Laser-Induced Chemical Liquid-Phase Deposition Plasmonic Gold Nanoparticles on Porous TiO2 Film with Great Photoelectrochemical Performance

Voronin, A. I.; Немцев, И. В.; Мolokeev, Maxim S.; Симунин, М. М.; Kozlova, Ekaterina A.; Markovskaya, Dina V.; Лебедев, Д. В.; Lopatin, Dmitry S.; Khartov, S. V.

doi:10.3390/app12010030

Cited by 3 publications

(3 citation statements)

References 36 publications

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“…For convenience, the samples are labeled as follows: photoelectrodes with Au, 5 nm thick, belong to the second series of samples and, accordingly, depending on the thickness of the TiO2 layer, have the nomenclature 2-1 (5 nm TiO2); 2-2 (10 nm TiO2) and 2-3 (15 nm TiO2); photoelectrodes with Au, 10 nm thick, belong to the third series of samples and, accordingly, depending on the thickness of the TiO2 layer, have the nomenclature 3-1 (5 nm TiO2); 3-2 (10 nm TiO2) and 3-3 (15 nm TiO2) It should be noted that for samples 2-1, 2-2 and 2-3, the voltammogram shows peaks at -0.3-0.4 V and at -0.6 V, which was typical for the reference samples. For sample 7-6, an additional peak is observed in the positive region with a maximum in the region of +0.4 V. This is probably due to the transformation of gold in an alkaline medium [29].…”

Section: Photoelectrochemical Properties Of Tio2/ Ito/ Glass Photoele...mentioning

confidence: 86%

“…Methods for applying plasmonic nanoparticles to a semiconductor are divided into chemical and physical. Chemical methods include: direct chemical reduction of the corresponding metals on the surface of the semiconductor [25,26], hydrothermal/solvothermal synthesis [27], photodeposition [28,29]. Physical methods include magnetron [30] or thermal [31] sputtering of metal targets.…”

Section: Introductionmentioning

confidence: 99%

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Influence of the Morphology of TiO2/ Au NP Nanocomposite on ITO/Glass Substrate on Their Photoelectrochemical Properties

Voronin,

Nemtsev,

Shabanova

et al. 2023

Preprint

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In this work, nanocomposite photoelectrodes of the TiO2/ Au composition were manufactured, in which the size of plasmonic Au nanoparticles was varied, and the morphology of the TiO2 layer, depending on the thickness, changed from an island to a continuous layer. The influence of the morphology of plasmonic Au nanoparticles and the TiO2 layer on the optical and photoelectrochemical characteristics of hybrid photoelectrodes was studied. It has been shown that continuous coating of Au nanoparticles with a TiO2 layer (layer thickness 10 and 15 nm) leads to a decrease in the photoelectric response, and the decrease in photocurrent density and photoconversion efficiency decreases in proportion to the thickness of the TiO2 layer. The indicated drop in characteristics when plasmonic particles are located under the TiO2 layer is presumably associated with the scattering and recombination of charge carriers in the semiconductor layer. The best performance was shown by a system in which large Au nanoparticles (10 nm) are coated with a 5 nm thick layer of titanium dioxide; in this geometry, Au nanoparticles are decorated with TiO2 nanoparticles, as a result of which the photoelectrode-electrolyte interface has a more complex structure.

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Section: Photoelectrochemical Properties Of Tio2/ Ito/ Glass Photoele...mentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Influence of the Morphology of TiO2/ Au NP Nanocomposite on ITO/Glass Substrate on Their Photoelectrochemical Properties

Voronin,

Nemtsev,

Shabanova

et al. 2023

Preprint

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“…A series of photocatalytic designs for producing pure hydrogen have been proposed, in which different solar radiation ranges are used. A promising way of increasing the efficiency of light-induced water splitting is the introduction of plasmon-active nanostructures into the design of photocatalysts [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. Such devices are developed to increase the oxidation photocurrent induced by the injection of hot electrons created by plasmons into a catalytic medium.…”

