Role of 2D layered double hydroxide based heterostructures in preparation polymeric photocatalytic membrane for wastewater treatment

Abstract

The limitations of membrane filtration processes in water and wastewater treatment have led to the development of photocatalytic membranes. These membranes are produced by integrating photocatalytic and membrane filtration technologies. Developing photocatalytic membranes with anti-fouling and self-cleaning capabilities is essential for these applications. Utilizing photocatalysts with high photocatalytic activity and excellent hydrophilic properties is advantageous. Among various semiconductor photocatalytic materials, layered double hydroxides (LDHs) stand out due to their hydrophilicity, large surface area, adjustable interlayer spacing, and robust photocatalytic performance. However, limitations such as electron-hole recombination and low visible light absorption reduce the photocatalytic activity of LDHs. A common method to enhance the photocatalytic properties of LDHs is by forming heterostructures with other semiconductor materials. LDH-based heterostructures with improved photocatalytic properties are promising for enhancing photocatalytic membrane performance. This review comprehensively examines recent advancements in photocatalytic membranes modified with LDH-based heterostructures for water and wastewater treatment, offering a clear perspective for researchers in the field.