Preparation and characterization of photocured thiol‐ene hydrogel: Adsorption of Au(III) ions from aqueous solutions

Abstract

In this study, photocured a novel thiol-ene hydrogels based on P(Penta3MP4/PEG-DA/HEMA) were investigated for adsorption of Au(III) ions from aqueous solutions purposes. The photopolymerization kinetics of thiol-ene-based formulations was investigated by real-time infrared spectroscopy. The chemical composition and surface morphology of hydrogels were also characterized. The effect of different parameters on Au(III) adsorption efficiency was examined in detail. Better adsorption behav-ior was achieved for Au(III) by P(Penta3MP4/PEG-DA/ HEMA) F1 hydrogels. The maximum uptake for Au(III) was at pH 0.5. Both Langmuir and Freundlich adsorption isotherm models were applied and the reusability of thiolene hydrogels investigated.

Thiol–ene “click” reactions and recent applications in polymer and materials synthesis: a first update

“…Since the current interest in the thiol-ene reaction is due, predominantly, to the pioneering work of Bowman and coworkers and Hoyle et al in highly homogeneous thioether network syntheses it is not surprising that the use of this reaction has continued to attract signicant attention in the preparation and application of crosslinked polymers/ materials. 225 Within this broad research eld there has been signicant interest in the preparation and application of hydrogels, [226][227][228][229][230][231][232][233] the synthesis of crosslinked beads/polymeric nanoparticles, 234,235 the development of dental restorative materials, [236][237][238][239] nanoprint/so lithography, [240][241][242][243] as well as the preparation of porous materials by emulsion templating, 244,245 the synthesis of novel polyanhydride networks, 246,247 and gas barrier and transport properties associated with thiol-ene networks. [248][249][250][251] Additionally, there have been numerous reports detailing the general synthesis and properties of new thiol-enebased networks and crosslinked materials [252][253][254][255][256][257][258][259][260][261][262][263]…”

Selective adsorption of Au3+ from aqueous solutions using persimmon powder‐formaldehyde resin

“…Among these methods, adsorption is promising for the gold recovery because it offers prominent advantages, especially can be applied for the water treatment at low concentrations. For this reason, numerous studies on the gold adsorption have been conducted so far using various adsorbents such as activated carbon, minerals, synthetic resin, hydrogel, nanocomposite, and so on. Nevertheless, these adsorbents are not so effective (low capacity and/or poor selectivity) or have high cost.…”

The Role of a Nitro Substituent in C‐Phenylcalix[4]resorcinarenes to Enhance the Adsorption of Gold(III) Ions

“…The Calix-2NO 2 showed a remarkably higher maximum adsorption capacity (272.70 mg g À 1 ) than other adsorbent materials, including those functionalized by thiourea and thiol groups. [29,[31][32][33] Even though the Calix-2NO 2 gave a similar level of adsorption capacity to those of the reported polyethyleneimine [14] and bisorbenttannin acid immobilized dialdehyde corn starch, [16] the Calix-2NO 2 required a much shorter equilibrium time (2 h) than either the polyethylene imine (6 h) [14] or the biosorbent-tannin acid immobilized dialdehyde corn starch (12 h), [16] highlighting the potential use of the Calix-2NO 2 as a good adsorbent for the gold(III) ions.…”