. The enhanced performance of BN-3 composite can be attributed to the heterojunction construction between BiOCl and NaNbO. In addition, the piezo/photodecomposition ratio of RhB for BN-3 (87.4%) is 8.8 and 2.2 times higher than that of piezocatalysis (9.9%) and photocatalysis (40.4%), respectively. We further investigated the mechanism of piezocatalysis, photocatalysis, and their synergy effect of BN-3 composite. This study favors an in-depth understanding of piezo-photocatalysis, providing a new strategy to improve the environmental pollutant remediation efficiency of piezoelectric composites.
压电光催化技术是一种新兴的缓解光生电荷复合从而提高催化性能的策略。异质结构建工程是提高光催化性能的有效方法。在此，通过水热法成功合成了不同摩尔比的BiOCl/NaNbO压电复合材料。BiOCl/NaNbO（BN-3，0.0192 min）对罗丹明B（RhB）的压电/光降解速率（k值）分别比BiOCl（0.0089 min）和NaNbO（0.0037 min）高2.2倍和5.2倍。BN-3复合材料性能的增强可归因于BiOCl和NaNbO之间的异质结构建。此外，BN-3对RhB的压电/光分解率（87.4%）分别比压电催化（9.9%）和光催化（40.4%）高8.8倍和2.2倍。我们进一步研究了BN-3复合材料的压电催化、光催化及其协同效应的机制。该研究有助于深入理解压电光催化，为提高压电复合材料对环境污染物的修复效率提供了新策略。
