Self-assembled graphene oxide with organo-building blocks ofFe-aminoclay for heterogeneous Fenton-like reaction at near-neutralpH: A batch experiment

Title
Self-assembled graphene oxide with organo-building blocks ofFe-aminoclay for heterogeneous Fenton-like reaction at near-neutralpH: A batch experiment
Authors
허윤석
Keywords
Graphene oxide (GO) Fe-aminoclay Self-assembly Fenton-like reaction Neutral pH
Issue Date
2013
Publisher
APPLIED CATALYSIS B-ENVIRONMENTAL
Series/Report no.
APPLIED CATALYSIS B-ENVIRONMENTAL; vol.142 startpage 494 endpage 503
Abstract
Respective water-soluble graphene oxide (GO) and Fe-aminoclay were investigated for decoloration of recalcitrant organic dyes with different charges in the presence of hydrogen peroxide (H2O2). This oxidation process was updated in order to enable development of heterogeneous catalysts by self-assembled (precipitated) GO with organo-building blocks of Fe-aminoclay in aqueous solution. Due to electrostatic attraction between the negatively charged GO and the positively charged Fe-aminoclay, the obtained catalysts decomposed H2O2 at pH 6.0 to generate ?OH radicals capable of breaking aromatic carbon structures. These novel catalysts were tested for cationic methylene blue (MB) and anionic orange II (OII) as model pollutants. At 1.0 wt% of H2O2 treatment, the apparent rate constants of MB and OII by the optimal loading of catalyst (0.61 mg/mL) were 0.35288 h?1 (r2 = 0.9721) and 0.57930 (r2 = 0.9581), respectively. Furthermore, in the two-dye mixture system, simultaneous decoloration of both dyes, to near-complete ∼100% removal, was achieved after 5 h. Thus, it can be concluded that our developed catalysts for heterogeneous Fenton-like reaction at neutral pH are suitable for practical application.
URI
http://dspace.inha.ac.kr/handle/10505/32612
ISSN
0926-3373
Appears in Collections:
College of Engineering(공과대학) > Biotechnology (생명공학) > Journal Papers, Reports(생명공학 논문, 보고서)
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