Direct Electrochemistry and Electrocatalysis Behaviors of Glucose Oxidase Based on Hyaluronic Acid-Carbon Nanotubes-Ionic Liquid Composite Film

2010 ◽  
Vol 28 (10) ◽  
pp. 1890-1896 ◽  
Author(s):  
Xiaodong Shangguan ◽  
Jianbin Zheng ◽  
Hongfang Zhang ◽  
Hongsheng Tang
Keyword(s):  
Carbon Nanotubes ◽  
Ionic Liquid ◽  
Hyaluronic Acid ◽  
Composite Film ◽  
Glucose Oxidase ◽  
Direct Electrochemistry

Influence of ionic liquids on the direct electrochemistry of glucose oxidase entrapped in nanogold-N,N-dimethylformamide-ionic liquid composite film

2007 ◽  
Vol 52 (20) ◽  
pp. 6178-6185 ◽  
Author(s):  
Jiangwen Li ◽  
Cong Fan ◽  
Fei Xiao ◽  
Rui Yan ◽  
Shuangshuang Fan ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Composite Film ◽  
Glucose Oxidase ◽  
Direct Electrochemistry

Direct electrochemistry and electrocatalysis of horseradish peroxidase immobilized in hyaluronic acid and single walled carbon nanotubes composite film

2010 ◽  
Vol 64 (5) ◽  
Author(s):  
Qi Wang ◽  
Jianbin Zheng
Keyword(s):  
Carbon Nanotubes ◽  
Hyaluronic Acid ◽  
Horseradish Peroxidase ◽  
Composite Film ◽  
Direct Electrochemistry ◽  
Phosphate Buffer Solution ◽  
Single Walled Carbon Nanotubes ◽  
Solution Ph ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

AbstractDirect electrochemistry and electrocatalysis of horseradish peroxidase (HRP) immobilized on a hyaluronic acid (HA)-single walled carbon nanotubes (SCNs) composite film coated glassy carbon electrode (GCE) was studied for the first time. HRP entrapped in the SCNs-HA composite film exhibited a pair of well-defined, quasi-reversible cyclic voltammetric peaks in a 0.1 M phosphate buffer solution (pH 7.0). Formal potential vs. standard calomel electrode (E°′) was −0.232 V, and E°′ was linearly dependent on the solution pH indicating that the electron transfer was proton-coupled. The current is linearly dependent on the scan rate, indicating that the direct electrochemistry of HRP in that case is a surface-controlled electrode process. UV-VIS spectrum suggested HRP retained its original conformation in the SCNs-HA film. Immobilized HRP showed excellent electrocatalysis in the reduction of hydrogen peroxide (H2O2).

Sign in / Sign up

Export Citation Format

Share Document