Biphasic anatase-brookite nanoparticles prepared by sol-gel complex synthesis and their photocatalytic activity in hydrogen production
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F15%3APU113184" target="_blank" >RIV/00216305:26620/15:PU113184 - isvavai.cz</a>
Výsledek na webu
<a href="http://www.sciencedirect.com/science/article/pii/S0360319915000178" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0360319915000178</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijhydene.2015.01.008" target="_blank" >10.1016/j.ijhydene.2015.01.008</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Biphasic anatase-brookite nanoparticles prepared by sol-gel complex synthesis and their photocatalytic activity in hydrogen production
Popis výsledku v původním jazyce
Titanium tetraisopropoxide was used as the precursor in the preparation of TiO2 nanoparticles via sol-gel complex synthesis. The complex-forming (chelate-forming) substances used were glycine, EDTA, acetylacetone, and hydroxycarboxylic acids (lactic acid – LA, citric acid – CA, tartaric acid – TA) and their salts (sodium citrate – CA-Na, ammonium citrate – CA-NH4, lithium lactate – LA-Li). Biphasic anatase-brookite nanoparticles were prepared by hydrothermal and solid-state reactions. The specific surface of the particles ranged from 202 to 292 m2/g. Their composition was studied by means of X-ray diffraction. The nanoparticles were studied using differential scanning calorimetry and thermogravimetric analysis. The widths of band gaps were examined using UV-VIS spectroscopy. The Eg values of biphasic TiO2 were in the range from 3.08 to 3.21 eV. The photocatalytic activity of the samples prepared was tested on hydrogen production. The maximum rate of H2 evolution was catalysed by anatase-brookite nanoparticles with 36 % of brookite, which were prepared using lactic acid. The minimum rate of H2 evolution was observed in the presence of particles of anatase prepared by means of acetylacetone. Cooperative behaviour of the anatase and brookite phases was observed in the nanoparticles, which retarded the recombination of holes and electrons and led to a photocatalytic activity that was higher than the activities of the two separate phases.
Název v anglickém jazyce
Biphasic anatase-brookite nanoparticles prepared by sol-gel complex synthesis and their photocatalytic activity in hydrogen production
Popis výsledku anglicky
Titanium tetraisopropoxide was used as the precursor in the preparation of TiO2 nanoparticles via sol-gel complex synthesis. The complex-forming (chelate-forming) substances used were glycine, EDTA, acetylacetone, and hydroxycarboxylic acids (lactic acid – LA, citric acid – CA, tartaric acid – TA) and their salts (sodium citrate – CA-Na, ammonium citrate – CA-NH4, lithium lactate – LA-Li). Biphasic anatase-brookite nanoparticles were prepared by hydrothermal and solid-state reactions. The specific surface of the particles ranged from 202 to 292 m2/g. Their composition was studied by means of X-ray diffraction. The nanoparticles were studied using differential scanning calorimetry and thermogravimetric analysis. The widths of band gaps were examined using UV-VIS spectroscopy. The Eg values of biphasic TiO2 were in the range from 3.08 to 3.21 eV. The photocatalytic activity of the samples prepared was tested on hydrogen production. The maximum rate of H2 evolution was catalysed by anatase-brookite nanoparticles with 36 % of brookite, which were prepared using lactic acid. The minimum rate of H2 evolution was observed in the presence of particles of anatase prepared by means of acetylacetone. Cooperative behaviour of the anatase and brookite phases was observed in the nanoparticles, which retarded the recombination of holes and electrons and led to a photocatalytic activity that was higher than the activities of the two separate phases.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10402 - Inorganic and nuclear chemistry
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2015
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
ISSN
0360-3199
e-ISSN
1879-3487
Svazek periodika
40
Číslo periodika v rámci svazku
7
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
13
Strana od-do
2950-2962
Kód UT WoS článku
000350187500006
EID výsledku v databázi Scopus
2-s2.0-84922368051