Konjac glucomannan/graphene oxide hydrogel with enhanced dyes adsorption capability for methyl blue and methyl orange

Lu Gan, Songmin Shang, Enling Hu, Chun Wah Marcus Yuen, Shou-xiang Kinor Jiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

112 Citations (Scopus)

Abstract

In the present study, the graphene oxide (GO) filled konjac glucomannan (KGM) hydrogel was prepared by using calcium oxide as the crosslinker. The structure of the prepared KGM/GO hydrogel was characterized. The prepared hydrogel was then used to adsorb methyl orange (MO) and methyl blue (MB) in aqueous solutions. Due to the presence of GO, KGM/GO hydrogel showed much enhanced adsorbing performance to both MO and MB compared to neat KGM hydrogel. The adsorption kinetics of the hydrogel was studied. The prepared hydrogel fitted for the pseudo-second-order kinetics model better. The adsorption isotherm of the MO and MB onto KGM/GO hydrogel was also studied and the results suggested that the both MO and MB adsorption behaviors fitted for the Freundlich isotherm model better. The prepared KGM/GO has application potentials to be as the adsorbent for water purifications.
Original languageEnglish
Pages (from-to)866-872
Number of pages7
JournalApplied Surface Science
Volume357
DOIs
Publication statusPublished - 1 Dec 2015

Keywords

  • Dyes adsorption performance
  • Graphene oxide
  • Hydrogel
  • Konjac glucomannan

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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