Abstract: Carbon nanotubes/graphene composite porous material (CNTs/RGA) was prepared by two-step hydrothermal reduction combined with ice template method. Graphite oxide (GO) was used as the skeleton, carbon nanotubes (CNTs) were introduced to improve the mechanical properties and photothermal conversion properties. Polyvinylpyrrolidone (PVP) was used as the crosslinking agent. The microstructure and chemical properties of CNTs/RGA were analyzed using SEM, FTIR, XPS and water contact angle measurement, and oil adsorption tests were conducted on CNTs/RGA. The results show that:CNTs/RGA has rich and orderly pore structure and high photothermal conversion efficiency. The adsorption capacity of light oil is 81.61—105.93 g·g-1. In the full solar spectrum range, the average light absorbance of CNTs/RGA was 76.74%. Under one sun illumination, the upper surface temperature of CNTs/RGA could be rapidly heated to 104 ℃ within 60 s, significantly reducing the viscosity of heavy oil. The adsorption capacity of CNTs/RGA on heavy oil was enhanced, reaching 107.71 g·g-1 within 30 min. CNTs/RGA had good mechanical properties and maintained a good appearance after 200 compression recoveries under 70% strain conditions. After 10 times of adsorption-desorption, only 15% of the adsorption capacity was lost, indicating that CNTs/RGA has good reusability and shows broad application prospects in the field of offshore oil spill treatment.
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2025, Vol. 39 
