New hierarchical titania-based structures for photocatalysis

Ковалев, И. А.; Petrov, Andrey A.; Ibragimova, Olga A.; Shokod’ko, A. V.; Chernyavskii, A. S.; Goodilin, Eugene A.; Solntseva, Konstantin A.; Tarasov, Alexey B.

doi:10.1016/j.mencom.2018.09.031

Cited by 11 publications

(4 citation statements)

References 17 publications

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“…The use of other methods of "wet chemistry", such as hydrothermal synthesis, coprecipitation with subsequent annealing-quenching in a neutral, oxidative or reducing atmosphere, can significantly expand the structural, morphological and disperse characteristics of the resulting nanostructured functional substances and materials [195,196,198,200,207,228,229,231,235,236]. Thus, new oxide materials with high acid-base properties that are of interest in the field of heterogeneous catalysis and new methods of material functionalization have been developed using "wet chemistry" approaches [121][122][123]138,139,207,223,231,297]. It was shown that, just as in the case of materials for supercapacitors [41,45,46,204,211], the type and concentration of functional groups on the surface of the substance play a decisive role here.…”

Section: Features Of the Implementation Of The Combustion Methods Of Gel-like Media In High-speed Kinetic Modementioning

confidence: 99%

“…Such components can be inorganic nanoparticles, for example, quantum dots based on metal chalcogenides stabilized by suitable ligands, as well as coreshell quantum dot structures [119]. The resulting problem of extracting charge carriers from nanoparticles when they are stabilized by organic ligands is solved quite effectively in an electrochemical Gretzel's solar cell [120][121][122][123], created on the basis of nanocrystalline titania TiO 2 , a metal-complex ruthenium dye and an iodine electrolyte and having an efficiency of up to 11 % (Fig. 12).…”

Section: Stability Of Processes In Non-equilibrium Systemsmentioning

confidence: 99%

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Personalized energy systems based on nanostructured materials

Коваленко¹,

Тугова²,

Попков³

et al. 2021

Nanosystems: Phys. Chem. Math.

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In this paper, the achievements, problems and prospects of creating personalized energy systems based on nanostructured materials are analysed. Various concepts of developing methods and ways of personalized energy provision for autonomous human survival in remote natural habitat, emergency situations of natural disasters and technogenic catastrophes when centralized power supply is unavailable or in an effort to reduce the economic and environmental costs of remote energy production and transportation are also considered. The possibilities and limitations of using traditional and renewable alternative energy sources, processes and devices for extracting, storing and converting their energy into the necessary consumer forms due to fundamental physical laws are discussed as well. The article covers the new nanostructured materials with special functional properties for personalized energy systems development. The mechanisms for formation of the required nanostructures in synthesized materials, especially those with a high content of fractal interfacial formations, are considered as well as methods for studying their structural and phase characteristics that determine the achievability of the specified parameters of model converters and energy storage devices.

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Section: Features Of the Implementation Of The Combustion Methods Of Gel-like Media In High-speed Kinetic Modementioning

confidence: 99%

Section: Stability Of Processes In Non-equilibrium Systemsmentioning

confidence: 99%

Personalized energy systems based on nanostructured materials

Коваленко¹,

Тугова²,

Попков³

et al. 2021

Nanosystems: Phys. Chem. Math.

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“…Several studies have been focused on the creation of TiO 2 -SnO 2 nanocomposites in order to increase their photoactivity. Various methods used for the creation of the nanocomposites include sol-gel [38][39][40][41], hydrothermal synthesis [42,43], chemical vapor deposition [44], spray and laser pyrolysis [45][46][47], coprecipitation [48,49], and green [50]. The significant differences that exist between the present investigation and those employed by other researchers lie primarily in the method of preparing the Ti/SnO 2 interface.…”

