konjes

Konya Journal of Engineering Sciences

2667-8055

Konya Technical University

10.36306/konjes.1260218

Engineering

Mühendislik

FABRICATION OF TERNARY SILICA-CALCIUM-MAGNESIUM AEROGELS: EFFECT OF FEEDING RATE AND MOLAR RATIO ON PROPERTIES

https://orcid.org/0000-0002-8786-579X

Karakuzu İkizler

Burcu

YILDIZ TECHNICAL UNIVERSITY

https://orcid.org/0000-0003-4114-7044

Terzioğlu

Pınar

BURSA TECHNICAL UNIVERSITY

https://orcid.org/0009-0006-5374-9316

Temel Soylu

Tülay Merve

YILDIZ TEKNİK ÜNİVERSİTESİ

https://orcid.org/0000-0002-9495-9321

Yücel

Sevil

YILDIZ TECHNICAL UNIVERSITY

12 01 2023

11 4 905 915 03 06 2023 08 01 2023

2004

Konya Journal of Engineering Sciences

The silica-calcium-magnesium ternary aerogels were prepared by a solvent exchange method and a subsequent ambient pressure drying process. The effect of process parameters such as feeding rate (9-70 mL.min-1) and molar ratio (Si/(Ca:Mg) = 1:1 - 3:1) on the material characteristics including density, elemental content, surface area, pore size, pore volume, and morphology of powders were investigated. Aerogels were characterized by Fourier transform infrared spectroscopy (FTIR), inductively coupled plasma optical emission spectroscopy (ICP-OES), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), Barrett–Joiner–Halenda (BJH) and tapping density analysis. It was found that the molar ratio of Si/(Ca:Mg) could remarkably affect the surface area and density of aerogels, while the feeding rate had slight effect. The resultant aerogels exhibited high specific surface areas. The results showed that the aerogel has a Si/(Ca:3Mg) molar composition obtained with 9 mL.min-1 had the highest surface area (524 m2.g−1). The increase of Ca to Mg molar ratio caused a decrease in the surface area and density of samples. The resultant aerogels are promising candidates as adsorbents to remove various contaminants.

Ambient pressure drying Co-doped silica Pore structure Structural evolution Ternary aerogel

TÜBİTAK 1005

115M469

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