Kinetics of adsorption of oxalic acid on different titanium dioxide samples

FTIR-ATR kinetic studies on the adsorption of oxalic acid on different TiO2 films were performed. The particulate films were obtained through the evaporation of TiO2 suspensions. The evolution of the IR bands followed a pseudo-first-order behavior, as previously observed. Systematic studies as a fun...

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Detalles Bibliográficos
Autor principal:	Roncaroli, Federico
Publicado:	2011
Materias:	Adsorption ATR FTIR Kinetics Oxalic acid Surface complexation TiO2 Titanium dioxide Oxalic Acid TiO Desorption Organic acids Oxides Rate constants Titanium oxalic acid titanium dioxide adsorption kinetics article catalyst concentration (parameters) desorption diffusion evaporation evolution film infrared spectroscopy particle size particulate matter pollutant priority journal sensor suspension
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219797_v356_n1_p227_Roncaroli http://hdl.handle.net/20.500.12110/paper_00219797_v356_n1_p227_Roncaroli
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00219797_v356_n1_p227_Roncaroli
record_format	dspace
spelling	paper:paper_00219797_v356_n1_p227_Roncaroli2023-06-08T14:44:56Z Kinetics of adsorption of oxalic acid on different titanium dioxide samples Roncaroli, Federico Adsorption ATR FTIR Kinetics Oxalic acid Surface complexation TiO2 Titanium dioxide ATR FTIR Oxalic Acid Surface complexation TiO Desorption Organic acids Oxides Rate constants Titanium Titanium dioxide Adsorption oxalic acid titanium dioxide adsorption kinetics article catalyst concentration (parameters) desorption diffusion evaporation evolution film infrared spectroscopy particle size particulate matter pollutant priority journal sensor suspension FTIR-ATR kinetic studies on the adsorption of oxalic acid on different TiO2 films were performed. The particulate films were obtained through the evaporation of TiO2 suspensions. The evolution of the IR bands followed a pseudo-first-order behavior, as previously observed. Systematic studies as a function of the oxalic acid concentration afforded the specific rate constant for adsorption (ka) and desorption (kd). The influence of physical parameters of the samples, i.e., specific BET area, crystalline domain size, TiO2 load, film area, and pore size, on the kinetic parameters ka and kd was analyzed. A mechanism in which the adsorption and desorption processes are controlled by the diffusion through the pores of the films is proposed (intraparticle diffusion). It is concluded that all the samples behave in the same way. Thicker films or those with smaller particle size (higher specific surface area, smaller pores) show the slowest rates of adsorption and desorption. These results are relevant for the design of efficient heterogeneous catalysts and sensors, and for the interpretation of pollutant adsorption. © 2010 Elsevier Inc. Fil:Roncaroli, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219797_v356_n1_p227_Roncaroli http://hdl.handle.net/20.500.12110/paper_00219797_v356_n1_p227_Roncaroli
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Adsorption ATR FTIR Kinetics Oxalic acid Surface complexation TiO2 Titanium dioxide ATR FTIR Oxalic Acid Surface complexation TiO Desorption Organic acids Oxides Rate constants Titanium Titanium dioxide Adsorption oxalic acid titanium dioxide adsorption kinetics article catalyst concentration (parameters) desorption diffusion evaporation evolution film infrared spectroscopy particle size particulate matter pollutant priority journal sensor suspension
spellingShingle	Adsorption ATR FTIR Kinetics Oxalic acid Surface complexation TiO2 Titanium dioxide ATR FTIR Oxalic Acid Surface complexation TiO Desorption Organic acids Oxides Rate constants Titanium Titanium dioxide Adsorption oxalic acid titanium dioxide adsorption kinetics article catalyst concentration (parameters) desorption diffusion evaporation evolution film infrared spectroscopy particle size particulate matter pollutant priority journal sensor suspension Roncaroli, Federico Kinetics of adsorption of oxalic acid on different titanium dioxide samples
topic_facet	Adsorption ATR FTIR Kinetics Oxalic acid Surface complexation TiO2 Titanium dioxide ATR FTIR Oxalic Acid Surface complexation TiO Desorption Organic acids Oxides Rate constants Titanium Titanium dioxide Adsorption oxalic acid titanium dioxide adsorption kinetics article catalyst concentration (parameters) desorption diffusion evaporation evolution film infrared spectroscopy particle size particulate matter pollutant priority journal sensor suspension
description	FTIR-ATR kinetic studies on the adsorption of oxalic acid on different TiO2 films were performed. The particulate films were obtained through the evaporation of TiO2 suspensions. The evolution of the IR bands followed a pseudo-first-order behavior, as previously observed. Systematic studies as a function of the oxalic acid concentration afforded the specific rate constant for adsorption (ka) and desorption (kd). The influence of physical parameters of the samples, i.e., specific BET area, crystalline domain size, TiO2 load, film area, and pore size, on the kinetic parameters ka and kd was analyzed. A mechanism in which the adsorption and desorption processes are controlled by the diffusion through the pores of the films is proposed (intraparticle diffusion). It is concluded that all the samples behave in the same way. Thicker films or those with smaller particle size (higher specific surface area, smaller pores) show the slowest rates of adsorption and desorption. These results are relevant for the design of efficient heterogeneous catalysts and sensors, and for the interpretation of pollutant adsorption. © 2010 Elsevier Inc.
author	Roncaroli, Federico
author_facet	Roncaroli, Federico
author_sort	Roncaroli, Federico
title	Kinetics of adsorption of oxalic acid on different titanium dioxide samples
title_short	Kinetics of adsorption of oxalic acid on different titanium dioxide samples
title_full	Kinetics of adsorption of oxalic acid on different titanium dioxide samples
title_fullStr	Kinetics of adsorption of oxalic acid on different titanium dioxide samples
title_full_unstemmed	Kinetics of adsorption of oxalic acid on different titanium dioxide samples
title_sort	kinetics of adsorption of oxalic acid on different titanium dioxide samples
publishDate	2011
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219797_v356_n1_p227_Roncaroli http://hdl.handle.net/20.500.12110/paper_00219797_v356_n1_p227_Roncaroli
work_keys_str_mv	AT roncarolifederico kineticsofadsorptionofoxalicacidondifferenttitaniumdioxidesamples
_version_	1768541878018375680

Kinetics of adsorption of oxalic acid on different titanium dioxide samples

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