Production and Characterization of Amorphous Silica Nanoparticles from Coconut Shell and Coir
DOI:
https://doi.org/10.63747/jeis.v1i2.49Keywords:
coconut coir, coconut shell, agricultural wastes, silica, sol-gelAbstract
Silica has been produced from coconut coir and coconut shell due to the economic importance of coconut in India and thus generates a lot of wastes. The wastes are generated and disposed indiscriminately while several are utilized for energy sources. The ash produced by burning them is usually discarded with a huge amount of extractable silica present. Extraction of this silica was therefore done using environmentally friendly sol-gel approach to produce silica that could be used in several applications. The wastes were calcined at 700 oC in a muffle furnace to get ash, treated with HCl to remove soluble metallic oxides and thereafter sol-gelled to obtain silica gel. The gel was then dried at 65 oC for 24 hours and then characterized using SEM, EDX, FT-IR and XRD. Silica produced is amorphous and the particles are in nanosize range but with a high level of agglomeration. The silica could be deployed for silicon nanoparticles production at lower cost.
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