| NaNbO3@g-C3N4复合材料的可控构筑及其压电光催化性能 |
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| 引用本文： | 孙术博,于海瀚,李强,葛慎光,姜葱葱,王丹,张丽娜,程新,高超民. NaNbO3@g-C3N4复合材料的可控构筑及其压电光催化性能[J]. 复合材料学报, 2023, 40(3): 1534-1540. DOI: 10.13801/j.cnki.fhclxb.20220415.001 |
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| 作者姓名： | 孙术博 于海瀚 李强 葛慎光 姜葱葱 王丹 张丽娜 程新 高超民 |
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| 作者单位： | 1.济南大学 山东省建筑材料制备与测试技术重点实验室，济南 250022 |
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| 基金项目： | 国家自然科学基金(51872121；22104043；51902129)；泰山学者攀登计划项目；济南市“一事一议”顶尖人才项目；济南市“高校20条”项目 (2018 GXRC001)；“111”计划项目—先进水泥基材料创新引智基地(D17001) |
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| 摘 要： | 促进光催化过程中载流子的高效分离一直是困扰科研人员的难题。最近，利用压电效应抑制光生电子-空穴对复合从而提升光催化效率的策略引起了人们的广泛关注。在此，以制备的由g-C3N4包覆的一维NaNbO3纳米棒异质结材料作为研究对象，通过施加超声场引入压电效应，研究其在压电光催化过程中的性能增强机制。通过SEM及XPS等表征手段对材料的微观形貌和键合情况进行了考察。性能实验结果表明:在利用超声波引入压电效应后，NaNbO3@g-C3N4在压电光催化过程中(1.02 mmol·g?1·h?1)表现出比单一的光催化过程(0.49 mmol·g?1·h?1)更高的产氢速率，表明压电效应可极大促进NaNbO3@g-C3N4异质结材料在光催化过程中的载流子分离效率，抑制光生电子与空穴复合，提高其光催化性能。此外，在数据分析的基础上，本文提出了压电-光催化协同作用的机制，为高效压电光催化剂的设计和开发提供了参考。
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| 关 键 词： | NaNbO3@g-C3N4 异质结 压电光催化 载流子分离 协同作用 |
| 收稿时间： | 2022-02-24 |
Controlled construction of NaNbO3@g-C3N4 composites and their piezo-photocatalytic properties |
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| Affiliation: | 1.Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China2.School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China3.China United Cement Pingyi CO., LTD., Linyi 276000, China4.Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, China |
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| Abstract: | Facilitating the efficient separation of carriers in photocatalytic processes has always been a problem for researchers. Recently, the use of piezoelectric effect as an effective strategy to enhance photocatalytic process from inhibitting the recombination of electrons and holes has attracted great interest. Here, we prepared 1D NaNbO3 nanorods coated with g-C3N4 heterojunction materials as the object to investigate the performance enhancement mechanism in the piezo-photocatalytic process by applying an ultrasonic field to introduce the piezoelectric effect. The microscopic morphology and bonding of the materials were investigated through SEM and XPS characterization. The results show that after the introduction of the piezoelectric effect using ultrasonic, NaNbO3@g-C3N4 exhibites a higher H2 evolution rate in the piezo-photocatalytic process (1.02 mmol·g?1·h?1) than in the single photocatalytic process (0.49 mmol·g?1·h?1), indicating that the constructed NaNbO3@g-C3N4 heterojunction materials with the support of piezoelectric effect greatly promote the separation of carriers in the photocatalytic process, inhibite their complexation and improve the photocatalytic performance. In addition, based on the data analysis, the mechanism of piezo-photocatalytic coupling effects is proposed for the design and development of highly efficient piezoelectric photocatalysts. |
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