期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 2, 期 3, 页码 1881-1888出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2014.08.001
关键词
Graphene oxide; Iron oxide; Nanocomposites; Heterogeneous Fenton-like reaction; Acid Orange 7
资金
- Ministry of Higher Education Malaysia (MOHE)
- Universiti Teknologi MARA (UiTM)
- Australia Research Council [DP110103533]
- Australian Research Fellowship
- Australian Research Council Future Fellowship Program [FT130100405]
Well-dispersed iron oxide nanoparticles supported onto graphene oxide sheets (i.e. GO-Fe3O4 nanocomposite) were synthesised and used as heterogeneous Fenton-like catalyst for the degradation of Acid Orange 7 dye (AO7). The reaction was systematically investigated under various experimental conditions such as nanocomposite dosage, pH, temperature, oxidant and dye concentrations. Best results showed a fast 80% degradation in similar to 20 min, whilst similar to 98% of AO7 was successfully removed after 180 min of reaction time. The degradation kinetics of AO7 was most influenced by pH and temperature, and can be described by a pseudo-first-order reaction following the Langmuir-Hinshelwood mechanism. Analysis of the spent nanocomposite suggested that the phase of iron oxide nanoparticles remained unchanged whilst minor pore volume losses occurred via carbon deposition and/or re-stacking of GO sheets. (C) 2014 Elsevier Ltd. All rights reserved.
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