Machado WA, Alves H de O, Machado AE da H. Synthesis and Evaluation of the Photocatalytic Activity of Nanostructured Composites Based on SiO2 Recovered by TiO2. Orbital: Electron. J. Chem. 2019;11(2):83-90. Accessed January 30, 2026. https://periodicos.ufms.br/index.php/orbital/article/view/15992