Abstract—A membrane with selective wettability and excellent thermal and chemical stability is required for effective oil-water separation. In this work, a novel TiO 2 nanosheet-anchored carbonnanofibers fabricated by using solvothermal method is presented. The hierarchical TiO2 micro/nanostructure that grows on the surface of carbon nanofibers renders the membrane superhydrophilic and underwater superoleophobic. Coupled with the cha racteristic of high porosity and micron-scale pore size, the membrane is capable of separating oil from water by gravity. Thermal analysis show thatthe oil-water separation efficiency is greater than 99%. Furthermore, the membrane has an oil breakthrough pressure up to 3.63m which is the highest breakthrough pressure ever reported. Stability test indicates that the membrane is stable in ultrasonic, thermal and extreme pH conditions. Without compromising the separation efficiency, a permeate flux of 400-700L/m2-hr can be achieved.
Index Terms—Carbonnanofiber, electrospinning, oil-water separation, titanium dioxide.
Ming Hang Tai, Peng Gao, Benny Yong Liang Tan, and Darren D. Sun are with the Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (e-mail: mhtai1@ e.ntu.edu.sg).
James O. Leckie is with the Stanford University, 450 Serra Mall, Stanford, CA 94305, United States (e-mail: email@example.com).
Cite:Ming Hang Tai, Peng Gao, Benny Yong Liang Tan, Darren D. Sun, and James O. Leckie, "A Hierarchically-Nano Structured TiO2-Carbon Nanofibrous Membrane for Concurrent Gravity-Driven Oil-Water Separation," International Journal of Environmental Science and Development vol. 6, no. 8, pp. 590-595, 2015.