Wang Ning, Wang Jing, Liu Mengnan, Ge Chengyue, Hou Baorong, Liu Nazhen, Ning Yanli, Hu Yiteng
CAS Key Laboratory of Marine Envirinmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao, 266071, People's Republic of China.
Open Studio for Marine Corrosion and Protection, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, People's Republic of China.
Sci Rep. 2021 Apr 5;11(1):7509. doi: 10.1038/s41598-021-87132-y.
FeS/TiO nanotube array composite films with clean, high efficiency, low cost and low consumption were prepared by electrochemical anodization and hydrothermal methods. The modification of FeS nanoparticles on the surface of TiO nanotube array film not only broadens the light absorption range of TiO, but also improves the utilization ratio of visible light and the separation rate of photogenerated electron-hole pairs, which greatly improves the photoelectrochemical cathodic protection performance of TiO for 304 stainless steel (304SS). Under visible light irradiation, the open circuit potential of 304SS coupled with the FeS/TiO nanocomposite films decreased from - 170 to - 700 mV, and the electrode potential can still maintained at - 400 mV after the light was turned off. Compared with pure TiO nanotube array film, FeS/TiO nanocomposite film has better photoelectrochemical cathodic protection effect on 304SS in 3.5 wt% NaCl corrosion medium.
采用电化学阳极氧化法和水热法制备了具有清洁、高效、低成本和低消耗特点的FeS/TiO纳米管阵列复合薄膜。FeS纳米颗粒在TiO纳米管阵列薄膜表面的修饰不仅拓宽了TiO的光吸收范围，还提高了可见光利用率和光生电子-空穴对的分离率，极大地提高了TiO对304不锈钢（304SS）的光电化学阴极保护性能。在可见光照射下，与FeS/TiO纳米复合薄膜耦合的304SS的开路电位从-170 mV降至-700 mV，关灯后电极电位仍可维持在-400 mV。与纯TiO纳米管阵列薄膜相比，FeS/TiO纳米复合薄膜在3.5 wt% NaCl腐蚀介质中对304SS具有更好的光电化学阴极保护效果。
