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Synthesis, structure and characterization of Co doped CeO2 nanoparticles

机译：CO掺杂CeO2纳米粒子的合成，结构和表征

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Nanocrystalline Co doped CeO2 particles were synthesized using simple sol-gel method. The structural, vibrational and photoluminescence properties of synthesized nanoparticles were investigated using X-ray power diffraction (XRD), UV-visible spectroscopy, Raman spectroscopy and Photolumiscence (PL) spectroscopy. XRD showed that the lattice shrink and crystallite size decreases with doping which leads to lattice distortion and generation of strain. The bandgap is red shifted due to formation of defects states between bandgap as confirmed by urbach energy calculation. The PL intensity of Co doped CeO2 reduces which is due to the non radiative emission centres. Raman analysis showed characteristic peak at 460.8 cm~(-1) of Ce-O vibrational unit. A weak peak emerges with doping at ~ 540-640 cm~(-1) hints generation of oxygen vacancies related defects which also acts as emission quenching center.
机译：使用简单的溶胶 - 凝胶法合成纳米晶CO掺杂的CeO2颗粒。研究了合成纳米颗粒的结构，振动和光致发光性能，采用X射线功率衍射（XRD），UV可见光谱，拉曼光谱和光肿瘤（PL）光谱学研究。 XRD表明，晶格收缩和微晶尺寸随着掺杂而降低，导致晶格变形和菌株的产生。由于URBACH能量计算确认的带隙之间的缺陷状态，带隙是红色移位。 CO掺杂CEO2的PL强度降低了这是由于非辐射排放中心。拉曼分析显示CE-O振动单元460.8cm〜（-1）的特征峰。在〜540-640cm〜（-1）型氧气空位的氧气空位相关缺陷中的含量较弱的峰值呈弱峰值出现，这也充当排放猝灭中心。

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