原位修飾法合成鉻苯二甲酸MIL-101於陶瓷中空纖維之製備及其於奈米過濾之應用

Abstract

High performance metal-organic framework (MOF) nanocomposite membranes with simple and rapid synthesis process were highly deserved in this century. Beside that, MOF nanoparticles compatibility and membrane thickness as the key of MOF membrane preparation are still being investigated until now. Herein, we report a first-time continuous film-like chromium benzenedicarboxylate framework MIL-101(Cr) on ceramic hollow fiber membrane via in situ growth hydrothermal method. The MOF membranes were prepared along with the MOF nanoparticles in one synthesis step. MIL-101(Cr) has a large surface area, pore size between 1,2-1,6 nm, and good hydrophilicity which can increase the flux enhancement and suitable for organic dye removing application. Dead-end nanofiltration using several type of dyes were carried out to verify the membrane quality. As a result, the nearly zero thickness of MIL-101(Cr) layer on the membrane surface allowed the outstanding water permeation value (41.4 and 46.6 L.m-2hr-1bar-1 for Brilliant Blue and Rose Bengal) which is the best result reported to date. Furthermore, well-intergrown and defect-free of MIL-101(Cr) layer on the membrane performed 100% rejection of Brilliant Blue and Acid Fuchsin from water. This energy-efficient and cost-effective strategy will be useful for the fabrication of MOF membranes for wastewater treatment nanofiltration application.