Optical and photocatalytic properties of composite TiO2/ZnO thin films

Giannakopoulou, T.; Todorova, N.; Giannouri, M.; Wang, Yuanyuan; Trapalis, C.

doi:10.1016/j.cattod.2013.10.003

Cited by 59 publications

(26 citation statements)

References 39 publications

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“…6 Their photocatalytic properties can be enhanced through band gap tuning, 4,7,8 nanostructured morphology maneuvering, 9 and formation of composites with other materials. [10][11][12] Recently, complex compounds, such as K 3 B 6 O 10 Br 13 and ZnBiSbO 4 , 14 have emerged as effective alternative photocatalysts, although they are difficult to prepare and study. However, to date, most studies have emphasized the use of a single functional property of materials for various applications.…”

Section: Introductionmentioning

confidence: 99%

Study of ZnSnO₃-Nanowire Piezophotocatalyst Using Two-Step Hydrothermal Synthesis

Lo¹,

Lee²,

Chang

2015

J. Phys. Chem. C

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This paper presents the report on the piezophotocatalysis of single-crystal rhombohedral ZnSnO 3 nanowires. An essential feature of this study was the close coupling of the functions of piezophototronics (semiconductors, piezoelectricity, and photonics) and photocatalysis for achieving synergistic catalytic performance. Vertically aligned lead-free noncentrosymmetric high purity ZnSnO 3 nanowires (LiNbO 3 -type, R3c) were fabricated using a two-step hydrothermal reaction. The piezophototronic effect was demonstrated to substantially enhance the photocatalytic activity (by approximately 27%) by modulating the piezopotentials across the ZnSnO 3 nanowires. The enhancement was attributed to reduced recombination of photogenerated electron-hole pairs and enhanced mobility of these pairs resulting from the energy band distortion caused by applied stresses.

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Section: Introductionmentioning

confidence: 99%

Study of ZnSnO₃-Nanowire Piezophotocatalyst Using Two-Step Hydrothermal Synthesis

Lo¹,

Lee²,

Chang

2015

J. Phys. Chem. C

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“…metal oxides) of different materials each layer having its specific thicknesses on the nanometer scale. These multilayered structures demonstrate unique properties such as high dielectric constants 1-3 and advanced mechanical 4-6 , electrical [7][8][9] and optical [10][11][12] properties.…”

Section: Introductionmentioning

confidence: 99%

Study on Structural, Mechanical, and Optical Properties of Al₂O₃–TiO₂ Nanolaminates Prepared by Atomic Layer Deposition

Iatsunskyi¹,

Coy²,

Viter

et al. 2015

J. Phys. Chem. C

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Structural, optical and mechanical properties of Al 2 O 3 /TiO 2 nanolaminates fabricated by atomic layer deposition (ALD) were investigated. We performed transmission electron microscopy (TEM), X-ray diffraction (XRD), X-Ray reflectivity (XRR), energy dispersive X-ray spectroscopy (EDX), ellipsometry, UV-Vis spectroscopy, photoluminescence (PL) spectroscopy and nanointendation to characterize the Al 2 O 3 /TiO 2 nanolaminates. The main structural, optical and mechanical parameters of Al 2 O 3 /TiO 2 nanolaminates (thickness, grain size, refractive index, extinction coefficient, band gap, hardness, and Young module) were calculated. It was established that with decreasing of the layer thickness, the value of band gap energy increases due to the quantum size effect related to the reduction of the nanograins size. On the other hand, the decreasing of nanograins size leads to generation of interface defects, and, as a consequence, to the increasing of Urbach energy. It was also shown that there is an interdiffusion layer at the Al 2 O 3 -TiO 2 interface, which plays a crucial role in explaining mechanical and optical properties of Al 2 O 3 /TiO 2 nanolaminates. Correlation between structural, optical and mechanical parameters was discussed.

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“…The excellent photocatalytic property of TiO 2 is due to its wide band gap and long lifetime of photogenerated holes and electrons [3][4]. It has been reported that the deposition of ZnO or TiO 2 thin films on Si substrates at elevated temperature leads to increase in oxygen vacancies as the surface Si atoms easily capture oxygen atom from ZnO or TiO 2 , which deteriorates the quality of the these films [5][6]. So it is required to improve various properties of ZnO and TiO 2 films for their potential M a n u s c r i p t applications.…”

Section: Introductionmentioning

confidence: 99%

Structural and optical properties of pulsed laser deposited ZnO/TiO2 and TiO2/ZnO thin films

Jain

Salim

Kaur

2015

Optik

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Optical and photocatalytic properties of composite TiO2/ZnO thin films

Cited by 59 publications

References 39 publications

Study of ZnSnO₃-Nanowire Piezophotocatalyst Using Two-Step Hydrothermal Synthesis

Study of ZnSnO₃-Nanowire Piezophotocatalyst Using Two-Step Hydrothermal Synthesis

Study on Structural, Mechanical, and Optical Properties of Al₂O₃–TiO₂ Nanolaminates Prepared by Atomic Layer Deposition

Structural and optical properties of pulsed laser deposited ZnO/TiO2 and TiO2/ZnO thin films

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Optical and photocatalytic properties of composite TiO2/ZnO thin films

Cited by 59 publications

References 39 publications

Study of ZnSnO3-Nanowire Piezophotocatalyst Using Two-Step Hydrothermal Synthesis

Study of ZnSnO3-Nanowire Piezophotocatalyst Using Two-Step Hydrothermal Synthesis

Study on Structural, Mechanical, and Optical Properties of Al2O3–TiO2 Nanolaminates Prepared by Atomic Layer Deposition

Structural and optical properties of pulsed laser deposited ZnO/TiO2 and TiO2/ZnO thin films

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Study of ZnSnO₃-Nanowire Piezophotocatalyst Using Two-Step Hydrothermal Synthesis

Study of ZnSnO₃-Nanowire Piezophotocatalyst Using Two-Step Hydrothermal Synthesis

Study on Structural, Mechanical, and Optical Properties of Al₂O₃–TiO₂ Nanolaminates Prepared by Atomic Layer Deposition