Preparation of carbon nanotube-graphene composite aerogel and evaluation of photothermal assisted oil absorption performance
Graphene oxide(GO)and carboxylated multi-walled carbon nanotubes(MWCNTs/COOH)were used as raw materials for the preparation of Pickering emulsion,which was used as a soft template for the synthesis of carbon nanotubes/graphene composite aerogel(CNTs/STRGA)with"droplet-like"pore structure and large pore volume.The photothermal conversion performance of the materials was improved by introducing MWCNTs/COOH.By adjusting the mass ratio between GO and MWCNTs/COOH,oil/water ratio and hydrothermal reduction time,a series of CNTs/STRGAs with different properties were obtained.The prepared materials were characterized using scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS),Raman spectrometer and Fourier transform infrared spectrometer(FTIR)to analyze their internal structure and chemical properties.A UV visible near-infrared spectrophotometer and a microcomputer controlled electronic universal testing machine were used to evaluate the light absorbance and mechanical properties of materials.The results showed that MWCNTs/COOH could significantly improve the light absorbance(95.2％)and photo-thermal conversion performance of the material,and the surface of the material could be heated to 130℃ under 1 sun illumination.The photothermal oil adsorption rate of the material was significantly enhanced,6.88g/(g·min),and its adsorption capacity reached 130.66g/g.
万方数据
维普
