Fabrication of Supported Mesoporous TiO2 Membranes: Matching the Assembled and Interparticle Pores for an Improved Ultrafiltration Performance

摘要: We report the fabrication and ultrafiltration performances of an asymmetric composite membrane with a mesoporous TiO2 skin layer coated on macroporous alumina support. Mesoporous was first prepared deposited substrate through sol−gel process where ethylene oxide propylene triblock polymer (PEO−PPO−PEO, P123) used to modify properties sols also introduce assembled pores in layer. The obtained characterized by means scanning electron microscopy, transmission X-ray diffraction, nitrogen adsorption. found that there were two types wormlike mesopores present membrane: interparticle pores. By carefully controlling sol properties, we made match each other, which size is close or smaller than This pore-size matching ensures narrow distribution and, consequently...