Synthesis and study of basic zinc carbonate

Dobrydnev, S. V.; Molodtsova, M. Yu.; Kizim, N. F.

doi:10.1134/s0036023614080038

Cited by 6 publications

(4 citation statements)

References 1 publication

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“…Although it was published earlier [ 65 ] that under close conditions, the reaction of ZnO with an aqueous NH 4 HCO 3 solution leads to the one-stage formation of HZ, our studies showed that an intermediate formation of ZnNH 3 CO 3 takes place. The traces of ZnO wurtzite phase, also revealed in the ZnO-Prec(1) precipitate by XRD ( Figure 2 a), may have been incompletely reacted initial ZnO micropowder; however, its presence was not confirmed in the Raman spectra ( Figure 3 a,b) or the XRD pattern of the ZnO-Prec(2) precipitate ( Figure 2 a).…”

Section: Resultscontrasting

confidence: 82%

Highly Active Nanocrystalline ZnO and Its Photo-Oxidative Properties towards Acetone Vapor

et al. 2023

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Zinc oxide is one of the well-known photocatalysts, the potential applications of which are of great importance in photoactivated gas sensing, water and air purification, photocatalytic synthesis, among others. However, the photocatalytic performance of ZnO strongly depends on its morphology, composition of impurities, defect structure, and other parameters. In this paper, we present a route for the synthesis of highly active nanocrystalline ZnO using commercial ZnO micropowder and ammonium bicarbonate as starting precursors in aqueous solutions under mild conditions. As an intermediate product, hydrozincite is formed with a unique morphology of nanoplates with a thickness of about 14–15 nm, the thermal decomposition of which leads to the formation of uniform ZnO nanocrystals with an average size of 10–16 nm. The synthesized highly active ZnO powder has a mesoporous structure with a BET surface area of 79.5 ± 4.0 m2/g, an average pore size of 20 ± 2 nm, and a cumulative pore volume of 0.507 ± 0.051 cm3/g. The defect-related PL of the synthesized ZnO is represented by a broad band with a maximum at 575 nm. The crystal structure, Raman spectra, morphology, atomic charge state, and optical and photoluminescence properties of the synthesized compounds are also discussed. The photo-oxidation of acetone vapor over ZnO is studied by in situ mass spectrometry at room temperature and UV irradiation (λmax = 365 nm). The main products of the acetone photo-oxidation reaction, water and carbon dioxide, are detected by mass spectrometry, and the kinetics of their release under irradiation are studied. The effect of morphology and microstructure on the photo-oxidative activity of ZnO samples is demonstrated.

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Section: Resultscontrasting

confidence: 82%

Highly Active Nanocrystalline ZnO and Its Photo-Oxidative Properties towards Acetone Vapor

et al. 2023

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“…When these data are taken collectively with XRD observations, ZnO is a plausible minor component of the test lot of zinc carbonate basic. It is also important to note that there was an absence of a peak between 100 °C and 200 °C, which signifies that the test chemical was not hydrated (Dobrydnev, Molodtsova, and Kizim 2014).…”

Section: Resultsmentioning

confidence: 99%

Characterization of Zinc Carbonate Basic as a Source of Zinc in a Rodent Study Investigating the Effects of Dietary Deficiency or Excess

et al. 2017

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Zinc deficiency and excess can result in adverse health outcomes. There is conflicting evidence regarding whether excess or deficient zinc in the diet can contribute to carcinogenicity. The objective of this study was to characterize zinc carbonate basic for use as a source of dietary zinc in a rodent toxicity and carcinogenicity study investigating the effects of zinc deficiency and excess. Because of the complex chemistries of zinc carbonate basic compounds, inconsistent nomenclature, and literature and reference spectra gaps, it was necessary to employ multiple analytical techniques, including Karl Fischer titration, combustion analysis, inductively coupled plasma–optical emission spectrometry, X-ray diffraction, infrared spectroscopy, X-ray fluorescence spectrometry, and thermogravimetric analysis to characterize the test article. Based on the collective evidence and through the process of elimination, the test article was found to be composed mainly of zinc carbonate basic with zinc oxide as a minor component. The zinc content was determined to be 56.6% (w/w) with heavy metals such as arsenic, cadmium, mercury and lead below the limit of quantitation of less than or equal to 0.01%. The test material was stable at ambient temperature. Based on the work described in this manuscript, the test article was suitable for use as a source of zinc in studies of deficiency and excess in the diet.

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“…Complex oxide compounds with an apatitelike structure (space group P6 3 /m) can be used as the latter. The interest in such compounds is conditioned by the unique properties which are of applied value; they can be used as biomaterials, phosphors, sensors, laser and fluorescent materials, organic synthesis catalysts [1][2][3][4][5][6][7], in acousto-optic devices, in medicine, power industry, oil refining, environment protection [8], for radioactive waste disposal [9]. A distinctive feature of compounds with the apatite structure is the possibility of substitution of certain structural units by others without a considerable change of the structure [3,[10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, crystal structure and high-temperature heat capacity of substituted apatites Pb-=SUB=-9-=/SUB=-R(GeO-=SUB=-4-=/SUB=-)-=SUB=-3-=/SUB=-(VO-=SUB=-4-=/SUB=-)-=SUB=-3-=/SUB=- (R=Tb, Dy, Ho)

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Мolokeev

Golubeva

et al. 2022

Physics of the Solid State

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Pb9R(GeO4)3(VO4)3 (R=Tb, Dy, Ho) apatites were obtained by solid-phase synthesis from the initial oxides of PbO, Tb2O3 (Dy2O3, Ho2O3), GeO2 and V2O5 by sequential annealing (at a temperature of 773-1073 K) in an air atmosphere. Their crystal structure has been determined by X-ray diffraction analysis. The high-temperature heat capacity was measured by differential scanning calorimetry. Based on the experimental dependence of the heat capacity on the temperature, the thermodynamic properties are calculated. Keywords: apatites, solid-phase synthesis, crystal structure, heat capacity, thermodynamic properties. Keywords: apatites, solid-phase synthesis, crystal structure, heat capacity, thermodynamic properties.

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Synthesis and study of basic zinc carbonate

Cited by 6 publications

References 1 publication

Highly Active Nanocrystalline ZnO and Its Photo-Oxidative Properties towards Acetone Vapor

Highly Active Nanocrystalline ZnO and Its Photo-Oxidative Properties towards Acetone Vapor

Characterization of Zinc Carbonate Basic as a Source of Zinc in a Rodent Study Investigating the Effects of Dietary Deficiency or Excess

Synthesis, crystal structure and high-temperature heat capacity of substituted apatites Pb-=SUB=-9-=/SUB=-R(GeO-=SUB=-4-=/SUB=-)-=SUB=-3-=/SUB=-(VO-=SUB=-4-=/SUB=-)-=SUB=-3-=/SUB=- (R=Tb, Dy, Ho)

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