Journal
BIOMASS & BIOENERGY
Volume 159, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biombioe.2022.106424
Keywords
Silica-based composite aerogel; Rice husk ash; Sodium alginate; Freeze drying; Absorption
Funding
- China National Funds for Distinguished Young Scientists [51725603]
- Thailand Science Research and Innovation (TSRI) Global Partnership Funds Program [B16F630087]
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In this study, sodium alginate-silica (SAS) composite aerogels with excellent absorption capacity were synthesized from rice husk ash. The SAS aerogels showed high specific surface area, pore volume, and organic-solvent absorption capacity, making them promising candidates for organic-pollutant absorption.
Sodium alginate-silica (SAS) composite aerogels with excellent absorption capacity were synthesized from rice husk ash through a sol-gel process and freeze drying. The physical and chemical properties of the SAS aerogels were fully characterized using field emission scanning electron microscopy, N-2 adsorption-desorption isotherms, thermogravimetric analysis, Fourier transform infrared spectroscopy, and other techniques. The silica-based composite aerogel containing 18% sodium alginate (18-SAS) had the largest specific surface area of 205.1 m(2) g(-1), the highest pore volume of 0.953 cm(3) g(-1), and the maximum organic-solvent absorption capacity of 6-14 g g(-1). Such an environmentally friendly, low-cost aerogel material with excellent performance is a promising candidate for organic-pollutant absorption.
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