Catalytic degradation of azo dyes by bimetallic nanoparticles loaded in smart polymer microgels

Abstract

Bimetallic nanoparticles loaded in smart microgels have been synthesized successfully. The bimetallic nanoparticle-loaded microgel system showed excellent catalytic activity.

A review on Ag nanoparticles fabricated in microgels

“…The structure of microgels is like a sponge and the interstitial spaces of these microgels can be lled with water molecules. These hybrid microgels display temperature sensitivity as elucidated in the investigations conducted by Arif 11,30,55 and others. 73,74 The temperature sensitivity of hybrid microgels results due to hydrophilic and hydrophobic interactions within the network of hybrid microgel and with the surrounding water molecules.…”

“…(5) The structure of polymer is typically chemically inert and does not actively participate in the catalytic conversions. 55 (6) In certain instances where chemical reactions are catalyzed by Ag-based systems, the polymeric network provides a supportive environment that enhances the approaches of reactants from the bulk to the Ag surface, thereby contributing to rate enhancement.…”

Exploring microgel adsorption: synthesis, classification, and pollutant removal dynamics

“…The most commonly employed comonomers for polymerizing microgel adsorbents to induce multi-sensitivity and chelating properties are acrylic acid, 36 ethyleneimine, acrylamide, 35 2-acrylamido-2-methylpropane sulfonic acid, 30 and vinyl imidazole. 37 Acrylic acid (AAc) has a p K a value of 4.25, which means that when the pH exceeds its p K a , poly( N -isopropylacrylamide-AAc) P(NIPr-AAc) copolymer microgels swell due to the deprotonation of the carboxylic acid groups of AAc, as reported by Picard et al 38 The substantial negative charge present within microgels renders them highly effective as adsorbents for extracting heavy metal ions 39–42 as well as various dyes 43–49 from aqueous solutions. Additionally, positively charged microgels can be employed as efficient adsorbents for capturing negatively charged pollutants.…”

Recent developments on microwave-assisted organic synthesis of nitrogen- and oxygen-containing preferred heterocyclic scaffolds

“…Oxygen-containing molecules such as coumarins are also present in nature and display various biological functions. [45][46][47] Chemical modication of these secondary metabolites is needed to obtain diverse derivatives that can fulll 3D chemical space. Thus, microwave-assisted synthetic modication evolved is a powerful tool which can complete reactions in a shorter time and furnish the desired products in high yields.…”