Tungstocobaltate-pillared layered double hydroxides: Preparation, characterization, magnetic and catalytic properties

Journal Article · Sun Jun 15 00:00:00 EDT 2008 · Journal of Solid State Chemistry

OSTI ID:21128310

Xiaocui, Wei ^[1]; Youzhi, Fu ^[2]; Fengyan, Li; Bo, Bi; Xizheng, Liu ^[1]

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1. Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024 (China)
2. Department of Chemistry, Baicheng Teacher's College, Baicheng 137000 (China)

A new polyoxometalate anion-pillared layered double hydroxide (LDH) was prepared by aqueous ion exchange of a Mg-Al LDH precursor in nitrate form with the tungstocobaltate anions [CoW{sub 12}O{sub 40}]{sup 5-}. The physicochemical properties of the product were characterized by the methods of powder X-ray diffraction, elemental analysis, infrared spectroscopy, thermogravimetric analysis and cyclic voltammetry. It was confirmed that [CoW{sub 12}O{sub 40}]{sup 5-} was intercalated between the brucite-type layers of the LDHs without a change in the structure. Magnetic measurement shows the occurrence of antiferromagnetic interactions between the magnetic centers. The investigation of catalytic performance for this sample exhibits high activity for the oxidation of benzaldehyde by hydrogen peroxide. - Graphical abstract: A tungstocobaltate anion [CoW{sub 12}O{sub 40}]{sup 5-} pillared layered double hydroxide (LDH) was prepared by aqueous ion exchange with a Mg-Al LDH precursor in nitrate form, demonstrating that [CoW{sub 12}O{sub 40}]{sup 5-} was intercalated between the brucite-type layers of the LDHs without change in structure. Magnetic measurement shows the occurrence of antiferromagnetic interactions between the magnetic centers. The investigation of catalytic performance for this sample exhibits high activity for the oxidation of benzaldehyde by hydrogen peroxide.

• OSTI ID: 21128310
• Journal Information: Journal of Solid State Chemistry, Vol. 181, Issue 6; Other Information: DOI: 10.1016/j.jssc.2008.02.030; PII: S0022-4596(08)00113-8; Copyright (c) 2008 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
ABSORPTION SPECTROSCOPY
ALUMINIUM HYDROXIDES
ANIONS
ANTIFERROMAGNETISM
BENZALDEHYDE
COBALT COMPOUNDS
HYDROGEN PEROXIDE
INFRARED SPECTRA
LAYERS
MAGNESIUM HYDROXIDES
NITRATES
OXIDATION
OXIDES
THERMAL GRAVIMETRIC ANALYSIS
TUNGSTEN COMPOUNDS
VOLTAMETRY
X-RAY DIFFRACTION