N-TiO 2: Chemical synthesis and photocatalysis

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The chemical synthesis of nitrogen-doped titanium dioxide (N-TiO 2) is explored in an attempt to understand the mechanisms of doping. Urea is used as precursor in a sol gel synthesis of N-TiO 2. Chemical and structural changes during thermal treatment of the precursors were followed by several techn...

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Autores principales: Factorovich, M., Guz, L., Candal, R.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_16877985_v2011_n_p_Factorovich
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_16877985_v2011_n_p_Factorovich2023-10-03T16:29:54Z N-TiO 2: Chemical synthesis and photocatalysis Factorovich, M. Guz, L. Candal, R. The chemical synthesis of nitrogen-doped titanium dioxide (N-TiO 2) is explored in an attempt to understand the mechanisms of doping. Urea is used as precursor in a sol gel synthesis of N-TiO 2. Chemical and structural changes during thermal treatment of the precursors were followed by several techniques. The effect of doping on band gap, morphology, and microstructure was also determined. The byproducts produced during firing correspond to those obtained during urea thermal decomposition. Polynitrogenated colored compounds produced at temperatures below 400°C may act as sensitizer. Incorporation of N in the TiO 2 structure is possible at higher temperatures. Degradation experiments of salicylic acid under UVA and visible light (γ≥400 nm) in the presence of TiO 2 or N-TiO 2 indicate that doping decreases the activity under UVA light, while stable byproducts are produced under visible light. © 2011 Matias Factorovich et al. Fil:Candal, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_16877985_v2011_n_p_Factorovich
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The chemical synthesis of nitrogen-doped titanium dioxide (N-TiO 2) is explored in an attempt to understand the mechanisms of doping. Urea is used as precursor in a sol gel synthesis of N-TiO 2. Chemical and structural changes during thermal treatment of the precursors were followed by several techniques. The effect of doping on band gap, morphology, and microstructure was also determined. The byproducts produced during firing correspond to those obtained during urea thermal decomposition. Polynitrogenated colored compounds produced at temperatures below 400°C may act as sensitizer. Incorporation of N in the TiO 2 structure is possible at higher temperatures. Degradation experiments of salicylic acid under UVA and visible light (γ≥400 nm) in the presence of TiO 2 or N-TiO 2 indicate that doping decreases the activity under UVA light, while stable byproducts are produced under visible light. © 2011 Matias Factorovich et al.
format JOUR
author Factorovich, M.
Guz, L.
Candal, R.
spellingShingle Factorovich, M.
Guz, L.
Candal, R.
N-TiO 2: Chemical synthesis and photocatalysis
author_facet Factorovich, M.
Guz, L.
Candal, R.
author_sort Factorovich, M.
title N-TiO 2: Chemical synthesis and photocatalysis
title_short N-TiO 2: Chemical synthesis and photocatalysis
title_full N-TiO 2: Chemical synthesis and photocatalysis
title_fullStr N-TiO 2: Chemical synthesis and photocatalysis
title_full_unstemmed N-TiO 2: Chemical synthesis and photocatalysis
title_sort n-tio 2: chemical synthesis and photocatalysis
url http://hdl.handle.net/20.500.12110/paper_16877985_v2011_n_p_Factorovich
work_keys_str_mv AT factorovichm ntio2chemicalsynthesisandphotocatalysis
AT guzl ntio2chemicalsynthesisandphotocatalysis
AT candalr ntio2chemicalsynthesisandphotocatalysis
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