Hierarchical TiO2 layers prepared by plasma jets

0549935 - ÚFCH JH 2022 RIV CH eng J - Journal Article
Žouželka, Radek - Olejníček, Jiří - Kšírová, Petra - Hubička, Zdeněk - Duchoň, Jan - Martiniaková, Ivana - Mužíková, Barbora - Mergl, Martin - Kalbáč, Martin - Brabec, Libor - Kočiřík, Milan - Remzová, Monika - Vaněčková, Eva - Rathouský, Jiří
Hierarchical TiO2 layers prepared by plasma jets.
Nanomaterials. Roč. 11, č. 12 (2021), č. článku 3254. E-ISSN 2079-4991
R&D Projects: GA MŠMT(CZ) 8J20FR012; GA MŠMT LM2018110; GA MŠMT(CZ) EF16_013/0001821
Grant - others:GA MŠk(CZ) CZ.02.1.01/0.0/0.0/16_013/0001821; AV ČR(CZ) MSM200402101
Program: Program na podporu mezinárodní spolupráce začínajících výzkumných pracovníků
Institutional support: RVO:61388955 ; RVO:68378271
Keywords : External quantum efficiency * NO and phenol abatement x * p25 * Photocatalysis * TiO 2
OECD category: Physical chemistry; Condensed matter physics (including formerly solid state physics, supercond.) (FZU-D)
Impact factor: 5.719, year: 2021
Method of publishing: Open access

Heterogeneous photocatalysis of TiO2 is one of the most efficient advanced oxidation processes for water and air purification. Here, we prepared hierarchical TiO2 layers (Spikelets) by hollow-cathode discharge sputtering and tested their photocatalytic performance in the abatement of inorganic (NO, NO2) and organic (4-chlorophenol) pollutant dispersed in air and water, respectively. The structural-textural properties of the photocatalysts were determined via variety of physico-chemical techniques (XRD, Raman spectroscopy, SEM, FE-SEM. DF-TEM, EDAX and DC measurements). The photocatalysis was carried out under conditions similar to real environment con-ditions. Although the abatement of NO and NO2 was comparable with that of industrial benchmark Aeroxide® TiO2 P25, the formation of harmful nitrous acid (HONO) product on the Spikelet TiO2 layers was suppressed. Similarly, in the decontamination of water by organics, the mineralization of 4-chlorophenol on Spikelet layers was interestingly the same, although their reaction rate constant was three-times lower. The possible explanation may be the more than half-magnitude order higher external quantum efficacy (EQE) compared to that of the reference TiO2 P25 layer. Therefore, such favorable kinetics and reaction selectivity, together with feasible scale-up, make the hierarchical TiO2 layers very promising photocatalyst which can be used for environmental remediation.
Permanent Link: http://hdl.handle.net/11104/0325825