Surface Modification of nTiO₂/Ag Hybrid Nanoparticles Using Microwave-Assisted Polymerization in the Presence of Bis(2-hydroxyethyl) Terephthalate

Abstract

Titanium dioxide doped silver (nTiO 2 /Ag) nanoparticles were surface-modified by microwave-assisted polymerization of 2-bis-(hydroxyethyl) terephthalate (BHET). The modified and unmodified nanoparticles were analyzed by FTIR, XRD, TGA, and TEM. A thin layer of grafted PET on the surface of the nanoparticles was observed and quantified by TGA giving a value of 40 wt-%. XRD and electron diffraction analyses showed traces of AgO 2 after the modification. The bactericide activity of modified and unmodified nanoparticles was evaluated; the presence of the thin layer of grafted-PET on the nTiO 2 /Ag did not change significantly the bactericide activity, showing an excellent performance similar to unmodified nanoparticles.

Antimicrobial Properties of Polyester/Copper Nanocomposites by Melt-Spinning and Melt-Blowing Techniques

“…During the synthesis of PET and hybrids of PET-Ag/TiO 2 nanoparticles, degradation was observed in a single step and within the same temperature range for the pure polymer; meanwhile, the nanocomposite exhibited several weight loss events. The first occurring at a temperature of 253 • C equivalent to 9% by weight, and subsequently at 420 • C a loss of 84% by weight was observed and this is attributed to the thermal decomposition of PET derived from the byproducts present after the synthesis [35]. On the other hand, adding OMMT and/or SiO 2 at 0.5, 1, and 2% (w/w) in PET promotes a single degradation event in the same temperature interval as our sample [36].…”

P‐doped TiO2 Nanofibers Decorated with Ag Nanoparticles for Enhanced Photocatalytic Activity under Simulated Solar Light

“…However, there were no additional peaks in the FTIR spectrum of Ag-PTNFs which suggest that silver exists as Ag 0 . [36] The successful doping of P followed by Ag deposition on TNFs and surface chemical states of these elements were further investigated by XPS. The survey spectrum of TNFs, PTNFs and Ag-PTNFs are compared in Figure 2a, where Ag-PTNF showed two extra peaks that are assigned to Ag 3d and P 2p suggesting the successful incorporation of Ag and P in TNFs.…”

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

“…However, Ag doped TiO 2 nanocomposites are unstable in the photocatalytic processes due to the oxidation of Ag owning plasmonic holes, leading to the deactivation of catalysts [18]. To improve the photocatalytic efficiency and durability of Ag doped TiO 2 photocatalysts, nonmetal elements were incorporated into the Ag doped TiO 2 by utilizing the synergistic effect between doped metal and nonmetal elements [19].…”