preparation and characterization of silica aerogel microspheres

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ID: 216925
2017
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Abstract
Silica aerogel microspheres based on alkali silica sol were synthesized using the emulsion method. The experimental results revealed that the silica aerogel microspheres (4–20 µm in diameter) were mesoporous solids with an average pore diameter ranging from 6 to 35 nm. The tapping densities and specific surface areas of the aerogel microspheres are in the range of 0.112–0.287 g/cm3 and 207.5–660.6 m2/g, respectively. The diameter of the silica aerogel microspheres could be tailored by varying the processing conditions including agitation rate, water/oil ratio, mass ratio of Span 80: Tween 80, and emulsifier concentration. The effects of these parameters on the morphology and textural properties of the synthesized silica aerogel microspheres were systematically investigated. Such silica aerogel microspheres can be used to prepare large-scale silica aerogels at an ambient pressure for applications in separation and high efficiency catalysis, which requires features of high porosity and easy fill and recovery.
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chen2017materialspreparation Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Qifeng Chen;Hui Wang;Luyi Sun
Journal Nature Materials
Year 2017
DOI
10.3390/ma10040435
URL
http://www.mdpi.com/1996-1944/10/4/435
Keywords
2 adsorption ion exchange electronics civil engineering (general)microscopydescriptive and experimental mechanics nuclear engineeringengineering (general) metal-organic frameworkstechnologyelectrical engineering

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