Synthesis and Properties of P₂O₅-SnO₂-ZnO Penetrated into Silica Aerogel Matrix by Sol-Gel Technique

Abstract:

This work demonstrated the synthesis of SiO₂-P₂O₅-SnO₂-ZnO quaternary porous aerogel by sol-gel followed supercritical carbon dioxide drying, starting from tetraethoxysilane (TEOS) as precursor for SiO₂ and triethyl phosphate, tin (iv) chloride pentahydrate and zinc nitrate hexahydrate as precursor for P₂O₅-SnO₂-ZnO. It has been recorded that prepared P₂O₅-SnO₂-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 ²⁹Si 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 m²/g and bulk density of 0.275g/cm³. There were four types of Si (O_1/2)₄ tetrahedral unit structure in the quaternary aerogel. From this study, different chemical bond of P₂O₅-SnO₂-ZnO penetrated into the silica network structure.

• Periodical: Advanced Materials Research (Volume 800)
• Pages: 447-453
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.800.447
• Online since: September 2013
• Authors: He Fang, Zhu Ying Wu, Yu Hong Huang, Xian Wen Xiong, Rui Zhu Zhang, Qiu Hua Ma, Zhu He, Rong Chun Li, De Yin Zhang, Xiang Yiang Zhou
• Keywords: P₂O₅-SnO₂-ZnO, Quaternary Porous Aerogel, Silica Aerogel Matrix, Sol-Gel Technique

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