Synthesis and spectroscopic characterizations of copper ions doped zinc borate nanoparticles

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• 作者：Ch.Venkata Reddy^a ; ^{cvrphy@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; G.V.S.S. Sarma^b ; R.V.S.S.N. Ravikumar^b ; Jaesool Shim^a ; ^{jshim@ynu.ac.kr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Co-precipitation ; X-ray diffraction ; Luminescence ; Electron paramagnetic ; resonance (EPR) ; Bonding parameters
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：127
• 期：10
• 页码：4536-4540
• 全文大小：1251 K

文摘

Spectral investigations of Cu²⁺-doped zinc borate nanoparticles have been reported in this paper. The as-prepared nanoparticles are characterized using powder XRD, SEM with EDS, HRTEM, optical absorption, electron paramagnetic resonance (EPR), photoluminescence (PL) and FT-IR measurements. The powder XRD patterns confirm the monoclinic crystal structure of the prepared nanoparticles. From the optical absorption spectrum, it is observed that a single broad absorption band is observed. The EPR result confirms that the Cu²⁺ ions enter distorted octahedral site symmetry at room temperature. The bonding between the metal ion and ligands is partially covalent nature. The PL spectrum exhibits emission bands in the ultraviolet and visible regions at room temperature. The CIE chromaticity coordinates indicate the prepared material shows the light in visible region. The bands observed at 475 and 549 cm⁻¹ are attributed to metal ions-oxygen and BO₄ tetrahedron in the molecular structure.