In situ deposition of Ag/AgCl on the surface of magnetic metal-organic framework nanocomposite and its application for the visible-light photocatalytic degradation of Rhodamine dye

Niyaz Mohammad Mahmoodi; Ali Taghizadeh; Mohsen Taghizadeh; Jafar Abdi

doi:10.1016/j.jhazmat.2019.06.018

In situ deposition of Ag/AgCl on the surface of magnetic metal-organic framework nanocomposite and its application for the visible-light photocatalytic degradation of Rhodamine dye

J Hazard Mater. 2019 Oct 15:378:120741. doi: 10.1016/j.jhazmat.2019.06.018. Epub 2019 Jun 6.

Authors

Niyaz Mohammad Mahmoodi¹, Ali Taghizadeh², Mohsen Taghizadeh², Jafar Abdi²

Affiliations

¹ Department of Environmental Research, Institute for Color Science and Technology, Tehran, Iran. Electronic address: mahmoodi@icrc.ac.ir.
² Department of Environmental Research, Institute for Color Science and Technology, Tehran, Iran.

PMID: 31200227
DOI: 10.1016/j.jhazmat.2019.06.018

Abstract

Herein, NH₂-MIL-125(Ti) (NMT) as one of the known stable metal-organic frameworks (MOFs) in aqueous solution was successfully magnetized with CoFe₂O₄ nanoparticles through the hydrothermal method. The Ag/AgCl as a plasmonic photocatalyst was assembled on the CoFe₂O₄/NMT (CFNMT) at room temperature by in situ deposition, and photo-reduction methods to improve the photocatalytic activity of CFNMT under LED visible light. The prepared materials were fully characterized by SEM/EDX, TEM, FTIR, XRD, UV-DRS, and VSM analysis. Rhodamin B (RhB) was selected as the pollutant model. The results showed that the Ag/AgCl@CFNMT had super-fast degradation ability of RhB molecule due to the synergetic effect between Ag/AgCl and CFNMT in comparison with NMT and CFNMT. The introduced Ag/AgCl on the surface of CFNMT increased absorption of photons in the visible region and enhanced the transfer and separation of the produced charge on the contact area between Ag/AgCl and CFNMT. Also, after seven times recycling, besides the simple magnetic separation of Ag/AgCl@CFNMT from liquid media, the composite still showed high photodegradation ability (89%).

Keywords: Ag/AgCl; CoFe(2)O(4) nanoparticles; In situ deposition and photo-reduction; Magnetic metal-organic frameworks; Photocatalytic degradation.