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N、F共掺杂SrTiO3/C3N4复合光阳极的光电化学阴极保护性能

王建省 孔存辉 曾雄丰 赵英娜

王建省, 孔存辉, 曾雄丰, 等. N、F共掺杂SrTiO3/C3N4复合光阳极的光电化学阴极保护性能[J]. 复合材料学报, 2024, 42(0): 1-7.
引用本文: 王建省, 孔存辉, 曾雄丰, 等. N、F共掺杂SrTiO3/C3N4复合光阳极的光电化学阴极保护性能[J]. 复合材料学报, 2024, 42(0): 1-7.
WANG Jiansheng, KONG Cunhui, ZENG xiongfeng, et al. Photoelectrochemical cathodic protection performance of N, F-codoped SrTiO3/C3N4 composite photoanode[J]. Acta Materiae Compositae Sinica.
Citation: WANG Jiansheng, KONG Cunhui, ZENG xiongfeng, et al. Photoelectrochemical cathodic protection performance of N, F-codoped SrTiO3/C3N4 composite photoanode[J]. Acta Materiae Compositae Sinica.

N、F共掺杂SrTiO3/C3N4复合光阳极的光电化学阴极保护性能

基金项目: 唐山市科技局项目(22130215H);河北省省属高校基本科研业务费项目(JQN2023009)
详细信息
    通讯作者:

    赵英娜,博士,教授,硕士生导师,研究方向为:纳米功能材料、无机非金属材料、光催化材料等 E-mail: zhyn@ncst.edu.cn

  • 中图分类号: TB34;TB333

Photoelectrochemical cathodic protection performance of N, F-codoped SrTiO3/C3N4 composite photoanode

Funds: Tangshan Science and Technology Bureau project: (No. 22130215H); Fundamental Research Fund in colleges and universities of Hebei Province (JQN2023009)
  • 摘要: 为进一步提高SrTiO3的光响应范围并有效抑制其载流子复合的问题,本研究通过溶剂热法合成了N、F共掺杂的SrTiO3 (N、F-SrTiO3),并将N、F-SrTiO3与热缩聚法得到的C3N4混合并煅烧制备出了N、F-SrTiO3/C3N4复合材料,研究了其在模拟海水中对304不锈钢(304 SS)光电化学阴极保护的性能和强化机制。结果表明,光照时,在模拟海水中,N、F-SrTiO3/C3N4与304 SS耦连后的的光电流密度为11 μA/cm2,是SrTiO3光电流密度(2 μA/cm2)的5.5倍;N、F-SrTiO3/C3N4复合材料与304 SS耦联后开路电位为−0.52 V,比304 SS的自腐蚀电位(−0.18 V)负移了340 mV。而304 SS与SrTiO3耦联后开路电位仅负移了220 mV。N、F-SrTiO3/C3N4表现出更好的光电化学阴极保护效果的原因在于N、F共掺杂和C3N4复合两种改性方法协同增强了SrTiO3光吸收,提高电子空穴对的分离率。

     

  • 图  1  SrTiO3、C3N4和N、F-SrTiO3/C3N4复合材料的XRD图谱

    Figure  1.  XRD diffraction patterns of SrTiO3、C3N4, and N、F-SrTiO3/C3N4 composite

    图  2  N、F-SrTiO3/C3N4的SEM图和相应的EDS元素分布图

    Figure  2.  SEM image of N、F-SrTiO3/C3N4 and corresponding EDS mapping

    图  3  SrTiO3、N、F-SrTiO3和N、F-SrTiO3/C3N4复合材料的UV-vis DRS,其中插图为Tauc图

    Figure  3.  UV-vis DRS diagrams of SrTiO3, N、F-SrTiO3, and N、F-SrTiO3/C3N4 composites, inset shows Tauc spectra

    图  4  SrTiO3和N、F-SrTiO3/C3N4复合材料的PL图

    Figure  4.  Fluorescence spectra of SrTiO3, and N、F-SrTiO3/C3N4 composites

    图  5  SrTiO3或N、F-SrTiO3/C3N4复合材料与304 SS耦联后在0 V(versus Ag/AgCl)偏压下的光电流密度-时间曲线

    Figure  5.  Photocurrent density-time curves of SrTiO3 or N、F-SrTiO3/C3N4 composites coupled with 304 SS at 0 V (versus Ag/AgCl) bias

    图  6  SrTiO3和N、F-SrTiO3/C3N4复合材料与304 SS耦联后的开路电位(OCP)-时间曲线

    Figure  6.  Open circuit potential (OCP)l-time curves of SrTiO3 or N、F-SrTiO3/C3N4 composites coupled with 304 SS

    图  7  SrTiO3和N、F-SrTiO3的莫特-肖特基曲线

    Figure  7.  Mott-Schottky curves of SrTiO3, and N、F-SrTiO3

    C−Capacity

    图  8  N、F-SrTiO3/C3N4的光电电化学阴极保护机制图

    Figure  8.  Photoelectrochemical cathodic protection mechanism diagram of N、F-SrTiO3/C3N4

    表  1  SrTiO3基光阳极的光电化学阴极保护性能

    Table  1.   The PCP performance of SrTiO3-based photoanodes

    PhotoanodeMetalaOCP drop /mVReferrence
    Cr-doped SrTiO3 with H2 treatment304 SS~170[4]
    SrTiO3CS270[5]
    SrTiO3/g-C3N4304 SS300[6]
    SrTiO3/TiO2304 SS270[8]
    Ni3S2@TiO2/SrTiO3304 SS644[10]
    SrTiO3304 SS240[17]
    CeO2/SrTiO3304 SS~270[18]
    SrTiO3/TiO2403 SS~500[19]
    BaTiO3/SrTiO3304 SS230[20]
    N、F-SrTiO3/C3N4304 SS340This work
    Notes: a SS represents stainless steel and CS represents carbon steel. OCP means open circuit potential.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-07-22
  • 修回日期:  2024-08-31
  • 录用日期:  2024-09-07
  • 网络出版日期:  2024-09-21

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