Study of secondary porosity by SAXS and N₂ adsorption in composite materials obtained from a Cuban natural clinoptilolite

Autor(es)

Andrade-Ferreira, Andre ; Costa-Marrero, Yailen ; Autie-Castro, Giselle ; Farias, Tania ; Duque-Rodriguez, Julio ; Fonseca-Costa, Maria Jose ; Ellena, Javier ; Primerano-Mascarenhas, Yvonne

• Tipo de documento: Artigo Científico
• Fonte: SURFACE AND INTERFACE ANALYSIS; v. 52, n. 11, p. 7-pg., 2020-07-12.

Resumo

In this work, a study of the secondary porosity of two zeolite-based composites is carried out by small angle X-ray scattering (SAXS) and N(2)adsorption at 77 K. The composites were obtained by the inclusion of ZnO nanoparticles in a Cuban natural clinoptilolite by mechanosynthesis and 'in situ' methods. It was observed a decrease in the specific surface area as a result of ZnO nanoparticles inclusion from 149 m(2)g(-1)in the started material to 60 m(2)g(-1)in the composite prepared by in situ method, whereas the mesopore diameter remained almost constant. The results confirmed the presence of mesopores with diameter between 3 and 36 nm, with good match by both methodologies. These materials were developed in view of their future application as catalysts and adsorbents, where the presence of secondary porosity is key to favor the diffusion processes. (AU)

• Processo FAPESP: 16/14165-0 - Cerâmicas meso/macroporosas para conversão catalítica de biomassa lignocelulósica em produtos químicos de interesse industrial
• Beneficiário: Maria José Fonseca Costa
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs