Membranes prepared from graphene-based nanomaterials for water purification: a mini-review
Marliyana Aizudin, Nur Hashimah Alias, Yun Xin Angel Ng, Muhammad Haikal Mahmod Fadzuli, Seng Chuan Ang, Yi Xun Ng, Rafeeque Poolamuri Pottammel, Fu Yang, Edison Huixiang Ang
Abstract
Graphene-based nanomaterials (GBnMs) are currently regarded as a critical building block for the fabrication of membranes for water purification due to their advantageous properties such as easy surface modification of functional groups, adjustable interlayer pore channels for solvent transportation, robust mechanical properties, and superior photothermal capabilities. By combining graphene derivatives with other emerging materials, heteroatom doping and rational design of a three-dimensional network can enhance water transportation and evaporation rates through channels of GBnM laminates and such layered structures have been applied in various water purification technologies. Herein, this mini-review summarizes recent progress in the synthesis of GBnMs and their applications in water treatment technologies, specifically, nanofiltration (NF) and solar desalination (SD). Finally, personal perspectives on the challenges and future directions of this promising nanomaterial are also provided.