Investigation of the role of iron doping on the structural, optical and photoluminescence properties of sol–gel derived TiO 2 nanoparticles

Husain, Shahid; Alkhtaby, Lila A.; Giorgetti, E.; Zoppi, Angela; Miranda, Maurizio Muniz

doi:10.1016/j.jlumin.2015.12.002

Cited by 16 publications

(7 citation statements)

References 14 publications

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“…As the photoluminescence spectra is the result of recombination of generated electrons and holes, a lowering of overall PL intensity corresponds to the decrease in recombination rate and hence increase of photocatalytic activity of the layers. In fact, the reduction in the PL intensity could be attributed to the trapping of charge carriers by oxygen vacancies and Zr 4+ surface states, which facilitates the charge separation process and charge transfer to the surface by reducing mean free path of charge carriers [34,35]. We note that the layer prepared at A4 electrolyte and highest duty cycle reveals the lowest PL intensity, pointing that this layer should have a superior separation and longer lifetime of electrons and holes.…”

Section: Accepted M Manuscriptmentioning

confidence: 84%

Effect of duty cycle and electrolyte additive on photocatalytic performance of TiO2-ZrO2 composite layers prepared on CP Ti by micro arc oxidation method

Babaei

Dehghanian

Taheri

et al. 2016

Surface and Coatings Technology

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The aim of this work is to discuss the photocatalytic performance of the titania-zirconia porous photocatalyst layers synthesized via micro arc oxidation technique. An attempt was also made to put forward the basic formation mechanism of the layers. Impedance and optical properties of the photocatalyst layers were studied by electrochemical impedance spectroscopy (EIS), Photoluminescence spectroscopy and UV-vis absorption spectroscopy, in order to assess their intrinsic catalytic properties.The results of the EIS were correlated with the microstructural characteristics along with measurements of Methylene Blue (MB) photocatalytic degradation. The results show enhanced photocatalytic activity of TiO 2 -ZrO 2 composite layers compared to pure TiO 2 layer. It was revealed that the photocatalytic activity of the layers prepared at different duty cycles is influenced by characteristics of microdischarge regime imposed by working electrolytes with varying additive concentration. The results of photocatalytic degradation of methylene blue were in good agreement with those obtained from electrochemical analysis.

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Section: Accepted M Manuscriptmentioning

confidence: 84%

Effect of duty cycle and electrolyte additive on photocatalytic performance of TiO2-ZrO2 composite layers prepared on CP Ti by micro arc oxidation method

Babaei

Dehghanian

Taheri

et al. 2016

Surface and Coatings Technology

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“…The results showed that the higher the temperature, the lower the intensity of the photoluminescence, that is, with the increase of the temperature there is an increase in the structural order. As the photoluminescence signal is the result of a combination of excited electrons and holes, the lower intensity indicates the decrease in the rate of recombination and, thus a higher photocatalytic activity [35]. According to Pontes [15], this property is associated with the structural disorder of the inorganic phase, the photoluminescent spectrum is more intense when the material is subjected to longer thermal treatments (the carbon is eliminated without crystallization).…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic activity and photoluminescence properties of TiO2, In2O3, TiO2/In2O3 thin films multilayer

Garcia

Tavares

Neto

et al. 2018

J Mater Sci: Mater Electron

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This study evaluated the effect of crystallization temperature (300, 500 and 700 °C) on the photocatalytic and photoluminescent properties of the multilayer thin films of TiO 2 , In 2 O 3 and TiO 2 /In 2 O 3 which were prepared by the Complex Polymerization Method (CPM) and deposited on substrates of Si (100) by the spin coating method. The results of X-ray diffraction (XRD) revealed that there was no chemical interaction between the oxides (TiO 2 /In 2 O 3 ) in crystalline films. The morphology was observed by atomic force microscopy (AFM) with a mean grain size of 15-35 nm. The result showed that the photocatalytic property is significantly increased by increasing the crystallization temperature. This is due to the agitation of the molecules which facilitates the transfer of charge between the electron and the catalyst bore. UV-vis light absorption spectra indicated that the addition of In 2 O 3 in TiO 2 films is an effective way of increasing the uptake of TiO 2 in the visible region up to ~ 600 nm for photocatalytic applications, it was also possible to observe that these films could be easily Recycled for reuse. The samples were also characterized by photoluminescence, where it was possible to observe that the reduction of the PL intensity increased the photocatalytic activity of the thin films, with the increase of the crystallization temperature. In addition, the method used in this study is simple and economical compared to other methods.

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“…Figure 9 shows the UV visible absorption spectra of Zr 0.1 Al 1.9 Mo 2.9 V 0.1 O 12 at RT and corresponding calculated bandgap. The peak value of the UV absorption spectrum around 280 nm and the optical bandgap can be estimated with the UV absorption spectrum according to Tauc equation as follows: [36] (αhν)…”

Section: Thermal Expansion Characteristicmentioning

confidence: 99%

Low thermal expansion and broad band photoluminescence of Zr_0.1Al_1.9Mo_2.9V_0.1O₁₂ *

Wang¹,

Chen²,

Chen³

et al. 2021

Chinese Phys. B

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A new material of Zr0.1Al1.9Mo2.9V0.1O12 is synthesized by the traditional solid state synthesis method. The phase transition, coefficient of thermal expansion, and luminescence properties of Zr0.1Al1.9Mo2.9V0.1O12 are explored with Raman spectrometer, dilatometer, and x-ray diffraction (XRD) diffractometer. The results show that the Zr0.1Al1.9Mo2.9V0.1O12 possesses the strong broad-band luminescence characteristics almost in the whole visible region. The sample is crystallized in a monoclinic structure group of P21/a (No. 14) crystallized at room temperature (RT). The crystal is changed from monoclinic to orthorhombic structure when the temperature increases to 463 K. The material has very low thermal expansion performance in a wide temperature range. Its excellent low thermal expansion and strong pale green light properties in a wide temperature range suggest its potential applications in light-emitting diode (LED) and other optoelectronic devices.

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Investigation of the role of iron doping on the structural, optical and photoluminescence properties of sol–gel derived TiO 2 nanoparticles

Cited by 16 publications

References 14 publications

Effect of duty cycle and electrolyte additive on photocatalytic performance of TiO2-ZrO2 composite layers prepared on CP Ti by micro arc oxidation method

Effect of duty cycle and electrolyte additive on photocatalytic performance of TiO2-ZrO2 composite layers prepared on CP Ti by micro arc oxidation method

Photocatalytic activity and photoluminescence properties of TiO2, In2O3, TiO2/In2O3 thin films multilayer

Low thermal expansion and broad band photoluminescence of Zr_0.1Al_1.9Mo_2.9V_0.1O₁₂ *

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Investigation of the role of iron doping on the structural, optical and photoluminescence properties of sol–gel derived TiO 2 nanoparticles

Cited by 16 publications

References 14 publications

Effect of duty cycle and electrolyte additive on photocatalytic performance of TiO2-ZrO2 composite layers prepared on CP Ti by micro arc oxidation method

Effect of duty cycle and electrolyte additive on photocatalytic performance of TiO2-ZrO2 composite layers prepared on CP Ti by micro arc oxidation method

Photocatalytic activity and photoluminescence properties of TiO2, In2O3, TiO2/In2O3 thin films multilayer

Low thermal expansion and broad band photoluminescence of Zr0.1Al1.9Mo2.9V0.1O12 *

Contact Info

Product

Resources

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Low thermal expansion and broad band photoluminescence of Zr_0.1Al_1.9Mo_2.9V_0.1O₁₂ *