外加电压对阳极氧化钛纳米阵列结构的影响  

Effect of Applied Voltage on the Microstructure of Aligned Titania Nanotubes Fabricated by Anodic Oxidation Method

作　　者：李洪义[1] 白新德[1] 凌云汉[1] 李娟[1] 张岱岚[1] 王金淑[2] 

机构地区：[1]清华大学,北京100084 [2]北京工业大学,北京100022

出　　处：《稀有金属材料与工程》2007年第7期1257-1259,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50371044);教育部新世纪优秀人才资助项目

摘　　要：采用阳极氧化在钛基体上原位合成了自组装有序的纳米管TiO2薄膜材料,采用的电解质溶液为0.5mol/LNH4HF2+1mol/LNH4H2PO4水溶液。通过XRD,SEM对TiO2纳米管进行表征。研究表明,外加电压对TiO2薄膜的微观结构有很大的影响。在外加电压为20V时,氧化8h可得到长度为2μm,内径为80nm,外径为100nm的TiO2纳米阵列。经300℃热处理后,可得到锐钛矿型的TiO2。通过对成膜工艺的研究,提出了阳极氧化法制备有序TiO2纳米管的成膜机制。The thin films of order-aligned titania nanotubes were fabricated by anodic oxidation method in the electrolyte of 0.5 mol/L NH4HF2＋ 1 mol/L NH4HePO4 aqueous solution and characterized by X-ray Diffraction （XRD）, Scanning Electronic Microscopy （SEM）, and Transmission Electronic Microscopy （TEM）. The experiment results show that the applied voltage has a great effect on the microstructures of the thin films of titania nanotubes. The order-aligned titania nanotubes of 1.8 μm in length, of 100 nm in outer diameter and 80 nm in inner diameter have been prepared at the voltage of 20 V for 8h in the electrolyte of 0.5 mol/L NH4HF2＋ 1 mol/L NH4HePO4 aqueous solution. The titania crystals in anatase type were obtained after annealed at 300 ℃ for 2 h with the heating rate of 10 ℃/min. The growth mechanism of titania nanotubes was proposed via the study on the fabrication processing in this paper.

关 键 词：阳极氧化 TIO2 纳米管 

分 类 号：TB383.1[一般工业技术—材料科学与工程]