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Title: Use of rice husk ash as only source of silica in the formation of mesoporous materials
Authors: Schwanke, A. J.
Melo, D. M. A.
Silva, A. O.
Pergher, Sibele Berenice Castellã
Keywords: MCM-41;Rice husk ash;Mesoporous materials
Issue Date: 2013
Publisher: Associação Brasileira de Cerâmica
Citation: SCHWANKE, A. J.; MELO, D. M. A.; SILVA, A. O.; PERGHER, S. B. C. Use of rice husk ash as only source of silica in the formation of mesoporous materials. Cerâmica, [s.l.], v. 59, n. 349, p. 181-185, 2013. ISSN 0366-6913. Disponível em: Acesso em: 19 maio 2020.
Portuguese Abstract: This paper reports the synthesis of molecular sieves similar to MCM-41 using rice husk ash as only source of silica. For comparison purposes, a standard synthesis was performed using aerosil 200 commercial silica. The rice husk silica was obtained by heating treatment at 600 ºC and leaching for 2 h in reflux with HCl 1mol.L-1 and used in the synthesis. The samples prepared were characterized by N2 adsorption, X-ray diffraction (XRD), scanning electronic microscopy (SEM) and thermogravimetric analysis (TG). By type-IV adsorption isotherms, the formation of mesoporous materials was observed. XRD showed the formation of hexagonal unidirectional pore materials similar to MCM-41. By SEM, it could be observed that the rice husk has fibrous aspect and that synthesis using calcined and leached rice husk did not react entirely because silica was only partially dissolved
ISSN: 0366-6913
Appears in Collections:IQ - Artigos publicados em periódicos

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