二维Ti3C2修饰WO3/SrTiO3异质结复合材料及其光电化学阴极保护性能

苏新悦; 王建省; 赵英娜; 庆达; 曾雄丰

doi:10.13801/j.cnki.fhclxb.20230705.001

二维Ti₃C₂修饰WO₃/SrTiO₃异质结复合材料及其光电化学阴极保护性能

doi: 10.13801/j.cnki.fhclxb.20230705.001

苏新悦¹,
王建省¹,
赵英娜^{1, 2, ,},
庆达¹,
曾雄丰¹

1.
华北理工大学　材料科学与工程学院，河北省无机非金属材料实验室，唐山 063210
2.
河北省(唐山)陶瓷产业技术研究院，唐山 063007

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

中图分类号: TB34；TB331
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- 被引次数: 0
出版历程
- 收稿日期: 2023-05-10
- 修回日期: 2023-06-07
- 录用日期: 2023-06-27
- 网络出版日期: 2023-07-05
- 刊出日期: 2024-03-01

Photoelectrochemical cathodic protection performance of two-dimensional Ti₃C₂-modified WO₃/SrTiO₃ heterojunction composites

1.
Hebei Province Laboratory of Inorganic Nonmetallic Materials, College of Material Science and Engineering, North China University of Science and Technology, Tangshan 063210, China
2.
Hebei (Tangshan) Ceramic Industry Technology Research Institute, Tangshan 063007, China

Funds: Natural Science Foundation—Steel and Iron Foundation of Hebei Province (E2021209002); Tangshan Science and Technology Bureau Project (21130211D; 22130215H)

摘要

摘要: 引入第二相材料构建异质结及加入助催化剂都可以有效提高半导体材料的光电化学性能。本文设计制备了WO₃/SrTiO₃异质结复合材料并选用助催化剂Ti₃C₂进行修饰，在模拟太阳光环境下通过光电化学阴极保护技术保护304不锈钢(304 SS)。结果表明：Ti₃C₂-WO₃/SrTiO₃复合材料的光电化学阴极保护性能显著增强。将304 SS与Ti₃C₂-WO₃/SrTiO₃复合材料耦合，可将304 SS的电位从−0.13 V转移到−0.42 V，并且三元复合材料产生的光电流密度是单独使用SrTiO₃的7倍。在WO₃/SrTiO₃界面上形成的异质结电场及助催化剂Ti₃C₂的加入协同提高了光生电子和空穴的分离效率，提高了光电化学阴极保护性能。
- 异质结 /
- 助催化剂 /
- Ti₃C₂-WO₃/SrTiO₃ /
- 复合材料 /
- 光电化学阴极保护
Abstract: The introduction of second-phase materials to construct heterojunctions and the addition of co-catalysts can effectively improve the photoelectrochemical performance of semiconductor materials. In this study, Ti₃C₂-WO₃/SrTiO₃ composites were designed and prepared to protect 304 stainless steel (304 SS) by photochemical cathodic protection technology in simulated sunlight environment. The results show that the photoelectrochemical cathodic protection performance of Ti₃C₂-WO₃/SrTiO₃ composites is significantly enhanced. Coupling 304 SS with Ti₃C₂-WO₃/SrTiO₃ composites transfers the potential of 304 SS from −0.13 V to −0.42 V, and the ternary composites produce a photocurrent density 7 times higher than SrTiO₃ alone. The heterojunction electric field formed at the WO₃/SrTiO₃ interface and the addition of co-catalyst Ti₃C₂ synergistically improve the separation efficiency of photogenerated electrons and holes, and improve the photoelectrochemical cathodic protection performance.
- heterojunctions /
- co-catalyst /
- Ti₃C₂-WO₃/SrTiO₃ /
- composites /
- photoelectrochemical cathodic protection

HTML全文

图 1 Ti₃C₂-WO₃/SrTiO₃复合材料制备流程图

Figure 1. Flowchart of preparation of Ti₃C₂-WO₃/SrTiO₃ composites

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图 2 SrTiO₃、WO₃/SrTiO₃和Ti₃C₂-WO₃/SrTiO₃复合材料的XRD图谱(a)、XPS全谱图(b)、Sr3d图谱(c)、Ti2p图谱(d)和W4f图谱(e)

Figure 2. XRD patterns (a), XPS full spectrum (b), Sr3d spectra (c), Ti2p spectra (d) and W4f spectra (e) of SrTiO₃, WO₃/SrTiO₃ and Ti₃C₂-WO₃/SrTiO₃ composites

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图 3 SrTiO₃ (a)、WO₃/SrTiO₃ (b)、Ti₃C₂-WO₃/SrTiO₃复合材料(c)的SEM图像和Ti₃C₂-WO₃/SrTiO₃复合材料的EDS元素分布图(d)

Figure 3. SEM images of SrTiO₃ (a), WO₃/SrTiO₃ (b), Ti₃C₂-WO₃/SrTiO₃ composites (c) and EDS mapping of Ti₃C₂-WO₃/SrTiO₃ composites (d)

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图 4 SrTiO₃、WO₃/SrTiO₃和Ti₃C₂-WO₃/SrTiO₃复合材料的UV-vis DRS 图谱(a)和光致发光(PL)图谱(b)

Figure 4. UV-vis DRS diagram (a) and photoluminescent (PL) spectra (b) of SrTiO₃, WO₃/SrTiO₃ and Ti₃C₂-WO₃/SrTiO₃ composites

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图 5 SrTiO₃、WO₃/SrTiO₃和Ti₃C₂-WO₃/SrTiO₃复合材料的Nyquist图

Figure 5. Nyquist spectra of SrTiO₃, WO₃/SrTiO₃ and Ti₃C₂-WO₃/SrTiO₃ composites

R_s—Electrolyte solution resistance; Q—Electrochemical capacitance; R₁—Semiconductor depletion layer resistance; R₂—Charge transfer resistance

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图 6 SrTiO₃、WO₃/SrTiO₃和Ti₃C₂-WO₃/SrTiO₃复合材料的光电流密度-时间曲线(a)和开路电位-时间曲线(b)；(c) 光电化学阴极保护测试装置图；(d) 光电化学阴极保护机制图

Figure 6. Photocurrent density-time curves (a) and open-circuit potential-time curves (b) of SrTiO₃, WO₃/SrTiO₃ and Ti₃C₂-WO₃/SrTiO₃ composites; (c) Test device diagram for photoelectrochemical cathodic protection; (d) Diagram of the photoelectrochemical cathodic protection mechanism

304 SS—304 stainless steel; E₃₀₄_SS—Self-corrosion potential of 304 SS; GW— Ground; CE—Counter electrode; RE—Reference electrode; WE—Working electrode; SCE—Saturated calomel electrode; VB—Valence band; CB—Conduction band; NHE—Normal hydrogen electrode; hv—Photon energy

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