X-ray Photoelectron Spectroscopy Study of Mg Adsorption on Nanocrystalline Hydroxyapatite

被引：3

作者：

Teterin, Yu A. ^{[1
,2
]}

Rudin, V. N. ^{[1
]}

Severin, A., V ^{[1
]}

Paul', M. E. ^{[1
]}

Maslakov, K., I ^{[1
]}

Teterin, A. Yu ^{[2
]}

Dvoryak, S., V ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Moscow 119991, Russia

[2] Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia

来源：

INORGANIC MATERIALS | 2020年 / 56卷 / 10期

关键词：

X-ray photoelectron spectroscopy; adsorption; hydroxyapatite; ELECTRON;

D O I：

10.1134/S0020168520100155

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied Mg2+ adsorption on hydroxyapatite (HAp) nanocrystals and constructed its isotherm at equilibrium cation concentrations in the range 0-0.35 mol/L. For a number of samples, corresponding to characteristic points in the adsorption isotherm, the composition and the oxidation state of the elements present on the surface of the sorbent have been determined by X-ray photoelectron spectroscopy (XPS). The surface magnesium concentration determined by XPS, which detects only ions in a surface layer a few nanometers in thickness, has been found to be considerably lower than the total amount of cations in the solid phase, evaluated from the experimentally determined adsorption isotherm. We assume that, during the sorption process, some of the magnesium ions substitute for calcium ions in the bulk of the HAp and some adsorb in the form of MgCl2. The results obtained in this study constitute a fundamental basis for practical solutions in designing integrated medications based on HAp with magnesium.

引用

页码：1011 / 1019

页数：9

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