Carbon quantum dots/Ag sensitized TiO2 nanotube film for applications in photocathodic protection

被引：34
作者：
Guan, Zi-Chao [1 ]
Jin, Piao [1 ]
Liu, Qing [1 ]
Wang, Xia [1 ]
Chen, Li-Fang [1 ]
Xu, Hui [1 ]
Song, Guang-Ling [2 ]
Du, Rong-Gui [1 ]
机构：
[1] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Fujian, Peoples R China
[2] Xiamen Univ, Coll Mat, Ctr Marine Mat Corros & Protect, Xiamen 361005, Fujian, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 797卷
基金：
中国国家自然科学基金;
关键词：
TiO2; nanotubes; Pulse electrodeposition; Ag nanoparticles; Carbon quantum dots; Photocathodic protection; LIGHT PHOTOCATALYTIC ACTIVITY; AG NANOPARTICLES; FACILE SYNTHESIS; ARRAYS; FABRICATION; COMPOSITES; ENHANCEMENT; WATER; UV; NANOCOMPOSITE;
D O I：
10.1016/j.jallcom.2019.05.199
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In order to obtain a TiO2 composite film with improved photoelectrochemical properties, a TiO2 nanotube array (NTA) film was constructed on a Ti substrate via anodization, then Ag nanoparticles (NPs) and carbon quantum dots (CQDs) were successively deposited on the TiO2 NTA film by pulse current deposition and hydrothermal treatment, respectively. After the sensitization by CQDs and Ag NPs, the light absorption of the TiO2 composite film was extended to the visible region. Under white light irradiation, the photocurrent density of the composite film in a 0.5M Na2SO4 solution reached 110 mu A cm(-2), much higher than that (60 mu A cm(-2)) of the single TiO2 film. The CQDs/Ag/TiO2 composite film as a photoanode showed an improved photocathodic protection effect, which made the potential of the coupled 403 stainless steel (403SS) in the 0.5 M NaCl solution drop by 400 mV relative to its corrosion potential. (C) 2019 Elsevier B.V. All rights reserved.
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页码：912 / 921
页数：10
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