INFLUENCE OF THERMAL TREATMENT ON THE PHOTOCATALYST NANOCOMPOSITE ZnO/TiO<sub>2</sub>

Sansiviero, Maria T. C.; Faria, Dalva Lúcia Araújo de

doi:10.5935/0100-4042.20140267

Cited by 5 publications

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“…71-1169. The anatase structure of the nanocrystals is confirmed by the diffraction peaks at an angle 2θ = 25.2º [24][25][26]. The results of X-ray diffraction for TiO 2 and Mn 2 O 3 are in good agreement with the values of the literature already reported [27].…”

Section: Resultssupporting

confidence: 82%

Removal study of the hormone17 alpha-ethynylestradiol and methylene blue dye from water using TiO2, Mn2O3 and TiO2/Mn2O3 thin films

Rezende

Garcia

Ferreira

et al. 2020

J Mater Sci: Mater Electron

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The disposal of pollutants in the surface, underground, and public water supply is an important problem, which is why it is necessary to study more efficient photocatalysts in the treatment of wastewater. In this context, thin films of TiO 2 , Mn 2 O 3 and TiO 2 /Mn 2 O 3 were prepared by the hydrolysis of precursors in the presence of citric acid and ethylene glycol, to evaluate the photocatalytic performance in the degradation of methylene blue dye and the hormone 17a-ethinylestradiol (EE2), the measurements were repeated 10 times in a period of 300 min. Thin films were deposited by spin-coating on Si (100) substrates and calcined at 500 °C and 600 °C for 2 h. Nanocomposites were characterized by X-ray diffraction, atomic force microscopy, scanning electron microscopy, UV-visible spectroscopy, photocatalytic activity, and photoluminescence. X-ray diffraction results revealed that no other phase was formed besides anatase and bixbite, indicating that there was no chemical interaction between the TiO 2 and Mn 2 O 3 layers. The results show the degradation values of methylene blue in approximately 57% and for the 17a-ethinylestradiol a degradation around 82%, showing that the studied photocatalysts are promising, mainly for the degradation of 17a-ethinylestradiol.

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Section: Resultssupporting

confidence: 82%

Removal study of the hormone17 alpha-ethynylestradiol and methylene blue dye from water using TiO2, Mn2O3 and TiO2/Mn2O3 thin films

Rezende

Garcia

Ferreira

et al. 2020

J Mater Sci: Mater Electron

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“…According to Fig. 1, it is possible to identify the characteristic peaks of the photo phase of TiO 2 (anatase) at 25.2°; 37.8°; 48.2°; 53.8° e 55.0° corresponding respectively to the plans (101), (004), (200), (105), e (211); some rutile diffraction peaks are still observed, the main one being 2θ = 27.4° which corresponds to the plane (110), according to JCPDS (Code 21-1272) 28 . Moreover, the silver nitrate X-ray diffraction pattern (AgNO 3 ) showed the characteristic peaks, with their respective crystalline planes, at 30.2° (001), 35 Table 2.…”

Section: Effect Of the Photolysis And Adsorption On Thementioning

confidence: 95%

Iron oxide nanocatalyst with titanium and silver nanoparticles: Synthesis, characterization and photocatalytic activity on the degradation of Rhodamine B dye

Muraro

Mortari

Vizzotto

et al. 2020

Sci Rep

120

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nowadays, there is a growing concern about the environmental impacts of colored wastewater. thus, the present work aims the synthesis, characterization and determination of photocatalytic activity of iron oxide (fe 2 o 3) nanocatalyst, evaluating the effect of hybridization with titanium (TiNPs-Fe 2 o 3) and silver (AgNPs-Fe 2 o 3) nanoparticles, on the degradation of Rhodamine B dye (RhB). nanocatalysts were characterized by XRD, SeM, teM, ftiR, n 2 porosimetry (Bet/BJH method), zeta potential and DRS. photocatalytic tests were performed in a slurry reactor, with the nanocatalyst in suspension, using RhB as a target molecule, under ultraviolet (UV) and visible radiation. therefore, the photocatalytic activity of the nanocatalysts (non-doped and hybridized) was evaluated in these ideal conditions, where the AgNPs-Fe 2 o 3 sample showed the best photocatalytic activity with a degradation of 94.1% (k = 0.0222 min −1 , under UV) and 58.36% (k = 0.007 min −1 , under visible), while under the same conditions, the tio 2-P25 commercial catalyst showed a degradation of 61.5% (k = 0.0078 min −1) and 44.5% (k = 0.0044 min −1), respectively. According with the ideal conditions determined, reusability of the AgNPs-Fe 2 o 3 nanocatalyst was measured, showing a short reduction (about 8%) of its photocatalytic activity after 5 cycles. Thus, the Fe 2 o 3 nanocatalyst can be considered a promising catalyst in the heterogeneous photocatalysis for application in the degradation of organic dyes in aqueous solution.

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“…The Er 3+ or Y 3+ doped TiO 2 samples also exhibited a mass loss between 250-450 C, ascribed to the combustion of nonhydrolyzed isopropoxide binders and other organic substances bound to the titania particles and to the thermal decomposition of yttrium nitrate 23 or erbium nitrate, 24 as shown in Fig. 1a.…”

Section: Resultsmentioning

confidence: 98%

Structural, optical and photocatalytic properties of erbium (Er³⁺) and yttrium (Y³⁺) doped TiO₂ thin films with remarkable self-cleaning super-hydrophilic properties

et al. 2020

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INFLUENCE OF THERMAL TREATMENT ON THE PHOTOCATALYST NANOCOMPOSITE ZnO/TiO₂

Cited by 5 publications

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Removal study of the hormone17 alpha-ethynylestradiol and methylene blue dye from water using TiO2, Mn2O3 and TiO2/Mn2O3 thin films

Removal study of the hormone17 alpha-ethynylestradiol and methylene blue dye from water using TiO2, Mn2O3 and TiO2/Mn2O3 thin films

Iron oxide nanocatalyst with titanium and silver nanoparticles: Synthesis, characterization and photocatalytic activity on the degradation of Rhodamine B dye

Structural, optical and photocatalytic properties of erbium (Er³⁺) and yttrium (Y³⁺) doped TiO₂ thin films with remarkable self-cleaning super-hydrophilic properties

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INFLUENCE OF THERMAL TREATMENT ON THE PHOTOCATALYST NANOCOMPOSITE ZnO/TiO2

Cited by 5 publications

References 0 publications

Removal study of the hormone17 alpha-ethynylestradiol and methylene blue dye from water using TiO2, Mn2O3 and TiO2/Mn2O3 thin films

Removal study of the hormone17 alpha-ethynylestradiol and methylene blue dye from water using TiO2, Mn2O3 and TiO2/Mn2O3 thin films

Iron oxide nanocatalyst with titanium and silver nanoparticles: Synthesis, characterization and photocatalytic activity on the degradation of Rhodamine B dye

Structural, optical and photocatalytic properties of erbium (Er3+) and yttrium (Y3+) doped TiO2 thin films with remarkable self-cleaning super-hydrophilic properties

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INFLUENCE OF THERMAL TREATMENT ON THE PHOTOCATALYST NANOCOMPOSITE ZnO/TiO₂

Structural, optical and photocatalytic properties of erbium (Er³⁺) and yttrium (Y³⁺) doped TiO₂ thin films with remarkable self-cleaning super-hydrophilic properties