Effects of Ni-doping on the photo-catalytic activity of TiO2 anatase and rutile: Simulation and experiment

Elahifard, Mohammad Reza; Ahmadvand, Seyedsaeid; Mirzanejad, Amir

doi:10.1016/j.mssp.2018.05.001

Cited by 34 publications

(11 citation statements)

References 47 publications

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“…The reason for this enhancement has been tentatively ascribed to the suppression of electron-hole pair recombination on the surface of the TiO 2 catalyst by low valence Ni 2+ ions [34]. This upgraded activity was recognized as the enhanced separation of photo-generated electron-hole pairs due to the presence of Ni 2+ ions in TiO 2 [35]. Sulfur was selected as a nonmetal dopant because it has long been investigated as an effective nonmetal dopant for the improvement of the visible light response of TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

Kunnamareddy¹,

Rajendran

Megala

et al. 2021

J Inorg Organomet Polym

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In this work, Nickel (Ni) and sulfur (S) codoped TiO2 nanoparticles were prepared by a sol-gel technique. The as-prepared catalyst was characterized using X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), FT-Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectra (DRS) for investigating crystal structure, crystal phase, particle size and bandgap energy of these samples. The photocatalytic performances of all the prepared catalysts have been investigated for the degradation of methylene blue (MB) under visible light irradiation. It was noticed that Ni-S codoped TiO2(Ni-S/TiO2) nanoparticles exhibited much higher photocatalytic activity compared with pure, Ni and S doped TiO2 due to higher visible light absorption and probable decrease in the recombination of photo-generated charges. It was decided that the great visible light absorption was created for codoped TiO2 by the formation of impurity energy states near both the edges of the collection, which works as trapping sites for both the photogenerated charges to decrease the recombination process.

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Section: Introductionmentioning

confidence: 99%

Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

Kunnamareddy¹,

Rajendran

Megala

et al. 2021

J Inorg Organomet Polym

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“…DFT methods, using projector-augmented waves (PAWs), have been successfully used in predicting the physical properties of solid materials [41][42][43][44][45]. Herein, a periodic slab model of 2 × 5 surface unit cells of Al (100) with five layers of 10 atoms, for a total of 50 atoms, was considered, and the vacuum was set to 30 Å.…”

Section: Computational Detailsmentioning

confidence: 99%

Predictive Modeling of Corrosion in Al/Mg Dissimilar Joint

et al. 2019

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In the absence of any abnormality (standard conditions), the gradient of any mechanical/thermodynamic stress would be intensified at the dissimilar joint due to an abrupt change in the chemical composition. This paper aims to investigate the effect of delocalizing this stress by imposing an optimum chemical gradient within the dissimilar joint. In this work, we computationally demonstrated that a homogenous distribution of magnesium atoms in the aluminum (100) structure with a specific chemical gradient could potentially reduce the susceptibility of the Mg/Al dissimilar joint towards micro-galvanic corrosion. This is achieved through the minimization of the work function gradient within the dissimilar joint.

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“…Thus, the rate of photocatalytic activity of TiO 2 is limited to the recombination rate of photoproduced electron-hole. To enhance the utilization of solar light for photocatalytic and to reduce electron-hole recombination, TiO 2 is modified by various metallic species and coupling with other semi-conductors [12,13] Many photocatalys is studies have been published using TiO 2 and doped TiO 2 as heterogeneous catalysts for the degradation of various organic pollutants [14,15,23].…”

Section: Introductionmentioning

confidence: 99%

Degradation of Malachite green using heterogeneous nanophotocatalysts (NiO/TiO2, CuO/TiO2) under solar and microwave irradiation

et al. 2021

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Heterogeneous photocatalysis is an advanced oxidation process (AOP). This technique is used to degrade a wide range of pollutants in water. In this study, photocatalytic oxidation and mineralization of malachite green in an aqueous suspension containing nickel-based catalysts and copper supported on TiO2 prepared by wet diffusional impregnation was studied using two sources of irradiation: solar and microwave. Photodegradation kinetics were studied according to several parameters, such as catalyst type, dye concentration, photocatalyst mass and microwave power. The results showed that the photodegradation of malachite green is faster in the presence of CuO/TiO2 catalyst than NiO/TiO2 catalyst than TiO2. Dye degradation by microwave irradiation is faster than that by solar irradiation.

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Effects of Ni-doping on the photo-catalytic activity of TiO2 anatase and rutile: Simulation and experiment

Cited by 34 publications

References 47 publications

Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

Predictive Modeling of Corrosion in Al/Mg Dissimilar Joint

Degradation of Malachite green using heterogeneous nanophotocatalysts (NiO/TiO2, CuO/TiO2) under solar and microwave irradiation

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