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Title: Novel TiO{sub 2} prepared from titanyl sulphate by using pressurized water processing and its photocatalytic activity evaluation

Abstract

Highlights: • A novel preparation approach of TiO{sub 2} anatase from titanyl sulphate by using pressurized water processing. • Processing temperature affects crucially the TiO{sub 2} anatase crystallization. • Correlation between Raman FWHMs and XRD determined anatase crystallites-size enabling the estimation of anatase crystallites-size from Raman spectra. • The anatase crystallite-size and surface area are determining properties in AO7 photo-discolorization. • The band gap structure and rate of recombination of electrons and holes are the determining properties in N{sub 2}O photodecomposition. - Abstract: TiO{sub 2} anatase was prepared by a novel preparation approach, combining utilization of titanyl sulphate as a precursor and pressurized water processing. In addition, two different chemical methods for preparation were used – thermal hydrolysis and induced hydrolysis. The photoactivity of developed TiO{sub 2} was examined in two environmentally-prospective reactions: azo-dye AO7 photodiscoloration (oxidation) and N{sub 2}O photodecomposition (reduction). It was revealed that during the processing the temperature has a crucial effect on TiO{sub 2} crystallization contrary to pressure. TiO{sub 2} anatase of smaller crystallite-size showed significantly higher photoactivity in AO7 photodiscoloration than TiO{sub 2} anatase of large crystallite-size. However, in N{sub 2}O photodecomposition all synthesized materials showed comparable activity. While the TiO{sub 2} anatase crystallite-size andmore » surface area are the determining properties in azo-dye AO7 photodiscoloration, the electronic band structure and recombination rate of electron and holes are determining in N{sub 2}O photodecomposition. The correlation enabling the estimation of TiO{sub 2} anatase crystallite-size from Raman FWHMs was found as well.« less

Authors:
 [1]; ; ; ;  [1]; ;  [2]; ; ;  [1]
  1. Institute of Environmental Technology, VŠB-Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava-Poruba (Czech Republic)
  2. Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 5, 121 16 Prague 2 (Czech Republic)
Publication Date:
OSTI Identifier:
22730436
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 95; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AZO DYES; NITRIC OXIDE; NITROUS OXIDE; OXIDATION; PROCESSING; RAMAN SPECTRA; SULFATES; SURFACE AREA; TITANIUM OXIDES; X-RAY DIFFRACTION

Citation Formats

Matějová, Lenka, Polách, Lukáš, Lang, Jaroslav, Šihor, Marcel, Reli, Martin, Brunátová, Tereza, Daniš, Stanislav, Peikertová, Pavlína, Troppová, Ivana, and Kočí, Kamila. Novel TiO{sub 2} prepared from titanyl sulphate by using pressurized water processing and its photocatalytic activity evaluation. United States: N. p., 2017. Web. doi:10.1016/J.MATERRESBULL.2017.07.010.
Matějová, Lenka, Polách, Lukáš, Lang, Jaroslav, Šihor, Marcel, Reli, Martin, Brunátová, Tereza, Daniš, Stanislav, Peikertová, Pavlína, Troppová, Ivana, & Kočí, Kamila. Novel TiO{sub 2} prepared from titanyl sulphate by using pressurized water processing and its photocatalytic activity evaluation. United States. doi:10.1016/J.MATERRESBULL.2017.07.010.
Matějová, Lenka, Polách, Lukáš, Lang, Jaroslav, Šihor, Marcel, Reli, Martin, Brunátová, Tereza, Daniš, Stanislav, Peikertová, Pavlína, Troppová, Ivana, and Kočí, Kamila. Wed . "Novel TiO{sub 2} prepared from titanyl sulphate by using pressurized water processing and its photocatalytic activity evaluation". United States. doi:10.1016/J.MATERRESBULL.2017.07.010.
@article{osti_22730436,
title = {Novel TiO{sub 2} prepared from titanyl sulphate by using pressurized water processing and its photocatalytic activity evaluation},
author = {Matějová, Lenka and Polách, Lukáš and Lang, Jaroslav and Šihor, Marcel and Reli, Martin and Brunátová, Tereza and Daniš, Stanislav and Peikertová, Pavlína and Troppová, Ivana and Kočí, Kamila},
abstractNote = {Highlights: • A novel preparation approach of TiO{sub 2} anatase from titanyl sulphate by using pressurized water processing. • Processing temperature affects crucially the TiO{sub 2} anatase crystallization. • Correlation between Raman FWHMs and XRD determined anatase crystallites-size enabling the estimation of anatase crystallites-size from Raman spectra. • The anatase crystallite-size and surface area are determining properties in AO7 photo-discolorization. • The band gap structure and rate of recombination of electrons and holes are the determining properties in N{sub 2}O photodecomposition. - Abstract: TiO{sub 2} anatase was prepared by a novel preparation approach, combining utilization of titanyl sulphate as a precursor and pressurized water processing. In addition, two different chemical methods for preparation were used – thermal hydrolysis and induced hydrolysis. The photoactivity of developed TiO{sub 2} was examined in two environmentally-prospective reactions: azo-dye AO7 photodiscoloration (oxidation) and N{sub 2}O photodecomposition (reduction). It was revealed that during the processing the temperature has a crucial effect on TiO{sub 2} crystallization contrary to pressure. TiO{sub 2} anatase of smaller crystallite-size showed significantly higher photoactivity in AO7 photodiscoloration than TiO{sub 2} anatase of large crystallite-size. However, in N{sub 2}O photodecomposition all synthesized materials showed comparable activity. While the TiO{sub 2} anatase crystallite-size and surface area are the determining properties in azo-dye AO7 photodiscoloration, the electronic band structure and recombination rate of electron and holes are determining in N{sub 2}O photodecomposition. The correlation enabling the estimation of TiO{sub 2} anatase crystallite-size from Raman FWHMs was found as well.},
doi = {10.1016/J.MATERRESBULL.2017.07.010},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 95,
place = {United States},
year = {2017},
month = {11}
}