ABSTRACT

Two-dimensional MXenes with their attractive applicability and unique properties such as eco-friendly features, large surface area, remarkable chemical stability, high thermal/electrical conductivity, exclusive sorption-reduction capacity, and hydrophilicity can be employed as promising candidates for water treatment; they can be mostly deployed for the elimination of various hazardous pollutants with high sorption selectivity, efficient reduction capability, and suitable degradation potentials. However, several important physicochemical parameters (e.g., pH, temperature, and water quality) can influence the adsorption performance of MXenes. Additionally some important challenging issues regarding the toxicity, degradability, storage, and large scale/commercial production of MXenes are still need to be evaluated. The aggregation of MXenes is also a critical challenge, which can reduce the adsorption activity and surface area of these materials; the surface chemistry of MXenes and related mechanisms of contaminants removal by these materials should be analytically and systematically evaluated. Importantly, the environmental risks of MXene-based structures should also be broadly analyzed. This review delineates the pros and cons and critical issues pertaining to the deployment of MXenes endowed with their superior surface area, high selectivity/sensitivity, recyclability, and attractive mechanical properties for removing hazardous pollutants (e.g., antibiotics, dyes, pesticides, heavy metals, pharmaceutical compounds, and radionuclides) from water and wastewater.

摘要

二维MXenes具有吸引人的适用性和独特的特性，如环保特性、大表面积、显着的化学稳定性、高导热/导电性、独特的吸附还原能力和亲水性，可作为水处理的有希望的候选者；它们主要用于消除各种具有高吸附选择性、高效还原能力和合适降解潜力的有害污染物。然而，几个重要的理化参数（例如.、pH、温度和水质）会影响 MXenes 的吸附性能。此外，关于 MXenes 的毒性、降解性、储存和大规模/商业生产的一些重要的具有挑战性的问题仍然需要评估。MXenes 的聚集也是一个关键挑战，它会降低这些材料的吸附活性和表面积；MXenes 的表面化学和这些材料去除污染物的相关机制应进行分析和系统评估。重要的是，还应广泛分析基于 MXene 的结构的环境风险。这篇综述描述了与 MXenes 部署相关的利弊和关键问题，这些 MXenes 具有优越的表面积、高选择性/灵敏度、可回收性、例如，来自水和废水的抗生素、染料、杀虫剂、重金属、药物化合物和放射性核素）。