Enhanced photocathodic protection performance of Fe2O3/TiO2 heterojunction for carbon steel under simulated solar light

被引：30
|
作者：
Cui, Jun [1 ]
Pei, Yuansheng [1 ]
机构：
[1] Beijing Normal Univ, Key Lab Water & Sediment Sci, Minist Educ, Sch Environm, Beijing 100875, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 779卷
基金：
中国国家自然科学基金;
关键词：
Photocathodic protection; Titanium; Fe2O3; Carbon steel; Electrochemistry; CORROSION BEHAVIOR; PHOTOCATALYTIC DEGRADATION; NANOTUBE ARRAYS; ELECTROCHEMICAL NOISE; ANATASE TIO2; RUTILE TIO2; PHOTOELECTRODE; NANOCOMPOSITE; NANOPARTICLES; INHIBITORS;
D O I：
10.1016/j.jallcom.2018.11.281
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：
Titanium dioxide nano array (TNAs) was successfully modified with Fe2O3 (FTNAs) to enhance the photocathodic protection performance for carbon steel. Fe2O3 as a sensitizer captures large quantities of light photons, resulting in a strong light harvest capability of FTNAs. Meanwhile, the bandgap of FTNAs decreased to 2.26 eV, and the photo-generated current densities were 90 and 400 mu A cm(-2) for TNAs and FTNAs under simulated solar light illumination, respectively. The narrowed bandgap and the sensitive photoelectric response together contribute to a good photocathodic protection performance of FTNAs, which was confirmed by the electrochemical impedance spectroscopy and electrochemical noise. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：183 / 192
页数：10
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