CN100503444C - CdS、CdSe或CdTe空心纳米环及其制法 - Google Patents

CdS、CdSe或CdTe空心纳米环及其制法 Download PDF

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CN100503444C
CN100503444C CNB2007100224178A CN200710022417A CN100503444C CN 100503444 C CN100503444 C CN 100503444C CN B2007100224178 A CNB2007100224178 A CN B2007100224178A CN 200710022417 A CN200710022417 A CN 200710022417A CN 100503444 C CN100503444 C CN 100503444C
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cdse
cdte
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cds
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朱俊杰
缪建军
姜立萍
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Nanjing University
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Abstract

CdS、CdSe或CdTe空心纳米环,它们为六边形外形,外对角线长200-260纳米,内对角线长50-70纳米,环体内部为空心结构。其中:CdS空心纳米环或CdSe空心纳米环为六方相;CdTe空心纳米环为立方相。本发明的CdS、CdSe或CdTe空心纳米环可以应用于制备生物传感器件或微电子器件。本发明公开了其制法。

Description

CdS、CdSe或CdTe空心纳米环及其制法
技术领域
本发明涉及CdS、CdSe或CdTe空心纳米环及其制法。其制法是用Cd(OH)2转化法制备CdS、CdSe或CdTe空心纳米环。
背景技术
近年来,环状纳米结构引起了科学家广泛的兴趣,它具有非常新颖的物理化学性质,例如磁性纳米环可以维持一种稳定的涡流态,从而可以用于高密度磁性随机存储器[参见:J.G.Zhu,Y.F.Zheng,G.A.Prinz,J.Appl.Phys.2000,87,6668],金纳米环在其环内展现出增强的局域电磁场[参见:J.Aizpurua,P.Hanarp,D.S.Sutherland,et al.Phys.Rev.Lett.2003,90,57401],同时在纳米金属环中的超导现象也得到了研究[参见:E.M.Q.Jariwala,P.Mohanty,M.B.Ketchen,et al.Phys.Rev.Lett.2001,86,1594]。镉的硫属化合物是一类重要的半导体材料,在光电子器件、太阳能转换、生物标记、疾病检测等方面都具有很重要的应用[参见:(a)Y.P.Rakovich,J.F.Donegan Semicond.Sci.Technol.2007,22,145.(b)Z.H.Hu,M.D.Fischbein,C.Querner,et al.Nano Lett.2006,6,2585-2591.(c)F.Q.Hu,Y.L.Ran,Z.A.Zhou,et al.Nanotechnology 2006,17,2972.(d)R.S.Singh,V.K.Rangari,S.Sanagapalli,et al.Sol.Energy Mater.Sol.Cells 2004,82,315.]。除了少量文献报道了自组装法构建CdS纳米环外[参见:B.Liu,H.C.Zeng,J.Am.Chem.Soc.2005,127,18262],到目前为止CdS、CdSe或CdTe空心纳米环还未见报道。
发明内容
本发明的目的是提供一种CdS、CdSe或CdTe空心纳米环及其制备方法。
本发明的技术方案如下:
CdS、CdSe或CdTe空心纳米环,它们为六边形外形,外对角线长200-260纳米,内对角线长50-70纳米,环体内部为空心结构。
上述的空心纳米环,CdS空心纳米环或CdSe空心纳米环为六方相。
上述的空心纳米环,CdTe空心纳米环为立方相。
一种制备CdS、CdSe、或CdTe空心纳米环的方法,它是将Cd(OH)2纳米环分别加入到含有等物质的量的硫代乙酰胺、Na2SeSO3或NaHTe的水溶液(溶液浓度为0.05-0.2mol/L)中,反应20分钟,将产物进行离心分离,用蒸馏水、乙醇依次洗涤沉淀物,然后将所得到的沉淀物置于60℃烘箱中烘干,即分别制得CdS、CdSe或CdTe空心纳米环。
