Three-dimensional flower-like nanomaterials have wide application due to the large specific surface area.In this letter,the morphology of octadecylamine（ODA） from several common solvents is studied and it is found t...Three-dimensional flower-like nanomaterials have wide application due to the large specific surface area.In this letter,the morphology of octadecylamine（ODA） from several common solvents is studied and it is found that from the chloroform and acetone solution,ODA assembles into petal-like structure,which further forms the spherical or flower-like architecture.Furthermore,the composite materials incorporated reduced graphene oxide（rGO） and ODA could well keep the flower-shaped structure of ODA.XRD results show that the introduction of graphene has little influence on the structure of ODA and contact angle test indicates good hydrophobic performance of the rGO/ODA material.展开更多
The layer-by-layer assembly of polyethyleneimine and carbon nanotubes is carried out through the electrostatic interactions on colloidal polystyrene templates. The successful spherical growth of polyethyleneimine/carb...The layer-by-layer assembly of polyethyleneimine and carbon nanotubes is carried out through the electrostatic interactions on colloidal polystyrene templates. The successful spherical growth of polyethyleneimine/carbon nanotube multilayers could be investigated by SEM. The subsequent in situ preparation and deposition of gold nanoparticles on the core–shell composites could yield novel microsphere complexes, which are characterized by SEM, TEM, EDX and XRD. The functional hierarchical microspheres with gold nanoparticles exhibit good catalytic activity in the reaction of reducing 4-nitrophenol to 4-aminophenol.展开更多
The layer-by-layer assembly of graphene oxide and diazoresin is carried out via the electrostatic and hydrogen bond interactions on planar substrates and colloidal templates.The successful planar and spherical growth ...The layer-by-layer assembly of graphene oxide and diazoresin is carried out via the electrostatic and hydrogen bond interactions on planar substrates and colloidal templates.The successful planar and spherical growth of multilayer could be investigated by UV-vis spectrophotometry and scanning electron microscopy,respectively.Subsequent UV irradiation or heating would convert the ionic bonds and hydrogen bonds to covalent bands,which significantly improves the stability of the multilayer composite against solvent etching.For the cross-linked core-shell composites,the template cores could be removed by dissolution and hollow microspheres are obtained.展开更多
基金supported by the Natural Science Foundation of China(Nos.21173266 and 21473250)the Fundamental Research Funds for the Central Universitiesthe Research Funds of Renmin University of China(No.11XNJ021)
文摘Three-dimensional flower-like nanomaterials have wide application due to the large specific surface area.In this letter,the morphology of octadecylamine（ODA） from several common solvents is studied and it is found that from the chloroform and acetone solution,ODA assembles into petal-like structure,which further forms the spherical or flower-like architecture.Furthermore,the composite materials incorporated reduced graphene oxide（rGO） and ODA could well keep the flower-shaped structure of ODA.XRD results show that the introduction of graphene has little influence on the structure of ODA and contact angle test indicates good hydrophobic performance of the rGO/ODA material.
基金supported by the National Natural Science Foundation of China (Nos. 21173266 and 21473250)the Fundamental Research Funds for the Central Universitiesthe Research Funds of Renmin University of China (Nos. 11XNJ021 and 15XNLQ04)
文摘The layer-by-layer assembly of polyethyleneimine and carbon nanotubes is carried out through the electrostatic interactions on colloidal polystyrene templates. The successful spherical growth of polyethyleneimine/carbon nanotube multilayers could be investigated by SEM. The subsequent in situ preparation and deposition of gold nanoparticles on the core–shell composites could yield novel microsphere complexes, which are characterized by SEM, TEM, EDX and XRD. The functional hierarchical microspheres with gold nanoparticles exhibit good catalytic activity in the reaction of reducing 4-nitrophenol to 4-aminophenol.
基金supported by the Natural Science Foundation of China(Nos.21173266 and 21473250)the Fundamental Research Funds for the Central Universitiesthe Research Funds of Renmin University of China(No.11XNJ021)
文摘The layer-by-layer assembly of graphene oxide and diazoresin is carried out via the electrostatic and hydrogen bond interactions on planar substrates and colloidal templates.The successful planar and spherical growth of multilayer could be investigated by UV-vis spectrophotometry and scanning electron microscopy,respectively.Subsequent UV irradiation or heating would convert the ionic bonds and hydrogen bonds to covalent bands,which significantly improves the stability of the multilayer composite against solvent etching.For the cross-linked core-shell composites,the template cores could be removed by dissolution and hollow microspheres are obtained.
