Synthesis and Characterization of Pr3+doped ZnO Nanoparticles by Hydrothermal Method

Abstract

In this study, Pr dopedZnO [Zn1-x PrxO (where x = 0.01,0.02,0.03,0.04,0.05)] nanoparticles with praseodymium (Pr3+) doped were synthesized by hydrothermal technique. The hydrothermal technique for the preparation of Pr doped ZnO nanostructures at different concentrationsis to an easy, fast and efficient method. The crystal structures, crystal morphologies and optical properties of synthesized nanoparticles were characterized by X-ray diffraction (XRD), Energy dispersive X-ray (EDX), surface morphology scanning electronmicroscope (SEM) and DiffusereflactanceUV-VIS spectroscopy.XRD studies showed that all Pr doped ZnO samples had hexagona lcrystal structure and Pr3+ ions were successfully incorporated into ZnO nanostructures, and there were nopeaks of Pr or praseodymiumoxide diffraction peaks in the pattern. From the SEM images, it was seen that ZnO becomes denser and more compact as the Pr concentrationin creases in the crystal structure. In the EDX results, the presence of Zn, O and Pr peaks in the composition of the synthesized samples were detected. Energy band gaps were calculated from the optical measurements of all samples and it was observed that the calculated energy band gap values increased with the praseodymium concentration.

Keywords

• Zincoxide
• Hydrothermal method
• Optical properties
• DRS_UV-VIS

Pr3+ Katkılı ZnO Nanoparçacıkların Hidrotermal Yöntemle Sentezi ve Karakterizasyonu

Abstract

Bu çalışmada Praseodimyum(Pr3+) katkılı ZnO [Zn1-xPrxO(x=0.01,0.02,0.03,0.04,0.05)] nanoparçacıklar kolay, hızlı ve verimli bir yöntem olan hidrotermal yöntem ile sentezlenmiştir. Sentezlenen nanoparçacıkların, kristal yapıları X-ışını kırınımıyla (XRD), yüzey morfolojileri taramalı elektron mikroskobu (SEM) ve enerji dağıtıcı X-ışını dağılımlarıyla (EDX), optik özellikleri ise dağılma yansıma (DRS UV-VIS) spektroskopisi kullanılarak karakterize edilmiştir. XRD karakterizasyonunda tüm Pr3+katkılı ZnO örneklerinin hekzagonal (wurzite) yapıda oluştuğu, praseodimyum veya praseodimyumoksit’e ait herhangi bir kırınım pikinin oluşmadığı gözlemlenmiştir. SEM görüntülerinden ZnO'in kristal yapısında Pr konsantrasyonu arttıkça daha yoğun ve daha kompakt halde olduğu görülmüştür. EDX sonuçlarından ise, sentezlenen örneklerin bileşiminde Zn, O ve Pr piklerinin varlığı tespit edilmiştir. Tüm numunelerin optik ölçümlerinden enerji bant aralıkları hesaplanmış ve hesaplanan enerji bant aralığı değerlerinin, praseodimyum konsantrasyonu ile arttığı görülmüştür.

Keywords

• Çinko oksit
• Hidrotermal metot
• Optik özellikler
• DRS_UV-VIS.

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