Preparing Nanosilica Particles from Rice Husk Using Precipitation Method

Main Article Content

Rusel Zahraw Farhan
Shahlaa Esmail Ebrahim


Nanosilica was extracted from rice husk, which was locally collected from the Iraqi mill at Al-Mishikhab district in Najaf Governorate, Iraq. The precipitation method was used to prepared Nanosilica powder from rice husk ash, after treating it thermally at 700°C, followed by dissolving the silica in the alkaline solution and getting a sodium silicate solution. Two samples of the final solution were collected to study the effect of filtration on the purity of the sample by X-ray fluorescence spectrometry (XRF). The result shows that the filtered samples have purity above  while the non-filtered sample purity was around  The structure analysis investigated by the X-ray diffraction (XRD), found that the Nanosilica powder has an amorphous structure in nature. Also, it shows a broad peak at (    The particle size distribution was determined by Atomic force microscope (AFM), the results gave that the average diameter equals  and dimension range in , while B.E.T. analysis confirms a high surface area around 618 . FT-IR Spectra experimental data showed the presence of hydrogen-bonded silanol group (Si–O–H) and siloxane group (Si–O–Si) which proved the high purity of Nanosilica particles.


Download data is not yet available.

Article Details

How to Cite
Farhan RZ, Ebrahim SE. Preparing Nanosilica Particles from Rice Husk Using Precipitation Method. Baghdad Sci.J [Internet]. 2021 Sep. 1 [cited 2022 Dec. 4];18(3):0494. Available from:


Şımşek YE. Preparation and characterization of high purity silica obtained from rice husks. Acta Phys Pol A. 2017;132(3):1002–5.

Thuadaij N, Nuntiya A. Preparation of nanosilica powder from rice husk ash by precipitation method. Chiang Mai J Sci. 2008;35(1):206–11.

El-Didamony H, El-Fadaly E, Amer AA, Abazeed IH. Synthesis and characterization of low cost nanosilica from sodium silicate solution and their applications in ceramic engobes. Bol la Soc Esp Ceram y Vidr. 2019;59(1):31–43. Available from:

Barik TK, Sahu B, Swain V. Nanosilica—from medicine to pest control. Parasitol. Res. 2008 Jul 1;103(2):253.

Mirmohamadsadeghi S, Karimi K. Recovery of silica from rice straw and husk [Internet]. Current Developments in Biotechnology and Bioengineering. Elsevier B.V.; 2020. 411–433 p. Available from:

Moosa AA, Saddam F. Synthesis and Characterization of Nanosilica from Rice Husk with Applications to Polymer Composites. Am J Mater Sci [Internet]. 2017;7(6):223–31. Available from:

Asra D, Othman NK, Dasuki Z. Nano-silicate inhibitor derived from rice husk for corrosion mitigation of steel in distilled water. AIP Conf Proc. 2017;1838.

Hassan AF, Abdelghny AM, Elhadidy H, Youssef AM. Synthesis and characterization of high surface area nanosilica from rice husk ash by surfactant-free sol-gel method. J Sol-Gel Sci Technol. 2014;69(3):465–72.

Sinyoung S, Kunchariyakun K, Asavapisit S, MacKenzie KJD. Synthesis of belite cement from nano-silica extracted from two rice husk ashes. J Environ Manage [Internet]. 2017;190:53–60. Available from:

Anh Tuan LN, Kim Dung LT, Thanh Ha LD, Hien NQ, Phu D Van, Du BD. Preparation and characterization of nanosilica from rice husk ash by chemical treatment combined with calcination. Vietnam J Chem. 2017;55(4):455–9.

Ilochonwu CE, Nwajagu CO, Onyenanu IU, Nwonye EI. Effect of temperature in extraction of high purity amorphous silica from rice husk for silicon production. EPD Congr 2015. 2016;219–27.

Jal PK, Sudarshan M, Saha A, Patel S, Mishra BK. Synthesis and characterization of nanosilica prepared by precipitation method. Colloids Surfaces A Physicochem Eng Asp. 2004;240(1–3):173–8.

Nguyen HX, Dao NTT, Nguyen HTT, Le AQT. Nanosilica synthesis from rice husk and application for soaking seeds. IOP Conf Ser Earth Environ Sci. 2019;266(1).

Biswas RK, Khan P, Mukherjee S, Mukhopadhyay AK, Ghosh J, Muraleedharan K. Study of short range structure of amorphous Silica from PDF using Ag radiation in laboratory XRD system, RAMAN and NEXAFS. J Non Cryst Solids [Internet]. 2018;488(February):1–9. Available from:

Lu MM, De Silva DM, Peralta E, Fajardo A, Peralta M. Effects of nanosilica powder from rice hull ash on seed germination of tomato (Lycopersicon esculentum). PeJARD. 2015;5:11-22.

Sabri AA, Abbood NS. Preparation of amino-functionalized mesoporous silica (MCM-41) for Nitrate anion adsorption from aqueous solution. Assoc Arab Univ J Eng Sci. 2019;26(2):28–38.

Premaratne WAPJ, Priyadarshana WMGI, Gunawardena SHP, De Alwis AAP. Synthesis of Nanosilica from Paddy Husk Ash and Their Surface Functionalization. J Sci Univ Kelaniya Sri Lanka. 2013;8(0):33–48.

Setyawan N, Hoerudin, Wulanawati A. Simple extraction of silica nanoparticles from rice husk using technical grade solvent: Effect of volume and concentration. IOP Conf Ser Earth Environ Sci. 2019;309(1).

Akhayere E, Kavaz D, Vaseashta A. Synthesizing nano silica nanoparticles from barley grain waste: Effect of temperature on mechanical properties. Polish J Environ Stud. 2019;28(4):2513–21.