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

Author(s)

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

• Document type: Journal article
• Source: SURFACE AND INTERFACE ANALYSIS; v. 52, n. 11, p. 7-pg., 2020-07-12.

Abstract

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)

• FAPESP's process: 16/14165-0 - Meso/macroporous ceramics for catalytic conversion of lignocellulosic biomass into chemicals of industrial interest
• Grantee: Maria José Fonseca Costa
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
• Grantee: Edgar Dutra Zanotto
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC