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Media type:
E-Book
Title:
Immobilizing Fe0 Nanoparticles on Covalent Organic Framework
:
Towards Enhancement of Cr(Vi) Removal by Adsorption and Reduction Synergistic Effect
Description:
Nanoscale zero-valent iron (NZVI, Fe0) has been widely used for reduction of strong toxic Cr(VI) to low toxic Cr(III), however, given the easy aggregation of NZVI, developing new skeleton support for NZVI is highly desirable. In this study, via a simple in-situ growth method, NZVI was immobilized on porous TpPa-1 covalent organic frameworks (COFs) with dopamine (DOPA) as a connector, making it an effective adsorbent for adsorption and reduction of Cr(VI) from aqueous solution. The COFs with porous crystal structure provide controlled anchors for Fe0 loading as well as the reaction sites. Results verify that the Fe0/TpPa-1DOPA expressed an excellent performance in Cr(VI) removal due to synergistic effect of the composite, with the maximum removal capacity high up to 516 mg/g. Furthermore, it maintained high removal capacity under acidic, neutral and alkaline environments. Overall, the Fe0/TpPa-1@DOPA is a promising material for Cr(VI) removal from wastewater in practical application