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首页> 外文期刊>Solar Energy >Surface modified Nd doped TiO_2 nanoparticles as photocatalysts in UV and solar light irradiation
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Surface modified Nd doped TiO_2 nanoparticles as photocatalysts in UV and solar light irradiation

机译：表面改性的Nd掺杂的TiO_2纳米粒子在紫外线和太阳光照射下作为光催化剂

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Nd doped TiO_2 nanoparticles were synthesized by sol-gel method exhibiting photocatalytic activity in solar light together with UV light irradiation. Photoactivities of the catalysts were investigated in terms of degradation of Methyl Orange dye. 1.0% Nd doping appears to be optimum, yielding highest degree of degradation. Ag coating on 1.0% Nd doped sample is seen to further improve the performance of the catalyst. Nd doping and Ag coating could be ensured through the EDAX analysis of the sample. The morphological investigations of the samples reveal the presence of nanoparticles with average size of ～8 nm. The improvement in the optical properties of TiO_2 on Nd doping and Ag coating was confirmed by Diffuse Reflectance UV-Visible (DRUV) and Photoluminescence (PL) spec-troscopy. The decrease in the PL intensities together with increase in visible absorption peaks in DRUV spectra of the Nd doped and Ag coated sample implies improvement in the optical properties in comparison with undoped TiO_2. Doped and coated samples exhibited high surface area than the undoped sample which was ensured by the BET surface area analysis.
机译：采用溶胶-凝胶法合成了掺钕的TiO_2纳米颗粒，该溶胶-凝胶法在紫外光照射下在太阳光下具有光催化活性。根据甲基橙染料的降解研究了催化剂的光活性。 1.0％Nd掺杂似乎是最佳的，可产生最高程度的降解。可见在1.0％Nd掺杂的样品上涂有Ag可以进一步改善催化剂的性能。通过样品的EDAX分析可以确保Nd掺杂和Ag涂层。样品的形态学研究表明存在平均粒径约为8 nm的纳米颗粒。通过漫反射紫外可见（DRUV）和光致发光（PL）光谱证实了TiO_2在Nd掺杂和Ag涂层上的光学性能的改善。与未掺杂的TiO_2相比，掺Nd和Ag涂覆的样品的PL强度降低以及DRUV光谱中的可见吸收峰增加，意味着光学性能有所改善。掺杂和涂覆的样品显示出比未掺杂的样品高的表面积，这通过BET表面积分析得以确保。

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