New insights into method development and characterization of amorphous silica from wheat straw

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dc.contributor.authorRamasamy, Sangeetha Piriya
dc.contributor.authorVeeraswamy, Davamani
dc.contributor.authorEttiyagounder, Parameswari
dc.contributor.authorArunachalam, Lakshmanan
dc.contributor.authorDevaraj, Sivakumar Senjeriputhur
dc.contributor.authorKrishna, Kadirvelu
dc.contributor.authorOumabady, Sadish
dc.contributor.authorSakrabani, Ruben
dc.date.accessioned2023-04-06T11:49:21Z
dc.date.available2023-04-06T11:49:21Z
dc.date.issued2023-03-22
dc.description.abstractAmorphous silica, a specialised silicate adsorbent is extensively extracted from agricultural residues for application in various environmental domains. Wheat straws are a rich source of silica that have earlier been overlooked however demand for value addition. The study presents an innovative approach to extracting silica from wheat straw and standardising the extraction process to produce clean product. The sodium silicate solution and the amorphous silica synthesis were obtained by modifying the template mediated sol–gel method. Optimum temperature, concentration and pH were identified for the cleaner production of silica with maximum yield and favourable adsorbent characteristics. The crystallographic properties analysed by the X-Ray Diffraction revealed the amorphous nature of silica extracted from ash at 650 °C for 4 h. The structure of phytolith present in the wheat straw was observed in the form of articulated elongate undulate epidermal phytolith under scanning electron microscopy. The Energy Dispersive X-ray spectrum exhibited higher amount of silica (Si %) of 70.10% with a minimal percentage of potassium (9.96%). The sharp bend at 1025 cm−1 is attributed to the siloxane (Si–O-Si) vibrations in Fourier transform infrared spectroscopic graph of amorphous silica. The specific surface area measurements of amorphous silica showed type II isotherm curve with a hysteresis of H3 type. The optimum conditions derived to produce amorphous silica were 3 M NaOH and 3 M H2SO4 at pH 9.en_UK
dc.identifier.citationRamasamy SP, Veeraswamy D, Ettiyagounder P, et al., (2023) New insights into method development and characterization of amorphous silica from wheat straw, Silicon, Volume 15, Issue 12, August 2023, pp. 5049-5063en_UK
dc.identifier.eissn1876-9918
dc.identifier.issn1876-990X
dc.identifier.urihttps://doi.org/10.1007/s12633-023-02396-5
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/19420
dc.language.isoenen_UK
dc.publisherSpringeren_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectWheat strawen_UK
dc.subjectAmorphous silicaen_UK
dc.subjectPhytolithen_UK
dc.subjectSol gel template methoden_UK
dc.subjectMethod standardizationen_UK
dc.titleNew insights into method development and characterization of amorphous silica from wheat strawen_UK
dc.typeArticleen_UK

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