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首页> 外文期刊>Materials Chemistry and Physics. >Preparation and characterization of S-doped TiO_2 nanoparticles, effect of calcination temperature and evaluation of photocatalytic activity
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Preparation and characterization of S-doped TiO_2 nanoparticles, effect of calcination temperature and evaluation of photocatalytic activity

机译：S掺杂TiO_2纳米粒子的制备，表征，煅烧温度的影响及光催化活性的评价

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摘要

S-doped TiO_2 photocatalyst with high activity of visible light was prepared by modified sol-gel method using thiourea as sulfur source. The catalyst was characterized by XRD, FT-IR, DRS, SEM-EDX and TEM analysis. The undoped and S-doped TiO_2 nanoparticles calcined at 500 ℃ contained only anatase phase. Effects of calcination temperature showed formation of rutile phase get started at 650-700 ℃ for undoped TiO_2 and 750 ℃ for S-doped TiO_2 . The activity of the catalyst was examined by photodegradation of methyl orange in aqueous solution under both visible and UV light and it was found to be depending on the amount of S. The most activity was observed for 0.05% and 0.1 % S-doped TiO_2 under visible and UV light, respectively. Results showed for undoped TiO_2 , calcined samples at 650 and 550 ℃ under visible and UV light are the best catalysts, respectively. Also for 0.05% S-doped TiO_2 , calcined sample at 500 ℃ is the best catalyst under UV and visible light.
机译：以硫脲为硫源，采用改进的溶胶-凝胶法制备了具有高可见光活性的S掺杂TiO_2光催化剂。通过XRD，FT-IR，DRS，SEM-EDX和TEM分析对催化剂进行了表征。在500℃下煅烧的未掺杂和S掺杂的TiO_2纳米颗粒仅含有锐钛矿相。煅烧温度的影响表明，金红石相的形成始于650-700℃（未掺杂的TiO_2）和750℃（S掺杂的TiO_2）。在可见光和紫外光下，通过水溶液中甲基橙的光降解检测了催化剂的活性，发现该活性取决于S的量。在0.05％和0.1％的S掺杂的TiO_2下，观察到最大的活性。可见光和紫外线。结果表明，对于未掺杂的TiO_2，可见光和紫外光下分别在650和550℃煅烧的样品是最佳的催化剂。同样，对于0.05％S掺杂的TiO_2，在500℃下煅烧的样品在紫外线和可见光下也是最好的催化剂。

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  • 来源
    《Materials Chemistry and Physics.》 |2009年第3期|376-382|共7页
  • 作者

    M. Hamadanian; A. Reisi-Vanani; A. Majedi;

  • 作者单位

    Department of Chemistry, Faculty of Science, University of Kashan, Kashan, Islamic Republic of Iran;

    Department of Chemistry, Faculty of Science, University of Kashan, Kashan, Islamic Republic of Iran;

    Department of Chemistry, Faculty of Science, University of Kashan, Kashan, Islamic Republic of Iran;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    sol-gel growth; nano-structures; semiconductors; electron microscopy;

    机译：溶胶-凝胶生长;纳米结构半导体;电子显微镜;

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