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Ceramic membranes characterised by corrosion resistance, high-temperature applicability, and reusability are especially suitable for wastewater treatment. In this research, Titania dioxide (TiO 2 ) was fabricated on surfaces of alumina (Al 2 O 3 ) membranes by hydrothermal reaction and factors that influenced their morphologies were investigated. SEM images showed needle-like TiO 2  crystals filling up the pores on the membrane surfaces. We investigated the photocatalytic activity and continuous separation performance of the TiO 2  coating alumina membranes using Congo red dye as a model organic pollutant. The results showed that the dye removal ratio remained at about 98% in a 120 h continuous filtration test. Furthermore, we proposed an easy and low-cost membrane regeneration method based on the photocatalytic degradation of TiO 2  crystals. The regenerated membrane still showed excellent continuous filtration ability, indicating the good potential application in the treatment of dye effluents.

Tio 2 coating on alumina membranes for continuous separation of dyes