An Effective Producing Method of Nanocomposites of Ag, Au, and Pd Nanoparticles with Poly(N-vinylpyrrolidone) and Nanocellulose

Electrochemical method for producing globules of ultrasmall rhodium nanoparticles with poly(N-vinylpyrrolidone) bound to the surface of nanocellulose fibers

“…The addition of CTAC (75 mmol L -1 ) to the nanocomposites causes the catalytic activity to increase by a factor of 1.6 owing to the micellar eff ect, which confi rms the results obtained earlier. 7,18,38,40 Since the electrolysis can also be accompanied by the side process of hydrogen evolution and the Rh III Rh 0 conversion proceeds only partially, the unreacted Rh III can contribute to catalysis of the reduction of p-nitrophen ol. Therefore, we studied the role of RhCl 3 in the reduction of p-nitrophenol with sodium borohydride proceeding in the presence of PVP and NC.…”

“…An improvement of the technique, viz., the use of methyl viologen (MV 2+ ) instead of BIQOQ, an aqueous medium instead of DMF and smaller-diameter NC fi bers (d = 57±36 nm) made it possible to perform an effi cient electrosynthesis aff ording nanocomposites consisting of small spherical Ag, Au, and Pd NPs encapsulated in PVP shells; the nanocomposites are uniformly bound to the surface of NC fi bers. 18 The mediator is not consumed in the course of the reaction, the nanocomposite is not deposited on the electrode, being dispersed in the solution bulk, and can be isolated with ease by centrifugation. The nanocomposites are catalytically active in the reduction of p-nitrophenol with sodium borohydride in aqueous medium.…”

Metallic nanoparticles for electrocatalytic reduction of halogenated organic compounds: A review

“…(2) Addition of surfactants Another method used to improve nanoparticles deposition is the use of surfactants. The most common surfactants are poly-(N-vinyl-2-pyrrolidone) (PVP, MW-10000) [107][108][109], sodium carboxymethylcellulose (CMC) [110], cetyltrimethylammonium bromide (CTAB) cetyltrimethylammonium chloride (CTAC) [41,107,111]. They play a key role in the physical separation of the NPs and in the inhibition of their agglomeration [88].…”

Gold Nanoparticles Based Optical Biosensors for Cancer Biomarker Proteins: A Review of the Current Practices

“…Such systems provide safe and effective diagnosis and targeted cancer treatment ( Wang et al, 2008 ). Different polymers used in the synthesis of AuNPs include poly (ethylene glycol) (PEG) ( Wang et al, 2020 ), Poly (N-vinylpyrrolidone) (PVP) ( Fazleeva et al, 2021 ), chitosan (CS) ( Hu et al, 2018 ), polystyrene (PS) ( Gálvez-Vergara et al, 2020 ), poly (methyl methacrylate) (PMMA) ( Wang and Seidel, 2021 ) and polyvinyl alcohol (PVA) ( Amourizi et al, 2020 ).…”