Synthesis of Nb/MCM-48 material using rice husk ash as silica source with different SI/NB molar ratios. Revista Perspectiva, [S. l.], v. 45, n. 171, p. 85–95, 2021. DOI: 10.31512/persp.v.45.n.171.2021.159.p.85-95. Disponível em: https://ojs.uricer.edu.br/index.php/perspectiva/article/view/159. Acesso em: 14 out. 2025.