Synthesis and characterization of inorganic–organic polymer microgels for catalytic reduction of 4‐nitroaniline in aqueous medium

Citations Over TimeTop 10% of 2016 papers

Abstract

Poly( N ‐isopropylacrylamide‐ co ‐acrylic acid) [p(NiPA‐ co ‐AAc)] microgel particles were synthesized by free radical precipitation polymerization in aqueous medium. Silver nanoparticles (Ag NPs) were fabricated inside the microgels by in situ reduction method. UV–visible, Fourier transform infrared (FTIR), and dynamic light scattering techniques were used for characterization of pure microgels. The Ag‐p(NiPA‐ co ‐AAc) hybrid microgels were characterized by UV–visible, FTIR, X‐ray diffraction, and transmission electron microscopy. The hybrid microgel system was used as a catalyst for reduction of 4‐nitroaniline (4‐NA) in aqueous medium. The kinetics of the catalytic reduction of 4‐NA under various conditions of concentration of hybrid microgels, sodium borohydride (NaBH 4 ), and 4‐NA was monitored by UV–visible spectrophotometry. It was found that the value of apparent rate constant ( k app ) increases with increase of concentration of NaBH 4 and catalyst dosage while it remains constant at various concentrations of 4‐NA. The kinetic data were used to elaborate the conversion of 4‐NA into p ‐phenylenediamine on the basis of electron relaying effect of Ag NPs present inside the microgels. POLYM. COMPOS., 39:645–653, 2018. © 2016 Society of Plastics Engineers

Related Papers

• → Hydrogen generation from hydrolysis of sodium borohydride using Ru(0) nanoclusters as catalyst(2005)242 cited
• → Behavior of hydrogen evolution of aqueous sodium borohydride solutions(2007)45 cited
• → Inverse relation between the catalytic activity and catalyst concentration for the ruthenium(0) nanoparticles supported on xonotlite nanowire in hydrogen generation from the hydrolysis of sodium borohydride(2016)30 cited
• → Accelerating velocity of hydrogen generation from sodium borohydride by citric acid catalyst(2012)6 cited
• → Borohydride-enhanced photodehalogenation of Aroclor 1232, 1242, 1254, and 1260(1988)17 cited