Eco-friendly Synthesis and Characterization of Amorphous Nanosilica from Rice Husk Pradeepkumar S.1, Yassin M. Mohamed1,*, Marimuthu S.2, Kalarani M.K.3, Thiyageshwari S.4, Gurumeenakshi G.5 1Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India 2Centre for Agricultural Nanotechnology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India 3Directorate of Crop Management, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India 4Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India 5Department of Food Science and Nutrition, Community Science College and Research Institute, Tamil Nadu Agricultural University, Madurai-625 104, Tamil Nadu, India *Corresponding Author: M. Mohamed Yassin, Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India, Email: mmyassin@gmail.com
Online Published on 05 January, 2024. Abstract Background A significant amount of rice production waste is rice husk. It is not humifiable and turns into a significant environmental pollutant if not properly utilized. Rice husk contains silica nanoparticles, which is a major inorganic component. High purity amorphous silica nanoparticles can thus be produced using simple thermo-chemical procedures without polluting the environment by cutting out the release of carbon dioxide during the process. Methods A study was carried out to extract amorphous silica nanoparticles from rice husk ash using an environmentally benign chemical process. Utilising a variety of material characterization techniques viz., X-ray diffraction (XRD), fourier-transform infrared spectroscopy (FT-IR), field emission scanning electron microscope (FESEM), energy dispersive X-ray spectroscopy (EDS) and Particle size analyser (PSA), the extracted nanoparticles properties were confirmed. Result The amorphous behaviour of the silica sample was confirmed using transmission electron microscopy-selected area electron diffraction patterns and X-ray diffraction analyses, whilst siloxane and silanol groups were primarily discovered using Fourier-transform infrared spectroscopy. Images obtained using scanning electron and transmission electron microscopy showed initial nanoparticles to be present along with secondary microparticles, possibly as a result of their agglomeration. The extracted amorphous silica has particles with an average diameter of 35 nm. This synthesized silica nanoparticles can be used in agriculture, nano-additives, microelectronics, sensors and in other fields. Top Keywords Characterization, Environment, Nanosilica particles, Rice husk. Top |