高等学校化学学报

高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (12): 2203.

• 研究论文 • 上一篇    下一篇

反相乳液中Ag/TiO2纳米杂化粒子的制备及其SERS效应

张丹1,张荣炜1,宋溪明2,赵大成1,张明1,李莹2,刘凤岐1   

  1. 1.吉林大学化学学院,长春130023;2.辽宁大学化学科学与工程学院,沈阳110036
  • 收稿日期:2004-11-22 出版日期:1905-03-14 发布日期:1905-03-14
  • 通讯作者: 刘凤岐(1958年出生),男,博士,教授,博士生导师,主要从事高分子凝聚态物理与功能材料研究. E-mail:fengqiliu@21cn.com;
  • 基金资助:

    国家自然科学基金(批准号:20274014)资助.

Preparation of Ag/TiO2 Hybrid Nanoparticles in W/O Emulsion and Its Surface-enhanced Raman Scattering Effect

ZHANG Dan1, ZHANG Rong-Wei1, SONG Xi-Ming2*, ZHAO Da-Cheng1,ZHANG Ming1, LI Ying2, LIU Feng-Qi1*   

  1. 1. College of Chemistry, Jilin University, Changchun 130023, China;
    2. College of Chemical Science and Engineering, Liaoning University, Shenyang 110036, China
  • Received:2004-11-22 Online:1905-03-14 Published:1905-03-14
  • Contact: Liu Feng-Qi,E-mail:fengqiliu@21cn.com;

摘要：

在反相乳液的微环境中用一步反应法制备了Ag/TiO2纳米杂化粒子，并用TEM,SPS,XPS及XRD等方法进行了表征.结果表明,Ag粒子(5～15nm)已镶嵌在TiO2(30～50nm)结构中，并且具有SERS活性.

关键词: Ag;TiO2;杂化材料;表面增强拉曼散射(SERS), Ag, TiO2, 杂化材料, 表面增强拉曼散射(SERS)

Abstract:

Ag/TiO2 hybrid nanoparticles have been  synthesized via a remarkably simple one-pot route in water-in-oil emulsions, where the reduction of Ag+ to Ag0 in water phase and the hydrolysis of Ti(OC4H9)4 at the water/oil interface took place simultaneously. Such hybrid nanoparticles were characterized with  TEM, SPS, XPS and X-ray diffraction. The procedure led to form nanocomposites with Ag in the size range of 5-15 nm diameter enchased in amorphous TiO2 in the size range of 30-50 nm diameter in a typical synthesis. XRD results indicated that TiO2 upon thermal treatments, gets converted to crystalline oxides.  Both TiO2 and Ag/TiO2 nanoparticles prepared by our methods keep their anatase structures even above 700 ℃.Furthermore, SPS and XPS  measurements indicate that  Ag/TiO2 nanoparticles have special structure instead of the simple mixture of  Ag and TiO2 nanoparticles.  The surface-enhanced Raman scattering activity of the hybrid nanoparticles was also investigated, and the results revealed their potential application in SERS substrate materials.

Key words: Ag; TiO2; Hybrid nanoparticles; Surface-enhanced Raman scattering(SERS), Ag, TiO2, Hybrid nanoparticles, Surface-enhanced Raman scattering(SERS)

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