<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Pany, Biswajit</style></author><author><style face="normal" font="default" size="100%">Majumdar, Amrito Ghosh</style></author><author><style face="normal" font="default" size="100%">Bhat, Suresh</style></author><author><style face="normal" font="default" size="100%">Si, Satybrata</style></author><author><style face="normal" font="default" size="100%">Yamanaka, Junpei</style></author><author><style face="normal" font="default" size="100%">Mohanty, Priti S.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Polymerized stimuli-responsive microgel hybrids of silver nanoparticles as efficient reusable catalyst for reduction reaction</style></title><secondary-title><style face="normal" font="default" size="100%">Heliyon</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Light scattering</style></keyword><keyword><style  face="normal" font="default" size="100%">Microgel-metal hybrids</style></keyword><keyword><style  face="normal" font="default" size="100%">Nanomaterial catalysts</style></keyword><keyword><style  face="normal" font="default" size="100%">PNIPAM microgels</style></keyword><keyword><style  face="normal" font="default" size="100%">Polymerized hydrogel matrix(PGM</style></keyword><keyword><style  face="normal" font="default" size="100%">Stimuli-responsive microgels</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2024</style></year><pub-dates><date><style  face="normal" font="default" size="100%">MAR</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">10</style></volume><pages><style face="normal" font="default" size="100%">e26244</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;
	We have showcased the potential of polymerized hydrogels (PGMs) with uniform -sized stimuliresponsive microgel particles as promising alternatives to prevent aggregation in solution based nanoparticle systems. In the current work, we implemented the PGM concept by embedding anionic stimuli -responsive microgels (PNIPAM-co-AAc)-silver (Ag) hybrids within a hydrogel matrix. These PGM@AgNP hybrid materials are used as catalysts for the reduction of 4-nitrophenol (4 -NP) to 4-aminophenol (4 -AP) in the presence of sodium borohydride. UV-VIS spectroscopy is used for studying catalytic activity. In the solution based system, the complete reduction of 4NP to 4 -AP took 30 minutes with pure Ag nanoparticles, 24 minutes with PNIPAM-Ag hybrid (Neutral) microgels and 15 minutes with PNIPAM-co-AAc-Ag (Anionic) hybrid microgels. In contrast PGM containing PNIPAM-co-AAc-Ag hybrids achieved full reduction in just 15 minutes, along with a 3 -minute induction period. For pure Ag nanoparticles, the first -order rate constant is found to be 0.25 min - 1, for PNIPAM-Ag hybrid (Neutral), it is 0.21 min- 1 and for PNIPAM-coAAc-Ag (Anionic), it is 0.5 min- 1 where as for PGM containing anionic microgel hybrids it is found to be 0.8 min - 1. Furthermore, the reusability of the PGM-Ag (anionic) materials for catalytic activity remains unaltered even after several washings. In summary, our study highlights the effectiveness of PGM@AgNP materials as efficient catalysts for the reduction of 4-nitrophenol to 4-aminophenol, indicating their versatile potential in various catalytic applications.&lt;/p&gt;
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