Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 32, 2012
Previous Article Next Article

Ag nanoparticle-entrapped hydrogel as promising material for catalytic reduction of organic dyes

Author affiliations

Abstract

A granular hydrogel based on chitosan (CTS) and acrylic acid (AA) was prepared using Fenton’s reagent as the redox initiator and N,N′-methylenebisacrylamide as the crosslinker under ambient conditions. The resulting three-dimensional (3D) networks can serve as micro- or nano-reactors for the production of highly stable silver nanoparticles by the in situ reduction of silver nitrate (AgNO3) with sodium borohydride (NaBH4) as reducing agent and Al3+ as surface crosslinking agent. The as-prepared Ag-entrapped hydrogel was successfully confirmed by means of Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA), and then tested to catalyze the NaBH4 reduction of two organic dyes: methylene blue (MB) and Congo red (CR). The catalytic results indicate that within 30 min, MB and CR with an initial concentration of 20 mg L−1 can be reduced completely, and the catalytic activity is independent of initial pH and ion strength. In addition, the Ag-entrapped hydrogel shows excellent reusability for ten successive cycles, with no appreciable decrease in the catalytic effects.

Graphical abstract: Ag nanoparticle-entrapped hydrogel as promising material for catalytic reduction of organic dyes

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 03 May 2012, accepted on 22 Jun 2012 and first published on 25 Jun 2012


Article type: Paper
DOI: 10.1039/C2JM32774K
Citation: J. Mater. Chem., 2012,22, 16552-16559
  •   Request permissions

    Ag nanoparticle-entrapped hydrogel as promising material for catalytic reduction of organic dyes

    Y. Zheng and A. Wang, J. Mater. Chem., 2012, 22, 16552
    DOI: 10.1039/C2JM32774K

Search articles by author