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首页> 外文期刊>Applied Surface Science >Novel electroless process for copper coating of flyash using titania/ultraviolet-radiation/metal catalyst-system
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Novel electroless process for copper coating of flyash using titania/ultraviolet-radiation/metal catalyst-system

机译：二氧化钛/紫外线/金属催化剂体系对粉煤灰铜进行化学镀的新工艺

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摘要

A novel electroless process has been demonstrated in this investigation to coat the surface of flyash particles with a conducting metal such as copper. The conventional electroless process has been modified for this purpose by replacing the tin-palladium catalyst-system with the titania/ultraviolet-radiation/metal catalyst-system, where the metal is either copper or silver as demonstrated here. The mechanism of copper coating of flyash particles in an electroless bath, using the novel methods of surface-sensitization and surface-activation, has been systematically studied by monitoring changes in the surface-morphology, surface-chemistry, and surface-structure of flyash particles using the scanning electron microscope, energy dispersive analysis of X-rays, X-ray photoelectron spectroscope, and X-ray diffraction. It has been revealed that the novel electroless method involves coating the flyash particles with titania photocatalyst via sol-gel, which acts as a surface-sensitizer under the ultraviolet-radiation exposure for the subsequent surface-activation with the copper- or silver-clusters. The latter in turn acts as surface-catalyst for the subsequent Cu-coating in an electroless bath. The proposed mechanism of surface-sensitization and surface-activation of flyash particles using the novel catalyst-system has been compared with that using the conventional catalyst-system.
机译：在这项研究中已经证明了一种新颖的化学方法，该方法用导电金属（例如铜）覆盖飞灰颗粒的表面。为此，通过用二氧化钛/紫外线辐射/金属催化剂体系代替锡钯催化剂体系，对传统的化学方法进行了修改，此处金属是铜或银。通过监测粉煤灰颗粒的表面形态，表面化学和表面结构的变化，系统地研究了使用化学增敏和表面活化的新方法在化学浴中对粉煤灰颗粒进行铜涂层的机理。使用扫描电子显微镜，X射线能量色散分析，X射线光电子能谱仪和X射线衍射。已经发现，新的化学方法包括通过溶胶-凝胶用二氧化钛光催化剂涂覆飞灰颗粒，该溶胶-凝胶在紫外线辐射下充当表面敏化剂，随后用于铜或银簇的表面活化。后者又充当随后在无电浴中进行铜涂层的表面催化剂。所提出的使用新型催化剂体系的粉煤灰颗粒表面敏化和表面活化机理已与使用常规催化剂体系的机理进行了比较。

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  • 来源
    《Applied Surface Science》 |2009年第14期|6696-6704|共9页
  • 作者

    T. Shijitha; K.V. Baiju; S. Shukla; K. Patil; K.G.K. Warrier;

  • 作者单位

    Ceramic Technology Department, Materials and Minerals Division (MMD), National Institute for Interdisciplinary Science and Technology (NI1ST), Council of Scientific and Industrial Research (CSIR), Industrial Estate P.O., Pappanamcode, Thiruvananthapuram 695 019, Kerala, India;

    Ceramic Technology Department, Materials and Minerals Division (MMD), National Institute for Interdisciplinary Science and Technology (NI1ST), Council of Scientific and Industrial Research (CSIR), Industrial Estate P.O., Pappanamcode, Thiruvananthapuram 695 019, Kerala, India;

    Ceramic Technology Department, Materials and Minerals Division (MMD), National Institute for Interdisciplinary Science and Technology (NI1ST), Council of Scientific and Industrial Research (CSIR), Industrial Estate P.O., Pappanamcode, Thiruvananthapuram 695 019, Kerala, India;

    Center for Materials Characterization, National Chemical Laboratory (NCL), Council of Scientific and Industrial Research (CSIR), Pune 411 008, Maharashtra, India;

    Ceramic Technology Department, Materials and Minerals Division (MMD), National Institute for Interdisciplinary Science and Technology (NI1ST), Council of Scientific and Industrial Research (CSIR), Industrial Estate P.O., Pappanamcode, Thiruvananthapuram 695 019, Kerala, India;

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  • 正文语种 eng
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  • 关键词

    copper; electroless; flyash; photocatalysis; sol-gel; titania;

    机译：铜;无电飞灰光催化;溶胶凝胶二氧化钛;

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