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Synergetic effect of graphene and Co(OH)_2 as cocatalysts of TiO_2 nanotubes for enhanced photogenerated cathodic protection

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Lu Xiayu 1,2   Liu Li 1,3 *   Xie Xuan 1,3   Cui Yu 1   Oguzie Emeka E 3,4   Wang Fuhui 1,3  
文摘 Alayer of graphene (GR) particles was successfully deposited at the interface between Co(OH)_2 nanoparticles and TiO_2 nanotubes, aiming to improve the photoelectrochemical performance of the large-bandgap semiconductor TiO_2. The obtained Co(OH)_2/GR/TiO_2 was extensively characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis absorption spectra and photoluminescence (PL) emission spectra. Electrochemical impedance spectra, photogenerated potential-time (E-t), photocurrent density-time (i-t) and i-E curves and open circuit potential (OCP) curves were measured to investigate the photoelectrochemical activities and photogenerated cathodic protection properties. The results revealed that Co(OH)2/GR/TiO_2 exhibits excellent photoelectrochemical and photogenerated cathodic performance due to synergistic effect between Co(OH)2 and graphene. Co(OH)2 and graphene co-modified TiO_2 photoanode could provide an effective protection for 304 stainless steel (304SS) in 3.5 wt% NaCl solution for 12 h, which would be promising for future practical applications in the field of marine corrosion protection.
来源 Journal of Materials Science & Technology ,2020,37:55-63 【核心库】
DOI 10.1016/j.jmst.2019.07.034
关键词 TiO_2 nanotubes ; Graphene ; Co(OH)_2 nanoparticles ; Photoelectrochemical performance ; Photogenerated cathodic protection
地址

1. Institute of Metal Research,Chinese Academy of Sciences, Shenyang National Laboratory for Materials Science, Shenyang, 110016  

2. School of Materials Science and Engineering,University of Science and Technology of China, Shenyang, 110016  

3. School of Materials Science and Engineering,Northeastern University, Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Shenyang, 110819  

4. Electrochemistry and Materials Science Research Laboratory,Department of Chemistry,Federal University of Technology, Nigeria, Owerri, 1526

语种 英文
文献类型 研究性论文
ISSN 1005-0302
学科 一般工业技术;金属学与金属工艺
基金 supported financially by the National Natural Science Foundation of China ;  the Fundamental Research Funds for the Central Universities
文献收藏号 CSCD:6664484

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引证文献 4

1 Wang Xiutong Research progress of TiO_2 photocathodic protection to metals in marine environment Journal of Oceanology and Limnology,2020,38(4):1018-1044
被引 1

2 张雪菲 金属光电化学阴极保护材料及其防腐功能化实现研究进展 表面技术,2021,50(3):128-140
被引 1

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