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| 氢化TiO2纳米棒的制备及其对Q235碳钢的光生阴极保护特性 |
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冯敏1,2, 刘盈2, 张赛楠2, 卫宁1, 吉利1, 王道爱1
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1.中科院兰州化学物理研究所 固体润滑国家重点实验室, 兰州 730000;2.中国海洋大学 材料科学与工程学院, 青岛 266100
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| 摘要: |
| 随着海洋开发的逐步推进，海洋工程中的金属防腐蚀问题显得愈加重要。目前，可利用半导体的光电效应实现对金属的光生阴极保护，为改善常用的TiO2光电极材料的弱光吸收和低转换效率问题，文中利用水热法在FTO导电玻璃表面构建一维有序TiO2纳米棒阵列，并通过氢化处理提高TiO2对太阳光的吸收和光电流密度。考察了氢化TiO2纳米棒阵列在海水环境下对Q235碳钢的光生阴极保护特性，结果表明氢化TiO2纳米棒的光电流密度达到了2.12 mA/cm2，且稳定性良好；当Q235碳钢耦连于模拟太阳光照下的氢化TiO2纳米棒电极时，其界面反应电阻变小，电极电位较原先的腐蚀电位降低约349 mV，说明氢化TiO2纳米棒阵列能够对碳钢产生良好的光生阴极保护效应，且该效应在无光条件下能保持至少7 h。 |
| 关键词: TiO2纳米棒 氢化处理 Q235碳钢 光生阴极保护 腐蚀 |
| DOI：10.11933/j.issn.1007-9289.20181119002 |
| 分类号:TG174.4;TB304 |
| 基金项目:国家自然科学基金(51722510, 21573259); 甘肃省杰出青年科学基金(1606RJDA31); 中国科学院“百人计划”项目 |
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| Preparation of Hydrogenated TiO2 Nanorods and Its Photocathodic Protection Properties of Q235 Carbon Steel |
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FENG Min1,2, LIU Ying2, ZHANG Sainan2, WEI Ning1, JI Li1, WANG Daoai1
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1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;2.School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
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| Abstract: |
| Corrosion protection of metals in marine engineering has become increasingly important with the gradual advancement of marine development. The photoelectric effect of semiconductors can be utilized to provide photocathodic protection for metals. To improve the low light absorption and low conversion efficiency of currently-used TiO2 photoelectrodes, one-dimensional TiO2 nanorod arrays were constructed on FTO conductive glasses through hydrothermal method, and then hydrogenated to enhance the light absorption and photocurrent density of pure TiO2 nanorod arrays. The photocathodic protection effects of hydrogenated TiO2 nanorods on Q235 carbon steel in seawater environment show that photocurrent density of hydrogenated TiO2 nanorods reaches 2.12 mA/cm2 with good stability. When Q235 carbon steel is coupled to hydrogenated TiO2 nanorod electrodes under simulated sunlight, the interfacial reaction resistance becomes smaller and the electrode potential is 349 mV lower than the corrosion potential of Q235 carbon steel. It indicates that the hydrogenated TiO2 nanorods can produce good photocathodic protection effects on carbon steel, and the effects can be maintained for more than 7 h under dark condition. |
| Key words: TiO2 nanorods hydrogenation treatment Q235 carbon steel photocathodic protection corrosion |