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

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 9 篇

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

2 Opra D P Vanadium-doped TiO_2-B/anatase mesoporous nanotubes with improved rate and cycle performance for rechargeable lithium and sodium batteries Journal of Materials Science & Technology,2020,54:181-189
CSCD被引 4 次

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