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Gas‐phase removal of indoor volatile organic compounds and airborne microorganisms over mono‐ and bimetal‐modified (Pt, Cu, Ag) titanium(IV) oxide nanocomposites
Author(s) -
Wysocka Izabela,
MarkowskaSzczupak Agata,
Szweda Piotr,
Ryl Jacek,
EndoKimura Maya,
Kowalska Ewa,
Nowaczyk Grzegorz,
ZielińskaJurek Anna
Publication year - 2019
Publication title -
indoor air
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.387
H-Index - 99
eISSN - 1600-0668
pISSN - 0905-6947
DOI - 10.1111/ina.12595
Subject(s) - bimetal , photocatalysis , bimetallic strip , materials science , titanium , oxide , titanium oxide , x ray photoelectron spectroscopy , quenching (fluorescence) , nanocomposite , nuclear chemistry , chemical engineering , chemistry , catalysis , metallurgy , nanotechnology , metal , fluorescence , organic chemistry , physics , quantum mechanics , engineering
The photocatalytic deactivation of volatile organic compounds and mold fungi using TiO 2 modified with mono‐ and bimetallic (Pt, Cu, Ag) particles is reported in this study. The mono‐ and bimetal‐modified (Pt, Cu, Ag) titanium(IV) oxide photocatalysts were prepared by chemical reduction method and characterized using XRD, XPS, DR/UV‐Vis, BET, and TEM analysis. The effect of incident light, type and content of mono‐ and bimetallic nanoparticles deposited on titanium(IV) oxide was studied. Photocatalytic activity of as‐prepared nanocomposites was examined in the gas phase using LEDs array. High photocatalytic activity of Ag/Pt‐TiO 2 and Cu/Pt‐TiO 2 in the reaction of toluene degradation resulted from improved efficiency of interfacial charge transfer process, which was consistent with the fluorescence quenching effect revealed by photoluminescence (PL) emission spectra. The photocatalytic deactivation of Penicillium chrysogenum, a pathogenic fungi present in the indoor environment, especially in a damp or water‐damaged building using mono‐ and bimetal‐modified (Pt, Cu, Ag) titanium(IV) oxide was evaluated for the first time. TiO 2 modified with mono‐ and bimetallic NPs of Ag/Pt, Cu, and Ag deposited on TiO 2 exhibited improved fungicidal activity under LEDs illumination than pure TiO 2 .