Effects of different parameters on the synthesis of silica aerogel microspheres in supercritical CO2 and their potential use as an adsorbent

Synthesis of metal oxide microspheres in supercritical carbon dioxide (SCO 2 ) is very attractive for a wide range of applications such as catalysis, controlled release, and separation science due to their identical properties. The aim of this study is the synthesis of silica microspheres (SM) in SC...

Full description

Saved in:
Bibliographic Details
Published in:Journal of sol-gel science and technology 2019-02, Vol.89 (2), p.458-472
Main Authors: Başaran, Ersin, Alp Arıcı, Tuğba, Özcan, Adnan, Gök, Özer, Özcan, A. Safa
Format: Article
Language:English
Subjects:
Adsorbents
Aerogels
Aqueous solutions
Carbon dioxide
Carbon monoxide
Catalysis
Ceramics
Chemistry and Materials Science
Composites
Controlled release
cryogels
etc.
Field emission microscopy
Flow velocity
Fourier transforms
Glass
Heavy metals
Infrared spectroscopy
Inorganic Chemistry
Lead
Light diffraction
Materials Science
Microspheres
Nanotechnology
Natural Materials
Optical and Electronic Materials
Original Paper: Nano- and macroporous materials (aerogels
Photon correlation spectroscopy
Pressure effects
Scanning electron microscopy
Silicon dioxide
Sol-gel processes
Synthesis
Temperature effects
X-ray diffraction
xerogels
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Synthesis of metal oxide microspheres in supercritical carbon dioxide (SCO 2 ) is very attractive for a wide range of applications such as catalysis, controlled release, and separation science due to their identical properties. The aim of this study is the synthesis of silica microspheres (SM) in SCO 2 by sol–gel method. The effects of temperature, pressure, flow rate, time, co-solvent and its ratio on the synthesis of silica microspheres in SCO 2 were investigated. The synthesized microspheres were characterized by several techniques including field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), dynamic light scattering (DLS), and surface area analysis. The results indicated that the optimum condition for the synthesis of SM was determined at 150 bar, 80 °C, and 2.5 mL min −1 of SCO 2 flow rate. The usability of SM as an adsorbent for the removal of dyes and heavy metals from aqueous solutions was also examined. Kinetic and isotherm studies for the adsorption of Pb(II) ions and Acid Blue 260 (AB260) onto SM were carried out.
ISSN:0928-0707
1573-4846
DOI:10.1007/s10971-018-4885-6