Tio₂ coating on alumina membranes for continuous separation of dyes

Abstract

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.

Defect Engineering in GO Membranes – Tailoring Size and Oxidation Degree of Nanosheet for Enhanced Pore Channels

“…The significant use of dyes in the textile industry exacerbates water pollution due to their release in wastewater. [1,2] Given the escalating challenges of freshwater scarcity, further exacerbated by climate change, recovering dyes from wastewater emerges as a crucial step to combat pollution and reuse valuable dyes. [3] Unfortunately, the mainstream water treatment technologies currently available suffer from high costs and energy expenditure.…”