Section: Introductionmentioning

confidence: 91%

Characterization of Ti/SnO2 Interface by X-ray Photoelectron Spectroscopy

Martinez

Chourasia

2022

Nanomaterials

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The Ti/SnO2 interface has been investigated in situ via the technique of x-ray photoelectron spectroscopy. Thin films (in the range from 0.3 to 1.1 nm) of titanium were deposited on SnO2 substrates via the e-beam technique. The deposition was carried out at two different substrate temperatures, namely room temperature and 200 °C. The photoelectron spectra of tin and titanium in the samples were found to exhibit significant differences upon comparison with the corresponding elemental and the oxide spectra. These changes result from chemical interaction between SnO2 and the titanium overlayer at the interface. The SnO2 was observed to be reduced to elemental tin while the titanium overlayer was observed to become oxidized. Complete reduction of SnO2 to elemental tin did not occur even for the lowest thickness of the titanium overlayer. The interfaces in both the types of the samples were observed to consist of elemental Sn, SnO2, elemental titanium, TiO2, and Ti-suboxide. The relative percentages of the constituents at the interface have been estimated by curve fitting the spectral data with the corresponding elemental and the oxide spectra. In the 200 °C samples, thermal diffusion of the titanium overlayer was observed. This resulted in the complete oxidation of the titanium overlayer to TiO2 upto a thickness of 0.9 nm of the overlayer. Elemental titanium resulting from the unreacted overlayer was observed to be more in the room temperature samples. The room temperature samples showed variation around 20% for the Ti-suboxide while an increasing trend was observed in the 200 °C samples.

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“…In recent years, harmful water pollution, which is difficult to degrade, using traditional physical and chemical techniques, has been recognized as a major source of pollution. [1][2][3][4] As a result, suitable and low-cost methods for water treatment were required. Photocatalysis is one of the most effective strategies, used to purify water from pollutants resources.…”

mentioning

confidence: 99%

SnO₂ Nanoparticles: Green Synthesis, Characterization, and Water Treatment

Salwa

Ahmed

Wasly

et al. 2022

ECS J. Solid State Sci. Technol.

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The green synthesis approach was utilized to synthesize tin dioxide (SnO2) nanoparticles (NPs) using Ocimum Basilicum leaves extract with different concentrations (10, 15, and 20 ml) and different reaction temperatures (30, 60, and 90°C). The green synthesis method is considered economical, environmentally friendly, and non-toxic. X-ray diffraction patterns of the synthesized SnO2 NPs have displayed a tetragonal crystalline structure. The crystallite size of SnO2 NPs increased from 15.12 to 17.9 nm with increasing reaction temperature while decreasing from 20.68 to 17.9 nm with increasing extract concentrations. The morphology of the synthesized SnO2 NPs was investigated using high-energy transmission electron microscopy. The optical energy gap was determined using the diffuse reflectance UV-Vis spectra range (300-1200) nm of SnO2 NPs at different reaction temperatures and different extract concentrations. UV/Visible Spectrophotometry was used for studying the photodegradation of methylene blue dye (MB) dye. The photocatalytic degradation of MB revealed that SnO2 NPs at reaction temperature 90oC degraded 69% of MB solution when exposed to UV illumination for 90 minutes while the degradation reaches 90% for 180 minutes of exposure. It was obvious that the degradation rate of MB was increased with the increase of reaction temperature, and the extract concentration.

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New hierarchical titania-based structures for photocatalysis

Cited by 11 publications

References 17 publications

Personalized energy systems based on nanostructured materials

Personalized energy systems based on nanostructured materials

Characterization of Ti/SnO2 Interface by X-ray Photoelectron Spectroscopy

SnO₂ Nanoparticles: Green Synthesis, Characterization, and Water Treatment

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New hierarchical titania-based structures for photocatalysis

Cited by 11 publications

References 17 publications

Personalized energy systems based on nanostructured materials

Personalized energy systems based on nanostructured materials

Characterization of Ti/SnO2 Interface by X-ray Photoelectron Spectroscopy

SnO2 Nanoparticles: Green Synthesis, Characterization, and Water Treatment

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SnO₂ Nanoparticles: Green Synthesis, Characterization, and Water Treatment