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Effect of Different Hydrothermal Temperatures on the Properties on Nano-Silica (SiO2) of Rice Husk

1Department of Physics, Faculty of Mathematics and Natural Sciences, IPB University, Bogor, 16680, Indonesia

2Department of Food Technology and Nutrition, Faculty of Halal Food Science, Djuanda University, Bogor, 16720, Indonesia

Received: 4 Jan 2022; Revised: 15 Mar 2022; Accepted: 6 Apr 2022; Available online: 18 Apr 2022; Published: 4 Aug 2022.
Editor(s): Peter Nai Yuh Yek
Open Access Copyright (c) 2022 The Authors. Published by Centre of Biomass and Renewable Energy (CBIORE)
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Rice husk has high silica (SiO2) content and can be used as the primary material for making nano-silica. One of the methods for synthesizing nano-silica was the hydrothermal method. The objective of this study was to synthesize nano-silica from rice husks by observing the effect of temperature in the hydrothermal process on the structure, electrical and particle properties of nano-silica. The hydrothermal process temperature was 150, 200, and 250 °C for 4 hours. The results showed that all nano-silicas were in the amorphous phase. The particle size was in the range of 0.16-13.49 nm with more uniform size distribution on nano-silicas of 200 °C and 250 °C than nano-silica at 150 °C. These three nano-silicas were included in the semiconductor category by increasing temperature and frequency. In addition, these treatment variations resulted 200 °C for 4 hours and pressure of 2 atm as the optimum treatment for manufacturing nano-silica of rice husk ash. This nano-silica could be used as semiconductor material for electronic industry.

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Keywords: Amorphous; hydrothermal; semiconductor; rice husk; nano-silica size

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