Nanoheterogeneous metal-polymer composites as a new type of effective and selective catalysts

Трахтенберг, Л. И.; Герасимов, Г. Н.; Grigoriev, E. I.; Zavjalov, S. A.; Zagorskaja, O.V.; Zufman, V. Yu.; Смирнов, В. В.

doi:10.1016/s0167-2991(00)80319-5

Cited by 21 publications

(2 citation statements)

References 8 publications

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“…In addition, we should take into account the contacts between semiconductor nanoparticles of various sizes and electronic structures, leading, in particular, to the transfer of electrons between particles and the mutual charging of the contacting nanoparticles [28,29]. Under the conditions of the interaction of the sensor with the molecules of the analyzed gas, the transfer of chemisorbed molecules and the products of their reactions with metal oxide (in particular, active products such as atoms or radicals) between the contacting nanoparticles of the components (spillover) is also possible.…”

Section: Introductionmentioning

confidence: 99%

Effect of Composition and Structure of Metal Oxide Composites Nanostructured on Their Conductive and Sensory Properties

Герасимов

Громов

Иким

et al. 2021

Russ. J. Phys. Chem. B

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The relationship between the structure and properties of nanoscale conductometric sensors based on binary mixtures of metal oxides in the detection of reducing gases in the environment is considered. The sensory effect in such systems is determined by the chemisorption of oxygen molecules and the detected gas on the surface of metal oxide catalytically active particles, the transfer of the reaction products to electron-rich nanoparticles, and subsequent reactions. Particular attention is paid to the doping of nanoparticles of the sensitive layer. In particular, the effect of doping on the concentration of oxygen vacancies, the activity of oxygen centers, and the adsorption properties of nanoparticles is discussed. In addition, the role of heterogeneous contacts is analyzed.

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Section: Introductionmentioning

confidence: 99%

Effect of Composition and Structure of Metal Oxide Composites Nanostructured on Their Conductive and Sensory Properties

Герасимов

Громов

Иким

et al. 2021

Russ. J. Phys. Chem. B

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show abstract

“…Since the metal oxides used in sensors are ionic compounds, their contact in mixed oxide composites can lead to the transition of metal ions of one component into the nanoparticles of another (doping of nanoparticles). This causes the transfer of electrons between particles, their mutual charging, and changes in the structure of the nanoparticles [27,28]. The introduction of small concentrations (up to 5-7%) of metal ions with a higher charge into the metal oxide results in the appearance of an additional positive charge.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nanoparticle Interaction on Structural, Conducting and Sensing Properties of Mixed Metal Oxides

et al. 2023

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This review analyzes the studies published, mainly in the last 10–15 years, on the synthesis, structure, and sensor properties of semiconductor nanocomposites. Particular attention is paid to the interaction between nanoparticles of the sensitive layer, and its effect on the structure, sensitivity, and selectivity of semiconductor sensor systems. Various mechanisms of interaction between nanoparticles in metal oxide composites are considered, including the incorporation of metal ions of one component into the structure of another, heterocontacts between different nanoparticles, and core–shell systems, as well as their influence on the characteristics of gas sensors. The experimental data and studies on the modeling of charge distribution in semiconductor nanoparticles, which determine the conductivity and sensor effect in one- and two-component systems, are also discussed. It is shown that the model which considers the interactions of nanoparticles best describes the experimental results. Some mechanisms of detection selectivity are considered in the conclusion.

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Characterization of Mechanical and Electrical Properties of Nanocomposites

2013

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Nanoheterogeneous metal-polymer composites as a new type of effective and selective catalysts

Cited by 21 publications

References 8 publications

Effect of Composition and Structure of Metal Oxide Composites Nanostructured on Their Conductive and Sensory Properties

Effect of Composition and Structure of Metal Oxide Composites Nanostructured on Their Conductive and Sensory Properties

Effect of Nanoparticle Interaction on Structural, Conducting and Sensing Properties of Mixed Metal Oxides

Characterization of Mechanical and Electrical Properties of Nanocomposites

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