In this study, a simple hydrazine assisted wet chemical method was used to prepare pure and Ti doped ZnO nanorods . The structural properties of pure and Ti doped ZnO nanorods were investigated by XRD analysis. Williamson-Hall (W–H) method was used to determine the crystallite size , strain and dislocation density of the samples. TEM analysis revealed rod like morphology for Ti doped ZnO nanoparticles . The presence of elements such as Zn, Ti and O of the doped sample was confirmed by EDS. XPS spectrum suggests that Ti 4+ ions well substitute Zn 2+ ions in doped nanocrystal . The Raman study further established the formation of ZnO wurtzite structure in both pure and Ti doped ZnO nanorods. The band gap of pure and Ti doped ZnO nanorods were estimated by the Tauc relation as 3.03 eV and 2.91 eV respectively. From the PL spectra, it is observed that the intensity of the polychromatic defect emissions of Ti doped ZnO nanorods is higher than pure ZnO, with some additional defect emissions. The antibacterial activity of Ti doped ZnO nanorods slightly decreased against gram-positive and gram-negative bacteria when compared to pure ZnO. • Synthesis of pure and Ti doped ZnO nanorods by a facile hydrazine assisted wet chemical method. • Confirmation of substitution of Ti 4+ ions into Zn 2+ ions in doped nanocrystal from XPS spectrum. • The band gap of pure and Ti doped ZnO nanorods were estimated by the Tauc relation as 3.03 eV and 2.91 eV. • Intensity of the polychromatic defect emissions of Ti doped ZnO nanorods is higher than pure ZnO. • The antibacterial activity of Ti doped ZnO nanorods is slightly lower than pure ZnO and higher than certain doped ZnO nanostructures. 

Characterization and antibacterial activity of Ti doped ZnO nanorods prepared by hydrazine assisted wet chemical route

Effect of Ti-doping on photocatalytic activity of ZnO nanocatalyst under sunlight irradiation

Innovation in materials science is important to provide society with new developments and help engineers deliver more reliable products that are also cost-effective. Brass has a vast range of its applications, while its single-phase structure (α-brass) is more flexible towards modification under ion dose. In this study, the α-brass (64%Cu; 36%Zn) was ion-implanted by 500 keV energy Si-ions, whereas four different doses were used with the main aim of reforming its structural, surface morphological and mechanical properties. SEM analysis revealed that defects were created on the implanted surface in the form of pits, pores, cavities and craters. An obvious decrease occurs in crystallite size and was found dropped from 44.351 to 24.908 nm. The intensity ratio for the plane (2 2 0) was found to be decreased after Si-ion implantation. Whereas for the planes (1 1 1), (2 0 0) and (3 1 1) fluctuating behavior was noted. Hardness of the surface was found higher after Si-ion implantation due to induced defects on the surface. Overall, the Si-ions distorted the surface, induced the strain, reduced the crystalline behavior of brass and improved the hardness.

Si-ion implantation effects on the surface hardness and microstructure of brass alloy

Synthesis, structural, photoluminescence, ultraviolet blocking and antibacterial performances of Ba-doped ZnO nanostructures

Ti-doped ZnO (TixZn1-xO x = 0.00, 0.05, 0.10, 0.15) nanoparticles have been synthesized through co-precipitation approach. X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL), UV–Visible spectroscopy, and Vibrating Sample Magnetometer (VSM) have been used to characterize the samples. X-Ray Diffraction (XRD) analysis manifested the hexagonal wurtzite structure. The crystallite size decreased from 37 to 29 nm as dopant concentration is increased. Fourier transform infrared analysis showed the absorption bands of ZnO, with few within the intensities. SEM investigation showed the irregular shape and agglomeration of the particles. Ti, Zn, and O composition were determined from EDX analysis and confirmed the purity of the samples. PL spectra showed a near-band edge emission and visible emission. Vibrating sample magnetometer (VSM) demonstrated pure and doped samples exhibited ferromagnetism behavior at room temperature.

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K. Balachandra Kumar

Papers

Investigation of Ti doping on the structural, optical, and magnetic properties of ZnO nanoparticles