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Titolo:
Preparation and characterization of Al2O3-TiO2 composite oxide nanocrystals
Autore:
Xiong, G; Wang, X; Lu, LD; Yang, XJ; Xu, YF;
Indirizzi:
Nanjing Univ Sci & Technol, Mat Chem Lab, Nanjing 210094, Peoples R China Nanjing Univ Sci & Technol Nanjing Peoples R China 210094 eoples R China
Titolo Testata:
JOURNAL OF SOLID STATE CHEMISTRY
fascicolo: 1, volume: 141, anno: 1998,
pagine: 70 - 77
SICI:
0022-4596(19981115)141:1<70:PACOAC>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
TITANATE-MULLITE COMPOSITE; THERMAL-SHOCK RESISTANCE; SOL-GEL PROCESS; ALUMINUM TITANATE; SURFACE-AREA; SUPPORTS; POROSITY; POWDERS;
Keywords:
nanocrystal; Al2O3-TiO2; characterization; catalysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Wang, X Nanjing Univ Sci & Technol, Mat Chem Lab, Nanjing 210094, Peoples R China Nanjing Univ Sci & Technol Nanjing Peoples R China 210094 China
Citazione:
G. Xiong et al., "Preparation and characterization of Al2O3-TiO2 composite oxide nanocrystals", J SOL ST CH, 141(1), 1998, pp. 70-77

Abstract

Al2O3-TiO2 composite oxide nanocrystals with different Al2O3/TiO2 ratios (1/4, 2/3, 3/2, and 4/1) were prepared by the poly(ethylene glycol) (PEG) sol-gel method, The preparation process was monitored by thermogravimetric analysis and differential scanning calorimetry (TGA-DSC), Nanocrystal particles of these composite oxides obtained at various heat-treating temperatures(400-1100 degrees C) were characterized in terms of morphology, size, specific surface area, composition, and structure by transmission electron microscopy (TEM), BET specific surface area analysis, and X-ray powder diffractometry (XRD), Nanoparticles of Al2O3-TiO2 with grain sizes in the range 1-150 nm and specific surface areas of 4.3-136 m(2)/g could be obtained under different conditions. The morphology of the particles changed from spherical to cubic with increasing heat-treatment temperature, Anatase was stabilized in these composite nanomaterials and the mechanism was discussed, The change of the particles specific surface areas with increase of the Al2O3/TiO2 ratio was researched. The Al2O3-TiO2 composite oxide nanocrystals could catalyze the polymerization of maleic anhydride and may provide a route to obtain a product without rings at the end groups. (C) 1998 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 08:47:23