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Ion-exchange properties of high pressure high temperature synthetic diamond

Peristyy, A ORCID: 0000-0002-9537-4202, Koreshkova, AN, Paull, B ORCID: 0000-0001-6373-6582 and Nesterenko, PN ORCID: 0000-0002-9997-0650 2017 , 'Ion-exchange properties of high pressure high temperature synthetic diamond' , Diamond and Related Materials, vol. 75 , pp. 131-139 , doi: 10.1016/j.diamond.2017.02.022.

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Abstract

The adsorption and chromatographic properties of microparticulated diamond (1–2 μm and 4–6 μm fractions) from high pressure and high temperature synthesis (HPHT diamond) are investigated, with a focus on their cation-exchange capacity. Several adsorbents were prepared, either by wet oxidation of the surface of HPHT with H2O2/H2SO4or HNO3/H2SO4 mixtures, or by oxidation in air at 700 °C, or following a four-step reduction using LiAlH4 and n-butyllithium. The zeta-potential profiles as a function of pH and ion-exchange capacities were measured for the prepared adsorbents as well as isotherms of adsorption. The ion-exchange selectivity of oxidised HPHT diamond was studied towards alkali, alkaline-earth and transition metal cations.

Item Type: Article
Authors/Creators:Peristyy, A and Koreshkova, AN and Paull, B and Nesterenko, PN
Keywords: synthetic diamond, adsorption, metal cations, ion-exchange, liquid chromatography
Journal or Publication Title: Diamond and Related Materials
Publisher: Elsevier Science Sa
ISSN: 0925-9635
DOI / ID Number: 10.1016/j.diamond.2017.02.022
Copyright Information:

Copyright 2017 Elsevier B.V.

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