Small-diameter ZnO nanorods with lengths of 35-50 nm were synthesized by solvothermal treatment route at low temperature(70℃)for 48,96 and 144 hours using polyvinylpyrrolidone(PVP)as stabilizing agent.The optical ban...Small-diameter ZnO nanorods with lengths of 35-50 nm were synthesized by solvothermal treatment route at low temperature(70℃)for 48,96 and 144 hours using polyvinylpyrrolidone(PVP)as stabilizing agent.The optical band gap energy of nanorods was calculated by Tauc’s approximation,obtaining values of 3.30-3.21 eV.By X-ray diffraction(XRD)it was determined that ZnO samples crystallize in Wurtzite hexagonal structure and present changes in lattice parameters.Also XRD patterns reveal a preferential growth of ZnO nanostructures along the plane with Miller indices(002).Stabilization process of ZnO nanoparticles and nanorods was studied by Fourier-transform infrared(FT-IR)spectroscopy,determining that the presence of amide group in polymer structure confers the ability to interact electrostatically with ZnO nanostructures surface.FT-IR results revealed that O and N atoms of amide group interact strongly with the surface of ZnO nanostructures.The length/diameter ratio of ZnO nanorods at 48 and 96 hours of reflux was 2.3 and 2.7,respectively.展开更多
文摘Small-diameter ZnO nanorods with lengths of 35-50 nm were synthesized by solvothermal treatment route at low temperature(70℃)for 48,96 and 144 hours using polyvinylpyrrolidone(PVP)as stabilizing agent.The optical band gap energy of nanorods was calculated by Tauc’s approximation,obtaining values of 3.30-3.21 eV.By X-ray diffraction(XRD)it was determined that ZnO samples crystallize in Wurtzite hexagonal structure and present changes in lattice parameters.Also XRD patterns reveal a preferential growth of ZnO nanostructures along the plane with Miller indices(002).Stabilization process of ZnO nanoparticles and nanorods was studied by Fourier-transform infrared(FT-IR)spectroscopy,determining that the presence of amide group in polymer structure confers the ability to interact electrostatically with ZnO nanostructures surface.FT-IR results revealed that O and N atoms of amide group interact strongly with the surface of ZnO nanostructures.The length/diameter ratio of ZnO nanorods at 48 and 96 hours of reflux was 2.3 and 2.7,respectively.
