用于膜分离的MXenes:从制备策略到先进应用

Transition metal carbides/nitrides/carbonitrides,commonly referred to as MXenes,have gained widespread attention since their discovery in 2011 as a promising family of two-dimensional(2D)materials.Their impressive chemical,electrical,thermal,mechanical,and biological properties have fueled a surge in research focused on the synthesis and application of MXenes in various fields,including membranebased separation.By engineering the materials and membrane structures,MXene-based membranes have demonstrated remarkable separation performance and added functionalities,such as antifouling and photocatalytic properties.In this review,we aim to have a timely and critical review of research on their fabrication strategy and performance in advanced molecular separation and ion exchange,beginning with a brief introduction of the preparation and physicochemical properties of MXenes.Finally,outlooks and future works are outlined with the aims to provide valuable insights and guidance for advancing membranes'applications in different separation domains.

A critical review on thermodynamic mechanisms of membrane fouling in membrane-based water treatment process

Membrane technology is widely regarded as one of the most promising technologies for wastewater treatment and reclamation in the 21st century. However, membrane fouling significantly limits its applicability and productivity. In recent decades, research on the membrane fouling has been one of the hottest spots in the field of membrane technology. In particular, recent advances in thermodynamics have substantially widened people’s perspectives on the intrinsic mechanisms of membrane fouling. Formulation of fouling mitigation strategies and fabrication of anti-fouling membranes have both benefited substantially from those studies. In the present review, a summary of the recent results on the thermodynamic mechanisms associated with the critical adhesion and filtration processes during membrane fouling is provided. Firstly, the importance of thermodynamics in membrane fouling is comprehensively assessed. Secondly, the quantitative methods and general factors involved in thermodynamic fouling mechanisms are critically reviewed. Based on the aforementioned information, a brief discussion is presented on the potential applications of thermodynamic fouling mechanisms for membrane fouling control. Finally, prospects for further research on thermodynamic mechanisms underlying membrane fouling are presented. Overall, the present review offers comprehensive and in-depth information on the thermodynamic mechanisms associated with complex fouling behaviors, which will further facilitate research and development in membrane technology.