Synthesis of hybrid mesoporous spheres using the chitosan as template |
| |
Authors: | Tiago Pinheiro Braga Elis Cristina Chagas Gomes Adriano Freitas de Sousa Neftali Lenin Villarreal Carreño Elisane Longhinotti Antoninho Valentini |
| |
Affiliation: | 1. Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, CP 6021, Campus do Pici, 60455-970 Fortaleza CE, Brazil;2. Instituto de Química e Geociências, DQAI, Universidade Federal de Pelotas, CP-354, CEP-96010–900, Capão Leão, RS, Brazil |
| |
Abstract: | Hybrid mesoporous spheres of Al and Si oxides were synthesized for the mixture of organic material (chitosan) with inorganic material (aluminum and silicon hydroxide). It was observed that chitosan with larger polymerization degree, resulted in a larger mechanical resistance of the spheres. The oxides were characterized by the following: Fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), differential scanning calorimetry (DSC), as well as, thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and adsorption isotherms of N2 (BET). Highly uniform oxide sphere diameters were obtained (average of 1.0 mm). The results of the adsorption isotherms indicated that the material is mesoporous. The surface area of the materials ranged between 620 and 245 m2/g, and the pore volume varied between 0.82 and 0.28 cm3/g, depending on the molar ratio of the organic and inorganic materials. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|