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| 细胞色素c在硅基有序介孔材料SBA-15上直接电化学行为 | |
| 引用本文： | 徐继明,张瑞娟,刘正会,尹起范.细胞色素c在硅基有序介孔材料SBA-15上直接电化学行为[J].淮阴师范学院学报(自然科学版),2008,7(4). |
| 作者姓名： | 徐继明 张瑞娟 刘正会 尹起范 |
| 作者单位： | 1. 江苏省低维材料化学重点建设实验室,淮阴师范学院化学系,江苏,淮安,223300 2. 延边大学,理学院化学系,吉林,延吉,133002 3. 江苏省低维材料化学重点建设 淮阴师范学院化学系,江苏 淮安 223300;延边大学,理学院化学系,吉林,延吉,133002 |
| 基金项目： | 江苏省教育厅自然科学基金资助项目(06KJB150011) |
| 摘 要： | 用水热法合成了硅基有序介孔分子材料SBA-15,研究了细胞色c(Cyt c)在SBA-15修饰玻碳(GC)电极表面的直接电化学行为.结果表明,在pH 7.0磷酸缓冲溶液中(PBS),细胞色素c在SBA-15修饰电极表面表现出一对准可逆的氧化还原峰,电位差ΔE为87 mV,式电位E0′为0.275 V,峰电流的大小与循环伏安扫描速度成正比,说明细胞色素c在电极表面过程是受表面控制.固定在电极上的细胞色素c能促进过氧化氢的催化还原,显示出较高的亲和力,为过氧化氢传感器的研制提供理论依据. |
| 关 键 词： | 介孔分子材料 细胞色素c 生物传感器 直接电子转移 过氧化氢 |
Direct Electrochemistry of Cyt c on Ordered Mesoporous Silica SBA-15 Modified Glassy Carbon Electrode |
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| XU Ji-ming,ZHANG Rui-juan,LIU Zheng-hui,YIN Qi-fan.Direct Electrochemistry of Cyt c on Ordered Mesoporous Silica SBA-15 Modified Glassy Carbon Electrode[J].Journal of Huaiyin Teachers College(Natrual Science Edition),2008,7(4). | |
| Authors: | XU Ji-ming ZHANG Rui-juan LIU Zheng-hui YIN Qi-fan |
| Institution: | XU Ji-ming1,ZHANG Rui-juan2,LIU Zheng-hui1,YIN Qi-fan1,2 (1.Jiangsu Key Laboratory for Chemistry of Low-dimensional Materials,Huaiyin Teachers College,Huaian Jiangsu 223300,China) (2.Department of Chemistry,College of Science,Yanbian University,Yanbian Jilin 133002,China) |
| Abstract: | Mesoporous SBA-15 was synthesized by using a hydrothermal method.Cytochrome c was immobilized on SBA-15 modified glassy carbon electrode.The interaction between Cytochrome c and SBA-15 was examined by using UV-Vis spectroscopy and electrochemical methods.The direct electron transfer of the immobilized Cytochrome c exhibited a pair of redox peaks with formal potential(E0′) of about 0.275 V(versus SCE) in 0.1mol/L pH 7.0 PBS.The electrode reaction showed a surface-controlled process with the apparent heterogeneous electron transfer rate constant(ks) of 2.25 s-1.Cytochrome c immobilized on the SBA15 modified electrode exhibits a remarkable electrocatalytic activity for the reduction of hydrogen peroxide(H2O2).Based on these,a third generation biosensor can be constructed for the determination of H2O2. |
| Keywords: | mesoporous molecular materials cytochrome c biosensor direct electron transfer hydrogen peroxide |
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