Adsorption and Catalysis on the Transition Metals

Kiselev, V. F.; Крылов, О. В.

doi:10.1007/978-3-642-73887-6_6

Cited by 5 publications

(3 citation statements)

References 224 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the model we propose, the most uncertain information is the energy of electrons localized in chemisorbed O 2 and NO 2 molecules. The literature states that the levels of electrons in O 2 molecules chemisorbed on the ZnO surface are 1.1-0.8 eV below the edge of the conduction band (Kiselev and Krylov, 2012). The information on the energy of trapped electrons in chemisorbed NO 2 molecules is not available.…”

Section: Resultsmentioning

confidence: 99%

Light-Activated Sub-ppm NO2 Detection by Hybrid ZnO/QD Nanomaterials vs. Charge Localization in Core-Shell QD

Чижов

Vasiliev

Rumyantseva³

et al. 2019

Front. Mater.

View full text Add to dashboard Cite

New hybrid materials-photosensitized nanocomposites containing nanocrystal heterostructures with spatial charge separation, show high response for practically important sub-ppm level NO 2 detection at room temperature. Nanocomposites ZnO/CdSe, ZnO/(CdS@CdSe), and ZnO/(ZnSe@CdS) were obtained by the immobilization of nanocrystals-colloidal quantum dots (QDs), on the matrix of nanocrystalline ZnO. The formation of crystalline core-shell structure of QDs was confirmed by HAADF-STEM coupled with EELS mapping. Optical properties of photosensitizers have been investigated by optical absorption and luminescence spectroscopy combined with spectral dependences of photoconductivity, which proved different charge localization regimes. Photoelectrical and gas sensor properties of nanocomposites have been studied at room temperature under green light (λ max = 535 nm) illumination in the presence of 0.12-2 ppm NO 2 in air. It has been demonstrated that sensitization with type II heterostructure ZnSe@CdS with staggered gap provides the rapid growth of effective photoresponse with the increase in the NO 2 concentration in air and the highest sensor sensitivity toward NO 2. We believe that the use of core-shell QDs with spatial charge separation opens new possibilities in the development of light-activated gas sensors working without thermal heating.

show abstract

Section: Resultsmentioning

confidence: 99%

Light-Activated Sub-ppm NO2 Detection by Hybrid ZnO/QD Nanomaterials vs. Charge Localization in Core-Shell QD

Чижов

Vasiliev

Rumyantseva³

et al. 2019

Front. Mater.

View full text Add to dashboard Cite

show abstract

“…For materials with p-type conductivity, the conductivity increases with an increase in the oxygen pressure; whereas for n-type oxides, the conductivity decreases with an increase in the oxygen pressure. According to Krilov and Kiselev [13], the metal oxides of highest valence states, as a rule, are disposed to partial reduction, which leads to an appearance of stoichiometric excess of metal in the lattice of n-type semiconductor. Oxides of lowest degrees of oxidation are disposed to partial oxidation, and both stoichiometric excess of oxygen and p-type conductivity is a consequence of this fact.…”

Section: Solid State Phenomena Vol 266mentioning

confidence: 99%

Metal Oxides for Application in Conductometric Gas Sensors: How to Choose?

Brînzari

Пронин

Ham

et al. 2017

SSP

View full text Add to dashboard Cite

show abstract

“…32 It has been shown that transition metal loading to the carbon structure could improve hydrogen uptake 33 of the carbon structures. 34 Changes of CNT structures by transition metal doping [35][36][37][38] and transition metal oxide nanoparticle [39][40][41][42] have been also reported to enhance H 2 adsorption capacity. Numerous studies have demonstrated that the addition of metals such as Ni, Pd, Fe, Pt, Co, and V to carbon structures enhances their hydrogen storage capacity.…”

Section: Introductionmentioning

confidence: 99%