Optical properties of nanostructured ZnO crystal synthesized by pulsed-laser ablation

Sakai, Kentaro; Oyama, Satoshi; Noguchi, Kohei; Fukuyama, Atsuhiko; Ikari, Tetsuo; Okada, Tatsuo

doi:10.1016/j.physe.2007.09.006

Cited by 14 publications

(13 citation statements)

References 13 publications

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“…SPV spectroscopy is a good tool for studying photogenerated charge carriers in nanostructured materials. It can detect an optical absorption spectrum by the illumination-induced change in the surface potential due to the drift, accumulation, and recombination of photogenerated carriers . Figure shows the SPV spectra of TiO 2 −Pt/Ti, TiO 2 /Ti, and Pt/Ti.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of TiO₂−Pt Coaxial Nanotube Array Schottky Structures for Enhanced Photocatalytic Degradation of Phenol in Aqueous Solution

et al. 2008

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Well-aligned TiO2−Pt coaxial nanotube array schottky structures on Ti substrate (TiO2−Pt/Ti) were successfully fabricated by direct current (DC) electrodeposition using anodic aluminum oxide (AAO) templates and the subsequent atmospheric pressure chemical vapor deposition (APCVD) technique. Environmental scanning electron microscopy (ESEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), energy-dispersive X-ray spectra (EDX), and X-ray diffraction patterns (XRD) indicated that the as-prepared samples were a vertically well-aligned TiO2−Pt coaxial nanotube array, and the outer TiO2 nanotube was anatase with the preferential orientation of (101) plane. The asymmetry of the current−voltage (I –V) curve revealed that a schottky barrier had been formed between TiO2 and Pt. The enhanced separation of photogenerated holes and electrons was demonstrated by surface photovoltage (SPV) and photocurrent measurement. For the degradation of phenol under UV light irradiation, the TiO2−Pt coaxial nanotube array exhibited a much higher photocatalytic efficiency (up to 87%) than did the TiO2 nanotube array, and the kinetic constant of it was 2.3 times as great as that of the TiO2 nanotube array.

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Section: Resultsmentioning

confidence: 99%

Fabrication of TiO₂−Pt Coaxial Nanotube Array Schottky Structures for Enhanced Photocatalytic Degradation of Phenol in Aqueous Solution

et al. 2008

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“…SPV can detect the illumination-induced change in the surface potential due to drift, accumulation and recombination of the photogenerated carriers in nanostructured materials. 39 Fig. 6a shows the SPV spectra of the ZnAl 2 O 4 and Ag-doped ZnAl 2 O 4 samples.…”

Section: Paper Catalysis Science and Technologymentioning

confidence: 99%

Photocatalytic performances and activities in Ag-doped ZnAl₂O₄nanorods studied by FTIR spectroscopy

Zhu

Zhao

et al. 2013

Catal. Sci. Technol.

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“…We have successfully grown nondoped ZnO nanowires by a newly developed nanoparticle-assisted pulsedlaser deposition (NAPLD) technique that does not require the use of any catalyst [6][7][8][9]. And we also found and demonstrated that these crystals had good crystallinity from low-temperature photoluminescence (PL) measurements [10,11].…”

Section: Introductionmentioning

confidence: 95%

Low-temperature photoluminescence of phosphorous-doped ZnO nanowires synthesized by nanoparticle-assisted pulsed-laser deposition

Sakai

Fukuyama

Ikari

et al. 2010

TENCON 2010 - 2010 IEEE Region 10 Conference

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Phosphorpus-doped ZnO nanowires were synthesized by our newly developed nanoparticle-assisted pulsed-laser deposition (NAPLD) technique under various growth conditions. This NAPLD technique, which does not require a catalyst for crystal growth, is expected to synthesize high-quality nanostructured ZnO crystals. The luminescence properties were investigated by a photoluminescence (PL) spectroscopy, and the ultraviolet luminescence band (UVL) was observed at lowtemperature. This UVL band consists of several sharp emission lines due to free excitonsb (FX), donor-bound excitons, acceptorbound excitons, donor-acceptor pair (DAP) transitions, and their longitudinal-optical (LO) phonon replicas. We discuss the influence of the growth conditions on the luminescence properties.Phosphorous-doped ZnO; Nanowire; Pulsed-laser deposition; Photoluminescence; Scannninng electron microscope; Energy dispersive X-ray analyzer

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Optical properties of nanostructured ZnO crystal synthesized by pulsed-laser ablation

Cited by 14 publications

References 13 publications

Fabrication of TiO₂−Pt Coaxial Nanotube Array Schottky Structures for Enhanced Photocatalytic Degradation of Phenol in Aqueous Solution

Fabrication of TiO₂−Pt Coaxial Nanotube Array Schottky Structures for Enhanced Photocatalytic Degradation of Phenol in Aqueous Solution

Photocatalytic performances and activities in Ag-doped ZnAl₂O₄nanorods studied by FTIR spectroscopy

Low-temperature photoluminescence of phosphorous-doped ZnO nanowires synthesized by nanoparticle-assisted pulsed-laser deposition

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Optical properties of nanostructured ZnO crystal synthesized by pulsed-laser ablation

Cited by 14 publications

References 13 publications

Fabrication of TiO2−Pt Coaxial Nanotube Array Schottky Structures for Enhanced Photocatalytic Degradation of Phenol in Aqueous Solution

Fabrication of TiO2−Pt Coaxial Nanotube Array Schottky Structures for Enhanced Photocatalytic Degradation of Phenol in Aqueous Solution

Photocatalytic performances and activities in Ag-doped ZnAl2O4nanorods studied by FTIR spectroscopy

Low-temperature photoluminescence of phosphorous-doped ZnO nanowires synthesized by nanoparticle-assisted pulsed-laser deposition

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Fabrication of TiO₂−Pt Coaxial Nanotube Array Schottky Structures for Enhanced Photocatalytic Degradation of Phenol in Aqueous Solution

Fabrication of TiO₂−Pt Coaxial Nanotube Array Schottky Structures for Enhanced Photocatalytic Degradation of Phenol in Aqueous Solution

Photocatalytic performances and activities in Ag-doped ZnAl₂O₄nanorods studied by FTIR spectroscopy