Section: Introductionmentioning

confidence: 99%

Broadband Tamm Plasmons in Chirped Photonic Crystals for Light-Induced Water Splitting

et al. 2022

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An electrode of a light-induced cell for water splitting based on a broadband Tamm plasmon polariton localized at the interface between a thin TiN layer and a chirped photonic crystal has been developed. To facilitate the injection of hot electrons from the metal layer by decreasing the Schottky barrier, a thin n-Si film is embedded between the metal layer and multilayer mirror. The chipping of a multilayer mirror provides a large band gap and, as a result, leads to an increase in the integral absorption from 52 to 60 percent in the wavelength range from 700 to 1400 nm. It was shown that the photoresponsivity of the device is 32.1 mA/W, and solar to hydrogen efficiency is 3.95%.

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Laser Synthesis of Catalytically Active Materials for Organic Synthesis and Sensor Technology

Kochemirovskaia,

Novomlinsky,

Alyukov

et al. 2024

CCAT

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Introduction: The catalytic activity of metallic nanomaterials depends on their surface morphology. A widely known method is the laser synthesis of metal nanostructures by depositing on dielectric surfaces from aqueous solutions containing metal complexes. The article analyzes the factors that favor the production of conductive, catalytic, and sensory-active deposits by laser method. It is shown that the two main factors is the presence of a large number of charged defects on heterophase surfaces and the structure of metal-containing complexes in solution. This is typical for mono- and bimetallic alloys, the components of which interact with the laser beams according to the autocatalytic type. Using the example of laser deposition from solutions of Co, Ni, Fe, Zn, and Ag salts with homo- and heterophase dielectrics, the sensory and catalytic properties of the deposits are compared by impedance spectroscopy and voltammetry. It has been shown that heterophase precipitation significantly enhances the catalysis response. Background: It is known that the highest catalytic activity exhibits nanostructured and highly porous materials with a large specific surface area and materials containing surface heterogeneity in the form of charged acid-base centers. Such materials are necessary for the creation of new catalysts for organic synthesis and for the creation of new sensor materials for enzyme-free microbiosensors. Active development of new methods for the synthesis of such materials is underway. But not all of them give the expected result. Methods: Laser synthesis methods have the best prospects, including the method of laser-induced metal deposition. This is the laser synthesis of metal nanostructures by depositing dielectric surfaces from aqueous solutions containing metal complexes. Results: Аrticle analyzes the factors that favor the production of conductive, catalytic, and sensory-active deposits by laser method. It is shown that the two main factors are the presence of a large number of charged defects on heterophase surfaces and the structure of a metal-contained complex in solution. This is typical for mono- and bimetallic alloys, the components of which interact with the laser beam according to the autocatalytic type. Using the example of laser deposition from solutions of Co, Ni, Fe, Zn, and Ag salts with homo- and heterophase dielectrics, the sensory and catalytic properties of the deposits are compared by impedance spectroscopy and voltammetry. Conclusion: It has been shown that heterophase precipitation significantly enhances the catalysis response. It is shown that the laser deposition reaction has an autocatalytic mechanism in a dynamic mode. The results of autocatalysis can be used in a stationary mode to create a microbiosensor for glucose, as well as to create a technology for laser refining rare metals and hydrogen energy in a dynamic mode.

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Laser-Induced Chemical Liquid-Phase Deposition Plasmonic Gold Nanoparticles on Porous TiO2 Film with Great Photoelectrochemical Performance

Cited by 3 publications

References 36 publications

Influence of the Morphology of TiO2/ Au NP Nanocomposite on ITO/Glass Substrate on Their Photoelectrochemical Properties

Influence of the Morphology of TiO2/ Au NP Nanocomposite on ITO/Glass Substrate on Their Photoelectrochemical Properties

Broadband Tamm Plasmons in Chirped Photonic Crystals for Light-Induced Water Splitting

Laser Synthesis of Catalytically Active Materials for Organic Synthesis and Sensor Technology

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