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Features of Physical and Chemical Adsorption During Interaction of Polycrystalline and Nanocrystalline Materials with Gases

† V.Lavrenko,
 
† V.Lavrenko,
 
I.Podchernyaeva,
 
D.Schur,
 
A.Zolotarenko,
 
A.Zolotarenko
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Powder Metallurgy and Metal Ceramics - Scopus: Springer US , 2018, Т.56, #9-10
http://www.materials.kiev.ua/article/2768

Abstract

Diborides of group IV transition metals are considered in the context of the features of two types of adsorption (physical and chemical) during interaction of polycrystalline and nanocrystal materials (carbon nanotubes, highly dispersed iron powder etc.) with gases (CO2, H2O-vapor). Due to Raman scattering spectroscopy, it is established that, in the case of adsorption, only gas chemical adsorption with typical minimal distance between absorbed gas molecule and adsorbing agent surface occurs on the surfaces of all synthesized nanoparticles. It is confirmed that the reference Raman spectrum of the correspondent nanoparticles (according to the Hirsch reference book) remains in all cases. The adsorption of oxygen and nitrogen during oxidation of diborides of group IV transition metals is investigated.

https://doi.org/10.1007/s11106-018-9922-z

Translated from Poroshkovaya Metallurgiya, Vol. 56, Nos. 9–10 (517), pp. 23–33, 2017.


BORIDES OF TRANSITION METALS, CARBON NANOTUBES, CHEMICAL ADSORPTION, DISTORTION OF ELECTRON SHELL OF SURFACE ATOMS, IRON NANOPOWDERS, NANOMATERIALS, PHYSICAL ADSORPTION, RAMAN SCATTERING SPECTROSCOPY

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