• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Research >Preparation and characterization of heterojunction semiconductor YFeO_3/TiO_2 with an enhanced photocatalytic activity
【24h】

Preparation and characterization of heterojunction semiconductor YFeO_3/TiO_2 with an enhanced photocatalytic activity

机译：具有增强光催化活性的异质结半导体YFeO_3 / TiO_2的制备与表征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

YFeO_3/TiO_2 heterojunction semiconductors were prepared by the milling-annealing method. Effects of structure and surface phase by annealing temperature and TiO_2 weight content were investigated. The physical and photophysical properties of heterojunction semiconductors were characterized by x-ray diffraction (XRD), UV-visible diffraction (UV-vis/DRS), and x-ray photoelectron spectroscopy (XPS), N_2 adsorption. YFeO_3 is presented as p-type semiconductor and disperses on the surface of n-type TiO_2 to constitute a heterojunction composite. Results show that the presence of p-n junction not only has visible light harvesting but potential force for hole-electron pair separation. A preliminary investigation of photodegradation effect on Orange II showed that YFeO_3/TiO_2 heterojunction semiconductors exhibited better photocatalytic properties than the single phase of YFeO_3 or TiO_2. The ideal heterojunction semiconductor composition was ω (TiO_2) = 0.9 sample annealed at 600 ℃. The mechanism of the electric-field-driven electron-hole separation initiated by the chemically bonded p-n heterojunction and enhanced photocatalytic activity were discussed.
机译：采用球磨退火法制备了YFeO_3 / TiO_2异质结半导体。研究了退火温度和TiO_2重量含量对结构和表面相的影响。异质结半导体的物理和光物理性质通过X射线衍射（XRD），紫外可见衍射（UV-vis / DRS）和X射线光电子能谱（XPS），N_2吸附进行表征。 YFeO_3呈现为p型半导体，并分散在n型TiO_2的表面上构成异质结复合物。结果表明，p-n结的存在不仅具有可见光收集，而且具有空穴-电子对分离的潜在作用力。对Orange II的光降解作用的初步研究表明，YFeO_3 / TiO_2异质结半导体表现出比YFeO_3或TiO_2单相更好的光催化性能。理想的异质结半导体组成是在600℃退火的ω（TiO_2）= 0.9样品。讨论了由化学键合的p-n异质结引发的电场驱动的电子-空穴分离机理和增强的光催化活性。

著录项

  • 来源
    《Journal of Materials Research》 |2010年第1期|104-109|共6页
  • 作者

    Xiaomeng Lu; Jun Liu; Jianjun Zhu; Deli Jiang; Jimin Xie;

  • 作者单位

    School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China;

    School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China;

    School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China;

    School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China;

    School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, People's 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号