Synthesis and Performance Study of Modified Fullerene Composite by Photo-Isomerization Molecule
Fullerenes are zero-dimensional carbon nanomaterials with cage-like spatial structure and excellent physicochemical properties,especially the extraordinary physical and chemical properties(such as superconductivity,photocatalysis)exhibited by C60 fullerenes.Fullerene-based composites have been widely used in energy,electronics,medicine,solar energy and other fields.However,the special molecular structure of C60 makes its solubility and processing property poor,thus limiting its practical application.Therefore,to achieve efficient surface modification and functionalization is the focus of research on C60-based nanocomposites.However,due to the limited solubility and processing properties of fullerenes,the traditional preparation methods of fullerene-based composites require organic solvents and the yield is not high.Therefore,a simple aqueous synthesis strategy is proposed.The photoisomerized fullerene composite(AZOC-FC60)was successfully synthesized by surface hydroxylation and free radical addition reaction of fullerene.At the same time,the structure and photoisomerism of the composites were characterized by FT-IR,XPS and UV-vis spectroscopy.The results show that the functional density of AZOC molecule in AZOC-FC60 is about 1:41,which is equivalent to one AZOC molecule grafted on every 41 C atoms,showing a high functional density.the structure of AZOC-FC60 composite is similar to that of FC60,but its surface is uneven caused by the grafting of AZOC on the surface of FC60;the photoresponse and structural stability of AZOC-FC60 composite are improved by 4 orders of magnitude through enhanced intermolecular interaction.The aqueous synthesis process of AZOC-FC60 composite is simple,which greatly expands the application potential of the composites in the fields of photothermal storage/photocatalysis.
fullereneC60surface modificationsurface functionalizationaqueous synthesisphotoresponsestructural stabilityhalf-life period
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