Next Article in Journal
Micellar Parameters of Aqueous Solutions of Tween 20 and 60 at Different Temperatures: Volumetric and Viscometric Study
Next Article in Special Issue
The Impact of Biosurfactants on Microbial Cell Properties Leading to Hydrocarbon Bioavailability Increase
Previous Article in Journal
Effect of Ionic Compounds of Different Valences on the Stability of Titanium Oxide Colloids
Article Menu

Export Article

Open AccessArticle
Colloids Interfaces 2018, 2(3), 33; https://doi.org/10.3390/colloids2030033

Cholate Adsorption Behavior at Carbon Electrode Interface and Its Promotional Effect in Laccase Direct Bioelectrocatalysis

Department of Chemistry and Applied Chemistry, Graduate School of Science and Engineering, Saga University, Saga 840-8502, Japan
*
Author to whom correspondence should be addressed.
Received: 11 July 2018 / Revised: 4 August 2018 / Accepted: 12 August 2018 / Published: 21 August 2018
(This article belongs to the Special Issue Biosurfactants: Trends and Applications)
Full-Text   |   PDF [1867 KB, uploaded 21 August 2018]   |  

Abstract

Fast electron transfer between laccase (Lac) and single-walled carbon nanotubes (SWCNTs) can be achieved at a cholate-modified SWCNT interface. Furthermore, the catalytic reduction of O2 starts at a high potential, close to the equilibrium redox potential of the O2/H2O couple. A sodium cholate (SC)-modified electrode interface provides suitable conditions for Lac direct bioelectrocatalysis. In the present study, the SC promotional effect in Lac direct bioelectrocatalysis was investigated using various types of electrode materials. The fully hydrophilic surface of indium tin oxide and an Au electrode surface did not show a SC promotional effect, because SC did not bind to these surfaces. A carbon surface with a large number of defects was unsuitable for SC binding because of hydrophilic functional groups at the defect sites. Carbon surfaces with few defects, for example, basal-plane highly oriented pyrolytic graphite (HOPG), gave a SC promotional effect. View Full-Text
Keywords: cholate; laccase; adsorption; bioelectrocatalysis; electron transfer; carbon electrode cholate; laccase; adsorption; bioelectrocatalysis; electron transfer; carbon electrode
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Tominaga, M.; Tsutsui, M.; Takatori, T. Cholate Adsorption Behavior at Carbon Electrode Interface and Its Promotional Effect in Laccase Direct Bioelectrocatalysis. Colloids Interfaces 2018, 2, 33.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Colloids Interfaces EISSN 2504-5377 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top