This work demonstrates a novel polyamide/SiO2/gelatin composite's enhanced binding for Hg2+ and dyes, indicating its potential for effective environmental applications.
In this study, a novel polyamide (PA)/SiO 2 /gelatin (GL) in situ hybrid material (PA‐Si‐GL) was successfully prepared at room temperature by introducing amphoteric biomass, GL, as a reaction substrate into benzoxazine‐isocyanide chemistry (BIC)/sol–gel reaction system. The systematic characterization of PA‐Si‐GL's chemical structure and fundamental properties was implemented subsequently. The in situ integration of GL with diverse N,O‐containing segments (amide, phenol OH, and SiOSi) present in PA/SiO 2 fraction could strengthen the affinity between PA‐Si‐GL and Hg 2+ /dyes. PA‐Si‐GL's binding for Hg 2+ was reasonably utilized to realize the probing of this highly poisonous heavy metal. With PA‐Si‐GL as the active modifier, the modified glassy carbon electrode (GCE) (termed as PA‐Si‐GL/GCE) exhibited a specific enrichment‐enhanced electrochemical response toward Hg 2+ , with a detection limit as low as 2.8 × 10 −10 mol/L. Concurrently, PA‐Si‐GL can remove both anionic (Congo red [CR]) and cationic (methylene blue [MB]) dyes from contaminant water. The maximum adsorption capacities of PA‐Si‐GL for CR/MB reached 680.1/1001.3 mg/g (298 K), respectively. Mechanistic studies regarding Hg 2+ probing and dyes adsorption by PA‐Si‐GL were carried out by the combination of experimental comparison and chemical calculation.
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Liu et al. (2025) studied this question.
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