Next Article in Journal
Effect of TiB2 Content on Properties of Nickel-Coated Graphite Self-Lubricating Coating Prepared by Laser Cladding
Previous Article in Journal
Phase-Change Metasurface by U-Shaped Atoms for Photonic Switch with High Contrast Ratio
Previous Article in Special Issue
A Novel Accelerated Aging Test for Floats in a Floating Photovoltaic System
Article

Dual Use of Copper-Modified TiO2 Nanotube Arrays as Material for Photocatalytic NH3 Degradation and Relative Humidity Sensing

1
Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
2
Faculty of Geotechnical Engineering, University of Zagreb, Hallerova aleja 7, HR-42000 Varaždin, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: Joaquim Carneiro
Coatings 2021, 11(12), 1500; https://doi.org/10.3390/coatings11121500
Received: 7 November 2021 / Revised: 21 November 2021 / Accepted: 3 December 2021 / Published: 6 December 2021
(This article belongs to the Special Issue Photocatalytic Nanoporous Thin Films)
In this paper, we emphasized the dual application of Cu-modified vertically aligned TiO2 nanotube arrays as photocatalyst and a relative humidity sensor. The TiO2 nanotube arrays were obtained by anodization of the titanium layer prepared using radio frequency magnetron sputtering (RFMS) and modified with different copper concentrations (0.5, 1, 1.5, and 2 M) by a wet-impregnation method. The sample modified with 2 M Cu(NO3)2 solution showed the highest efficiency for the NH3 photocatalytic degradation and the most pronounced humidity response in comparison to the other studied samples. In order to investigate the structure and impact of Cu modification, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) were used. The photocatalytic activity and the kinetic study of ammonia oxidation were studied in a mini-photocatalytic wind tunnel reactor (MWPT), while relative humidity sensing was examined by impedance spectroscopy (IS). Higher NH3 oxidation was a direct consequence of the increased generation of OH radicals obtained by a more efficient photogenerated charge separation, which is correlated with the increase in the DC conductivity. View Full-Text
Keywords: Cu modification; TiO2 nanotubes; ammonia oxidation; humidity sensing Cu modification; TiO2 nanotubes; ammonia oxidation; humidity sensing
Show Figures

Graphical abstract

MDPI and ACS Style

Čižmar, T.; Grčić, I.; Bohač, M.; Razum, M.; Pavić, L.; Gajović, A. Dual Use of Copper-Modified TiO2 Nanotube Arrays as Material for Photocatalytic NH3 Degradation and Relative Humidity Sensing. Coatings 2021, 11, 1500. https://doi.org/10.3390/coatings11121500

AMA Style

Čižmar T, Grčić I, Bohač M, Razum M, Pavić L, Gajović A. Dual Use of Copper-Modified TiO2 Nanotube Arrays as Material for Photocatalytic NH3 Degradation and Relative Humidity Sensing. Coatings. 2021; 11(12):1500. https://doi.org/10.3390/coatings11121500

Chicago/Turabian Style

Čižmar, Tihana, Ivana Grčić, Mario Bohač, Marta Razum, Luka Pavić, and Andreja Gajović. 2021. "Dual Use of Copper-Modified TiO2 Nanotube Arrays as Material for Photocatalytic NH3 Degradation and Relative Humidity Sensing" Coatings 11, no. 12: 1500. https://doi.org/10.3390/coatings11121500

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop