Effect of transition metal elements on the structural and optical properties of ZnO nanoparticles

Bulletin of Materials Science

关键词: TM-doped ZnO-NPs;    sol–gel method;    size–strain method;    optical properties.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Undoped and transition metal (TM)-doped ZnO nanoparticles (Zn$_{0.98}$X$_{0.02}$O-NPs, X= Mn, Cr, Co and Fe) were synthesized from a metal nitrate precursor and gelatin by a sol–gel method. The compounds were synthesized at calcination temperatures of 550$^{\circ}$C for 6 h. The synthesized undoped/doped ZnO-NPs were characterized by X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). XRD results indicated that the sample products were crystalline with a hexagonal wurtzite phase. SEM images showed the ZnO-NPs nearly spherical shapes and a non-uniform shape for doped ZnO-NPs. The crystalline development in the ZnO-NPs was investigated by X-ray peak broadening. The size–strain plot (SSP) method was used to study the individual contributions of crystallite sizes and lattice strain of the undoped and doped ZnO-NPs. The obtained results showed that strain ofthe NPs plays an important role in peak broadening; moreover, the mean crystalline size of the undoped and doped ZnO-NPs estimated from the SEM and the SSP method was highly inter-correlated. Finally, optical properties ofthe samples were studied by a UV–Vis spectrometer.

【 授权许可】

CC BY