Preparation and characterization of SnO2 doped TiO2 nanoparticles: Effect of phase changes on the photocatalytic and catalytic activity

Hassan, Shawky M.; Ahmed, Awad I.; Mannaa, Mohammed A.

doi:10.1016/j.jsamd.2019.06.004

Cited by 51 publications

(44 citation statements)

References 63 publications

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“…One of the greatest goals in the catalysis research is producing highly active, feasible, economically and environmentally harmless heterogeneous catalysts due to the urgent need to remove the use of harmful materials. [1][2][3] An example of this, liquid acid catalysts such as hydrouoric acid, phosphoric acid and sulfuric acid were used in a number of chemical processes. It has become necessary to replace the liquid acid catalysts with solid acid catalysts from an environmental protection point of view, [4][5][6] due to the corrosive properties of liquid acids.…”

Section: Introductionmentioning

confidence: 99%

The role of PMA in enhancing the surface acidity and catalytic activity of a bimetallic Cr–Mg-MOF and its applications for synthesis of coumarin and dihydropyrimidinone derivatives

et al. 2020

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Section: Introductionmentioning

confidence: 99%

The role of PMA in enhancing the surface acidity and catalytic activity of a bimetallic Cr–Mg-MOF and its applications for synthesis of coumarin and dihydropyrimidinone derivatives

et al. 2020

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“…Figure 9 (d) depicts the FTIR spectra of TiO 2 NPs obtained at the range of 4000–400 cm −1 . The absorption band among wavenumber variety 3450–3400 cm −1 is due to the stretched vibration of surface hydroxyl groups –OH [ 36 ]. The peaks revealed that the sample dried at 450 °C contains some absorbed water molecules, which disappear with an increased annealing temperature.…”

Section: Resultsmentioning

confidence: 99%

Effect of annealing temperature on structural, optical, and photocatalytic properties of titanium dioxide nanoparticles

Muthee

Dejene

2021

Heliyon

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Titanium dioxide (TiO 2 ) nanoparticles (NPs) were produced by simple sol-gel technique and annealed for 2 h in air. The impact of annealing temperature on the physical, morphological, photocatalytic, and optical properties was studied. X-ray diffraction (XRD) measurements proved that a gradual phase change from anatase to rutile occurred with increased annealing temperature. The crystal structures of the NPs were found to change at different temperatures; anatase phase at 450 °C, mixed-phase (anatase/Rutile) at 550–650 °C, and rutile phase at 750 °C. The rise in the annealing temperature improved the crystallinity of the NPs. The crystal and grain size of the NPs increased with the annealing temperature hence reducing the specific surface area due to the condensed boundaries between subunits of the NPs. As per the Kubelka-Munk equation, the bandgap reduced as the temperature elevated. The photocatalytic activity of the NPs was higher in the anatase/rutile mixed-phase than in the single anatase and rutile phase. Experimental results indicated that annealing temperature could effectively change the properties of the TiO 2 NPs.

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“…The recombination probability for prepared photocatalyst was characterized by photoluminescence spectroscopy. Figure 7 shows that 385 nm 400 nm were assigned to the band to band PL emission which was created by incident light energy which is approximately equal to that of band gap of the rutile phases of TiO 2 respectively [56,57]. The excitonic peak at 436 nm is assigned to defect in TiO 2 nanoparticles [58].…”

Section: Resultsmentioning

confidence: 97%

Investigation of metal doped mesoporous TiO2 nanostructures for environmental remediation

Santhi¹,

Harish²,

Navaneethan³

et al. 2021

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In the recent past, metal oxides have attracted the researchers because of their applications in energy and environmental application domains. In the present work, hydrothermal technique used to prepared the Sn doped TiO2 nanoparticles and the effect of Sn concentration has been investigated. The structural, morphological, surface composition, optical and photocatalytic behavior were studied. XRD pattern revealed that doping of Sn makes easy transformation of rutile from anatase phase at lower temperature, providing tetragonal structure of rutile of TiO2. TEM analysis showed the formation of nanoparticles with spherical like morphology with good crystallinity. UV-Vis spectra, it is observed that optical absorption edge gets red shifted upon Sn doping and the band gap is found to be 2.6 eV. The photocatalytic activity of the synthesized nanoparticles has been investigated under visible light irradiation. Experimental results suggested that 0.5 wt % of Sn doped nanoparticles have shown to exhibit improved photocatalytic properties.

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Preparation and characterization of SnO2 doped TiO2 nanoparticles: Effect of phase changes on the photocatalytic and catalytic activity

Cited by 51 publications

References 63 publications

The role of PMA in enhancing the surface acidity and catalytic activity of a bimetallic Cr–Mg-MOF and its applications for synthesis of coumarin and dihydropyrimidinone derivatives

The role of PMA in enhancing the surface acidity and catalytic activity of a bimetallic Cr–Mg-MOF and its applications for synthesis of coumarin and dihydropyrimidinone derivatives

Effect of annealing temperature on structural, optical, and photocatalytic properties of titanium dioxide nanoparticles

Investigation of metal doped mesoporous TiO2 nanostructures for environmental remediation

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