Production and characterization of silica nanoparticles from fly ash: conversion of agro-waste into resource.
Prep Biochem Biotechnol
; 51(1): 86-95, 2021.
Article
em En
| MEDLINE
| ID: mdl-32713293
ABSTRACT
A chemical method to synthesize amorphous silica nanoparticles from the incinerated paddy straw has been introduced. The synthesis was conducted through the hydrolysis by alkaline-acidic treatments. As a result, silica particles produced with the sizes were ranging at 60-90 nm, determined by high-resolution microscopy. The crystallinity was confirmed by surface area electron diffraction. Apart from that, chemical and diffraction analyses for both rice straw ash and synthesized silica nanoparticles were conducted by X-ray diffraction and Fourier-transform infrared spectroscopy. The percentage of silica from the incinerated straw was calculated to be 28.3. The prominent surface chemical bonding on the generated silica nanoparticles was with Si-O-Si, stretch of Si-O and symmetric Si-O bonds at peaks of 1090, 471, and 780 cm-1, respectively. To confirm the impurities of the elements in the produced silica, were analyzed using X-ray photoelectron spectroscopy and energy dispersive X-ray spectroscopy. The stability of silica nanoparticles was investigated using thermogravimetric analysis and zeta potential. The measured size from zeta potential analysis was 411.3-493 nm and the stability of mass reduction was located at 200 °C with final amount of mass reduced â¼88% and an average polydispersity Index was 0.195-0.224.
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Base de dados:
MEDLINE
Assunto principal:
Oryza
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Resíduos
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Incineração
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Dióxido de Silício
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Caules de Planta
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Poluentes Ambientais
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Nanopartículas
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Cinza de Carvão
País como assunto:
Asia
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article