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NaNbO3@g-C3N4复合材料的可控构筑及其压电光催化性能

孙术博 于海瀚 李强 葛慎光 姜葱葱 王丹 张丽娜 程新 高超民

孙术博, 于海瀚, 李强, 等. 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(待排刊): 1-8
引用本文: 孙术博, 于海瀚, 李强, 等. 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(待排刊): 1-8
Shubo SUN, Haihan YU, Qiang LI, Shenguang GE, Congcong JIANG, Dan WANG, Lina ZHANG, Xin CHENG, Chaomin GAO. Controlled construction of NaNbO3@g-C3N4 composites and their piezo-photocatalytic properties[J]. Acta Materiae Compositae Sinica.
Citation: Shubo SUN, Haihan YU, Qiang LI, Shenguang GE, Congcong JIANG, Dan WANG, Lina ZHANG, Xin CHENG, Chaomin GAO. Controlled construction of NaNbO3@g-C3N4 composites and their piezo-photocatalytic properties[J]. Acta Materiae Compositae Sinica.

NaNbO3@g-C3N4复合材料的可控构筑及其压电光催化性能

基金项目: 国家自然科学基金项目(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
详细信息
    通讯作者:

    张丽娜,博士,副教授,硕士生导师,研究方向为功能纳米材料可控制备及其光催化应用 E-mail: mse_zhangln@ujn.edu.cn

    高超民,博士,副教授,硕士生导师,研究方向为功能纳米材料可控制备及其光电转换应用 E-mail: chm_gaocm@163.com

  • 中图分类号: O611.4;O643.32,O643.36

Controlled construction of NaNbO3@g-C3N4 composites and their piezo-photocatalytic properties

  • 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以及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。

     

  • 图  1  (a) NaNbO3样品的SEM图;(b) g-C3N4的SEM图;(c-d) NaNbO3@g-C3N4的SEM图

    Figure  1.  (a) SEM image of NaNbO3 sample; (b) SEM image of g-C3N4 and (c, d) SEM image of NaNbO3@g-C3N4

    图  2  NaNbO3、g-C3N4与NaNbO3@g-C3N4的漫反射光谱

    Figure  2.  Diffuse reflection spectra of NaNbO3, g-C3N4 and NaNbO3@g-C3N4

    图  3  g-C3N4与NaNbO3@g-C3N4的的光致发光谱图

    Figure  3.  Photoluminescence spectra of g-C3N4 and NaNbO3@g-C3N4

    图  4  NaNbO3@g-C3N4的高分辨XPS图谱:(a) Nb 3 d, (b) O 1 s, (c) C 1 s和(d) N 1 s

    Figure  4.  High resolution XPS spectra of (a) Nb 3 d, (b) O 1 s, (c) C 1 s and (d) N 1 s of NaNbO3@g-C3N4

    图  5  不同超声功率下NaNbO3的催化性能(a)和对应的产氢速率(b)

    Figure  5.  Catalytic performance (a) of NaNbO3 under different ultrasonic power and corresponding H2 evolution rate (b)

    图  6  NaNbO3@g-C3N4与NaNbO3在纯光条件下(a)和压电光催化条件下(b)的产氢实验;NaNbO3(c)与NaNbO3@g-C3N4(d)分别在纯光与压电光催化条件下的产氢速率图

    Figure  6.  H2 evolution experiments of NaNbO3@g-C3N4 and NaNbO3 under light conditions (a) and piezo-photocatalytic conditions (b); H2 evolution rates of NaNbO3 (c) and NaNbO3@g-C3N4 (d) under light and piezo-photocatalytic conditions, respectively

    图  7  NaNbO3@g-C3N4的稳定性测试结果

    Figure  7.  Stability test results of NaNbO3@g-C3N4

    图  8  NaNbO3@g-C3N4的压电光催化协同作用机制图及其电子-空穴分离示意图

    Figure  8.  Schematic diagram of the piezo-photocatalytic coupling effect mechanism of NaNbO3@g-C3N4 and its electron-hole separation

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出版历程
  • 收稿日期:  2022-02-24
  • 录用日期:  2022-04-04
  • 修回日期:  2022-03-24
  • 网络出版日期:  2022-06-09

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