Enhanced electron transfer mediator based on biochar from microalgal sludge for application to bioelectrochemical systems

Ja Hyun Lee, Dong Sup Kim, Ji Hyun Yang, Youngsang Chun, Hah Young Yoo, Sung Ok Han, Jinyoung Lee, Chulhwan Park, Seung Wook Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This study is focused on the utilization of waste microalgal sludge (MS) from microalgal extraction and its potential as an electrode material. The MS was activated under N2 at high temperature for conversion to biochar (MSB). In addition, cobalt (Co; metal hydroxide) and chitosan were used as a mediator for electron transfer by immobilization on MSB (MSB/Co/chitosan). Through analysis of the surface and components of the MSB/Co/chitosan, it was shown that Co and chitosan were properly synthesized with MSB. The enzymatic fuel cell (EFC) system successfully obtained a power density of 3.1 mW cm−2 and a current density of 9.7 mA cm−2. In addition, the glucose biosensors applied with the developed electron transfer mediator showed a sensitivity of 0.488 mA mM−1 cm−2.

Original languageEnglish
Pages (from-to)387-390
Number of pages4
JournalBioresource Technology
Volume264
DOIs
Publication statusPublished - 2018 Sep 1

Keywords

  • Biochar
  • Biosensor
  • Enzymatic fuel cell
  • Mediator
  • Microalgal sludge

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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