高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (7): 1460.

• 研究论文 • 上一篇    下一篇

氨基功能化有序介孔SiO2薄膜组装Au纳米粒子复合材料的可调色散性质

方靖岳, 秦石乔, 张学骜, 李新华, 王飞, 常胜利   

  1. 国防科学技术大学理学院, 长沙 410073
  • 收稿日期:2010-10-11 修回日期:2011-02-14 出版日期:2011-07-10 发布日期:2011-06-02
  • 通讯作者: 张学骜 E-mail:xazhang@nudt.edu.cn
  • 基金资助:

    中国科学技术大学校预研基金(批准号: JC08-02-08)资助.

Adjustable Dispersive Property of the Nanocomposite of Gold Nanoparticles in Amino-functionalized  Mesoporous Silica Thin Films

FANG Jing-Yue, QIN Shi-Qiao, ZHANG Xue-Ao*, LI Xin-Hua, WANG Fei, CHANG Sheng-Li   

  1. College of Science, National University of Defense Technology, Changsha 410073, China
  • Received:2010-10-11 Revised:2011-02-14 Online:2011-07-10 Published:2011-06-02
  • Contact: ZHANG Xue-Ao E-mail:xazhang@nudt.edu.cn
  • Supported by:

    中国科学技术大学校预研基金(批准号: JC08-02-08)资助.

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摘要： 以聚环氧乙烷－聚环氧丙烷－聚环氧乙烷（P123）为模板剂，采用共溶胶的蒸发诱导自组装方法制备了氨基功能化介孔SiO2薄膜，然后利用氯金酸（HAuCl4）与介孔SiO2薄膜孔道内壁的氨基之间的中和反应，组装Au纳米粒子制备得到Au/SiO2纳米复合材料。使用TEM、XRD和分光光度计对材料进行测试表明，无水乙醇萃取获得的氨基功能化介孔SiO2薄膜具有高度有序的介孔结构；利用中和反应及氢气氛围煅烧还原的方法将Au纳米粒子组装在介孔SiO2薄膜的孔道中，分散均匀且晶化良好，表现出（111）晶面的择优取向生长；随着中和反应时间增加，Au纳米颗粒的粒径呈增长趋势，Au/SiO2纳米复合材料的吸收光谱发生红移，这表明了Au量子点的量子尺寸效应，说明浸渍时间能调控Au/ SiO2纳米复合材料的色散性质。

关键词: 有序介孔SiO2薄膜, 氨基功能化, Au纳米粒子, 吸收光谱, 色散性质

Abstract: The highly ordered amino-functionalized mesoporous silica thin films (MTFs) have been directly synthesized by co-condensation of tetraethoxysilane (TEOS) and 3-aminopropyltriethoxysilane (APTES) in the presence of P123 (EO20PO70EO20). Using the neutralization-reaction mechanism followed with a reduction procedure of hydrogen-ambience calcinations, the gold nanoparticles have been effectively introduced into the pore channels of amino-functionalized MTFs, and obtained the Au/SiO2 nanocomposite. The nanomaterials were characterized by XRD, TEM, and UV-vis. It was found that removing the surfactant by ethanol extraction can get well-ordered mesoporous structures compared with the calcinations; gold nanoparticles grow in a preferred orientation of (111) planes of the face-centered-cubic structure in the pore channels and crystallized nicely; the absorption spectrum of Au/SiO2 nanocomposite undergoes a red-shift as the reaction time increase. It is a quantum size effect of gold nanoparticles, and shows that the dipping time could regulate the dispersive property of Au/SiO2 nanocomposite.

Key words: Mesoporous silica thin film, Amino-functionalized, Gold nanoparticle, Absorption spectrum, Dispersive property

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