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Journal of Chemistry
Volume 2017 (2017), Article ID 6129035, 9 pages
Research Article

Green Synthesis and Characterization of Biosilica Produced from Sugarcane Waste Ash

1Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP), Av. Prof. Lineu Prestes, No. 2242, Cidade Universitária, 05508-000 São Paulo, SP, Brazil
2Faculdades Oswaldo Cruz, Rua Brigadeiro Galvão, 540 Barra Funda, 01151-000 São Paulo, SP, Brazil

Correspondence should be addressed to Denise Alves Fungaro

Received 13 February 2017; Revised 4 April 2017; Accepted 26 April 2017; Published 21 May 2017

Academic Editor: Barbara Gawdzik

Copyright © 2017 Rodrigo Heleno Alves et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In this study, ash from sugarcane waste was used in the synthesis of biosilica using alkaline extraction followed by acid precipitation. Different parameters that could influence the silica particle synthesis were evaluated. The ash and synthesized biosilica were characterized by a combination of spectroscopic and chemical techniques such as XRD, XRF, SEM, particle size analyser, N2 adsorption analysis, TGA, and FTIR. The best condition for biosilica production was achieved with fusion method and aging temperature of 80°C for 1 h during gel formation. X-ray powder diffraction pattern confirms the amorphous nature of synthesized silica. The purity of the prepared silica was 99% silica which was confirmed by means of XRF. The experimental data suggest that the sugarcane waste ash could be converted into a value-added product, minimizing the environmental impact of disposal problems.