A magnetic organic-inorganic composite: Synthesis and characterization of magnetic 5-aminosalicylic acid intercalated layered double hydroxides

Journal Article · Tue Nov 15 00:00:00 EST 2005 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2005.09.008· OSTI ID:20784788

Hui, Zhang ^[1]; Kang, Zou ^[1]; Hui, Sun ^[1]; Xue, Duan ^[1]

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1. Ministry of Education Key Laboratory of Science and Technology of Controllable Chemical Reactions, Box 98, Beijing University of Chemical Technology, Beijing 100029 (China)

A core-shell structured magnetic layered organic-inorganic material involving 5-aminosalicylic acid (5-ASA) intercalated Zn-Al layered double hydroxides (LDHs) and magnesium ferrite (MgFe{sub 2}O{sub 4}) is assembled by a coprecipitation method. The powder X-ray diffraction results show the coexistence of the clear but weak diffractions of MgFe{sub 2}O{sub 4} and ordered relatively stronger reflections of 5-ASA intercalated LDHs. The TEM image of magnetic 5-ASA intercalated LDHs reveals that the LDHs layer covers the MgFe{sub 2}O{sub 4} particles or their aggregates with particle size of 50-80 nm. The vibration sample magnetization (VSM) measurements exhibit the increase in saturation magnetization of magnetic 5-ASA intercalated LDHs samples with increasing amount of magnetic core. The XPS analyses account for a majority of Zn, Al and O atoms on the surface of magnetic particles. It is suggested that the magnetic core MgFe{sub 2}O{sub 4} was coated with LDHs layer probably through Zn-O-Mg and Al-O-Mg linkages, and a core-shell structured model is tentatively proposed.

• OSTI ID: 20784788
• Journal Information: Journal of Solid State Chemistry, Vol. 178, Issue 11; Other Information: DOI: 10.1016/j.jssc.2005.09.008; PII: S0022-4596(05)00403-2; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM HYDROXIDES
COPRECIPITATION
FERRITES
MAGNESIUM COMPOUNDS
MAGNET CORES
MAGNETIC CORES
MAGNETIC PROPERTIES
MAGNETIZATION
NANOSTRUCTURES
PARTICLE SIZE
STRUCTURAL MODELS
SYNTHESIS
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
ZINC HYDROXIDES