| 【文章摘要】 Hybrid membranes combining graphene oxide (GO) and silicon dioxide (SiO_2) were successfully developed for pervaporation desalination using porous zircon tube substrates. These GO/SiO_2 membranes were carefully designed by adjusting the amount of GO and the pH levels during the dip-coating process on the zircon tube surface. The study aimed to investigate how varying amounts of GO and pH levels affect the membranes' properties and desalination performance. The results indicate that raising the pH level decreases the membranes' hydrophilicity and enhances their stability. Conversely, increasing the amount of GO increases the membranes' hydrophilicity and reduces their pore size. Higher pH levels and GO amounts resulted in better salt rejection but lower water fux. Among the tested membranes, GS-6 (0.3 % GO/SiO_2, pH 6) achieved the highest salt rejection rate of 99.96 % at 30 ℃ with a 1 % NaCl feed concentration. In contrast, GS-1 (0.1 % GO/SiO_2, pH 4) showed the highest water flux of 8.54 kg m~(-2) h 1 at 60 ℃ with the same feed concentration. Increasing the temperature led to decreased salt rejection but increased water fux. Additionally, higher feed concentrations lowered both salt rejection and water fux. |