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Characterisation of silica derived from rice husk (Muar, Johor, Malaysia) decomposition at different temperatures

Ismail, N. A. A. and Azmi, Mohd Azham and M, Rizamarhaiza and A. A. K., W. M. Hasif and Taib, Hariati (2016) Characterisation of silica derived from rice husk (Muar, Johor, Malaysia) decomposition at different temperatures. In: The 2nd International Conference on Functional Materials and Metallurgy.

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Abstract

Rice husk was thermally decomposed to yield powder composed of silica (SiO2). Temperatures of 700°C and 1000°C were chosen as the decomposition temperatures. X-Ray Diffraction (XRD), X-Ray Florescence (XRF), Fourier Transform Infrared (FTIR), and Field Emission Scanning Electron Microscope (FESEM) analyses were conducted on a synthetic silica powder (SS-SiO2) and the rice husk ash as for the comparative characterisation study. XRD analyses clearly indicated that the decomposed rice husk yielded silica of different nature which are Crystalline Rice Husk Silica (C-RHSiO2) and Amorphous Rice Husk Silica (A-RHSiO2). Moreover, it was found that SS-SiO2 was of Quartz phase, C-RHSiO2 was of Trydimite and Cristobalite. Through XRF detection, the highest SiO2 purity was detected in SS-SiO2 followed by C-RHSiO2 and A-RHSiO2 with purity percentages of 99.60%, 82.30% and 86.30% respectively. FTIR results clearly indicated silica (SiO2) bonding 1056, 1064, 1047, 777, 790 and 798 cm−1) increased as the crystallinity silica increased. The Cristobalite phase was detected in C-RH SiO2 at the wavelength of 620 cm−1. Morphological features as observed by FESEM analyses confirmed that, SS-SiO2 and C-RH SiO2 showed prominent coarse granular morphology.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Rice husk; crystalline silica; amorphous silica; x-ray diffraction; x-ray florescence; morphology
Subjects: T Technology > T Technology (General)
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Materials Engineering and Design
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 13 Aug 2018 03:26
Last Modified: 13 Aug 2018 03:26
URI: http://eprints.uthm.edu.my/id/eprint/8368
Statistic Details: View Download Statistic

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