UV–Ozone Treatments Improved Carbon Black Surface for Direct Electron-transfer Reactions with Bilirubin Oxidase under Aerobic Conditions

Abstract

Direct electron-transfer reactions of bilirubin oxidase (BOD) adsorbed onto carbon black (CB) were observed. Heterogeneous electron-transfer rate constants (k°) between BOD and CB were evaluated by analyzing steady-state catalytic voltammograms using a rotating electrode system. By the use of CB treated with UV–ozone, improvements in k° values were observed.

Fabrication and Characterization of Glucose Fuel Cells with a Microchannel Fabricated on Flexible Polyimide Film

“…This value was almost three orders of magnitude lower than that of the anode. The stirring of fuel and bubbling of oxygen, have resulted in a high current density as reported before [6,22,[25][26][27][28]. In this study, a high current density on reduction was not realized because the oxygen concentration in the fuel was probably low.…”

Bioelectrocatalytic Oxygen Reaction and Chloride Inhibition Resistance of Laccase Immobilized on Single-walled Carbon Nanotube and Carbon Paper Electrodes

“…Before use, its surface was first treated with ultraviolet-ozone for 3 min, as described previously. 26,27 After synthesis, the fresh SWCNT electrode was immersed in 0.1 mol dm ¹3 acetate buffer solution (pH 5) containing 10 µmol dm ¹3 Lac for 30 min. For the carbon paper electrode, this modification time was increased to 60 min.…”

Improved Direct Electrochemistry for Proteins Adsorbed on a UV/Ozone-Treated Carbon Nanofiber Electrode

“…This result was in good agreement with a previous report that a greatly improved DET of BOD was observed after a UV/ozone treatment for the CB electrode. 29 The increased DET-type cathodic current indicated the efficient catalytic reduction of O2, since the cathodic current was largely suppressed in the absence of O2, which is shown in the image of Fig. 6a.…”

“…In recent years, some groups reported improved DET of BOD or cyt c using UV/ozone treated carbon based materials, such as CNT and carbon black (CB). 28,29 This method is a simple and mild process, which is convenient to apply for other carbon-based nanomaterials.…”