Synthesis of chitosan supported palladium nanoparticles and its catalytic activity towards 2-nitrophenol reduction

In situ production of high purity noble metal nanoparticles on fumed silica and catalytic activity towards 2-nitrophenol reduction

“…10) explains the mechanism reaction as 2-NPh is diffuses form the aqueous solution to the catalytic NPs and then NPs are transferring the protons to 2-NPh molecule. The UV-vis peak shift from 283 nm to 291 nm can be attributed to the formation of 2-aminophenol [5]. Another peak shift observed in the literature is this of the 414 nm to 346 nm, indicating that −NO2 is reduced to −NH2 in the presence of Ag@Pt/sepiolite catalyst [1].…”

“…A promising method is the catalytic reduction of nitrophenols, a rapid reaction producing aminophenols. The catalytic reduction using sodium borohydride as reductant and noble metal nanoparticles as catalyst has been demonstrated to be an effective combination and the reaction has been used as a model for the study of catalytic activity of nanoparticles (NPs) in aqueous solution [2][3][4][5]. 4-nitrophenol is by far the most studied nitrophenol and several noble NPs support materials have been used such as carbons, polymers, metal-and covalent-organic frameworks, oxides and porous silica.…”

“…4-nitrophenol is by far the most studied nitrophenol and several noble NPs support materials have been used such as carbons, polymers, metal-and covalent-organic frameworks, oxides and porous silica. 2-nitrophenol (2-NPh) studies are less; Pd NPs on chitosan and metal-organic frameworks, core-shell Ag@Pt nanoparticles supported on sepiolite nanofibers, Ag-deposited silanized magnetite and Au-Pd bimetallic foams have been reported catalysts in reaction of 2-NPh reduction [5][6][7][8][9]. The remarkable reactivity of nanoparticles of Pt-group metal makes them excellent catalysts for chemical reactions, but in dispersion individual nanoparticles have tendency to agglomerate [10].…”

Plasma‐assisted synthesis and deposition of molybdenum oxide nanoparticles on polyethylene terephthalate for photocatalytic degradation of rhodamine B

“…However, in the second run, the composite did not have reproducible results. In Reference [70], a polyaniline/ molybdenum trioxide composite was prepared by a chemical oxidative polymerization method. Photocatalytic degradation of methylene blue and the adsorption activity of composite were evaluated in this study.…”

Photocatalytic Degradation of Methylene Blue Dye Using Chitosan Silica Composite

“…In order to increase the cationic dye degradation capacity of chitosan, various functional groups have been used to modify the chitosan [9]. Many attempts have already been reported for the degradation of methylene blue dye using chitosan based materials like chitosan zinc oxide hybrid composite [10], chitosan/ZnO nanocomposites [11], chitosan grafted polyaniline/Co 3 O 4 nanocube nanocomposites [12], chitosan-copper oxide hybrid material [13], TiO 2 -chitosan porous materials [14] using UV light irradiation.…”