Synthesis and characterization of nanoparticulate MnS within the pores of mesoporous silica

被引：6

作者：

Barry, Louse ^{[1
]}

Copley, Mark ^{[1
]}

Holmes, Justin D. ^{[1
,2
]}

Otway, David J. ^{[1
]}

Kazakova, Olga ^{[3
]}

Morris, Michael A. ^{[1
,2
]}

机构：

[1] Univ Coll Cork, Dept Chem, Cork, Ireland

[2] Univ Dublin Trinity Coll, Ctr Res Adapt Nanostruct & Nanodevices, Dublin 2, Ireland

[3] Natl Phys Lab, Teddington TW11 0LW, Middx, England

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2007年 / 180卷 / 12期

关键词：

MnS; mesoporous silica; nanoparticles; magnetism;

D O I：

10.1016/j.jssc.2007.10.004

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Mesoporous silica was loaded with nanoparticulate MnS via a simple post-synthesis treatment. The mesoporous material that still contained surfactant was passivated to prevent MnS formation at the surface. The surfactant was extracted and a novel manganese ethylxanthate was used to impregnate the pore network. This precursor thermally decomposes to yield MnS particles that are smaller or equal to the pore size. The particles exhibit all three common polyrnorphs. The passivation treatment is most effective at lower loadings because at the highest loadings (SiO2:MnS molar ratio of 6:1) large particles (> 50 nm) form at the exterior of the mesoporous particles. The integrity of the mesoporous network is maintained through the preparation and high order is maintained. The MnS particles exhibit unexpected ferromagnetism at low temperatures. Strong luminescence of these samples is observed and this suggests that they may have a range of important application areas. (C) 2007 Elsevier Inc. All rights reserved.

引用

页码：3443 / 3449

页数：7

共 26 条

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