Encapsulation of a living bioelectrode by a hydrogel for bioelectrochemical systems in alkaline media

Shuiliang Chen, Fangfang Yang, Chungen Li, Suqing Zheng, Hua Zhang, Ming Li, Haimin Yao, Feng Zhao, Haoqing Hou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

The electroactive biofilms in the bioelectrodes of traditional bioelectrochemical systems (BES) directly interact with the aqueous solution and usually require a mild aqueous solution environment (e.g. 20 mM acetate and pH = 7.0) to exert their optimum bioelectrocatalytic activity. In this communication, we present a concept of encapsulation of a bioelectrode by a hydrogel for a BES in an alkaline solution environment. A hydrogel-bioelectrode (HBE) was prepared by encapsulating a living electroactive biofilm pre-grown in the bioelectrode with a poly(vinyl alcohol) hydrogel through a freezing/thawing process. Under the protection of the hydrogel, the HBE could keep a high bioelectrocatalytic activity in an alkaline feeding solution with an acetate concentration of over 80 mM and a pH value of 11.0. Moreover it was very stable and tolerated low-frequency ultrasonic vibration. These results imply the extended applications of BESs in the area of high-strength wastewater treatment, portable and implantable devices.
Original languageEnglish
Pages (from-to)4641-4646
Number of pages6
JournalJournal of Materials Chemistry B
Volume3
Issue number23
DOIs
Publication statusPublished - 21 Jun 2015

ASJC Scopus subject areas

  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)

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