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BaTiO3/SrTiO3复合薄膜的制备及其光电化学阴极保护性能

庆达 王建省 苏新悦 赵英娜 曾雄丰

庆达, 王建省, 苏新悦, 等. BaTiO3/SrTiO3复合薄膜的制备及其光电化学阴极保护性能[J]. 复合材料学报, 2024, 41(4): 1945-1953. doi: 10.13801/j.cnki.fhclxb.20230817.003
引用本文: 庆达, 王建省, 苏新悦, 等. BaTiO3/SrTiO3复合薄膜的制备及其光电化学阴极保护性能[J]. 复合材料学报, 2024, 41(4): 1945-1953. doi: 10.13801/j.cnki.fhclxb.20230817.003
QING Da, WANG Jiansheng, SU Xinyue, et al. Preparation of BaTiO3/SrTiO3 composite film and its photoelectrochemical cathodic protection performance[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 1945-1953. doi: 10.13801/j.cnki.fhclxb.20230817.003
Citation: QING Da, WANG Jiansheng, SU Xinyue, et al. Preparation of BaTiO3/SrTiO3 composite film and its photoelectrochemical cathodic protection performance[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 1945-1953. doi: 10.13801/j.cnki.fhclxb.20230817.003

BaTiO3/SrTiO3复合薄膜的制备及其光电化学阴极保护性能

doi: 10.13801/j.cnki.fhclxb.20230817.003
基金项目: 河北省自然科学基金钢铁联合基金(E2021209002);唐山市科技局项目(21130211D;22130215H)
详细信息
    通讯作者:

    王建省,博士,副教授,研究方向为光催化、光电催化、光电化学腐蚀防护 E-mail: wangjiansheng@ncst.edu.cn

  • 中图分类号: O643;TB332

Preparation of BaTiO3/SrTiO3 composite film and its photoelectrochemical cathodic protection performance

Funds: Natural Science Foundation—Steel and Iron Foundation of Hebei Province (E2021209002); Tangshan Science and Technology Bureau Project (21130211D; 22130215H)
  • 摘要: 提高光生载流子的分离效率是提高光电化学阴极保护性能的有效途径,为弥补SrTiO3禁带宽度大、光生载流子分离效率低等缺点,通过两步超声喷雾热解工艺在氟掺杂氧化锡导电玻璃(FTO)上制备了BaTiO3/SrTiO3复合薄膜。通过XRD、SEM、UV-vis DRS、PL对样品物相成分、表面形貌、光学性能等进行观测。随后以304不锈钢(304 SS)为被保护金属,观测了BaTiO3/SrTiO3复合薄膜遮蔽光条件下的光电化学阴极保护性能。其中BaTiO3/SrTiO3的相对位置由Mott-Schottky曲线确定。结果表明:通过两步超声喷雾热解工艺制备得到的 BaTiO3/SrTiO3复合薄膜,光吸收范围拓宽至400 nm;BaTiO3/SrTiO3 复合薄膜相比于SrTiO3薄膜,光吸收性能增强;光生载流子分离效率提高;在3.5wt%NaCl 溶液中,BaTiO3/SrTiO3 复合薄膜使304 SS的开路电位负移至−0.38 V,负移程度约230 mV,而纯SrTiO3薄膜仅能负移100 mV。其性能提升主要归因于BaTiO3与SrTiO3 复合形成了异质结,促进了光生载流子的分离。

     

  • 图  1  BaTiO3/SrTiO3复合薄膜制备流程图

    Figure  1.  Flowchart of preparation of BaTiO3/SrTiO3 composite film

    图  2  光电化学阴极保护测试装置图

    Figure  2.  Test device diagram for photoelectrochemical cathodic protection

    GW—Ground wire; CE—Counter electrode; RE—Reference electrode; WE—Working electrode; CHI660E—Electrochemical workstation; AM 1.5G—Air mass 1.5 global, 100 W/cm2; —Photon energy

    图  3  SrTiO3、BaTiO3和BaTiO3/SrTiO3复合薄膜的XRD图谱

    Figure  3.  XRD patterns of SrTiO3, BaTiO3 and BaTiO3/SrTiO3 composite film

    FTO—Fluorine-doped tin oxide conductive glass

    图  4  SrTiO3、BaTiO3和BaTiO3/SrTiO3复合薄膜表面((a)~(c))与截面((d)~(f))的微观形貌

    Figure  4.  Microstructure of surface ((a)-(c)) and cross section ((d)-(f)) of SrTiO3, BaTiO3 and BaTiO3/SrTiO3 composite films

    图  5  SrTiO3、BaTiO3和BaTiO3/SrTiO3复合薄膜的UV-vis DRS图(a)及Tauc图(b)

    Figure  5.  UV-vis DRS diagram (a) and Tauc diagram (b) of SrTiO3, BaTiO3 and BaTiO3/SrTiO3 composite film

    α—Absorption coefficient

    图  6  SrTiO3、BaTiO3和BaTiO3/SrTiO3复合薄膜的光致发光光谱图

    Figure  6.  Photoluminescent spectrum of SrTiO3, BaTiO3 and BaTiO3/SrTiO3 composite film

    图  7  SrTiO3、BaTiO3和BaTiO3/SrTiO3复合薄膜的电化学阻抗谱图

    Figure  7.  Electrochemical impedance spectra of SrTiO3, BaTiO3 and BaTiO3/SrTiO3 composite film

    Z'—Real part of impedance ; Z''—Imaginary part of impedance; Q1, Q2—Electrochemical capacitor; Rs—Electrolyte resistance; R1—Depletion layer resistance; R2—Charge-transfer resistance

    图  8  SrTiO3、BaTiO3和BaTiO3/SrTiO3复合薄膜的光电流密度-时间曲线

    Figure  8.  Photocurrent density-time curves of SrTiO3, BaTiO3 and BaTiO3/SrTiO3 composite film

    图  9  SrTiO3、BaTiO3和BaTiO3/SrTiO3复合薄膜的 开路电位(OCP)-时间曲线

    Figure  9.  Open-circuit potential (OCP)-time curves of SrTiO3, BaTiO3 and BaTiO3/SrTiO3 composite film

    E304 SS—Potential of 304 stainless steel

    图  10  SrTiO3、BaTiO3和BaTiO3/SrTiO3复合薄膜的塔菲尔极化曲线

    Figure  10.  Tafel polarization curves of SrTiO3, BaTiO3 and BaTiO3/SrTiO3 composite film

    图  11  SrTiO3、BaTiO3的莫特-肖特基曲线

    Figure  11.  Mott-Schottky curves of SrTiO3 and BaTiO3 film

    C—Capacitance density

    图  12  BaTiO3/SrTiO3复合薄膜光电化学阴极保护机制

    Figure  12.  Photoelectrochemical cathodic protection mechanism of BaTiO3/SrTiO3 composite film

    NHE—Normal hydrogen electrode

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  • 收稿日期:  2023-05-30
  • 修回日期:  2023-07-28
  • 录用日期:  2023-08-03
  • 网络出版日期:  2023-08-18
  • 刊出日期:  2024-04-15

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