ZrO2 was deposited on anatase TiO2 nanoparticles using 5-80 cycles of atomic layer deposition (ALD). The photocatalytic activity of all samples was evaluated based on the degradation of methylene blue (MB) solution under UV light. The TiO2 sample with 45 cycles of ZrO2 deposition (45c-Zr/TiO2, 1.1 wt% ZrO2) was proved to be the most efficient catalyst with a degradation kinetic constant 10 times larger than that of the pure TiO2 sample. All samples were characterized using inductively coupled plasma atomic emission spectroscopy (ICP-AES), nitrogen adsorption-desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectra analysis (UV-DRS), Raman and photoluminescence (PL) techniques. The high photocatalytic activity of 45c-Zr/TiO2 can be attributed to stronger adsorption in the ultraviolet region and a reduction in the recombination rate of electron/hole pairs.
X. Wang et al., "Significant Improvement in TiO₂ Photocatalytic Activity through Controllable ZrO₂ Deposition," RSC Advances, vol. 8, no. 45, pp. 25829-25834, Royal Society of Chemistry, Jul 2018.
The definitive version is available at https://doi.org/10.1039/c8ra03423k
Chemical and Biochemical Engineering
Intelligent Systems Center
Keywords and Phrases
Aromatic Compounds; Atomic Emission Spectroscopy; Degradation; Gas Adsorption; High Resolution Transmission Electron Microscopy; Inductively Coupled Plasma; Nitrogen Plasma; Photocatalysis; Titanium Dioxide; Transmission Electron Microscopy; Zirconia; Anatase TiO2 Nanoparticles; Degradation Kinetics; Efficient Catalysts; High Photocatalytic Activities; Inductively Coupled Plasma Atomic Emission Spectroscopy; Nitrogen Adsorption Desorption; Photocatalytic Activities; UV-Vis Diffuse Reflectance Spectra; Atomic Layer Deposition
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01 Jul 2018