Influence of N-Methylaniline on physicochemical and optical properties ofγ-Al₂O₃nanoparticles

Influence of N-Methylaniline (NMA) on the physicochemical and optical properties of γ -Al 2 O 3 nanoparticles were investigated using XRD, FTIR, UV–vis DRS, TEM, AFM, PL, TGA and the results were reported here. The TEM results were showed that the surface morphology of NMA capped γ -Al 2 O 3 nanoparticles has sphere like nanostructures. The size of the nanoparticles was controlled by the concentration of NMA and thus modified the geometry of γ -Al 2 O 3 nanoparticles from primary (∼8 nm) to spherical nanoparticles (∼30-50 nm). XRD results were confirmed the enhancement of crystallite size of γ -Al 2 O 3 proportionally with the NMA molar concentration. FTIR results were confirmed the formation of NMA capped γ -Al 2 O 3 nanospheres by N-H stretching and O-H bending vibrations. The PL results were indicated that, the emission intensities at 589 nm (yellow emission) and 713 nm (orange-red emission) were reduced after the capping of NMA for the defects F 2 2 + center and non-bridging oxygen hole center (NBOHC).