| 第 44 卷第 4 期 |  | Vol. 44 No. 4 | | 2014 年 8 月 | Aug 2014 |
|
所屬欄目：功能材料
電化學(xué)石英晶體微天平研究重氮鹽的電還原過(guò)程 |
| 張青芳1，曾 明1，黃健英2
（1. 長(cháng)沙醫學(xué)院 基礎醫學(xué)系， 湖南 長(cháng)沙 400219； 2. 湖南師范大學(xué) 化學(xué)化工學(xué)院， 湖南 長(cháng)沙 400081） |
| 摘 要：采用壓電電化學(xué)石英晶體微天平（EQCM）技術(shù)研究了硫酸重氮鹽在裸金電極（Au）和多壁碳納米管（MWCNTs）修飾金電極上的電還原行為，比較了2種電極上電沉積質(zhì)量和穩定性。結果表明，相同循環(huán)伏安掃描條件下，重氮鹽在金電極和MWCNTs／Au電極上的工作曲線(xiàn)還原峰電位相同，后者的初始峰電流低于前者，QCM數據顯示重氮鹽在MWCNTs／Au電極上沉積速度優(yōu)于金電極，飽和沉積量是金電極上的3倍，表明碳納米管催化了還原過(guò)程并增大了電極的表面積；在磷酸中性緩沖溶液中浸泡7 d后，重氮鹽修飾后的MWCNTs／Au電極表面質(zhì)量變化比金電極小0.28 ng，表明修飾后的MWCNTs／Au電極略穩定。 |
| 關(guān)鍵詞：重氮鹽；電還原；電化學(xué)石英晶體微天平 |
| 中圖分類(lèi)號：TQ150 文獻標識碼：A 文章編號：1009-9212（2014）04-0055-04 |
|
| Study on Electro-reduction of Benzenediazonium Sulfate with Electrochemical Quartz Crystal Microbalance |
| ZHANG Qing-fang1, ZENG Ming1, HUANG Jian-ying2
(1. Department of Chemistry, Faculty of Preclinical Medicine, Changsha Medical University, Changsha 400219, China; 2. College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China) |
| Abstract：The electrochemical quartz crystal microbalance(EQCM) technique was used to study the adsorption and electro-reduction behavior of benzenediazonium sulfate on bare and multi-walled carbon nanotubes(MWCNTs) modified gold electrodes. Diazonium salt could be similarly adsorbed on the surface of Au electrode and MWCNTs/Au electrode by cyclic voltammetry, the reduction peak potentials were the same and the peak current of the later was lower than that of the former. The adsorption amount of diazonium salts on MWCNTs/Au electrode was three times of that on Au electrode, indicating that the electro-reduction was catalyzed and the electrode surface area was increased by MWCNTs. The mass variation of MWCNTs/Au electrode was 0.28 ng smaller than bare Au electrode after immersed for 7 days in PBS, meaning the film on the former was slightly more stable than on the later. |
| Key words：diazonium salts; electro-reduction; electrochemical quartz crystal microbalance |
|
基金項目：石英晶體微天平用于堿性磷酸酶標記抗原的電化學(xué)酶聯(lián)免疫分析（院級科研課題）。
|
作者簡(jiǎn)介：張青芳（1985-），女，湖南岳陽(yáng)人，講師，碩士，研究方向：電化學(xué)分析（E-mail：187364593@qq.com）。
|
收稿日期：2014-03-20
|
|