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首页> 外文期刊>Journal of Materials Research >Preparation and visible-light photocatalyst activity of nanometric- sized TiO_(2-x)N_y powders from a two-microemulsion process
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Preparation and visible-light photocatalyst activity of nanometric- sized TiO_(2-x)N_y powders from a two-microemulsion process

机译：双微乳液法制备纳米级TiO_（2-x）N_y粉末及其可见光催化活性

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摘要

Nanometric-sized nitrogen-doped titanium oxide (TiO_(2-x)N_y) powders were synthesized by the two-microemulsion technology. The dried precursor precipitate was characterized by differential thermal analysis/thermogravimetric analysis, Raman spectroscopy, transmission electron microscopy, Brunauer-Emmet-Teller surface area analyzer, and x-ray photoelectron spectrometer (XPS), and the mechanisms for the evolution of TiO_(2-x)N_y powders in this process were proposed and discussed in the context of the microstructure. It shows that a higher pH value solution results in obtaining a small size and much more homogeneous TiO_(2-x)N_y powder after calcinations. The powder prepared from a solution of pH 10-11 and calcined at 500 ℃ has a particle size of ～4-6 nm with a specific surface area of 160 m~2/g and exhibits a pure phase of anatase containing ～5 mol% of N evidenced by XPS. However, the nanometric-sized TiO_(2-x)N_y powder shows the photocatalytic degradation of methylene blue solution effectively by exposing the powders in aqueous solution under visible light.
机译：利用微乳技术合成了纳米级的氮掺杂二氧化钛（TiO_（2-x）N_y）粉末。通过差示热分析/热重分析，拉曼光谱，透射电子显微镜，Brunauer-Emmet-Teller表面积分析仪和X射线光电子能谱仪（XPS）表征干燥的前体沉淀物，以及TiO_（2）的生成机理。 -x）N_y在此过程中的粉末是在微观结构的背景下提出和讨论的。结果表明，较高的pH值溶液可导致煅烧后获得较小尺寸且均匀得多的TiO_（2-x）N_y粉末。由pH 10-11的溶液制备并在500℃下煅烧的粉末，其粒径约为〜4-6 nm，比表面积为160 m〜2 / g，并呈现出一种纯相，其锐钛矿含量约为5％mol XS证明的N的总数。然而，纳米尺寸的TiO_（2-x）N_y粉末通过将粉末暴露于可见光下而有效地显示了亚甲基蓝溶液的光催化降解。

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  • 来源
    《Journal of Materials Research》 |2009年第8期|2574-2583|共10页
  • 作者

    Wein-Duo Yang; Wen-Chung Lin; Chunhui Yang; Zen-Ja Chung; I-Lun Huang;

  • 作者单位

    Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan, Republic of China;

    Department of Environmental Engineering, Kun Shan University, Tainan 710, Taiwan, Republic of China;

    Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, People's Republic of China;

    Chemical Engineering Division, Institute of Nuclear Energy Research, Lungtan, Taoyuan 325, Taiwan, Republic of China;

    Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan, Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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