Fabrication of bifunctional macroporous adsorption resin via grafting carbon dot and application in the detection and adsorption of iron (III) ion. (March 2023) - Wang, Hongwei
Abstract: The development of functional material is significant to remove heavy metal ions from water environment. Herein, macroporous adsorption resin (MAR) of poly(glycidyl methacrylate- co -ethylene dimethacrylate) (poly(GMA- co -EDMA)) was selected as a substrate. Then, a functional monomer, 3-(triallylsilyl)propyl acrylate (TAPA), possessing three alkenyl groups, was grafted onto the surface of MAR via surface-initiated atom transfer radical polymerization (SI-ATRP). Subsequently, a kind of carbon dot (CD) with blue fluorescence fabricated with malonic acid and glutathione as precursors was anchored onto the surface of MAR to produce a bi-functional resin, assigned as MAR@poly(TAPA)-CD. Owning to fluorescence property of MAR@poly(TAPA)-CD and presenting different fluorescence quenching for metal ions, especially for Fe 3+ ions, the degree of quenching reached 46.2%. A linear range for 10–80 nmol L −1 (correlation coefficient of 0.9909) was acquired, meanwhile, the limit of detection about 9.74 nmol L −1 was measured, which could be applied in the trace detection. In addition, the functionalized MAR@poly(TAPA)-CD was also utilized in adsorption of Fe 3+ ion, and exhibited high adsorption capacity of 32.9 mg g −1 . The equilibrium time for adsorption of Fe 3+ occurred at 45 min. Thus, the bifunctional material can simultaneously achieve detection and adsorption of Fe 3+ ion in aqueous solution, demonstrating great potential for commercialization. Graphical Abstract: ga1 Highlights: A bifunctional material was fabricated via grafting carbon dot onto resin. Both detection and adsorption of Fe 3+ ion were achieved with the material. Great sensitivity allowed it to be applied in trace detection of Fe 3+ ion.