上述的Cd(OH)2纳米环可以按照文献J.J.Miao,R.L.Fu,J.M.Zhu,et al.Chemical Communications 2006,28,3013制备。
本发明的产物经XRD测定,结果表明CdS和CdSe空心纳米环为纯的六方相以及CdTe空心纳米环为立方相。峰的位置与强度都与文献值分别匹配[参见:Joint Committee on Powder Diffraction Standards(JCPDS),File No 41-1049、77-2307、75-2086]。没有发现杂相峰,表明产品的纯度比较高。通过TEM照片,观察到本发明的空心纳米环形貌都很相似,为六边形外形,外径200-260纳米,内径50-70纳米,环体内部为空心结构。
本发明的制备CdS、CdSe或CdTe空心纳米环的方法原料简单易得、条件温和、耗时短、简便易行,所得的产物为纯的六方相CdS或CdSe空心纳米环以及立方相的CdTe空心纳米环。峰的位置与强度都与文献值分别匹配,本发明的空心纳米环形貌都很相似,为六边形外形,外径200-250纳米,内径50-70纳米,环体内部为空心结构。
本发明的CdS、CdSe或CdTe空心纳米环可以应用于制备生物传感器件或微电子器件。
附图说明
图1为CdS、CdSe和CdTe空心纳米环的X射线粉末衍射图和TEM照片,图1a为CdTe的X射线粉末衍射图;图1b为CdTe的TEM照片;图1c为CdSe的X射线粉末衍射图;图1d为CdSe的TEM照片;图1e为CdS的X射线粉末衍射图;图1f为CdS的TEM照片。
具体实施方式
实施例1.CdTe空心纳米环的制备
将1.5mmol Cd(OH)2纳米环加入到含有1.5mmol NaHTe的30ml水溶液中,氮气保护下搅拌反应20分钟,将产物进行离心分离,用蒸馏水、乙醇依次洗涤沉淀物,然后将所得到的沉淀物置于60℃烘箱中烘干。XRD测定结果(见附图1a)表明产物为纯的立方相的CdTe,没有发现杂相峰,表明产品的纯度比较高。通过TEM照片(附图1b),观察到CdTe环产物为六边形外形,外径200-260纳米,内径50-70纳米,环体内部为空心结构,附图b中的扫描电镜插图可以清晰的看到内部为空心。
实施例2.CdTe空心纳米环的制备
将Cd(OH)2纳米环和NaHTe的用量改为6mmol,水溶液体积为30ml,制备的其他条件同实施例1。得到晶体结构和形态都类似于实施例1的产品。
实施例3.CdTe空心纳米环的制备
将反应时间改为30分钟,制备的其他条件同实施例1。得到晶体结构和形态都类似于实施例1的产品。
实施例4.CdSe空心纳米环的制备
将NaHTe换成Na2SeSO3,制备的其他条件同实施例1。得到CdSe纳米空心环,XRD测定结果如附图1c所示,表明产物为纯的六方相的CdSe,没有发现杂相峰。通过TEM照片(附图1d),观察到CdSe环产物为六边形外形,外径200-260纳米,内径50-70纳米,环体内部为空心结构。
实施例5.CdSe空心纳米环的制备
将Cd(OH)2纳米环和Na2SeSO3的用量改为6mmol,水溶液体积为30ml,制备的其他条件同实施例4。得到晶体结构和形态都类似于实施例4的产品。
实施例6.CdSe空心纳米环的制备
将反应时间改为30分钟,制备的其他条件同实施例4。得到晶体结构和形态都类似于实施例4的产品。
实施例7.CdS空心纳米环的制备
将NaHTe换成硫代乙酰胺,制备的其他条件同实施例1。得到CdS纳米空心环,XRD测定结果如附图1e所示,表明产物为纯的六方相的CdS,没有发现杂相峰。通过TEM照片(附图1f),观察到CdS环产物为六边形外形,外径200-260纳米,内径50-70纳米,环体内部为空心结构。
实施例8.CdS空心纳米环的制备
将Cd(OH)2纳米环和硫代乙酰胺的用量改为6mmol,水溶液体积为30ml,制备的其他条件同实施例7。得到晶体结构和形态都类似于实施例7的产品。
实施例9.CdSe空心纳米环的制备
将反应时间改为30分钟,制备的其他条件同实施例7。得到晶体结构和形态都类似于实施例7的产品。

Claims (4)

1.CdS、CdSe或CdTe空心纳米环,其特征是:它们为六边形外形,外对角线长200-260纳米,内对角线长50-70纳米,环体内部为空心结构。
2.根据权利要求1所述的空心纳米环,其特征是:CdS空心纳米环或CdSe空心纳米环为六方相。
3.根据权利要求1所述的空心纳米环,其特征是:CdTe空心纳米环为立方相。
4.一种制备权利要求1所述的CdS、CdSe或CdTe空心纳米环的方法,其特征是:将Cd(OH)2纳米环分别加入到含有等物质的量的硫代乙酰胺、Na2SeSO3或NaHTe的水溶液中,硫代乙酰胺、Na2SeSO3或NaHTe水溶液的浓度为0.05-0.2mol/L,氮气保护下搅拌反应20-30分钟,将产物进行离心分离,用蒸馏水、乙醇依次洗涤沉淀物,然后将所得到的沉淀物置于60℃烘箱中烘干,即分别制得CdS、CdSe或CdTe空心纳米环。
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