Preparation of gold-modified F,N-TiO2 visible light photocatalysts and their structural features comparative analysis

Shabalina, Anastasiia V.; Fakhrutdinova, Elena D.; Chen, Yu Wen; Лапин, И. Н.

doi:10.1007/s10971-015-3732-2

Cited by 4 publications

(4 citation statements)

References 21 publications

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“…11 F and N introduced during synthesis affect the photocatalytic properties of the samples. 15 Figure 2 presents diagrams of pore size distribution and the N adsorption-desorption isotherm, and Table 1 presents the values of specific surface area and porosity for the synthesised materials.…”

Section: Resultsmentioning

confidence: 99%

“…5 We earlier developed a synthesis technique that allows the production of nanosized materials consisting of one polymorph -anatase -that is catalytically active. [11][12][13][14] The produced TiO 2 material was co-doped with the non-metals F and N. 15 Co-doping of TiO 2 with F and N is advantageous, as these dopants can act as a donor-acceptor pair. [16][17][18] At the same time, the number of intrinsic defects in TiO 2 decreases, which leads to a reduction in the concentration of electron-hole pair recombination centres, which in turn enhances the photocatalytic properties of the material.…”

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confidence: 99%

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Effect of N and F content on structural, optical and photocatalytic methylene blue degradation properties of TiO₂

Fakhrutdinova

Shabalina

Svetlichnyi

et al. 2016

Journal of Chemical Research

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Photocatalytic systems based on fluorine- and nitrogen-doped titanium dioxide were obtained via the sol–gel method. Titanium tetraisopropoxide and ammonium fluoride were used as precursors. Transmission electron microscopy and measurement of Brunauer–Emmett–Teller surface area and porosity were used to establish that the concentration of ammonium fluoride has an impact on the structural parameters of titanium dioxide produced in the sol–gel process. X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy revealed that the dopants (F and N) are not incorporated into the crystal lattice of titanium dioxide, but affect the optical properties of titanium dioxide due to the emergence of additional bands in the absorption spectra in the range of 380–450 nm. Sorption and photoactivity were found using methylene blue photodecomposition under visible light. It was found that dopant introduction increases both sorption ability and photoactivity of the materials.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Effect of N and F content on structural, optical and photocatalytic methylene blue degradation properties of TiO₂

Fakhrutdinova

Shabalina

Svetlichnyi

et al. 2016

Journal of Chemical Research

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“…Thus, the large band gap of ~3.2 eV does not allow the visible range of the spectrum to be used for photocatalysis. This challenge can be solved, e.g., by doping TiO 2 with metals [ 6 , 7 , 8 , 9 ] and nonmetals [ 10 , 11 ], by creating TiO 2 -based composites [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Laser-Based Synthesis of TiO2-Pt Photocatalysts for Hydrogen Generation

et al. 2022

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The development of visible-light active titanium dioxide is one of the key challenges in photocatalysis that stimulates the development of TiO2-based composite materials and methods for their synthesis. Here, we report the use of pristine and Pt-modified dark titanium dioxide prepared via pulsed laser ablation in liquid (Nd:YAG laser, 1064 nm, 7 ns) for photocatalytic hydrogen evolution from alcohol aqueous solutions. The structure, textural, optical, photoelectrochemical, and electrochemical properties of the materials are studied by a complex of methods including X-ray diffraction, low-temperature nitrogen adsorption, electrophoretic light scattering, diffuse reflection spectroscopy, photoelectrochemical testing, and electrochemical impedance spectroscopy. Both the thermal treatment effect and the effect of modification with platinum on photocatalytic properties of dark titania materials are studied. Optimal compositions and experimental conditions are selected, and high photocatalytic efficiency of the samples in the hydrogen evolution reaction (apparent quantum yield of H2 up to 0.38) is demonstrated when irradiated with soft UV and blue LED, i.e., 375 and 410 nm. The positive effect of low platinum concentrations on the increase in the catalytic activity of dark titania is explained.

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“…Normally, titania is a white powder with the band gap energy of 3.0-3.2 eV, and it does not absorb light in the visible range [3] that limits its use in photocatalysis. To increase the effectiveness and widen the spectral range of its photocatalytic activity, doping [10][11][12], core@shell structures' formation [13], decoration [14], and the formation of complex composite/hybrid oxides [15,16] are considered.…”

Section: Introductionmentioning

confidence: 99%

Highly Defective Dark Nano Titanium Dioxide: Preparation via Pulsed Laser Ablation and Application

et al. 2020

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The development of methods to synthesize and study the properties of dark titania is of the utmost interest due to prospects for its use, primarily in photocatalysis when excited by visible light. In this work, the dark titania powder was prepared by pulsed laser ablation (Nd:YAG laser, 1064 nm, 7 ns) in water and dried in air. To study the changes occurring in the material, the thermal treatment was applied. The structure, composition, and properties of the obtained powders were studied using transmission electron microscopy, low-temperature N2 adsorption/desorption, X-ray diffraction, thermogravimetry/differential scanning calorimetry, X-ray photoelectron, Raman and UV-vis spectroscopies, and photoluminescence methods. The processes occurring in the initial material upon heating were studied. The electronic structure of the semiconductor materials was investigated, and the nature of the defects providing the visible light absorption was revealed. The photocatalytic and antibacterial activities of the materials obtained were also studied. Dark titania obtained via laser ablation in liquid was found to exhibit catalytic activity in the phenol photodegradation process under visible light (>420 nm) and showed antibacterial activity against Staphylococcus aureus and bacteriostatic effect towards Escherichia coli.

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Preparation of gold-modified F,N-TiO2 visible light photocatalysts and their structural features comparative analysis

Cited by 4 publications

References 21 publications

Effect of N and F content on structural, optical and photocatalytic methylene blue degradation properties of TiO₂

Effect of N and F content on structural, optical and photocatalytic methylene blue degradation properties of TiO₂

Laser-Based Synthesis of TiO2-Pt Photocatalysts for Hydrogen Generation

Highly Defective Dark Nano Titanium Dioxide: Preparation via Pulsed Laser Ablation and Application

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Preparation of gold-modified F,N-TiO2 visible light photocatalysts and their structural features comparative analysis

Cited by 4 publications

References 21 publications

Effect of N and F content on structural, optical and photocatalytic methylene blue degradation properties of TiO2

Effect of N and F content on structural, optical and photocatalytic methylene blue degradation properties of TiO2

Laser-Based Synthesis of TiO2-Pt Photocatalysts for Hydrogen Generation

Highly Defective Dark Nano Titanium Dioxide: Preparation via Pulsed Laser Ablation and Application

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Product

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Effect of N and F content on structural, optical and photocatalytic methylene blue degradation properties of TiO₂

Effect of N and F content on structural, optical and photocatalytic methylene blue degradation properties of TiO₂