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Low-Temperature Synthesis of Crystalline Inorganic/Metallic Nanocrystal-Halloysite Composite Nanotubes

查看全文 作　　者：Cuiping [1]Li;Jiaqiang [1]Wang;Siquan [1]Feng;Zan [2]Liu 高影响力作者 机构地区：[1]Department of Applied Chemistry,Key Laboratory of Medicinal Chemistry for Natural Resource,Ministry of Education,School of Chemical Science and Technology,Yunnan University,Kunming,Yunnan 650091,China;[2]Kunming Cable Co.,Ltd,Kunming,Yunnan 650100,China高影响力机构 出　　处：《Chinese Journal of Chemistry》索引2014年第32卷第7期,共8页高影响力期刊 基　　金：National Natural Science Foundation of China(No.51003091);the Applied Basic Foundation of Yunnan Province(No.2013FB002);the Education Research Foundation of Yunnan Province(Nos.2013Y361,2010Y240);the Research Foundation of Yunnan University(No.2009B06Q);the Backbone Teacher Training Program of Yunnan University(No.XT412003). 摘　　要：We have demonstrated a facile approach for the low-temperature synthesis of crystalline inorganic/metallic nanocrystal-halloysite composite nanotubes by employing the bulk controlled synthesis of inorganic/metallic nanocrystals on halloysite nanotubes.The halloysite clay nanotubes can adsorb the target precursor and induce inorganic/metallic nanocrystals to grow in situ.The crystalline phase and morphology of the composite clay nanotubes is tunable.By simply tuning the acidity of the titania sol,the crystalline titania-clay nanotubes with tunable crystalline phases of anatase,a mixture of anatase and rutile or rutile are achieved.The approach is general and has been extended to synthesize the representative perovskite oxide(barium and strontium titanate)-halloysite composite nanotubes.Metallic nickel nanocrystal can also be grown on the surface of halloysite nanotubes at low temperature.The traditional thermal treatment for crystallite transformation is not required,thus intact contour of halloysite nanotubes and the crystallinity structure of halloysite nanotubes can be guaranteed.The combined properties from inorganic/metallic nanocrystal(high refractive index,high dielectric constant and catalytic ability)and the halloysite clay nanotubes are promising for applications such as photonic crystals,high-k-gate dielectrics,photocatalysis and purification. 关 键 词：composite nanotubes HALLOYSITE inorganic nanocrystal perovskite oxide low temperature synthesis
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