钛中空纤维膜改性及应用研究

Modifi cation and Application of Titanium Metal Hollow Fiber Membrane

采用相转化法制备高致密的钛中空纤维膜后,使用电化学阳极沉积法在其表面负载二氧化钛TiO_(2)纳米结构进行改性,并以罗丹明B(RhB)为模拟有机废水评价其催化降解性能。结果表明,以钛粉(Ti)、N-甲基吡咯烷酮(NMP)、钯(Pd)、聚砜(PS)为铸膜液原料,且NMP:PS=6:1,烧结温度为1000℃制得的高致密钛中空纤维膜,将其浸泡于TiCl_(3)溶液中,在恒电流10mA/cm^(2)、沉积时间10min条件下,可在钛中空纤维膜载体表面负载平整光滑的线状纳米TiO_(2)。与纯钛板和纯钛中空纤维膜相比,负载纳米TiO_(2)的钛中空纤维膜,对浓度为8mg/L的RhB溶液的电化学降解速率最快,其降解效率在40min内可达95%。

Titanium hollow fiber membranes with low energy consumption,high mechanical strength and permeability were prepared by phase inversion method for the first time.TiO_(2)nanostructures were loaded on the surface of the membranes by electrochemical anodic deposition.Rhodamine B(RhB)was used as a model organic wastewater to evaluate the catalytic degradation performance.The results showed that a high-density titanium hollow fiber membrane was prepared using titanium powder(Ti),N-methylpyrrolidone(NMP),palladium(Pd),and polysulfone(PS)as the raw materials for the casting solution,with NMP:PS=6:1 and sintering temperature of 1000℃.Soaking it in a TiCl_(3) solution,under constant current of 10mA/cm^(2)and deposition time of 10 minutes,a smooth linear nano TiO_(2)can be loaded on the surface of the titanium hollow fiber membrane carrier.Compared with pure titanium plate and pure titanium hollow fiber membrane,the electrochemical degradation rate of titanium hollow fiber membrane loaded with nano-TiO_(2)was the fastest to the 8 mg/L RhB solution,and the degradation efficiency was 95%within 40 minutes.