Photocatalytic oxidation of nitric oxide over AgNPs/TiO2-loaded carbon fiber cloths

Ewelina Kusiak-Nejman; Adam Czyżewski; Agnieszka Wanag; Mateusz Dubicki; Marcin Sadłowski; Rafał J Wróbel; Antoni W Morawski

doi:10.1016/j.jenvman.2020.110343

Photocatalytic oxidation of nitric oxide over AgNPs/TiO₂-loaded carbon fiber cloths

J Environ Manage. 2020 May 15:262:110343. doi: 10.1016/j.jenvman.2020.110343. Epub 2020 Mar 5.

Authors

Ewelina Kusiak-Nejman¹, Adam Czyżewski², Agnieszka Wanag², Mateusz Dubicki², Marcin Sadłowski², Rafał J Wróbel³, Antoni W Morawski²

Affiliations

¹ West Pomeranian University of Technology in Szczecin, Faculty of Chemical Technology and Engineering, Department of Inorganic Chemical Technology and Environment Engineering, Pułaskiego 10, 70-322, Szczecin, Poland. Electronic address: ekusiak@zut.edu.pl.
² West Pomeranian University of Technology in Szczecin, Faculty of Chemical Technology and Engineering, Department of Inorganic Chemical Technology and Environment Engineering, Pułaskiego 10, 70-322, Szczecin, Poland.
³ West Pomeranian University of Technology in Szczecin, Faculty of Chemical Technology and Engineering, Engineering of Catalytic and Sorbent Materials Department, Pułaskiego 10, 70-322, Szczecin, Poland.

PMID: 32250819
DOI: 10.1016/j.jenvman.2020.110343

Abstract

Series of AgNPs/TiO₂-loaded carbon fiber cloth (CFC) composites were prepared by incorporation of pristine TiO₂ and three AgNPs-modified TiO₂ additives onto the surface of four commercial CFCs. AgNPs/TiO₂ photocatalysts were synthesized by the wet impregnation method, including NaBH₄ reduction of silver ions. The silver content in the modified photocatalyst was assessed by inductively coupled plasma optical emission spectrometry (ICP-OES) as well as XRD analysis. It can be indicated that silver was successfully reduced to Ag nanoparticles what was confirmed by UV-Vis/DRS as well as XRD methods. The photocatalytic activity of the AgNPs/TiO₂-loaded CFCs was evaluated during the photocatalytic oxidation (PCO) tests of nitric oxide (NO) acting as a model air contaminant under UV light. It was found that the highest NO removal rate was observed for the AgNPs/TiO₂-loaded CFC material containing 3.70 wt% of AgNPs. Modification of TiO₂ with AgNPs stabilized the photocatalytic efficiency of the composites during 5 as well as 24 consecutive NO photooxidation cycles. It was also concluded that the presence of AgNPs was a key factor responsible for hindering NO₂ formation.

Keywords: Carbon fiber cloths; Nitric oxide photooxidation; Silver nanoparticles; Titanium dioxide.

MeSH terms

Carbon Fiber
Catalysis
Metal Nanoparticles*
Nitric Oxide
Silver*
Titanium

Substances

Carbon Fiber
titanium dioxide
Nitric Oxide
Silver
Titanium