Chen Y, Yang L, Xu S, Han S, Chu S, Wang Z, Jiang C. Ultralight aerogel based on molecular-modified poly(
m-phenylenediamine) crosslinking with polyvinyl alcohol/graphene oxide for flow adsorption.
RSC Adv 2019;
9:22950-22956. [PMID:
35514494 PMCID:
PMC9067058 DOI:
10.1039/c9ra04207e]
[Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 07/14/2019] [Indexed: 12/05/2022] Open
Abstract
Poly(m-phenylenediamine) is an excellent adsorbent material. Nevertheless, it is difficult to recover and can even generate secondary pollution due to its powder-like form. Aerogels, monolithic three-dimensional structured materials, that are ultralight and have porous properties are efficient at adsorbing contaminants from water and can solve these problems. Here, we synthesized an aerogel based on molecular-modified poly(m-phenylenediamine) (mPmPD) crosslinking with polyvinyl alcohol (PVA) and graphene oxide (GO) (GO/mPmPD/PVA). Of note is that 3-aminophenylboronic acid was introduced into the polymer structure to induce a crosslinking reaction between boric acid units and PVA to constrain poly(m-phenylenediamine) in the aerogel. The GO/mPmPD/PVA aerogel shows stable mechanical properties in aqueous solution and an effective adsorption capacity for Ag(i); the maximum Ag(i) adsorption capacity is 917.41 mg g−1. The mechanism of Ag(i) adsorption and reduction was clarified in that Ag(i) chelated with imine units, and a redox reaction occured between Ag(i) and the benzenoid amine units. Furthermore, the GO/mPmPD/PVA aerogel also shows excellent adsorption ability toward methyl orange and Congo red dyes. This GO/mPmPD/PVA aerogel shows enormous potential for application to silver recovery and dye removal due to its low cost, effective adsorption capacity and facile separation with aqueous solution.
An aerogel composed of molecular-modified poly(m-phenylenediamine), polyvinyl alcohol and graphene oxide for Ag(i) recovery and dye removal is demonstrated.![]()
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