Dr. Valdes-Morales, Hector

Thumbnail Image
Nombre de publicaciĂ³n
Dr. Valdes-Morales, Hector
Nombre completo
Valdes Morales, Hector
Facultad
Email
hvaldes@ucsc.cl
ORCID

Filters

20201
Reset filters

Settings

Author: Azzolina-Jury, Federico Ă— Subject: Ozone Ă—

Research Outputs

Now showing 1 - 1 of 1
  • No Thumbnail Available
    Publication
    New insight of the influence of acidic surface sites of zeolite on the ability to remove gaseous ozone using operando DRIFTS studies
    (Microporous and Mesoporous Materials, 2020)
    Valdes-Morales, Hector 
    ;
    Ulloa, Francisco J.
    ;
    Solar, VĂ­ctor A.
    ;
    Cepeda, Manuel S.
    ;
    Azzolina-Jury, Federico
    ;
    Thibault-Starzyk, Frédéric
    Recently, natural zeolites have started to be used as alternative materials for ozone abatement from working environments. In this study, a surface response methodology based on a D-Optimal design is applied to develop a transition-metal-modified natural zeolite that increases ozone removal efficiency. Ozone adsorption and/or decomposition onto natural and cobalt modified natural zeolite were studied by diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Results evidenced that ozone is adsorbed and decomposed at strong Lewis acidic sites, whereas ozone adsorption products interact with surface OH groups. Additionally, DRIFTS studies indicate that nitrous species are adsorbed at acidic sites, reducing the capacity to decompose ozone when ozone is generated from air.