光催化
材料科学
化学工程
矿化(土壤科学)
反应速率常数
选择性
环境化学
催化作用
动力学
化学
氮气
有机化学
物理
量子力学
工程类
作者
Radek Žouželka,J. Olejníček,P. Kšírová,Zdeněk Hubička,Jan Duchoň,Ivana Martiniakova,Barbora Muzikova,Martin Mergl,Martin Kalbáč,Libor Brabec,Milan Kočiřı́k,Monika Remzová,Eva Vaněčková,Jiřı́ Rathouský
出处
期刊:Nanomaterials
[Multidisciplinary Digital Publishing Institute]
日期:2021-11-30
卷期号:11 (12): 3254-3254
被引量:3
摘要
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 conditions. 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.
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