Electrosynthesis and characterization of composite polypyrrole-dextran-sulfite oxidase films

被引：4

作者：

Adeloju, SB ^{[1
]}

Ohanessian, A

Duc, NN

机构：

[1] Monash Univ, Sch Engn & Appl Sci, Water & Sensor Technol Res Grp, Churchill, Vic 3842, Australia

[2] Univ Western Sydney, Ctr Electrochem Res & Analyt Technol, Sydney, NSW, Australia

来源：

SYNTHETIC METALS | 2005年 / 153卷 / 1-3期

关键词：

electrochemical polymerization; control of interface structure and morphology; scanning electron microscopy; electrochemical methods; polypyrrole and derivatives; detectors;

D O I：

10.1016/j.synthmet.2005.07.226

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electrosynthesis of a composite polypyrrole-dextran-sulphite oxidase (PPy-Dex-SOx) film was carried out by galvanostatic polymerisation. The simultaneous formation of a conducting polypyrrole support and the entrapment of sulfite oxidase (SOx) on a platinum electrode was accomplished in an aqueous solution which contained 0.5 M pyrrole, 0.02 g/l dextran and 8 units/ml SOx at an applied current density of 0.25 mA/cm2 and a polymerization time of 25 sec. The conductivity of the resulting composite PPy-Dex-SOx film was as high as that of polypyrrolesulfite oxidase (PPy-SOx) film, but the presence of dextran improved the mechanical stability of the composite film. The presence of SOx in the composite film was confirmed by scanning electron microscopy and amperometric measurement of sulfite.

引用

页码：17 / 20

页数：4

共 17 条

[1] Electroimmobilisation of sulphite oxidase into a polypyrrole film and its utilisation for flow amperometric detection of sulphite [J].