Determination of Nickel, Zinc and Cobalt in Advanced Materials Based on NixCo3 –xO4 and ZnxCo3 –xO4 by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and X-Ray Fluorescence

Krotova, A. A.; Prikhodko, K. Ya.; Vladimirova, S. A.; Филатова, Д. Г.

doi:10.1134/s0020168519140097

Cited by 5 publications

(2 citation statements)

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“…A detailed description of this technique can be found in Ref. [20]. The phase composition, microstructure parameters and the charge state of cations were studied by XRD, TEM, XPS, EPR, as well as BET measurements [19].…”

Section: Nanocrystalline Powders Of Co 3 O 4 and Nimentioning

confidence: 99%

Nanocrystalline Oxides NixCo3−xO4: Sub-ppm H2S Sensing and Humidity Effect

et al. 2021

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In this work, p-type oxide semiconductors, Co3O4 and complex oxides NixCo3−xO4 (x = 0.04, 0.07, 0.1), were studied as materials for sub-ppm H2S sensing in the temperature range of 90–300 °C in dry and humid air. Nanocrystalline Co3O4 and NixCo3−xO4 (x = 0.04, 0.07, 0.1) were prepared by coprecipitation of cobalt and nickel oxalates from nitrate solutions and further annealing at 300 °C. The surface reactivity of the obtained materials toward H2S both in dry and humid atmosphere (relative humidity at 25 °C R.H. = 60%) was investigated using diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Sensor measurements showed a decrease in sensor signal toward 1 ppm H2S with an increase in Ni content because of a decrease in chemisorbed surface oxygen species. On the other hand, sensor signal increases for all samples with increasing the relative humidity that depends on reactivity of the surface hydroxyl groups, which stimulate the decomposition of surface sulfites and provide better surface regeneration at higher temperature. This assumption was additionally confirmed by the faster saturation of the conductivity curve and a decrease in the sensor response time in humid air.

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Section: Nanocrystalline Powders Of Co 3 O 4 and Nimentioning

confidence: 99%

Nanocrystalline Oxides NixCo3−xO4: Sub-ppm H2S Sensing and Humidity Effect

et al. 2021

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“…4 Consequently, the development of accurate and rapid measurement methods for cobalt in diverse sample types is imperative. Among numerous analytical techniques employed to determine cobalt levels, graphite furnace atomic absorption spectrometry (GFAAS), inductively coupled plasma (ICP), 5 flame atomic absorption spectroscopy (FAAS), 6 inductively coupled plasma mass spectrometry (ICP-MS), 7 inductively coupled plasma optical emission spectroscopy (ICP-OES), 8 and UV-Vis spectrometry 9 can be mentioned. While these techniques offer high accuracy, they often necessitate sophisticated and costly equipment.…”

Section: Introductionmentioning

confidence: 99%