Encapsulating benzoquinone and glucose oxidase with a PEDOT film: application to oxygen-independent glucose sensors and glucose/O2 biofuel cells.
A modified electrode was proposed based on the sequential coating to immobilize both p-benzoquinone (BZQ) and glucose oxidase (GOD). Three electrodes, A, B, and C, were prepared separately by drop-coating the BZQ solution dissolved in different solvents on the stainless-steel/carbon (ssteel/C). Among those three electrodes, electrode B shows the best sensitivity of 2.21mAM(-1)cm(-2), a linear concentration range of 1.1-15 mM and a response time of 100 s at a sensing potential of 0.3V. The responses of interferences, including ascorbic acid, dopamine, uric acid and acetaminophen, were approximately 0%, 1.4%, approximately 0% and 3%, respectively, taken the sensing current at 6.0mM glucose as 100%. In a test of the human blood sample, an error of +3.6% was noticed for electrode B. Besides, for the biofuel cell application, maximum power densities reached 18.9 and 22.5 microW/cm(2) at 25 and 37 degrees C, respectively, with an all-solution-type biocathode.
Nien
Po-Chin
PC
Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
Wang
Jen-Yuan
JY
Chen
Po-Yen
PY
Chen
Lin-Chi
LC
Ho
Kuo-Chuan
KC
D016227:Benzoquinones / Q000737:chemistry*; D001674:Bioelectric Energy Sources; D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry*; D004566:Electrodes; D005947:Glucose / Q000737:chemistry*; D005949:Glucose Oxidase / Q000737:chemistry*; D006801:Humans; D010100:Oxygen / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D015203:Reproducibility of Results; D013997:Time Factors
D016227:Benzoquinones; D056804:Biofuels; D019086:Bridged Bicyclo Compounds, Heterocyclic; D011108:Polymers; C121383:poly(3,4-ethylene dioxythiophene); C004532:quinone; D005949:Glucose Oxidase; D005947:Glucose; D010100:Oxygen