Hematite (α-Fe2O3) nanopowder was synthesized from 0.1 mol·L-1 FeCl3 solution by sonochemical hydrolysis method, and characterized by X-ray diffraction (XRD), transmission electron micrograph (TEM), Fourier tran...Hematite (α-Fe2O3) nanopowder was synthesized from 0.1 mol·L-1 FeCl3 solution by sonochemical hydrolysis method, and characterized by X-ray diffraction (XRD), transmission electron micrograph (TEM), Fourier transform infrared (FTIR), Fourier transform Raman (FT-Raman) and X-ray photoelectron spectroscopy (XPS). The results showed that the spherical, well-dispersed α-Fe2O3 nanopowder was obtained with the average size of 20 nm. The possible mechanism for the formation of α-Fe2O3 nanoparticals was also discussed.展开更多
A series of ultrafine amorphous NiCoB alloys was prepared by chemical reduction method.XRD,TEM and BET techniques were used to investigate the phase,morphology,particle size and activity of the catalyst for the hydrog...A series of ultrafine amorphous NiCoB alloys was prepared by chemical reduction method.XRD,TEM and BET techniques were used to investigate the phase,morphology,particle size and activity of the catalyst for the hydrogenation of soybean oil.The results indicated that their activities are higher than that of Raney Ni,Moreover,with the increasing of Ni/Co molar ration,the catalytic activity of the catalysts versus Ni/Co ration passe through a maximum at Ni/Co=0.5,at which the grain size and specific surface area were 20nm and 46.9m2·g-1,respectively.As an high effective environmental amicable catalyst,ultrafine amorphous NiCoB alloys can be used to the hydrogenation of soybean oil.展开更多
文摘Hematite (α-Fe2O3) nanopowder was synthesized from 0.1 mol·L-1 FeCl3 solution by sonochemical hydrolysis method, and characterized by X-ray diffraction (XRD), transmission electron micrograph (TEM), Fourier transform infrared (FTIR), Fourier transform Raman (FT-Raman) and X-ray photoelectron spectroscopy (XPS). The results showed that the spherical, well-dispersed α-Fe2O3 nanopowder was obtained with the average size of 20 nm. The possible mechanism for the formation of α-Fe2O3 nanoparticals was also discussed.
文摘A series of ultrafine amorphous NiCoB alloys was prepared by chemical reduction method.XRD,TEM and BET techniques were used to investigate the phase,morphology,particle size and activity of the catalyst for the hydrogenation of soybean oil.The results indicated that their activities are higher than that of Raney Ni,Moreover,with the increasing of Ni/Co molar ration,the catalytic activity of the catalysts versus Ni/Co ration passe through a maximum at Ni/Co=0.5,at which the grain size and specific surface area were 20nm and 46.9m2·g-1,respectively.As an high effective environmental amicable catalyst,ultrafine amorphous NiCoB alloys can be used to the hydrogenation of soybean oil.
