微乳液合成胶体CuO/γ-Al_2O_3及其催化芳香硝基化合物还原(英文)

• 作 者: Sachin U.NANDANWAR Mousumi CHAKRABORTY
• 机 构: Department of Chemical Engineering,S.V.National Institute of Technology,
• 出 处: 催化学报
• 发表日期: 2012年09期
• 关键词: microemulsion surfactant aromatic colloidal 芳香硝基化合物 Dispersion 微乳液 photoelectron

Monodispersed colloidal copper oxide nanoparticles were synthesized by water-in-oil microemulsion using CuCl 2·H2O and NaOH.The effect on CuO particle size was studied by varying the water-to-surfactant molar ratio,precursor concentration and molar ratio of NaOH to CuCl2.The morphology,size and size distribution of the particles were studied by transmission electron microscopy and dynamic light scattering.Dispersion destabilization of the colloidal copper oxide nanoparticles was detected by a Turbiscan apparatus.CuO/γ-Al2O3 catalysts were prepared by dispersing highly stable CuO nanoparticles on γ-alumina by mechanical stirring.The catalysts were analyzed by scanning electron microscopy,transmission electron microscopy,X-ray photoelectron,and X-ray diffraction,which confirmed the uniform dispersion of CuO on the support.The reduction of the nitro aromatic compounds,4-nitrophenol,3-nitrophenol,and 2-nitrophenol,were studied.The CuO/γ-Al2O3 catalysts were active for the reduction of these nitro aromatic compounds.

Monodispersed colloidal copper oxide nanoparticles were synthesized by water-in-oil microemulsion using CuCl 2 · H 2 O and NaOH. The effect on CuO particle size was studied by varying the water-to-surfactant molar ratio, the precursor concentration and molar ratio of NaOH to CuCl 2 . The morphology, size and size distribution of the particles were studied by transmission electron microscopy and dynamic light scattering. Dispersion destabilization of the colloidal copper oxide nanoparticles was detected by a Turbiscan apparatus. CuO / γ-Al203 catalysts were prepared by dispersing highly stable CuO nanoparticles on γ-alumina by mechanical stirring. The catalysts were analyzed by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron, and X-ray diffraction, which confirmed the uniform dispersion of CuO on the support. reduction of the nitro aromatic compounds, 4-nitrophenol, 3-nitrophenol, and 2-nitrophenol, were studied. The CuO / γ-Al2O3 catalysts were active for the reduction of these nitro aromatic compounds.