Preparation and electrocatalytic activity of gold nanoparticle embedded in highly ordered TiO2 nanotube array electrode for electro-oxidation of galactose
Preparation and electrocatalytic activity of gold nanoparticle embedded in highly ordered TiO2 nanotube array electrode for electro-oxidation of galactose
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DOI：
10.1179/1743294411y.0000000012
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发表时间：
2011-09
影响因子：
2.8
通讯作者：
Mir Ghasem Hosseini;M. Momeni;M. Faraji
中科院分区：
文献类型：
--
作者：
Mir Ghasem Hosseini;M. Momeni;M. Faraji
采用电沉积法在TiO 2纳米管/Ti电极上制备了高比表面积的金纳米颗粒-TiO 2纳米管电极。通过在含二甲基亚砜氟化物的电解液中对钛箔进行阳极氧化制备了TiO 2纳米管/Ti电极。扫描电子显微镜和能量色散X射线光谱的结果表明，二氧化钛纳米管层由约60-90 nm的直径的单独的管，和金纳米粒子的尺寸范围为30-40 nm的分散良好的表面上的二氧化钛纳米管的支持。采用循环伏安法研究了金纳米粒子-TiO 2纳米管电极对半乳糖电氧化的电催化性能。与纯金电极相比，金纳米颗粒-TiO 2纳米管电极表现出更高的电化学活性。该电极可重复使用，对半乳糖氧化具有稳定的电催化活性。
Gold nanoparticle–TiO2 nanotube electrodes with high surface area have been successfully prepared using a two step process consisting of galvanic deposition of gold nanoparticles on TiO2 nanotubes/Ti electrodes as support. TiO2 nanotubes/Ti electrodes are fabricated by anodising titanium foil in a dimethyl sulphoxide fluoride containing electrolyte. Scanning electron microscopy and energy dispersive X-ray spectroscopy results indicate that the TiO2 nanotube layers consist of individual tubes of about 60–90 nm diameters, and gold nanoparticles with a size range of 30–40 nm are well dispersed on the surface of the TiO2 nanotube support. The electrocatalytic properties of gold nanoparticle–TiO2 nanotube electrodes towards the electro-oxidation of galactose are investigated by cyclic voltammetry. Compared with pure gold electrodes, gold nanoparticles–TiO2 nanotube electrodes show much higher electrochemical activity. This novel electrode can be used repeatedly and exhibits stable electrocatalytic activity for galactose oxidation.