Enhanced stability of a Prussian blue/sol-gel composite for electrochemical determination of hydrogen peroxide

被引：23

作者：

Doroftei, Florica ^{[1
]}

Pinteala, Tudor ^{[2
]}

Arvinte, Adina ^{[1
]}

机构：

[1] Petru Poni Inst Macromol Chem, Ctr Adv Res Nanobioconjugates & Biopolymers, Iasi 700487, Romania

[2] Univ London Imperial Coll Sci Technol & Med, Dept Bioengn, London SW7 2AZ, England

来源：

MICROCHIMICA ACTA | 2014年 / 181卷 / 1-2期

关键词：

sol-gel; Prussian blue; hydrogen peroxide reduction; MODIFIED ELECTRODES; FILMS; GLUCOSE; BIOSENSOR; POLYPYRROLE; REDUCTION;

D O I：

10.1007/s00604-013-1076-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We have prepared a sol-gel that incorporates Prussian Blue (PB) as a redox mediator. It is shown that the PB in the pores of the sol-gel retains its electrochemical activity and is protected from degradation at acidic and neutral pH values. TEM and EDX studies revealed the PB nanoparticles to possess a cubic crystal structure and to be well entrapped and uniformly dispersed in the pores of the matrix. The electrocatalytic activity of the materials toward hydrogen peroxide (H2O2) was studied by cyclic voltammetry and amperometry. The modified electrode displays good sensitivity for the electrocatalytic reduction of H2O2 both in acidic (pH 1.4) and neutral media. The sensor has a dynamic range from 3 to 210 mu M of H2O2, and the detection limit is 0.6 mu M (at an SNR of 3).

引用

页码：111 / 120

页数：10

共 42 条

[1]

Ahammad J.S., 2013, J BIOSENS BIOELECTRO, V9, P1, DOI DOI 10.4172/2155-6210.S9-001

[2] Electrochemistry in solids prepared by sol-gel processes [J].