Preparation, characterization and application of Fe{sub 3}O{sub 4}/ZnO core/shell magnetic nanoparticles

Journal Article · Mon Aug 04 04:00:00 EDT 2008 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2007.07.035· OSTI ID:21144108

Hong, R Y ^[1]; Zhang, S Z ^[1]; Di, G Q ^[2]; Li, H Z ^[3]

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1. Chemical Engineering Department and Key Laboratory of Organic Synthesis of Jiangsu Province, Soochow University, SIP, Suzhou 215123 (China)
2. Department of Physics, Soochow University, Suzhou 215007 (China)
3. State Key Laboratory of Multiphase Reaction, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080 (China)

Fe{sub 3}O{sub 4} magnetic nanoparticles (MNPs) were synthesized by a co-precipitation method. The phase purity was confirmed by X-ray powder diffraction (XRD) analysis. The crystal size was found to be 10 nm from transmission electron microscopy (TEM). It is evidenced that the surface of Fe{sub 3}O{sub 4} MNPs was modified by sodium citrate. The Fe{sub 3}O{sub 4}/ZnO core/shell MNPs were obtained by coating the MNPs with direct precipitation using zinc acetate and ammonium carbonate. The precursor was firstly dried and then calcined at 350 deg. C. The antioxidation tests indicated that the core/shell MNPs give better antioxidation than that of the Fe{sub 3}O{sub 4} MNPs. The photocatalytic degradation of methyl orange revealed that the core/shell MNPs have higher photocatalytic activity than that of the ZnO nanoparticles. Separation of the core/shell MNPs from the aqueous suspension using a magnet provides an easy way to recycle the core/shell MNPs. After four-time recycling, the photocatalytic degradation percentage of the core/shell MNPs is about 70%.

• OSTI ID: 21144108
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 8-9 Vol. 43; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACETATES
AMMONIUM CARBONATES
COPRECIPITATION
IRON OXIDES
NANOSTRUCTURES
PHOTOCATALYSIS
SHELLS
SODIUM COMPOUNDS
SURFACES
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
ZINC OXIDES