Bio-inspired Catechol-based Hypercrosslinked Polymer for Iron (Fe) Removal from Water

Fe-Immobilised Catechol-Based Hypercrosslinked Polymer as Heterogeneous Fenton Catalyst for Degradation of Methylene Blue in Water

“…The isotherms of the catechol-HCP before (catechol-HCP-w, green triangle) and after (catechol-HCP-Fe, red circle) Fe immobilisation demonstrated the similar shapes and gas sorption capabilities. The surface areas, calculated by the Brunauer-Emmet-Teller (BET) theory, of the catechol-HCP-w and catechol-HCP-Fe were around 2.4 and 1.9, respectively, comparable to the reported values [54]. After the Fe was immobilised, a slight decline in surface area was observed, implying the adsorption of Fe into the porous structure.…”

“…A black powder of catechol-HCP was obtained in a good yield (99%). The result also demonstrated the possibility of scaling up the synthesis of material as a 10-g-scale of material was successfully synthesised without the reduction of the yield as compared to the smaller-scale synthesis reported in the literature [54].…”

“…The catechol structure has also been found to interact well with Fe. Recently, our group reported the enhancement of Fe adsorption in HCP using the catechol moiety [54]. Apart from increasing the interaction with Fe, the catechol moiety can also behave as a chelating agent to increase the regeneration of Fe 2+ in the material, which can increase the catalytic activity of the Fenton reaction [55,56].…”

Eco-Friendly Production of Hyper-Cross-Linked Polymers Using Mechanosynthesis and Bioresources: A Critical Review

“…Indeed, catechol possesses high inherent affinity for Fe ions, due to the positions of their functional groups, which was confirmed by the selection of other monomers, such as toluene, phenol, and hydroquinone. Thus, the HCP derived from catechol presented the highest Fe 2+ uptake, reaching more than 80 wt % adsorption of the Fe 2+ concentration in solution, compared to about 20 wt % for the HCPs derived from the other monomers (Figure C), even though the A BET was much higher for the toluene-based HCP (745 m 2 /g) compared to the others (ranging from 3 to 32m 2 /g) . HCPs synthesized from catechol, FDA, and using a solvent-based FC reaction were also used as supports for silver nanoparticles, and the materials showed high antibacterial activities.…”

“…Thus, the HCP derived from catechol presented the highest Fe 2+ uptake, reaching more than 80 wt % adsorption of the Fe 2+ concentration in solution, compared to about 20 wt % for the HCPs derived from the other monomers (Figure 9C), even though the A BET was much higher for the toluene-based HCP (745 m 2 /g) compared to the others (ranging from 3 to 32m 2 /g). 105 HCPs synthesized from catechol, FDA, and using a solvent-based FC reaction were also used as supports for silver nanoparticles, and the materials showed high antibacterial activities. Damage to the cell structure was observed by examining SEM images of cultures with and without the presence of Ag in the HCPs (Figure 9D).…”