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首页> 外文期刊>Journal of porous materials >Structural and optical characterizations of (Cu, Ce) iso-co-doped ZnO aerogel structures grown in supercritical ethanol
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Structural and optical characterizations of (Cu, Ce) iso-co-doped ZnO aerogel structures grown in supercritical ethanol

机译：（Cu，Ce）异掺杂ZnO气凝胶结构的结构和光学表征在超临界乙醇中生长

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摘要

Undoped, Ce-doped, Cu-doped and (Ce, Cu) co-doped ZnO aerogels were synthesized by sol-gel process in supercritical conditions of ethanol. [Cu]/[Zn] and [Ce]/[Zn] atomic ratios were fixed at 0.02 (2%). The aerogels were investigated without any additional treatments by using X-ray diffraction (XRD), UV-visible spectrophotometry, scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), thermal gravimetric analysis (TGA), Fourier transforms infrared spectroscopy (FTIR) and photoluminescence spectroscopy. XRD results revealed that all the samples are well crystallized in hexagonal wurtzite structure. TGA and EDS measurements showed that highly pure aerogels are prepared. SEM analysis indicated that the morphology of the samples is dependent on Cu and Ce dopants. From UV-visible spectroscopy analyses, it was shown that the absorption and the band gap of the aerogels are strongly affected by Ce and Cu dopants. FTIR spectra demonstrated that co-doping induces a shift of Zn-O bond vibration band toward low wavenumbers. The room temperature photoluminescence spectra put into evidence that Ce and Cu doping influence the visible emission intensity. In particular, the iso-codoping leads to the appearance of a blue emission band at 443nm.
机译：未掺杂，Ce掺杂，Cu掺杂和（Ce，Cu）共掺杂的ZnO气凝胶通过溶胶 - 凝胶法在乙醇的超临界条件下合成。 [Cu] / [Zn]和[Ce] / [Zn]原子比为0.02（2％）。通过使用X射线衍射（XRD），UV可见分光光度法，扫描电子显微镜（SEM），能量分散X射线光谱（EDS），热重分析（TGA），傅里叶变换，研究了气凝胶而没有任何额外的处理。红外光谱（FTIR）和光致发光光谱。 XRD结果显示，所有样品在六边形紫立岩结构中均匀地结晶。 TGA和EDS测量显示，制备高纯纯润孔。 SEM分析表明样品的形态取决于Cu和Ce掺杂剂。从紫外线可见光谱分析中，显示出通过Ce和Cu掺杂剂的吸收和带状隙强烈影响。 FTIR光谱证明了共掺杂引起Zn-O键振动带向低波纹的偏移。室温光致发光光谱投入证据，即Ce和Cu掺杂会影响可见光发射强度。特别地，ISO编码导致在443nm处的蓝色发射带的外观。

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  • 来源
    《Journal of porous materials》 |2019年第3期|755-763|共9页
  • 作者

    Djouadi D.; Slimi O.; Hammiche L.; Chelouche A.; Touam T.;

  • 作者单位

    Univ Bejaia Fac Technol Lab Genie Environm Bejaia 06000 Algeria;

    Univ Bejaia Fac Technol Lab Genie Environm Bejaia 06000 Algeria;

    Univ Bejaia Fac Technol Lab Genie Environm Bejaia 06000 Algeria;

    Univ Bejaia Fac Technol Lab Genie Environm Bejaia 06000 Algeria;

    Univ Badji Mokhtar Annaba Lab Semicond BP 12 Annaba 23000 Algeria;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ZnO aerogels; Supercritical drying; Copper; Cerium; Iso-codoping;

    机译：Zno Aerogels;超临界干燥;铜;铈;ISO编码;

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