TiO2 and Nitrogen Doped TiO2 Prepared by Different Methods; on the (Micro)structure and Photocatalytic Activity in CO2 Reduction and N2O Decomposition

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39911961" target="_blank" >RIV/00216275:25310/18:39911961 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/18:10366666 RIV/61989100:27360/18:86100028 RIV/61989100:27640/18:86100028 RIV/61989100:27710/18:86100028

Result on the web

<a href="http://dx.doi.org/10.1166/jnn.2018.13936" target="_blank" >http://dx.doi.org/10.1166/jnn.2018.13936</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1166/jnn.2018.13936" target="_blank" >10.1166/jnn.2018.13936</a>

Result language

angličtina

Original language name

TiO2 and Nitrogen Doped TiO2 Prepared by Different Methods; on the (Micro)structure and Photocatalytic Activity in CO2 Reduction and N2O Decomposition

Original language description

TiO2 as nanostructured powders were prepared by (1) sol-gel process and (2) hydrothermal method in combination with (A) the processing by pressurized hot water and methanol or (B) calcination. The subsequent synthesis step was the modification of prepared nanostructured TiO2 with nitrogen using commercial urea. Textural, structural, surface and optical properties of prepared TiO2 and N/TiO2 were characterized by nitrogen physisorption, powder X-ray diffraction, X-ray photoelectron spectroscopy and DR UV-vis spectroscopy. It was revealed that TiO2 and N/TiO2 processed by pressurized fluids showed the highest surface areas. Furthermore, all prepared materials were the mixtures of major anatase phase and minor brookite phase, which was in nanocrystalline or amorphous (as nuclei) form depending on the applied preparation method. All the N/TiO2 materials exhibited enhanced crystallinity with a larger anatase crystallite-size than undoped parent TiO2. The photocatalytic activity of the prepared TiO2 and N/TiO2 was tested in the photocatalytic reduction of CO2 and the photocatalytic decomposition of N2O. The key parameters influencing the photocatalytic activity was the ratio of anatase-to-brookite and character of brookite. The optimum ratio of anataseto- brookite for the CO2 photocatalytic reduction was determined to be about 83 wt.% of anatase and 17 wt.% of brookite (amorphous-like) (TiO2-SG-C). The presence of nitrogen decreased a bit the photocatalytic activity of tested materials. On the other hand, TiO2-SG-C was the least active in the N2O photocatalytic decomposition. In the case of N2O photocatalytic decomposition, the modification of TiO2 crystallites surface by nitrogen increased the photocatalytic activity of all investigated materials. The maximum N2O conversion (about 63 % after 18 h of illumination) in inert gas was reached over all N/TiO2.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Nanoscience and Nanotechnology

ISSN

1533-4880

e-ISSN

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Volume of the periodical

18

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

688-698

UT code for WoS article

000417546800094

EID of the result in the Scopus database

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