Doping of Metal Organic Framework (UiO) and for N02 adsorption at ambient Conditions
type: CreativeWork
description: Pollution issues and environmental concerns have led to the development of various air purification technologies. Nitrogen dioxide NO2 is one of the toxic gases in the atmosphere that is corrosive; it causes severe damage to materials, even at low concentrations. Research on the adsorption of this gas at atmospheric pressure and ambient temperatures is uncommon because of limited industrial applications. The thermal stability and microporous nature of Zirconium-based Metal Organic Framework (Zr-MOF) UiO-66 and UiO-67 make them good candidates for metal or amine decoration. The objective of this work was to investigate the effect of metal or amine doping (direct synthesis) on the textural properties and adsorption capabilities of UiO in both moist and dry conditions. The samples were characterized before and after exposure to NO2 by X-ray diffraction, scanning electron microscopy, N2- adsorption at 77K, thermal analysis, and infrared spectroscopy. The results indicate the importance of the dopant in the NO2 removal process. Favorable interactions between the dopant (incorporated in the MOF) and NO2 are exhibited in either condition depending on the chemistry of the dopant. These interactions result in the formation of nitrate and nitrite species. Moreover, organic ligands also contribute to NO2 reactive adsorption via nitration reaction.
abstract: Pollution issues and environmental concerns have led to the development of various air purification technologies. Nitrogen dioxide NO2 is one of the toxic gases in the atmosphere that is corrosive; it causes severe damage to materials, even at low concentrations. Research on the adsorption of this gas at atmospheric pressure and ambient temperatures is uncommon because of limited industrial applications. The thermal stability and microporous nature of Zirconium-based Metal Organic Framework (Zr-MOF) UiO-66 and UiO-67 make them good candidates for metal or amine decoration. The objective of this work was to investigate the effect of metal or amine doping (direct synthesis) on the textural properties and adsorption capabilities of UiO in both moist and dry conditions. The samples were characterized before and after exposure to NO2 by X-ray diffraction, scanning electron microscopy, N2- adsorption at 77K, thermal analysis, and infrared spectroscopy. The results indicate the importance of the dopant in the NO2 removal process. Favorable interactions between the dopant (incorporated in the MOF) and NO2 are exhibited in either condition depending on the chemistry of the dopant. These interactions result in the formation of nitrate and nitrite species. Moreover, organic ligands also contribute to NO2 reactive adsorption via nitration reaction.
author: Ebrahim, Amani M.
keywords: Pollution, Doping, metal organic, framework, enviromental conncerns, nitrogen, Chemical Engineering, Engineering
date published: 2013-01-01T08:00:00Z
date modified: 2026-07-24T01:56:52Z
provider: City University of New York - City College
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: City University of New York - City College