Effects of Anodic Aluminum Oxide Substrate Pore Geometry on the Gas-Phase Photocatalytic Activity of ZnO/Al2O3 Composites Prepared by Atomic Layer Deposition
We report on the photocatalytic activity of ZnO layers deposited by atomic layer deposition on a porous anodic aluminum oxide substrate with hexagonal pore symmetry and varied pore dimensions. ZnO/Al2O3 composites were prepared with pore diameters in the range 93-134 nm and interpore distance in the...
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| Veröffentlicht in: | Symmetry (Basel) 2021-08, Vol.13 (8), p.1456, Article 1456 |
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| creator | Stefanov, Bozhidar I. Blagoev, Blagoy S. osterlund, Lars Tzaneva, Boriana R. Angelov, George V. |
| description | We report on the photocatalytic activity of ZnO layers deposited by atomic layer deposition on a porous anodic aluminum oxide substrate with hexagonal pore symmetry and varied pore dimensions. ZnO/Al2O3 composites were prepared with pore diameters in the range 93-134 nm and interpore distance in the range 185-286 nm, and their photocatalytic activity was measured for gas-phase photocatalytic oxidation of acetaldehyde at varying UV illumination intensities (0.08-3.94 mW cm(-2)). The results show that substrates with narrower pore diameters ( |
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ZnO/Al2O3 composites were prepared with pore diameters in the range 93-134 nm and interpore distance in the range 185-286 nm, and their photocatalytic activity was measured for gas-phase photocatalytic oxidation of acetaldehyde at varying UV illumination intensities (0.08-3.94 mW cm(-2)). The results show that substrates with narrower pore diameters (<115 nm, in the case of this study) have a detrimental effect on the photocatalyst performance, despite their higher effective surface. The results are explained on the basis of limited mass transfer inside the porous structure and can be used as a guideline in the purposeful design of photocatalysts with a nanoporous or nanotubular structure.</description><identifier>ISSN: 2073-8994</identifier><identifier>EISSN: 2073-8994</identifier><identifier>DOI: 10.3390/sym13081456</identifier><language>eng</language><publisher>BASEL: Mdpi</publisher><subject>Acetaldehyde ; Aluminum oxide ; anodic aluminum oxide ; Atomic layer epitaxy ; Catalytic activity ; Composite materials ; Diameters ; Electrolytes ; Experiments ; Mass transfer ; Morphology ; Multidisciplinary Sciences ; Oxidation ; Photocatalysis ; Photocatalysts ; photocatalytic activity ; Scanning electron microscopy ; Science & Technology ; Science & Technology - Other Topics ; Software ; Substrates ; Zinc oxide</subject><ispartof>Symmetry (Basel), 2021-08, Vol.13 (8), p.1456, Article 1456</ispartof><rights>2021 by the authors. Licensee MDPI, Basel, Switzerland. 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| subjects | Acetaldehyde Aluminum oxide anodic aluminum oxide Atomic layer epitaxy Catalytic activity Composite materials Diameters Electrolytes Experiments Mass transfer Morphology Multidisciplinary Sciences Oxidation Photocatalysis Photocatalysts photocatalytic activity Scanning electron microscopy Science & Technology Science & Technology - Other Topics Software Substrates Zinc oxide |
| title | Effects of Anodic Aluminum Oxide Substrate Pore Geometry on the Gas-Phase Photocatalytic Activity of ZnO/Al2O3 Composites Prepared by Atomic Layer Deposition |
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