Fe2O3/TiO2纳米复合材料对304不锈钢的光生阴极保护性能

doi:10.11902/1005.4537.2017.210

中国腐蚀与防护学报

2019, Vol. 39

Issue (1): 36-42 DOI: 10.11902/1005.4537.2017.210

研究报告

本期目录 | 过刊浏览

Fe₂O₃/TiO₂纳米复合材料对304不锈钢的光生阴极保护性能

廖彤^1,^2,³,马峥^1,³,李蕾蕾^1,³,马秀敏^1,³,王秀通^1,³,侯保荣^1,³(

)

1. 中国科学院海洋研究所青岛 266071
2. 中国科学院大学北京 100049
3. 青岛海洋科学与技术试点国家实验室海洋腐蚀与防护开放工作室青岛 266237

Light-generated Cathodic Protection Properties of Fe₂O₃/TiO₂ Nanocomposites for 304 Stainless Steel

Tong LIAO^1,^2,³,Zheng MA^1,³,Leilei LI^1,³,Xiumin MA^1,³,Xiutong WANG^1,³,Baorong HOU^1,³(

)

1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Open Studio for Marine Corrosion and Protection, Qingdao Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China

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摘要:

采用化学浴法在阳极氧化的TiO₂纳米管表面沉积Fe₂O₃，制备Fe₂O₃/TiO₂纳米复合材料。通过扫描电子显微镜 (SEM)，X射线衍射 (XRD)，X射线光电子能谱 (XPS)，紫外-可见漫反射吸收光谱 (UV-vis DRS) 等手段对材料的形貌、晶相、成分、光响应性等进行表征。通过测试可见光下开/闭光时的开路电位 (OCP)、光致激发电流 (i-t)、电化学阻抗谱 (EIS) 等研究复合材料的光电性能。结果表明，Fe₂O₃纳米颗粒的修饰能增加TiO₂纳米管对可见光的利用效率，增强阴极保护性能。0.05 mol/L Fe(NO₃)₃制备的Fe₂O₃/TiO₂纳米复合材料在可见光下，耦联304不锈钢后光生电位达-740 mV，比纯TiO₂纳米管低约300 mV，对304不锈钢起到更好的阴极保护效果。

关键词 ：光生阴极保护, Fe₂O₃/TiO₂纳米复合材料, 304不锈钢

Abstract：

Fe₂O₃/TiO₂ nanocomposites were fabricated by chemical bath deposition on the surface of the TiO₂ nanotubes, which had been prepared on titanium foil via anodic oxidation method. Their morphology, phase constituent, composition, and light response were characterized by scanning electron microscopy (SEM), X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS) and ultraviolet-visible diffuse reflection spectrum (UV-vis DRS). Photoelectric properties of the nanocomposites were assessed by measuring open circuit potential (OCP) under intermittent illumination and photocurrent density versus time (i-t), as well as electrochemical impedance spectroscopy (EIS). Results indicate that the incorporation of Fe₂O₃ increases the utilization efficiency of visible light and strengthens the cathodic protection performance of the TiO₂ nanotubes. In visible light, the open circuit potential of Fe₂O₃/TiO₂ nanocomposite prepared in the bath of 0.05 mol/L Fe(NO₃)₃ is -740 mV, about 300 mV lower than that of the ordinary TiO₂ nanotubes, a better cathodic protection effect for 304 stainless steel.

Key words： photocathode protection Fe₂O₃/TiO₂ nanocomposite 304 stainless steel

收稿日期: 2017-12-13

ZTFLH:

TG174

基金资助:国家重点基础研究发展计划((2014CB643304));中国科学院战略性先导科技专项 (A类)((XDA13040401));中国工程院重点项目(2017-XZ-16)

通讯作者: 侯保荣 E-mail: baoronghou@163.com

Corresponding author: Baorong HOU E-mail: baoronghou@163.com

作者简介: 廖彤，女，1991年生，硕士生

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引用本文:

廖彤,马峥,李蕾蕾,马秀敏,王秀通,侯保荣. Fe₂O₃/TiO₂纳米复合材料对304不锈钢的光生阴极保护性能[J]. 中国腐蚀与防护学报, 2019, 39(1): 36-42.
Tong LIAO, Zheng MA, Leilei LI, Xiumin MA, Xiutong WANG, Baorong HOU. Light-generated Cathodic Protection Properties of Fe₂O₃/TiO₂ Nanocomposites for 304 Stainless Steel. Journal of Chinese Society for Corrosion and protection, 2019, 39(1): 36-42.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2017.210 或 https://www.jcscp.org/CN/Y2019/V39/I1/36

图1 电化学测试装置示意图

图2 纯TiO2纳米管和Fe2O3/TiO2纳米复合材料的SEM像及复合材料Fe2O3/TiO2 (C) 的EDS分析结果

图3 Fe2O3/TiO2纳米复合材料的XRD谱

图4 Fe2O3/TiO2 (C) 复合材料的XPS谱

图5 Fe2O3/TiO2复合材料紫外-可见漫反射吸收光谱

图6 304不锈钢耦合复合光阳极在开闭光条件下的开路电位变化

图7 复合光阳极在开闭光条件下的光电流密度-时间曲线

图8 Fe2O3/TiO2光阳极电化学阻抗谱图，高频区放大图及等效拟合电路

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