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Reduced graphene oxide composites with MWCNTs and single crystalline hematite nanorhombohedra for applications in water purification

Title
Reduced graphene oxide composites with MWCNTs and single crystalline hematite nanorhombohedra for applications in water purification
Author
이선영
Keywords
Hydrothermal synthesis; Photocatalysis; Hematite; Reduced graphene oxide; Multi-walled carbon nanotubes; VISIBLE-LIGHT PHOTOCATALYSTS; CARBON NANOTUBE COMPOSITE; CDS NANOPARTICLES; RHODAMINE-B; OXIDATION; NANOSTRUCTURES; NANOCOMPOSITES; PERFORMANCE; NANORODS; ENERGY
Issue Date
2015-01
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v. 40, No. 1, Page. 767-778
Abstract
We report nanostructured composites based on single crystal hematite (Fe2O3), reduced graphene oxide (RGO) and functionalized multi-walled carbon nanotubes (MWCNTs), which were synthesized via the hydrothermal method. The Fe2O3/MWCNT/RGO composite exhibits enhanced photocatalytic activity in terms of the degradation of Rhodamine B under visible irradiation compared with Fe2O3, or the Fe2O3/MWCNT or Fe2O3/RGO composites. The Fe2O3 and composite samples were analyzed using X-ray diffraction, field-emission scanning electron microscopy, high-resolution transmission electron microscopy, Brunauer-Emmett-Teller theory, and ultraviolet visible spectrophotometry. From these analyses, we find that a uniform distribution of MWCNTs and RGO sheets with Fe2O3 nanorhombohedra results in an increase in the specific surface area and optical absorbance, as well as a reduction in the charge carrier recombination rate, and favorable charge transport properties were observed using photoelectrochemical measurements. This synthesis method represents a technique for fabrication of composite materials with low cost, and that are suitable for photocatalysis, with potential applications in water purification. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0360319914023842?via%3Dihubhttp://hdl.handle.net/20.500.11754/35427
ISSN
0360-3199; 1879-3487
DOI
10.1016/j.ijhydene.2014.08.084
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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