Enhanced Photocatalytic Properties of PET Filaments Coated with Ag-N Co-Doped TiO2 Nanoparticles Sensitized with Disperse Blue Dyes

Abstract

In this study, the effects of disperse blue dye-sensitization on the photocatalytic properties of the Ag-N co-doped TiO2 nanoparticles loaded on polyethylene terephthalate (PET) filaments are investigated under visible light irradiation. The microstructure and photocatalytic properties of the as-synthesized TiO2 nanocomposites, as well as the as-prepared PET filaments, are systematically characterized. The photocatalytic performance of the PET filaments coated with the Ag-N co-doped TiO2 nanoparticles sensitized with disperse blue dyes is evaluated via its capacity of photo-degrading methyl orange (MO) dyes under visible light irradiation. It is found that the holes are the predominant reactive radical species and the hydroxyl and superoxide radicals play a subordinate role in the photocatalytic reaction process. The reaction rate constant of the photocatalytic composite filaments is nearly 4.0 times higher than that of the PET filaments loaded solely with TiO2 nanoparticles. The resultant photocatalytic composite filaments are evident to be capable of repeatedly photo-degrading MO dyes without losing its photocatalytic activity significantly.

Silver Nanoparticles Functionalized by Fluorescein Isothiocyanate or Rhodamine B Isothiocyanate: Fluorescent and Plasmonic Materials

“…The interaction of organic molecules with metal nanoparticles (NPs) is of central importance for a large number of applications in several fields, such as chemical and biological sensing [1][2][3][4], optics [5][6][7], energy [8][9][10][11], catalysis [12][13][14][15], and nanomedicine [16][17][18][19]. Many of these applications are based on the effect of the localized surface plasmon resonance (LSPR) on the absorption, emission, and scattering of molecules attached to or in close vicinity to the NP surface [20][21][22][23].…”

Hydrophobic cellulose-based and non-woven fabrics coated with mesoporous TiO2 and their virucidal properties under indoor light

“…3 and Figure S3) also showed cutting wavelengths for samples TiO 2 -S1, TiO 2 -S2, TiO 2 -S1-cotton, TiO 2 -S2-cotton, TiO 2 -S1-NWF and TiO 2 -S2- NWF equal to 380, 377, 368, 357, 401 and 402 nm, respectively. This different values indicated that the absorption of TiO 2 varied when this was impregnated in the fabrics due to the interaction between the particles and the substrate ( Kisch & Weiß, 2002 ; Tan et al., 2013 ; Zhang et al., 2020 ). Moreover, all DRS curves of the impregnated fabrics showed a slight tail wavelength larger than 400 nm, which was attributed to the presence of defects or surface impurities over the less crystallized TiO 2 nanoparticles ( Jiang, Long, Wu & Cai, 2011 ).…”

TiO2 Co-doped with Zr and Ag shows highly efficient visible light photocatalytic behavior suitable for treatment of polluted water

“…According to lattice fringe images, these periodic arrangements match with lattice spacing of (101) plane of anatase (TiO 2 ) phase and are consistent with XRD analysis. 50,51 UV-vis spectroscopy was employed to analyze interactions of nanoparticles with photon energies. Absorbance spectra of pure titania and ZA (2, 4, 6 and 8 wt%) doped TiO 2 nanomaterials are illustrated in Fig.…”

“…[11][12][13][14] Currently, some researchers undertook co-doping of titania to enhance photoactivity behavior. 15,16 These studies suggested that improved photoactivity of observed products could be due to a synergetic effect between incorporated metal ions. These research reports revealed that TiO 2 modication via co-doping may prove to be an effective technique to enhance photocatalytic activity.…”