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Investigation of Gd-doped mesoporous TiO_2 spheres for environmental remediation and energy applications

机译：Gd掺杂介孔TiO_2球在环境修复和能源应用中的研究

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摘要

The TiO2 is considered by many as the most versatile material with a very large number of applications in many fields that includes photocatalysis and dye-sensitized solar cell (DSSC). But it is active mainly in the UV region of the spectrum due to its large band gap, around 3.2 eV, which causes low photon absorption. This limitation can be overcome by doping TiO2 with a lanthanide which enhances the absorption of visible photons. In this report, we investigated pure mesoporous TiO2 and Gd-doped mesoporous TiO2 spheres to analysis its photocatalytic and energy conversion efficiency. Gadolinium was chosen due to its stable 4f orbitals state of Gd3+ ions. The XRD spectra and Raman spectra analysis confirms the presence of TiO2. It was noted that only anatase was in all the synthesised samples. The morphological analysis confirms FESEM, HRTEM and Element mapping analysis confirms the formation of mesoporous structures with gadolinium incorporated on the mesosphere's surface. The synthesis samples' photocatalytic activity was studied and sample with 1 mmol of Gd was found to perform best among all the samples. A DSSC study was also conduct and Gd-doped TiO2 was found to out-perform the TiO2.
机译：TiO2被认为是最通用的材料，在包括光催化和染料敏化太阳能电池（DSSC）在内的许多领域中都有大量应用。但由于其较大的带隙（约3.2 eV），它主要在光谱的UV区具有活性，从而导致低的光子吸收。通过限制镧系元素掺杂TiO2可以克服这一局限，镧系元素可增强可见光子的吸收。在本报告中，我们研究了纯中孔TiO2和掺Gd的中孔TiO2球，以分析其光催化和能量转换效率。选择d是因为它具有稳定的Gd3 +离子的4f轨道态。 XRD光谱和拉曼光谱分析证实了TiO 2的存在。注意到在所有合成样品中只有锐钛矿。形态分析证实了FESEM，HRTEM，元素图谱分析证实了中孔表面掺入了g的中孔结构的形成。研究了合成样品的光催化活性，发现含1 mmol Gd的样品在所有样品中表现最好。还进行了DSSC研究，发现掺Gd的TiO2的性能优于TiO2。

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  • 来源
    《Applied Surface Science》 |2019年第30期|883-892|共10页
  • 作者

    Singh Kamaljeet; Harish S.; Archana J.; Navaneethan M.; Shimomura M.; Hayakawa Y.;

  • 作者单位

    Shizuoka Univ, Grad Sch Integrated Sci & Technol, Naka Ku, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328011, Japan;

    Shizuoka Univ, Res Inst Elect, Naka Ku, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328011, Japan|SRM Inst Sci & Technol, Dept Phys & Nanotechnol, Funct Mat & Energy Devices Lab, Chennai 603203, Tamil Nadu, India;

    SRM Inst Sci & Technol, Dept Phys & Nanotechnol, Funct Mat & Energy Devices Lab, Chennai 603203, Tamil Nadu, India;

    SRM Inst Sci & Technol, Dept Phys & Nanotechnol, Funct Mat & Energy Devices Lab, Chennai 603203, Tamil Nadu, India|SRM Inst Sci & Technol, Nanotechnol Res Ctr, Fac Engn & Technol, Chennai 603203, Tamil Nadu, India;

    Shizuoka Univ, Grad Sch Integrated Sci & Technol, Naka Ku, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328011, Japan;

    Shizuoka Univ, Grad Sch Integrated Sci & Technol, Naka Ku, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328011, Japan|Shizuoka Univ, Res Inst Elect, Naka Ku, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328011, Japan;

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  • 正文语种 eng
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  • 关键词

    Gadolinium; TiO2; Mesoporous; Photocatalysis; Dye sensitized solar cell; N719;

    机译：d;TiO2;介孔;光催化;染料敏化太阳能电池;N719;

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