Effect of Nb Doping on Morphology, Optical and Magnetic Behaviors of Ultrasonically Grown Zno Nanostructures

Abstract

ZnO nanostructures containing doped with different atom % of Nb are fabricated through ultrasound assisted hydrolysis in water. Effects of Nd incorporation on the structure, morphology, defect structure, optical, and magnetic behaviors of the nanostructures have been studied utilizing X-ray diffraction, scanning electron microscopy, photoluminescence spectroscopy and magnetometry. We demonstrate that while Nb incorporation in ZnO nanostructures drastically modify their morphology and crystallinity, it does not affect the band gap energy of of ZnO significantly. While Nb incorporation in small concentration creates higher oxygen vacancy related defects in ZnO nanostructures, which are responsible for their visible emissions, incorporation of Nb in higher concentration reduces those defect structures from the band gap of the nanostructures. While oxygen vacancies have been frequently associated to the ferromagnetic behavior of ZnO nanostructures, our results indicate that a mere presence of oxygen vacancy in Nb-doped ZnO nanostructure does not guaranty their ferromagnetic behavior.

The Effects of Mn Doping on the Structural and Optical Properties of ZnO

“…Many methods have been employed to optimize the optical, electrical, and magnetic properties of ZnO materials, and among them doping is considered as one of the most effective approaches. Thus, doping is used in order to change the band gap energy of ZnO, either by narrowing the band gap or by introducing energy levels in the band gap of semiconductor materials [17][18][19][20][21][22][23][24][25]. 3d transition metal (TM) ions such as Ti, V, Mn, Fe, Co, Ni, and Cu are generally preferred to substitute for the e-mail: ozlem.bilgili@deu.edu.tr cations of the host semiconductors.…”

Nb/Starch-Doped ZnO Nanostructures for Polluted Water Treatment and Antimicrobial Applications: Molecular Docking Analysis

“…These zinc–carboxyl traces may arise due to the Zn precursors reacting with other compounds during the synthesis process . XRD spectra of native starch revealed clear diffraction peaks at 2θ° of 10, 12, 18, and 22°, indicating a characteristic pattern of starch. , Due to the chemical composition of starch, no major changes were found in st-ZnO, but there was a slight variation in peak intensity and no peaks that corresponded to Nb were found in (2 and 4%) Nb/st-ZnO, implying that ZnO is formed in the pure wurtzite phase . The intensity of ZnO peaks decreased with increasing Nb doping, implying that a higher ratio of Nb in samples makes ZnO least crystalline .…”

“… 45 , 46 Due to the chemical composition of starch, no major changes were found in st-ZnO, but there was a slight variation in peak intensity 47 and no peaks that corresponded to Nb were found in (2 and 4%) Nb/st-ZnO, implying that ZnO is formed in the pure wurtzite phase. 48 The intensity of ZnO peaks decreased with increasing Nb doping, implying that a higher ratio of Nb in samples makes ZnO least crystalline. 20 Crystallite size was calculated using Scherer’s equation, which ranged from 11 to 22 nm.…”

Fabrication of ZnO Nanostructures Doped with Nb at Different Concentration as a Argon Sensor

“…Zinc Oxide is very suitable for transducer usage and sensor because of its relatively bio-safe and biocompatible material [13,14]. In recent times, the adjustment plan of doping ZnO with different materials such as semi-metals, noble metals, metal oxides and transition metals has been discovered as a useful approach to boost the ZnO gas sensing properties [15]. The application of niobium (Nb) doped with zinc oxide (ZnO) nanoparticles has not been discover yet.…”