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首页> 外文期刊>RSC Advances >Synthesis, characterization and visible light photocatalytic activity of Cr3+, Ce3+ and N co-doped TiO2 for the degradation of humic acid
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Synthesis, characterization and visible light photocatalytic activity of Cr3+, Ce3+ and N co-doped TiO2 for the degradation of humic acid

机译：Cr3 +，Ce3 +和N共掺杂TiO2的合成，表征和可见光光催化活性用于腐殖酸的降解

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摘要

The synthesis, characterization and photocatalytic activity of Cr3+ and Ce3+ co-doped TiON (N-doped TiO2) for the degradation of humic acid with exposure to visible light is reported. The synthesized bimetal (Cr3+ + Ce3+) modified TiON (Cr-Ce/TiON), with an evaluated bandgap of 2.1 eV, exhibited an enhanced spectral response in the visible region as compared to pure and Ce3+ doped TiON (Ce/TiON). The XRD analysis revealed the insertion of Cr3+ and Ce3+ in the crystal lattice along with Ti4+ and N that resulted in the formation of a strained TiON anatase structure with an average crystallite size of similar to 10 nm. Raman analysis also supported the formation of stressed rigid structures after bimetal doping. HRTEM confirmed the homogeneous distribution of both the doped metallic components in the crystal lattice of TiON without the formation of surface oxides of either Cr3+ or Ce3+. Electron energy loss spectroscopy (EELS) analysis revealed no change in the oxidation of either Cr or Ce during the synthesis. The synthesized Cr-Ce/TiON catalyst exhibited appreciable photocatalytic activity for the degradation of humic acid on exposure to visible light. Additionally, a noticeable mineralization of carbon rich humic acid was also witnessed. The photocatalytic activity of the synthesized catalyst was compared with pristine and Ce3+ doped TiON.
机译：据报道了Cr3 +和Ce3 +共掺杂（N-掺杂TiO2）的合成，表征和光催化活性，用于暴露于可见光的腐殖酸脱落。与纯和Ce3 +掺杂（CE / TiON）相比，合成的双金属（Cr-Ce / Tion）具有2.1eV的评估带隙，在可见区域中表现出增强的光谱响应。 XRD分析表明，在晶格中插入Cr3 +和Ce3 +以及Ti4 +和N，导致形成应变锐钛矿结构，其平均微晶尺寸类似于10nm。拉曼分析还支持双金属掺杂后的压力刚性结构的形成。 HRTEM证实掺杂金属组分在晶格中的均匀分布而不形成Cr3 +或Ce3 +的表面氧化物。电子能量损失光谱（EEL）分析显示在合成期间Cr或Ce的氧化没有变化。合成的Cr-Ce / TiON催化剂表现出可观的光催化活性，用于腐殖酸暴露于可见光。另外，还目睹富含碳富含腐殖酸的明显矿化。将合成催化剂的光催化活性与原始和Ce3 +掺杂进行比较。

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  • 来源
    《RSC Advances》 |2015年第41期|共10页
  • 作者

    Rashid S. G.; Gondal M. A.; Hameed A.; Aslam M.; Dastageer M. A.; Yamani Z. H.; Anjum D. H.;

  • 作者单位

    King Fahd Univ Petr &

    Minerals Dept Phys Laser Res Grp Dhahran 31261 Saudi Arabia;

    King Fahd Univ Petr &

    Minerals Dept Phys Laser Res Grp Dhahran 31261 Saudi Arabia;

    King Abdulaziz Univ Ctr Excellence Environm Studies Jeddah 21413 Saudi Arabia;

    King Abdulaziz Univ Ctr Excellence Environm Studies Jeddah 21413 Saudi Arabia;

    King Fahd Univ Petr &

    Minerals Dept Phys Laser Res Grp Dhahran 31261 Saudi Arabia;

    King Fahd Univ Petr &

    Minerals Dept Phys Laser Res Grp Dhahran 31261 Saudi Arabia;

    KAUST Appl Surface Sci Nanofabricat Imaging &

    Character Thuwal 235996900 Saudi Arabia;

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  • 正文语种 eng
  • 中图分类 化学;
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