Textural Changes during Topochemical Decomposition of Nanocrystalline Mg(OH)2 to MgO | Sciact - CRIS-system of Boreskov Institute of Catalysis

Textural Changes during Topochemical Decomposition of Nanocrystalline Mg(OH)2 to MgO Full article

Journal

The Journal of Physical Chemistry B
ISSN: 1520-6106 , E-ISSN: 1520-5207

Output data

Year: 2003, Volume: 107, Number: 11, Pages: 2427-2434 Pages count : 8 DOI: 10.1021/jp021474i

Tags

Adsorption; Decomposition; Fourier transform infrared spectroscopy; High resolution electron microscopy; Nanostructured materials; Temperature; Thermogravimetric analysis; X ray diffraction analysis

Authors

Mel'gunov Maxim S. ¹ , Fenelonov Vladimir B. ¹ , Melʹgunova Elena A. ¹ , Bedilo Alexander F. ² , Klabunde Kenneth J. ²

Affiliations

1	Boreskov Institute of Catalysis, Prospekt Akademika LaVrentieva 5, 630090, Novosibirsk, Russian Federation
2	Department of Chemistry, Kansas State UniVersity, Manhattan, Kansas 66506

Funding (1)

Civilian Research and Development Foundation

RC1-2340-NO-02

Transformation of nanocrystalline Mg(OH)2 to MgO under dynamic vacuum in a temperature range of 570−770 K was studied by TGA-GCMS, FTIR, HREM, XRD, helium pycnometry, and nitrogen adsorption at 77 K. Several processes are shown to occur during transformation including: (a) release of compounds chemisorbed during preparation of nanocrystalline Mg(OH)2 simultaneously with hydroxide−oxide transformation; (b) fragmentation of nanoparticles at temperatures lower than 670 K; and (c) re-crystallization and sintering of nanoparticles, whose mean size increases and relative number decreases rapidly with temperature above 670 K. A new phenomenon of decrease of the interlayer distance in MgO crystallites with increase of the nanoparticle size was observed.

Mel'gunov M.S. , Fenelonov V.B. , Melʹgunova E.A. , Bedilo A.F. , Klabunde K.J.
Textural Changes during Topochemical Decomposition of Nanocrystalline Mg(OH)2 to MgO
The Journal of Physical Chemistry B. 2003. V.107. N11. P.2427-2434. DOI: 10.1021/jp021474i WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Jun 21, 2002
Accepted:	Aug 13, 2002
Published online:	Feb 22, 2003
Published print:	Mar 1, 2003

Web of science:	WOS:000181599400001
Scopus:	2-s2.0-0037725133
Elibrary:	41798636
Chemical Abstracts:	2003:134054
Chemical Abstracts (print):	138:313381
OpenAlex:	W2080619774

DB	Citing
Web of science	85
Scopus	86
Elibrary	84
OpenAlex	84