Synthesis and analysing the structural, optical, morphological, photocatalytic and magnetic properties of TiO2 and doped (Ni and Cu) TiO2 nanoparticles by sol–gel technique

Raguram, T.; Rajni, K S

doi:10.1007/s00339-019-2581-1

Cited by 76 publications

(34 citation statements)

References 64 publications

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“…(3) From the microstructural strain values it indicates the lattice defects due to the doping of Zn. Microstrain values remains constant even after the doping of Sn indicates the substitution of Sn ions by Zn ions in the crystal lattice [33]. Lattice constants are found as a=4.74 Å and c=3.19 Å for SnO2 and as a=8.66 Å for Zn:SnO2.…”

Section: Structural Analysismentioning

confidence: 89%

“…The average crystallite size was calculated for both the SnO2 and Zn:SnO2 nanoparticles and found to be 29 nm and 30 nm respectively. Debye-Scherrer formula was used to calculate the crystallite size, D= K λ/ βcos (2) Where, K is a constant(0.9), λ is the Cu-K (1.5418 Å) X-ray wavelength,  is the Diffracted angle in radians and β is the FWHM intensity in radians [22,33]. Increase in the average particle size confirms the doping of Zn in the SnO2 lattice, when the Zn is doped some of the Sn ions may be replaced or Zn occupies the intermediate position between Sn and O. Microstrain(Ɛ) is determined for both SnO2 and Zn:SnO2 from the formula, Ɛ= βcos/4…”

Section: Structural Analysismentioning

confidence: 99%

“…The change in lattice constant value was due to the addition of Zn in the SnO2 lattice which changes the tetragonal phased SnO2 to Cubical phased Zn:SnO2 [19,33].…”

Section: Structural Analysismentioning

confidence: 99%

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Synthesis of SnO2 and Zn doped SnO2 Nanoparticles by Flame Oxidation Process for Photocatalytic degradation of Methylene Blue Dye

P¹,

Kathirvel²,

Maruthamani³

et al. 2021

Preprint

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A very simple and rapid flame oxidation method is effectively used to synthesis pure Tin Oxide (SnO2) and Zinc doped Tin Oxide (Zn:SnO2) nanoparticles from the metallic Tin (Sn) and Zinc (Zn) powders for the photocatalytic degradation of Methylene blue (MB) dye and characterized to study their structural, optical, elemental and chemical properties. From the X-ray diffraction analysis (XRD) it indicates that the synthesized SnO2 and Zn:SnO2 nanoparticles have pure tetragonal and cubical phases respectively and their average size increases when Zn was doped with SnO2. Raman spectral studies confirms the various mode of vibrations and the crystal structure of the synthesized nanoparticles from the spectral peaks of Raman shifts. Purity, atomic percentage and chemical composition were analysed using Energy dispersive X-ray analysis (EDX). The band gap energy was increasing from 3.5 eV to 3.6 eV when doping of Zn with SnO2, which was revealed from the UV-visible spectroscopic analysis. Photoluminescence analysis (PL) confirms the red shifted emission for Zn:SnO2 due to the oxygen deficiency. The CIE chromaticity(x,y) for SnO2 and Zn:SnO2 was calculated from the emission spectra and the cordinates represents blue and violet region respectively. Field Emission Scanning Electron Microscopy (FESEM) analysis shows that the pure SnO2 nanoparticles have irregular, agglomerated, nanoflowered and nanoclustered formation whereas Zn:SnO2 nanoparticles have more crystalline, cubical and nanoflakes structures. The photocatalytic activity was enhanced due to the presence of Zn in SnO2 under UV light irradiation. The efficiency of MB degradation by SnO2 and Zn:SnO2 nanoparticles are above 80%, which proves to be an effective photocatalyst.

