Abstract
A TiO 2 membrane supported on a planar porous Ti–Al alloy was prepared by combination of electrophoretic deposition and dip-coating. In the electrophoretic deposition process, the membrane thickness increased linearly with the square root of the deposition time, while increased with decrease of the suspension viscosity. The perfect TiO 2/Ti–Al composite membrane was obtained by further dip-coating modification. SEM images showed that the surface of the membrane was defect-free. XRD result indicated that rutile TiO 2 still remained in the membrane bulk as the main phase, while a new phase titanium oxides with the form of Ti x O y , where y is less than 2 x, was also observed. The supported TiO 2/Ti–Al composite membrane had an average pore size of 0.28 μm, a thickness of 40 μm or so and a pure water flux of 3037 L m −2 h −1 bar −1.
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