OPTICAL AND ELECTRICAL PROPERTIES OF Mn2+ DOPED TITANIUM OXIDE THIN FILMS

doi:10.7324/rjc.2017.1031746

Cited by 2 publications

(2 citation statements)

References 14 publications

(14 reference statements)

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“…Our band gap results for TiO 2 are comparable to those found in the literature, which are around 3.2 eV. [36][37][38] The band gap energy could be influenced by the sectorized presence of a remnant layer. This layer is in contact with the nanotubes of TiO 2 , creating a hetero-bonding of the semiconductor-semiconductor type, altering the energy values.…”

Section: Resultssupporting

confidence: 87%

Formation of Titanium Oxide Nanotube Arrays by Controlling H2o and Time Through Anodic Oxidation

Mateus¹,

Bautista-Ruiz²,

Barba-Ortega³

et al. 2019

RJC

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Maintaining a constant voltage the growth of titanium oxide (T iO 2 ) with a tubular geometry was studied. Therefore, the optimal parameters for the growth of TiO 2 were established using an organic electrolytic solution with a total volume of 150ml, composed of water/hydrofluoric acid/ammonium fluoride/ethylene glycol. The anodization conditions were varied, such as: time (60 -215 min), electric potential (5 -20 V), water content (0.0 -2.0 ml), and pH (4.8 -5.1). In this procedure, the conformation of long, open nanotubes with smooth walls was achieved, obtaining a maximum length of 1.90 µm for the nanotubes. However, in some samples before and after annealing a remnant layer can be seen that extends over some regions of the surface of the nanotubes. By means of the current density curves-time (J vs.t), we were able to specify the distinct growth zones of the nanotubes. The samples also were studied structurally by means of X-ray with thermal treatment (ambient−450 0 C). In addition, it was determined, via ultraviolet-visible (UV-Vis) spectroscopy, that the band gap energy varies (3.45 eV−3.03eV).

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Section: Resultssupporting

confidence: 87%

Formation of Titanium Oxide Nanotube Arrays by Controlling H2o and Time Through Anodic Oxidation

Mateus¹,

Bautista-Ruiz²,

Barba-Ortega³

et al. 2019

RJC

View full text Add to dashboard Cite

show abstract

“…This method increases in photocatalytic ability, however, some problems inhibit the efficiency of TiO2nanocarbon composites, such as weakening of light intensity on catalytic surfaces and lack of reproducibility in sample processing and preparation 6 . TiO2 Nanoparticles coating on the transparent plastic granules is conducted by varied electrostatic and heating technique for the photocatalytic degradation of organic pollutants in water 7,8 . The main drawback of TiO2 materials is their enormous energy band gap which is about 3.2 eV.It can be excited only under ultraviolet (UV) light, which has a wavelength of less than 387.5 nm and represents only 5% of the solar spectrum 9 .…”

Section: Introductionmentioning

confidence: 99%

A SIMPLEROUTE SYNTHESIS OF POLYCRYSTALLINE TiO2-Ag BY THE SONOCHEMICAL METHOD FOR PHOTOCATALYTIC DIRECT BLUE71 DEGRADATION

Sutanto¹,

Marhaendrajaya²,

Jaya³

et al. 2019

RJC

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In this paper, silver-doped titania (TiO2-Ag) powders have been synthesized with Ag variants using a simple sonochemical method. The prepared samples were identified using X-ray diffractometry (XRD) and scanning electron microscopy (SEM) to investigate the crystal structure and morphology, respectively. All samples showed the polycrystalline anatase phase and the plane exhibited the (101) dominant orientation. The smallest crystallite sample size of about 14.9 nm was obtained with a 3% Ag doping (TAg3). At higher Ag concentrations, the metal peaks could be detected at 44.3° and 64.4°. SEM images showed that all samples were agglomerated except the TAg3 sample with the lowest surface area of the active sites. Photocatalytic activity was carried out using Direct Blue 71 (DB71) as an organic pollutant. TAg4 exhibited the highest activity under ultraviolet (UV) irradiation with a degradation rate of 0.01 ppm/min. Results suggest that our TiO2-Ag photocatalyst performed well when prepared by a simple sonochemical method.

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OPTICAL AND ELECTRICAL PROPERTIES OF Mn2+ DOPED TITANIUM OXIDE THIN FILMS

Cited by 2 publications

References 14 publications

Formation of Titanium Oxide Nanotube Arrays by Controlling H2o and Time Through Anodic Oxidation

Formation of Titanium Oxide Nanotube Arrays by Controlling H2o and Time Through Anodic Oxidation

A SIMPLEROUTE SYNTHESIS OF POLYCRYSTALLINE TiO2-Ag BY THE SONOCHEMICAL METHOD FOR PHOTOCATALYTIC DIRECT BLUE71 DEGRADATION

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