Novel TiO2 prepared from titanyl sulphate by using pressurized water processing and its photocatalytic activity evaluation
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F17%3A10238082" target="_blank" >RIV/61989100:27710/17:10238082 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/00216208:11320/17:10364368 RIV/61989100:27740/17:10238082
Výsledek na webu
<a href="https://www.sciencedirect.com/science/article/pii/S0025540817314496?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0025540817314496?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.materresbull.2017.07.010" target="_blank" >10.1016/j.materresbull.2017.07.010</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Novel TiO2 prepared from titanyl sulphate by using pressurized water processing and its photocatalytic activity evaluation
Popis výsledku v původním jazyce
TiO2 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 TiO2 was examined in two environmentally-prospective reactions: azo-dye AO7 photodiscoloration (oxidation) and N2O photodecomposition (reduction). It was revealed that during the processing the temperature has a crucial effect on TiO2 crystallization contrary to pressure. TiO2 anatase of smaller crystallite-size showed significantly higher photoactivity in AO7 photodiscoloration than TiO2 anatase of large crystallite-size. However, in N2O photodecomposition all synthesized materials showed comparable activity. While the TiO2 anatase crystallite-size and surface area are the determining properties in azodye AO7 photodiscoloration, the electronic band structure and recombination rate of electron and holes are determining in N2O photodecomposition. The correlation enabling the estimation of TiO2 anatase crystallite-size from Raman FWHMs was found as well.
Název v anglickém jazyce
Novel TiO2 prepared from titanyl sulphate by using pressurized water processing and its photocatalytic activity evaluation
Popis výsledku anglicky
TiO2 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 TiO2 was examined in two environmentally-prospective reactions: azo-dye AO7 photodiscoloration (oxidation) and N2O photodecomposition (reduction). It was revealed that during the processing the temperature has a crucial effect on TiO2 crystallization contrary to pressure. TiO2 anatase of smaller crystallite-size showed significantly higher photoactivity in AO7 photodiscoloration than TiO2 anatase of large crystallite-size. However, in N2O photodecomposition all synthesized materials showed comparable activity. While the TiO2 anatase crystallite-size and surface area are the determining properties in azodye AO7 photodiscoloration, the electronic band structure and recombination rate of electron and holes are determining in N2O photodecomposition. The correlation enabling the estimation of TiO2 anatase crystallite-size from Raman FWHMs was found as well.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
20501 - Materials engineering
Návaznosti výsledku
Projekt
<a href="/cs/project/GA14-23274S" target="_blank" >GA14-23274S: Nekonvenční příprava nanostrukturovaných oxidů kovů pomocí přetlakových a superkritických tekutin</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2017
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Materials Research Bulletin
ISSN
0025-5408
e-ISSN
—
Svazek periodika
95
Číslo periodika v rámci svazku
November
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
17
Strana od-do
30-46
Kód UT WoS článku
000412378500005
EID výsledku v databázi Scopus
2-s2.0-85025148974