An alternative and simple method for the preparation of bare silica nanoparticles using sugarcane waste ash, an abundant and despised residue in the Brazilian industry
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Journal of the Brazilian Chemical Society
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Sugarcane waste ash, a Si-rich waste product, is generated in large quantities and creates a
serious disposal problem in the Brazilian ethanol-sugar industry, affecting the environment and
public health. Here, a simple method capable of generating bare silica nanoparticles utilizing
this residue is demonstrated. Firstly, the crystalline silica present in sugarcane waste ash (SWA)
was converted into amorphous by melting a mixture of sodium hydroxide and SWA at 550 °C
for 1 h. The silica nanoparticles (SiO2NPs) were formed by lowing pH. This production process
of SiO2NPs from SWA was optimized varying the ash:NaOH mass ratio, increasing the silica
extraction up to 96%. The sample’s composition was characterized by total X-ray fluorescence
spectroscopy, morphology and physical-chemical properties were investigated by scanning electron
microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction, specific surface
area measurements, Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric
analyses (TGA), followed by use as adsorbent for the removal of methylene blue dye. With this
process of extraction, nanoparticles smaller than 100 nm were generated, with a surface area of
63 m2 g-1 and a maximum adsorption capacity of 37 mg g-1 for methylene blue. The results indicate
a successful process for obtaining an adsorbent from an industrial waste product using a cost
effective and rapid synthesis procedure rendering renewable product.
Como referenciar
ROVANI, SUZIMARA; SANTOS, JONNATAN J.; CORIO, PAOLA; FUNGARO, DENISE A. An alternative and simple method for the preparation of bare silica nanoparticles using sugarcane waste ash, an abundant and despised residue in the Brazilian industry. Journal of the Brazilian Chemical Society, v. 30, n. 7, p. 1524-1533, 2019. DOI: 10.21577/0103-5053.20190049. Disponível em: http://repositorio.ipen.br/handle/123456789/30374. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.