| The multifunctional hybrid nanomaterials with two or more components have already attracted extensive attention,which can be divided into inorganic hybrid nanomaterials,organic hybrid nanomaterials and inorganic-organic hybrid nanomaterials.The hybrid nanoparticles as one kind of the hybrid nanomaterials not only possess the functionality and charaters of the respective component,but also generate new property and potential development.In this work,the multifunctional Cu-ZnO、La1-xSrxMnO3@Au、La1-xSrxMnO3@ZnO、IrFe3O4 hybrid nanoparticles were synthesized by nanoemulsion method with the poly（ethylene glycol）-block-poly（propylene glycol）-block-poly（ethylene glycol）PEO-PPO-PEO as the surfactant.The multifunctional hybrid nanoparticles were characterized by（TEM）including（HRTEM）and（EDX）,（FTIR）,（XRD）,（UV-vis）,（PL）,（XPS）,（VSM）and（PPMS）.The photocatalytic behavior of the nanoparticles was evaluated using Sudan red（III）as a probe molecule.The subject of the research work is summarized as follows:1.Synthesis polymer-laced Cu-ZnO hybrid nanoparticles and photocatalytic degradation of Sudan red（III）Polymer-laced Cu-ZnO hybrid nanoparticles were synthesized by nanoemulsion method.The morphological and structural analyses show the nanoparticles are almost spherical,narrow size distribution and high crystallinity.The X-ray photoelectron spectroscopy（XPS）reveals Cu1+and Cu2+in ZnO.The ultraviolet-visible light absorbance spectrometry（UV-vis）and photoluminescence spectrophotometry（PL）demonstrate excellent absorption and emission properties of Cu-ZnO hybrid nanoparticles both in organic and aqueous solvent.Photodegradation of Sudan red（III）confirms that Cu-ZnO hybrid nanoparticles possess enhanced photocatalytic activity under UV irradiation and sunlight.Moreover,the Cu-ZnO nanoparticles were found to have the photocatalytic efficiency unaltered after 3cycles of use as tested.The Cu-ZnO hybrid nanoparticles are promising for potential applications in photocatalysis.2.Synthesis and properties of bi-phase dispersible La1-xSrxMnO3@Au hybrid nanoparticlesMultifunctional La1-xSrxMnO3@Au core-shell nanoparticles were synthesized by nanoemulsion method.The structural and morphological analyses show high crystallinity,core-shell structure,almost spherical with narrow particle size distribution of La1-xSrx MnO3@Au nanoparticles.The XPS analysis confirms that the nanoparticles are mostly composed of five elements,La,Sr,Mn,O,and Au.The fourier transform infrared spectroscopy（FTIR）study proves the PEO-PPO-PEO molecules on the La1-xSrx MnO3@Au nanoparticle surface,which enables an easy transfer of the nanoparticles between non-polar and polar solvents.The UV-vis analysis shows that the nanoparticles exhibit a surface plasmon resonance（SPR）absorption band around 561 nm from nanostructured Au.Vibrating sample magnetometry（VSM）and physical property measurement system（PPMS）demonstrate the nanoparticles with a superparamagnetic behavior at room temperature and tight Curie transition temperature.The magnetic properties were also demonstrated by the dispersion-collection process of the nanoparticles in water and hexane solvents.The MTT results reveal that the La1-xSrxMnO3@Au core-shell nanoparticles are more bio-friendly observed relative to the La1-xSrx MnO3 nanoparticles.Such nanoparticles are promising for optical,magnetic and biomedical application.3.Synthesis and characterization of La1-xSrxMnO3@ZnO core-shell nanoparticlesMultifunctional core-shell La1-xSrxMnO3@ZnO nanoparticles were synthesized via a modified nanoemulsion method with PEO-PPO-PEO as the surfactant.The FTIR study confirms the PEO-PPO-PEO molecules on the surface of the resulting nanoparticles.The TEM and XRD show the nanoparticles are narrow size distribution,almost spherical,core-shell structure and high crystallinity.The XPS analysis shows that the nanoparticles are mostly composed of La,Sr,Mn,O,and Zn.The VSM and PPMS measurements manifest the nanoparticles with a superparamagnetic behavior at room temperature and a sharp,tight Curie transition temperature.The UV-vis,PL and dispersion-collection process in water and hexane solvents show the nanoparticles have well absorption,emission and magnetic properties.The magnetic-optical La1-x-x Srx MnO3@ZnO nanoparticles are promising for potential applications in terms of sensor,magnetic hyperthermia,and drug delivery.4.Synthesis of IrFe3O4 hybrid nanoparticlesPolymer-capped IrFe3O4 nanoparticles were synthesized via nanoemulsion process.The morphology and structure of the ensuing nanoparticles were analyzed by transmission electron microscopy and X-ray diffractometer,which show the nanoparticles having a narrow particle size distribution and high crystallinity.FTIR studies were performed to found the coverage of the polymer on the nanoparticle surface.Magnetic measurements performed by VSM evaluate the soft ferromagnetic properties of the nanoparticles.Such nanoparticles have potential application prospect in magnetic and biomedical field. |