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Section: Structural Analysismentioning

confidence: 89%

Section: Structural Analysismentioning

confidence: 99%

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Synthesis of SnO2 and Zn doped SnO2 Nanoparticles by Flame Oxidation Process for Photocatalytic degradation of Methylene Blue Dye

P¹,

Kathirvel²,

Maruthamani³

et al. 2021

Preprint

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“…The FTIR spectra of the catalyst Ni-Mo/ TiO 2 -γ -Al 2 O 3 shows absorption band appeared in the region of (3400 -3510) cm -1 , for stretching vibrations of O−H group, and for bending appearing at 1627.8 cm -1 23 . It is observed a slight shift in the bands/ peaks position and change in the intensity of bands that may be due to the presence of the dopants (Mo, and Ni) in the interstitials of the lattices of the doped samples 24 .…”

Section: Fourier Transforms Infrared Spectroscopy (Ft-ir)mentioning

confidence: 95%

Synthesis and Characterization of New nano catalyst Mo-Ni /TiO2- γAl2O3 for Hydrodesulphurization of Iraqi Gas Oil

Ahmed¹,

Al-Abdaly

Hussein³

2021

Baghdad Sci.J

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A new nano-sized NiMo/TiO2-γ-Al2O3 was prepared as a Hydrodesulphurization catalyst for Iraqi gas oil with sulfur content of 8980 ppm, supplied from Al-Dura Refinery. Sol-gel method was used to prepare TiO2- γ-Al2O3 nano catalyst support with 64% TiO2, 32% Al2O3, Ni-Mo/TiO-γ-Al2O3 catalyst was prepared under vacuum impregnation conditions to loading metals with percentage 3.8 wt.% and 14 wt.% for nickel and molybdenum respectively while the percentage for alumina, and titanium became 21.7, and 58.61 respectively. The synthesized TiO2- γ-Al2O3 nanocomposites and Ni-Mo /TiO2- γ-Al2O3 Nano catalyst were then characterized by XRD, AFM, and BET surface area, SEM, XRF, and FTIR. The performance of the synthesized catalyst for removing sulfur compounds was conducted through the pilot HDS laboratory unit, various temperatures range 275oC to 375°C, LHSV 1 h-1 were studied; moreover, the effect of LHSV 1 to 4 h-1 on the percentage of sulfur removal was also studied at the temperature of the best removal with constant pressure 35 bar and H2/HC ratio 200cm3/200cm3. The sulfur content results generally revealed that there was a substantial decrease at all operating conditions used, while the maximum sulfur removal was 87.75% in gas oil on Ni-Mo/TiO2-γ-Al2O3 catalyst at temperature 375˚C and LHSV 1h-1.

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“…Nevertheless, the TM doping is deemed unstable and can introduce localized impurity states, which increase the recombination rate of photo-generated electron-hole pairs. [24][25][26] On the other hand, it has been found that the electronic and optical properties of TiO 2 have been remarkably regulated by doping C atoms. Owing to the presence of impurity states (C-2p states) in the band gap, the excitation energy of electrons in TiO 2 is greatly reduced, which is responsible for the red-shi of the optical absorption edge.…”

Section: Introductionmentioning

confidence: 99%

Sc/C codoping effect on the electronic and optical properties of the TiO₂ (101) surface: a first-principles study

Zeng

et al. 2021

RSC Adv.

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Synthesis and analysing the structural, optical, morphological, photocatalytic and magnetic properties of TiO2 and doped (Ni and Cu) TiO2 nanoparticles by sol–gel technique

Cited by 76 publications

References 64 publications

Synthesis of SnO2 and Zn doped SnO2 Nanoparticles by Flame Oxidation Process for Photocatalytic degradation of Methylene Blue Dye

Synthesis of SnO2 and Zn doped SnO2 Nanoparticles by Flame Oxidation Process for Photocatalytic degradation of Methylene Blue Dye

Synthesis and Characterization of New nano catalyst Mo-Ni /TiO2- γAl2O3 for Hydrodesulphurization of Iraqi Gas Oil

Sc/C codoping effect on the electronic and optical properties of the TiO₂ (101) surface: a first-principles study

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Synthesis and analysing the structural, optical, morphological, photocatalytic and magnetic properties of TiO2 and doped (Ni and Cu) TiO2 nanoparticles by sol–gel technique

Cited by 76 publications

References 64 publications

Synthesis of SnO2 and Zn doped SnO2 Nanoparticles by Flame Oxidation Process for Photocatalytic degradation of Methylene Blue Dye

Synthesis of SnO2 and Zn doped SnO2 Nanoparticles by Flame Oxidation Process for Photocatalytic degradation of Methylene Blue Dye

Synthesis and Characterization of New nano catalyst Mo-Ni /TiO2- γAl2O3 for Hydrodesulphurization of Iraqi Gas Oil

Sc/C codoping effect on the electronic and optical properties of the TiO2 (101) surface: a first-principles study

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Sc/C codoping effect on the electronic and optical properties of the TiO₂ (101) surface: a first-principles study