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Synthesis and characterization of TiO_2/Ag/polymer ternary nanoparticles via surface-initiated atom transfer radical polymerization

机译：表面引发的原子转移自由基聚合法合成TiO_2 / Ag /聚合物三元纳米粒子及其表征

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摘要

We report on the novel ternary hybrid materials consisting of semiconductor (TiO_2), metal (Ag) and polymer (poly(oxyethylene methacrylate) (POEM)). First, a hydrophilic polymer, i.e. POEM, was grafted from TiO_2 nanoparticles via the surface-initiated atom transfer radical polymerization (ATRP) technique. These TiO_2-POEM brush nanoparticles were used to template the formation of Ag nanoparticles by introduction of a AgCF_3SO_3 precursor and a NaBH_4 aqueous solution for reduction process. Successful grafting of polymeric chains from the surface of TiO_2 nanoparticles and the in situ formation of Ag nanoparticles within the polymeric chains were confirmed using transmission electron microscopy (TEM), UV-vis spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). FT-IR spectroscopy also revealed the specific interaction of Ag nanoparticles with the C=O groups of POEM brushes. This study presents a simple route for the in situ synthesis of both metal and polymer confined within the semiconductor, producing ternary hybrid inorganic-organic nanomaterials.
机译：我们报告了由半导体（TiO_2），金属（Ag）和聚合物（聚（甲基丙烯酸氧乙烯酯）（POEM））组成的新型三元混合材料。首先，通过表面引发的原子转移自由基聚合（ATRP）技术，从TiO_2纳米颗粒接枝了亲水聚合物，即POEM。这些TiO_2-POEM刷纳米颗粒用于通过引入AgCF_3SO_3前体和NaBH_4水溶液进行还原过程来模板化Ag纳米颗粒的形成。使用透射电子显微镜（TEM），紫外-可见光谱，X射线衍射（XRD）和X射线光电子证实了从TiO_2纳米颗粒表面成功接枝聚合物链以及在聚合物链内原位形成Ag纳米颗粒。光谱（XPS）。 FT-IR光谱也揭示了Ag纳米粒子与POEM刷的C = O基团的特异性相互作用。这项研究提出了一种简单的方法，用于原位合成限制在半导体中的金属和聚合物，从而生产出三元杂化无机-有机纳米材料。

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  • 来源
    《Applied Surface Science》 |2011年第20期|p.8301-8306|共6页
  • 作者

    Jung Tae Park; Joo Hwan Koh; Jin Ah Seo; Yong Soo Cho; Jong Hak Kim;

  • 作者单位

    Department of Chemical and Biomolecular Engineering, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, South Korea;

    Department of Chemical and Biomolecular Engineering, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, South Korea;

    Department of Chemical and Biomolecular Engineering, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, South Korea;

    Department of Materials Science and Engineering, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, South Korea;

    Department of Chemical and Biomolecular Engineering, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, South Korea;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    titanium oxide (TiO_2); graft copolymer; atom transfer radical polymerization (ATRP); silver; nanoparticles;

    机译：氧化钛（TiO_2）;接枝共聚物原子转移自由基聚合（ATRP）;银;纳米粒子;

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