Comparison of Effect of Nickel Concentration on Crystallographic Structure and Morphology of Zinc Oxide Nanopowders

Abstract

In this study, we work on the effect of Ni doping on the crystallographic structure, morphology, and optical properties of ZnO nanoparticles. ZnO and Ni doped ZnO nanopowders were synthesized by sol-gel technique with different Ni concentration (5%, 10%, and 15%). The crystallographic structure was characterized by conventional X-ray Diffraction (XRD) technique. The results confirm that Ni doping does not change the single hexagonal phase existing in pure ZnO whereas in high Ni doping concentration (10% and 15%) causes to grow a secondary phase due to presence of NiO. FE-SEM, EDX, FTIR techniques are used for morphology, elemental, and chemical analyses of the samples. Optical properties of the samples are investigated by using UV-VIS spectrophotometer.

Solution-Processable Growth and Characterization of Dandelion-like ZnO:B Microflower Structures

“…When this growth progresses towards the formation of the same type of crystal faces, they form a free surface. This mode of growth represents a choice of orientation and leads to competitive growth [21][22][23][24][25][26][27][28]. The preferred orientation for ZnO micro-scale rods is (002), along the c-axis.…”

“…Researchers have intensively studied ZnO thin films and powders, including those doped with Cr, Mn, Fe, Co, Ni, Cu, Al, Ga, Cd, In, B, and N. The purpose of the dopant is to improve the structural, optical, and electrical properties of ZnO, and to adjust the band gap and super-cage-nano heterostructures with less cage mismatch [7,8,[10][11][12][13][14][15][16][17][21][22][23][24][25][26]. Devices based on ZnO nanostructures are alternatives to Group III-V semiconductor compounds such as GaN-, and GaAs-based devices.…”