In the present work, we have investigated the role of UV-irradiation on the structural and functional properties of Fe-ZSM-5 and Fe-silica by spectroscopic and experimental analysis. The UV-irradiated Fe-ZSM-5 showed structural and chemical variations due to the cleaving of framework bonds which in turn decreased the crystallinity of Fe-ZSM-5. For Fe-silica, increased hydroxyl density, silica-network reconfiguration, and change in the Fe coordination were predicted by spectroscopic techniques. These structural and functional changes significantly contributed towards the adsorption of benzene, toluene, ethylbenzene, and xylene (BTEX) via diffusion and hydrogen bonding. At the same time, these adsorbents behaved as an efficient catalyst and showed remarkable photo-oxidation of adsorbed BTEX. As large as 80% of increment in the BTEX removal performances were recorded after UV-pretreatment for Fe-silica. Both the adsorbents were found effective for more than 10 cycles proving their economic application for pollutant removal from indoor air.

Structural and functional modifications in Fe-incorporated ZSM-5 and silica under the effect of UV-irradiation

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.