Bi_(2)S_(3)/CdSe共修饰TiO_(2)纳米管膜的构建及其光电化学阴极保护效应  

Fabrication and Photoelectrochemical Cathodic Protection Effect of Bi_(2)S_(3)/CdSe Co-modified TiO_(2)Nanotube Film

作　　者：王霞 官自超 时海燕[1] 金飘 刘国坤 杜荣归[1] WANG Xia;GUAN Zi-Chao;SHI Hai-Yan;JIN Piao;LIU Guo-Kun;DU Rong-Gui(State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen,Fujian 361005,China;State Key Laboratory of Marine Environmental Science,College of the Environment and Ecology,Xiamen University,Xiamen,Fujian 361102,China;CNOOC Changzhou Paint and Coatings Industry Research Institute Co.,Ltd.,Changzhou,Jiangsu 213016,China)

机构地区：[1]厦门大学化学化工学院,固体表面物理化学国家重点实验室,厦门361005 [2]厦门大学环境与生态学院,近海海洋环境科学国家重点实验室,厦门361102 [3]中海油常州涂料化工研究院有限公司,常州213016

出　　处：《无机化学学报》2022年第5期861-872,共12页Chinese Journal of Inorganic Chemistry

基　　金：国家重点研发计划(No.2018YFC0807201,2018YFC1602600);国家自然科学基金(No.21573182)资助。

摘　　要：为获得良好光电化学性能的TiO_(2)半导体复合膜,采用Bi_(2)S_(3)和CdSe对TiO_(2)纳米管膜进行共修饰。以阳极氧化法在Ti表面先制备TiO_(2)纳米管膜,再通过恒电流电沉积和连续离子层吸附反应在纳米管表面依次沉积CdSe和Bi_(2)S_(3),构建了具有级联能带结构的Bi_(2)S_(3)/CdSe共修饰的TiO_(2)纳米管复合膜。结果表明,Bi_(2)S_(3)/CdSe/TiO_(2)纳米管复合膜对可见光吸收显著增强,光电化学性能大幅度提高。白光照射下,复合膜的光电流密度为670μA·cm^(-2),达到了纯TiO_(2)纳米管膜的17.6倍。Bi_(2)S_(3)/CdSe/TiO_(2)复合膜作为光阳极可使0.5 mol·L^(-1) NaCl溶液中的403不锈钢的电位相对于腐蚀电位下降690 mV,显示出良好的光电化学阴极保护效应。In this work,Bi_(2)S_(3) and CdSe were used to modify a TiO_(2) nanotube film for obtaining a Bi_(2)S_(3)/CdSe/TiO_(2) composite film with enhanced photoelectrochemical performance.The TiO_(2) nanotube array film was fabricated on a Ti foil by anodic oxidation.CdSe was formed on the TiO_(2) nanotube film by constant current electrodeposition,and then Bi_(2)S_(3) was prepared on the binary CdSe/TiO_(2) composite film by successive ionic layer adsorption and reaction to obtain a Bi_(2)S_(3)/CdSe co-modified TiO_(2) nanotube composite film with a cascade band structure.The results showed that the Bi_(2)S_(3)/CdSe/TiO_(2) nanotube composite film showed enhanced photoabsorption in the visible light range,and its photoelectrochemical performance was greatly improved.Under white light illumination,the photocurrent density of this ternary composite film reached 670μA·cm^(-2),which was about 17.6 times that of the TiO_(2) nanotube film.The Bi_(2)S_(3)/CdSe/TiO_(2) composite film could provide excellent photoelectrochemical cathodic protection for 403 stainless steel(403SS)in a 0.5 mol·L^(-1) NaCl solution,and reduced the potential of 403SS by 690 mV relative to its corrosion potential.

关 键 词：TiO_(2)纳米管 Bi_(2)S_(3) CDSE 光电化学阴极保护 不锈钢 

分 类 号：TQ134.11[化学工程—无机化工] TB383.2[一般工业技术—材料科学与工程]