WO_3/TiO_2纳米管复合膜的制备及其在光电化学防腐蚀中的应用
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- 英文论文题名：Preparation of WO_3/TiO_2 Nanotube Array Film and Its Application in Photoelectrochemical Anticorrosion
- 论文作者：梁燕 ; 胡娟 ; 官自超 ; 刘青 ; 王海鹏 ; 杜荣归
- 英文论文作者：Yang Liang ; Juan Hu ; Zi-Chao Guan ; Qing Liu ; Hai-Peng ; Wang ; Rong-Gui Du ; College of Chemistry and Chemical Engineering ; Xiamen University
- 年：2016
- 作者机构：厦门大学化学化工学院;
- 论文关键词：阳极氧化 ; 电沉积法 ; TiO2纳米管 ; WO3 ; 光生阴极保护
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十九分会：电化学材料
- 语种：中文
- 分类号：TB383.2;TG174.41
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十九分会 ; 电化学材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：118k
- 原文格式：D
- 会议级别：全国
摘要
通过阳极氧化法及退火处理首先在钛表面制备TiO_2纳米管阵列膜,再采用脉冲电沉积法在TiO_2纳米管表面沉积WO_3颗粒,获得了WO_3/TiO_2纳米管复合膜。通过设置沉积的循环次数,可以调控WO_3在TiO_2纳米管表面的沉积量。X射线衍射谱(XRD)、扫描电子显微镜(SEM)和能谱(EDX)等测试方法证明了WO_3/TiO_2复合膜的成功制备。TiO_2纳米管膜具有高度有序的阵列结构,WO_3颗粒均匀地沉积在TiO_2纳米管表面。以WO_3/TiO_2纳米管复合膜作为光阳极,研究其对403不锈钢的光生阴极保护性能。结果表明,与纯TiO_2纳米管薄膜相比,WO_3/TiO_2纳米管复合膜对不锈钢的光生阴极保护更有效。当光照停止后,复合膜仍可以对403不锈钢起一定的阴极保护作用。这是因为WO_3导带位置相对TiO_2的更负,TiO_2导带上的光生电子会迁移至WO_3,光生电子-空穴对得到有效的分离。此外,WO_3能够利用电子发生还原反应,进行能量存储,暗态下将存储的电子释放,对403不锈钢继续起阴极保护作用。
A highly ordered WO_3/TiO_2 nanotube array film was sucessfully prepared by an anodic oxidation method combined with a pulse electrodeposition technique. WO_3 nanoparticles were deposited uniformly on the TiO_2 nanotube film surface. Compared with a pure TiO_2 nanotube film, WO_3/TiO_2 nanotube array film could provide more effective photocathodic protection for 403 stainless steel. Because the conduction band edge of WO_3 is lower than that of TiO_2, the photogenerated electrons were transferred from the conduction band of TiO_2 to the conduction band of WO_3, and the electon-hole pairs were efficiently separated. The electrons transferred through TiO_2 to WO_3 induced cation intercalattion in WO_3, and the reductive energy was stored. When the light was turned off, the electrons were released and continuously transferred to the 403 stainless steel, offering the cathodic protection for a long time.
A highly ordered WO_3/TiO_2 nanotube array film was sucessfully prepared by an anodic oxidation method combined with a pulse electrodeposition technique. WO_3 nanoparticles were deposited uniformly on the TiO_2 nanotube film surface. Compared with a pure TiO_2 nanotube film, WO_3/TiO_2 nanotube array film could provide more effective photocathodic protection for 403 stainless steel. Because the conduction band edge of WO_3 is lower than that of TiO_2, the photogenerated electrons were transferred from the conduction band of TiO_2 to the conduction band of WO_3, and the electon-hole pairs were efficiently separated. The electrons transferred through TiO_2 to WO_3 induced cation intercalattion in WO_3, and the reductive energy was stored. When the light was turned off, the electrons were released and continuously transferred to the 403 stainless steel, offering the cathodic protection for a long time.
引文
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[3]Cai,G.F.;Zhou,D.;Xiong,Q.Q.;Zhang,J.H.;Wang,X.L.;Gu,C.D.;Tu,J.P.Sol.Energ.Mat.Sol.C.2013,117:231.
[2]Zhou,M.J.;Zeng,Z.O.;Zhong,L.Corros.Sci.2009,51:1386.
[3]Cai,G.F.;Zhou,D.;Xiong,Q.Q.;Zhang,J.H.;Wang,X.L.;Gu,C.D.;Tu,J.P.Sol.Energ.Mat.Sol.C.2013,117:231.