Tuning the size and the photocatalytic performance of gold nanoparticles in situ generated in photopolymerizable glycomonomers

Abstract

Polymer nanocomposites containing Au NPs in situ photogenerated during the UV-curing process were prepared starting from methacrylated glycomonomers with α-d-glucofuranose or d-mannitol structural units, other mono(di)methacrylates and AuCl3.

Photocatalysis applications of some hybrid polymeric composites incorporating TiO2 nanoparticles and their combinations with SiO2/Fe2O3

“…In a manner analogous to [ 59 ], the photocatalytic activity of the synthesized hybrid films was evaluated following the degradation of phenol, hydroquinone or dopamine in aqueous solutions under ambient conditions and UV–visible irradiation. A piece of each composite film (1 g) was added into 50 mL of phenol (1.06 × 10 −3 M) or hydroquinone/dopamine (0.5 × 10 −3 M) aqueous solutions.…”

Polymer Nanocomposites for Photocatalytic Applications

“…The photodegradation parameters for o-nitro-phenol decomposition are similar to those determined for phenol. This study underlined that, even in the absence of the crystalline TiO 2 phase, but in appropriate combination with other conducting elements (SiO 2 phase and Ag/Au NPs), the proposed materials acted as good catalyst capable to eliminate phenol derivatives from the system nearly completely after 350 min of UV irradiation [53].…”

“…Polymer nanocomposite films prepared by in situ photogeneration of gold nanoparticles in tandem with the photopolymerization process of methacrylated glycomonomers with d-glucofuranose or D-mannitol structural units that were reported by our group [53]. The nanocomposites were synthesized by a simple, efficient, cheap, and eco-friendly method that allow the achieving of flexible free-standing films active in the photocatalytic degradation of MB and MO dyes in aqueous phase under visible light irradiation at ambient temperature.…”

“…Our group has developed TiO 2 hybrid composites based on photocrosslinked matrices, since the utilization of photocuring technology (photopolymerization/photocrosslinking) for the preparation of polymeric materials is a convenient, very simple, non-invasive technique that does not require expensive devices and long reaction times [53]. In a first report, thin composite films were obtained by the photopolymerization of an acrylic monomer mixture, namely an acidic urethane dimethacrylate based on poly(ethylene glycol) as the major component (80 wt %), 3-(trimethoxysilyl)propyl methacrylate as the inorganic component (10 wt %) able to create the silsesquioxane sequences and 3-(acryloyloxy)-2-hydroxy-propyl methacrylate as a coupling agent (10 wt %) to generate interactions between the organic and the inorganic phases [53]. Titanium butoxide derivative was added to the mixture before photopolymerization in different gravimetric ratios (5-20 wt %).…”

Mussel-inspired immobilization of Au on bare and graphene-wrapped Ni nanoparticles toward highly efficient and easily recyclable catalysts

“…AuNP was chosen as it has remarkable catalytic efficiency and has been used profusely in prior studies. [15][16][17][18][19] Using NiNP in the nanocomposite provide means for easy magnetic separation and might also enhance the catalytic activity. For the fabrication of these nanocomposites, two core-shell structures were synthesized using bare NiNPs and graphene-coated NiNPs (Ni-G) as the core and polydopamine (PD) as the shell.…”