Preparation of Ti3C2/SrTiO3 composites and their photoelectrochemical cathodic protection

被引：0
|
作者：
Su X. [1 ]
Kong C. [1 ]
Qing D. [1 ]
Zhao Y. [1 ,2 ]
Wang J. [1 ]
机构：
[1] Hebei Province Laboratory of Inorganic Nonmetallic Materials, College of Material Science and Engineering, North China University of Science and Technology, Tangshan
[2] Ceramic Industry Technology Research Institute, Hebei, Tangshan
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 07期
关键词：
composites; metallic conductivity; photoelectrochemical cathodic protection; SrTiO[!sub]3[!/sub; Ti[!sub]3[!/sub]C[!sub]2[!/sub;
D O I：
10.13801/j.cnki.fhclxb.20220909.004
中图分类号：
学科分类号：
摘要：
Due to the shortcomings of strontium titanate (SrTiO3) with large band gap and low separation rate of photogenerating carriers, its photoelectrochemical cathodic protection performance is limited. And in order to solve this problem, SrTiO3 can be modified with the supporting cocatalyst Ti3C2. Firstly, SrTiO3 was prepared by hydrothermal method and Ti3C2 was obtained by etching. Then, Ti3C2/SrTiO3 composites were prepared by mechanical mixing. XRD, XPS, SEM, UV-vis DRS, and PL had characterized the phase structure, chemical state, microscopic morphology, and light absorption performance of the samples. Finally, the photoelectrochemical cathodic protection performance of Ti3C2/SrTiO3 composites to 304 stainless steel (304SS) was analyzed. The results show that Ti3C2/SrTiO3 composites are broadened to absorb visible light. Among them, the photogenerated carrier separation rate of the 15%-Ti3C2/SrTiO3 composite with a mass fraction of 15wt% of Ti3C2 has a higher separation rate and an optical current density of 2.5 µA·cm−2. In the 3.5wt% NaCl solution, after the coupling of 304SS to the composite, its photomotive potential drops by 200 mV under light conditions, which can effectively protect 304SS. After four open and closed light cycle tests, the performance of Ti3C2/SrTiO3 composites are stable. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：3964 / 3972
页数：8
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