Extraction of copper ions from aqueous medium by microgel particles for in-situ fabrication of copper nanoparticles to degrade toxic dyes

Abstract

Most of the transition metal ions are toxic and their removal from water is important. For this purpose, nearly monodisperse spherical core shell microgel particles with diameter of 88 ± 3 nm have been synthesized by free radical precipitation polymerization method and characterized by fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), dynamic light scattering (DLS), and transmission electron microscopy (TEM). Extraction of copper ions from water under several conditions of pH, copper ions content and core shell microgel concentrations was undertaken. Several adsorption isotherms were tested to explore the process of adsorption of copper ions on the microgel particles. Kinetics of adsorption process was examined by pseudo first order, pseudo second order, intra-particle diffusion and Elovich models. Copper ions adsorbed in shell region of core shell microgel were reduced to copper nanoparticles. The hybrid microgel was used to reduce organic pollutants such as 4-nitrophenol (4NP), methylene blue (MB), and methyl orange (MO) in aqueous medium. The value of pseudo first order rate constant for catalytic reduction of 4NP, MB, and MO was found 0.602, 0.831, and 0.874 min−1 respectively. The resultant core shell hybrid microgel system can serve as efficient catalyst for numerous other organic transformations.

π-Electron-Extended Triazine-Based Covalent Organic Framework as Photocatalyst for Organic Pollution Degradation and H2 Production from Water

“…These porous sorbents, however, only adsorb contaminated dyes without degrading them, causing regeneration and secondary pollution issues [ 19 ]. However, recent research has focused on porous photocatalytic materials as potent new technological advances for removing and degrading polluted organic dyes from water [ 20 , 21 , 22 , 23 , 24 ]. Many inorganic porous materials, such as metal sulfides and oxides, have been investigated as photocatalysts for organic dye photodegradation.…”

Accelerating Density Functional Calculation of Adatom Adsorption on Graphene via Machine Learning

“…Graphene has also been considered as a nano-reinforcement for composites [ 5 , 6 , 7 ]. The interfacial properties of graphene are significant [ 8 ], and considerable research on the adsorption process [ 9 , 10 , 11 , 12 ] has been carried out. The hitherto-investigated elements used in metal single-atom supported by graphene include over half of the metal elements (37/64) in the first to sixth periods [ 2 ].…”

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

“…Various types of materials such as metal organic frameworks, 9 ligands, 10 polymers, 11 metal nanoparticles 12 and metal nanoparticles loaded in microgels [13][14][15][16][17][18] are reported for the removal of azo dyes. The metal nanoparticles have advantage on metal organic frameworks, ligands, and polymers due to their high catalytic efficiency and recyclable property.…”