PbSe nanoparticles with dendrites have been prepared by sonoelectrochemical method from an aqueous solution containing Pb(Ac)2 and Na2SeSO3 in the presence of Trisodium Citrate (TSC). The nanoparticles were characteri...PbSe nanoparticles with dendrites have been prepared by sonoelectrochemical method from an aqueous solution containing Pb(Ac)2 and Na2SeSO3 in the presence of Trisodium Citrate (TSC). The nanoparticles were characterized by using powder X ray diffraction (XRD), transmission electron microscope (TEM) and X ray photoelectron spectroscopy(XPS). XRD patterns show the presence of diffraction peaks corresponding to the (111), (200),(220), (311), (222) planes of cubic PbSe. The TEM image shows dendrits PbSe in the presence of TSC, while in the presence of Potassium Nitrilotriacetate(NTA) the TEM image shows monodisperse spherical nanoparticles with an average size of 20nm. The effects of electrolysis and complexing agents on particle size and shape were also discussed.展开更多
Ni(OH)2 including 20%Al was synthesized by solid state reaction. The result of XRD indicated that the sample thus prepared was α Ni(OH)2, and its size and crystalline form were much poorer than those of the sample pr...Ni(OH)2 including 20%Al was synthesized by solid state reaction. The result of XRD indicated that the sample thus prepared was α Ni(OH)2, and its size and crystalline form were much poorer than those of the sample prepared by solution state reaction. TG and DTA curves showed that α Ni(OH)2 began to decompose at higher temperature than β Ni(OH)2. The electrochemical behaviorsof the sample were studied by cyclic voltammetry and constant current charge discharge experiment. It was found that the sample by solid state reaction hadmore excellent electrode reversibility, higher discharge potential and higher discharge capacity.展开更多
文摘PbSe nanoparticles with dendrites have been prepared by sonoelectrochemical method from an aqueous solution containing Pb(Ac)2 and Na2SeSO3 in the presence of Trisodium Citrate (TSC). The nanoparticles were characterized by using powder X ray diffraction (XRD), transmission electron microscope (TEM) and X ray photoelectron spectroscopy(XPS). XRD patterns show the presence of diffraction peaks corresponding to the (111), (200),(220), (311), (222) planes of cubic PbSe. The TEM image shows dendrits PbSe in the presence of TSC, while in the presence of Potassium Nitrilotriacetate(NTA) the TEM image shows monodisperse spherical nanoparticles with an average size of 20nm. The effects of electrolysis and complexing agents on particle size and shape were also discussed.
文摘Ni(OH)2 including 20%Al was synthesized by solid state reaction. The result of XRD indicated that the sample thus prepared was α Ni(OH)2, and its size and crystalline form were much poorer than those of the sample prepared by solution state reaction. TG and DTA curves showed that α Ni(OH)2 began to decompose at higher temperature than β Ni(OH)2. The electrochemical behaviorsof the sample were studied by cyclic voltammetry and constant current charge discharge experiment. It was found that the sample by solid state reaction hadmore excellent electrode reversibility, higher discharge potential and higher discharge capacity.
