Preparation and organic solvent adsorption of PTFE fabric reinforced GO/SiO₂aerogel

The adsorption capacity of SiO2 aerogel has been greatly improved with the cross-linking of graphene and composition of PTFE fabric via sol-gel method and CO2 supercritical drying technique. The effects of MTMS/GO molar ratios are investigated, it can be found that the GO/SiO2 aerogel has a large specific surface area of 551 m2/g and high pore volume of 2.2 cm3/g. Meanwhile, as an excellent adsorbent, hydrophobicity is prerequisite; the contact angle of PTFE fabric reinforced GO/SiO2 aerogel is up to 152.8°. In terms of adsorption capacity, the result shows that it can reach the value of 10.87 g/g for NMP and 9.24 g/g for cyclohexane. Furthermore, it can still retain the initial adsorption of 78.3% to 85.9% after several cycles. It is noted that the first-order kinetic model is used to prove the adsorption validity, which achieves a fitting degree over 99%.