A simple,mild,and time-saving method is employed to synthesize Ag-SiO2 composite nanospheres with Ag nanoparticles uniformly distributed on the surface of SiO2 nanoparticles.The chemical elements and the morphology of...A simple,mild,and time-saving method is employed to synthesize Ag-SiO2 composite nanospheres with Ag nanoparticles uniformly distributed on the surface of SiO2 nanoparticles.The chemical elements and the morphology of Ag-SiO2 composite nanospheres were analyzed with transmission electron microscopy(TEM),X-ray power diffraction(XRD),and X-ray photoelectron spectroscopy(XPS).On the surface of Ag-SiO2 composite nanospheres,silane coupling agent(KH-550)is introduced as an intermediary to connect the surfaces of SiO2 nanospheres and Ag nanoparticles,which is also helpful for avoiding the aggregation of Ag nanoparticles.It is found that Ag-SiO2 composite nanospheres have very good catalytic properties for the reduction of organic dyes,which may have potential application in wastewater treatment.展开更多
Oleate/PSt/TiO 2 nanosphere composites were prepared by seeding polymerization and characterized by TEM、FTIR、DSC and TGA. The antiwear ability of the oleate/PSt/TiO 2 nanospheres as additives in base oil was evaluat...Oleate/PSt/TiO 2 nanosphere composites were prepared by seeding polymerization and characterized by TEM、FTIR、DSC and TGA. The antiwear ability of the oleate/PSt/TiO 2 nanospheres as additives in base oil was evaluated. The results indicate the oleate/PSt/TiO 2 nanosphere composites have good wear and extreme pressure resistance.展开更多
基金supported by the National Natural Science Foundation of China(11174190)the Fundamental Research Funds for the Central Universities(GK201101006)
文摘A simple,mild,and time-saving method is employed to synthesize Ag-SiO2 composite nanospheres with Ag nanoparticles uniformly distributed on the surface of SiO2 nanoparticles.The chemical elements and the morphology of Ag-SiO2 composite nanospheres were analyzed with transmission electron microscopy(TEM),X-ray power diffraction(XRD),and X-ray photoelectron spectroscopy(XPS).On the surface of Ag-SiO2 composite nanospheres,silane coupling agent(KH-550)is introduced as an intermediary to connect the surfaces of SiO2 nanospheres and Ag nanoparticles,which is also helpful for avoiding the aggregation of Ag nanoparticles.It is found that Ag-SiO2 composite nanospheres have very good catalytic properties for the reduction of organic dyes,which may have potential application in wastewater treatment.
文摘Oleate/PSt/TiO 2 nanosphere composites were prepared by seeding polymerization and characterized by TEM、FTIR、DSC and TGA. The antiwear ability of the oleate/PSt/TiO 2 nanospheres as additives in base oil was evaluated. The results indicate the oleate/PSt/TiO 2 nanosphere composites have good wear and extreme pressure resistance.
