The Effect of Co-Surfactant Charge on the Structure Properties of Prepared Nano SBA-15 Using Sodium Silicate. Tikrit Journal of Engineering Sciences, [S. l.], v. 32, n. 4, p. 1–10, 2025. DOI: 10.25130/tjes.32.4.4. Disponível em: https://tj-es.com/ojs/index.php/tjes/article/view/2108.. Acesso em: 9 sep. 2026.