1Material Science Research Laboratory, Department of Physics, Annamalai University.
2Centralised Instrumentation and Service Laboratory (CISL), Department of Physics, Annamalai University, Annamalai nagar, 608 002, Tamilnadu, India.
An extract of nanosilica from rice husk, an agriculture waste is used to produce nanosilica when rice husk ash is burnt in a muffle furnace at 650°C for 4 hrs amorphous silica is obtained. Pure silica is extracted by titration method using 5N H2SO4 solution with constant stirring at controlled temperature. By refluxing method 98% of pure nanosilica can be extracted from pure silica. SEM results show the particles are in agglomeration form and the dimension is 80 mm. XRD powder pattern of nanosilica confirms the amorphous nature of the substance. An FTIR spectrum adds evidence indicating the presence of nanosilica.
Nanosilica, Rice husk ash, XRD, SEM, FTIR
