使用有机电解质制备高度有序的二氧化钛纳米管阵列。

Fabrication of highly ordered TiO2 nanotube arrays using an organic electrolyte.

作者信息

Ruan Chuanmin, Paulose Maggie, Varghese Oomman K, Mor Gopal K, Grimes Craig A

机构信息

Department of Electrical Engineering and Department of Materials Science and Engineering, 217 Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.

出版信息

J Phys Chem B. 2005 Aug 25;109(33):15754-9. doi: 10.1021/jp052736u.

DOI:10.1021/jp052736u

PMID:16852999

Abstract

Anodization of titanium in a fluorinated dimethyl sulfoxide (DMSO) and ethanol mixture electrolyte is investigated. The prepared anodic film has a highly ordered nanotube-array surface architecture. Using a 20 V anodization potential (vs Pt) nanotube arrays having an inner diameter of 60 nm and 40 nm wall thickness are formed. The overall length of the nanotube arrays is controlled by the duration of the anodization, with nanotubes appearing only after approximately 48 h; a 72 h anodization results in a nanotube array approximately 2.3 mum in length. The photoelectrochemical response of the nanotube-array photoelectrodes is studied using a 1 M KOH solution under both UV and visible (AM 1.5) illumination. Enhanced photocurrent density is observed for samples obtained in the organic electrolyte, with an UV photoconversion efficiency of 10.7%.

摘要

研究了在氟化二甲基亚砜（DMSO）和乙醇混合电解质中对钛进行阳极氧化。制备的阳极膜具有高度有序的纳米管阵列表面结构。使用20 V阳极氧化电位（相对于Pt）形成内径为60 nm且壁厚为40 nm的纳米管阵列。纳米管阵列的总长度由阳极氧化的持续时间控制，纳米管仅在大约48小时后出现；72小时的阳极氧化产生长度约为2.3μm的纳米管阵列。在紫外光和可见光（AM 1.5）照射下，使用1 M KOH溶液研究了纳米管阵列光电极的光电化学响应。观察到在有机电解质中获得的样品的光电流密度增强，紫外光转换效率为10.7%。