In:
Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 800 ( 2013-9), p. 447-453
Abstract:
This work demonstrated the synthesis of SiO 2 -P 2 O 5 -SnO 2 -ZnO quaternary porous aerogel by sol-gel followed supercritical carbon dioxide drying, starting from tetraethoxysilane (TEOS) as precursor for SiO 2 and triethyl phosphate, tin (iv) chloride pentahydrate and zinc nitrate hexahydrate as precursor for P 2 O 5 -SnO 2 -ZnO. It has been recorded that prepared P 2 O 5 -SnO 2 -ZnO sol was added to silica sol, then formed the quaternary aerogel by base catalyst. The microstructure, morphology and properties of the quaternary aerogel were studied by TG/DTA, FTIR, solid-state 29 Si NMR, BET, scanning electron microscopy (SEM) measurement and BJH nitrogen gas adsorption. The silica aerogels tetrahedral subunit structure and the influence of the loaded oxide have been observed. The results indicated that the quaternary aerogel exhibited average pore diameter of 14.15 nm, cumulative pore volume of 2.31 ml/g, the specific surface area as high as 796.29 m 2 /g and bulk density of 0.275g/cm 3 . There were four types of Si (O 1/2 ) 4 tetrahedral unit structure in the quaternary aerogel. From this study, different chemical bond of P 2 O 5 -SnO 2 -ZnO penetrated into the silica network structure.
Type of Medium:
Online Resource
ISSN:
1662-8985
DOI:
10.4028/www.scientific.net/AMR.800
DOI:
10.4028/www.scientific.net/AMR.800.447
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2013
detail.hit.zdb_id:
2265002-7
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