炭气凝胶纳米颗粒固定葡萄糖氧化酶的直接电化学

利用间苯二酚和甲醛在碱性环境下制备炭气凝胶(CA),通过扫描电镜(SEM)、透射电镜(TEM)、比表面积测试Brunauer-Emmett.Teller(BET)等方法分析载体的形貌结构:以CA为载体通过吸附法固定葡萄糖氧化酶(GOD)并修饰玻碳(GC)电极,得到GOD/CA/GC电极.在0.1mol·L-1磷酸盐缓冲溶液中,利用循环伏安法研究了GOD/CA,GC电极的直接电化学行为和对葡萄糖的催化性能.结果表明,以CA为载体可以很好地固定GOD并保持其生物活性,在无任何电子媒介体存在时,GOD在电极上实现了直接电子转移,GOD/CA/GC电极对葡萄糖具有很好的电催化性能....

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Published in物理化学学报 Vol. 28; no. 12; pp. 2867 - 2873
Main Author 于志辉 宿婷婷 任翠华 李钒 夏定国 程水源
Format Journal Article
LanguageChinese
Published 北京工业大学环境与能源工程学院,北京100124%北京大学工学院,北京100871 2012
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ISSN1000-6818
DOI10.3866/PKU.WHXB201209201

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Summary:利用间苯二酚和甲醛在碱性环境下制备炭气凝胶(CA),通过扫描电镜(SEM)、透射电镜(TEM)、比表面积测试Brunauer-Emmett.Teller(BET)等方法分析载体的形貌结构:以CA为载体通过吸附法固定葡萄糖氧化酶(GOD)并修饰玻碳(GC)电极,得到GOD/CA/GC电极.在0.1mol·L-1磷酸盐缓冲溶液中,利用循环伏安法研究了GOD/CA,GC电极的直接电化学行为和对葡萄糖的催化性能.结果表明,以CA为载体可以很好地固定GOD并保持其生物活性,在无任何电子媒介体存在时,GOD在电极上实现了直接电子转移,GOD/CA/GC电极对葡萄糖具有很好的电催化性能.
Bibliography:11-1892/06
YU Zhi-Hui, SU Ting-Ting, REN Cui-Hua, LI Fan, XIA Ding-Guo, CHENG Shui-Yuan(1 College of Environmental and Energy Engineering, Beijing University of Technology, Beo'ing 100124, P. R. China; 2College of Engineering, Peking University, Beijing 100871, P. R. China)
Nano-carbon aerogels (CA) were prepared by the reaction between resorcinol and formaldehyde in alkaline conditions. The morphology and microstructure of the CA was investigated by scanning electron microscopy and transmission electron microscopy. The specific area and the pore size distribution were calculated from the N2 adsorption-desorption isotherm. Glucose oxidase (GOD)/CA/ glassy carbon (GC) electrodes were prepared by immobilizing GOD on the surface of nano-carbon aerogels. The electrocatalytic properties of GOD/CA/GC electrodes were characterized by cyclic voltammetry in phosphate buffer medium (0.1 mol. L-1). The results showed that GOD can be immobilized on the nano-carbon aerogels, and that the biological activation of GOD was ret
ISSN:1000-6818
DOI:10.3866/PKU.WHXB201209201