Preparation of nano-silica powder from silica sand via sol-precipitation method

Mohd Daud, Farah Diana and Johari, Muhammad Hilmi and Ahmad Jamal, Afiq Haikal and Kahlib, Nor Amyra Zulianey and Hairin, Assayidatul Laila Nor (2019) Preparation of nano-silica powder from silica sand via sol-precipitation method. In: "International Conference on X-Rays and Related Techniques in Research and Industry 2018, ICXRI 2018", 18 - 19 August 2018, Grand Riverview Hotel, Kota Bharu, Kelantan.

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Abstract

t. Silica in the nanoscale has interesting properties compared to its bulk counterpart that leads to a different range of applications. This is due to its low toxicity, high physical and chemical stability, large surface area to volume ratio and direct surface chemistry that allows to be combined or functionalized with a variety of functional species or molecules. Most researches used metal alkoxides or agricultural materials for the source of silica but very few researches attempted at preparing nano-silica powder from silica sand via the chemical method. In this research, the nano-silica powder is prepared via sol-precipitation method and its subsequent characterization. The materials used for this project were silica sand, sodium hydroxide, hydrochloric acid and distilled water. Surface morphology using Field Emission Scanning Electron Microscope (FESEM) of the silica sand was found to be irregular in terms of its size and shape. The average particle size of the silica sand determined by FESEM was found to be around 230 µm. The nano-silica has quartz SiO2 structures as demonstrated from XRD analysis. The synthesized nano-silica particle have a huge reduction in terms of size between 58 nm to 290 nm using FESEM. It was also found that the nano-silica particles were very agglomerated and had a spherical or globular particle shape. Hence, the silica sand can be an alternative precursor for synthesis of nano-silica particle by the solprecipitation method instead of using other chemical precursor.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	7338/73182
Uncontrolled Keywords:	Preparation of nano-silica powder; Silica sand via SolPrecipitation
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction T Technology > TP Chemical technology > TP200 Manufacture and use of chemicals
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	DR FARAH DIANA MOHD DAUD
Date Deposited:	09 Jul 2019 16:35
Last Modified:	18 Jul 2019 15:45
URI:	http://irep.iium.edu.my/id/eprint/73182

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