A magnetic zeolitic nanocomposite from occlusion of silica-coated iron species by crystalline titanosilicate-1
A magnetic zeolitic nanocomposite from occlusion of silica-coated iron species by crystalline titanosilicate-1
复制标题
由结晶钛硅酸盐-1吸留二氧化硅包覆的铁物质而形成的磁性沸石纳米复合材料
DOI:
10.1016/j.matlet.2010.08.060
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发表时间:
2010-12
影响因子:
3
通讯作者:
周春晖
中科院分区:
文献类型:
--
作者:
周春晖
This paper examines the preparation of novel magnetic zeolitic nanocomposites from the occlusion of silica-coated iron species by crystalline titanosilicate-1. The results revealed that well-crystallized TS-1 could be synthesized in the presence of silica-hematite nanoparticles. Each as-made nanocomposite particle exhibited a compact and monolithic ‘brick-like’ morphology with a size of ca. 400nm×200nm×200nm. The non-magnetic hematite (iron oxide) in such an as-made nanocomposite can be reduced by hydrogen to produce ferrimagnetic iron oxides and ferromagnetic elemental iron. The resultant nanocomposite consists of TS-1 as outer shell, which occludes a small portion of silica-iron species as the core with a total magnetization value of 3.7emu/g. The silica coating and size of hematite nanoparticles, the presence of ammonium carbonate as the crystallization-mediating agent for nucleation and growth of TS-1 are critical factors when preparing such nanocomposites.
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DOI:
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