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Nanoscale Biosilica from Bioresidue of Ragi Straw

P.Bhuvaneswari, K.Amutha, M.Shankar

The concept of no waste is termed as new resource through new material for value addition. By recycling process the waste material of bioresidues are utilized to prepare synthesized product. One of the bioresidue of ragi straw was burned under controlled temperature and the ash was treated to synthesize biosilica. Using sol-gel route and chemical coprecipitate method the biosilica were produced in nanolevel. The functional groups and phase identification of ragi straw ash (RSA) and Biosilica (BS) were carried out through Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD) analysis. The structural and morphological evaluation by Scanning Electron Microscopy-Energy dispersive Spectroscopy (SEM-EDS) which confirms the nanosize and spherical shape of biosilica. By the recycling process, a stage of the ecological and economic benefits in the disposal of residues was reached and achieved as zero waste to environment.