Department of Physics, Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603 110, India.
Department of Physics, Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603 110, India.
Environ Res. 2023 Sep 15;233:116459. doi: 10.1016/j.envres.2023.116459. Epub 2023 Jun 24.
The recent expeditious industrialization and urbanization showcase the increasing need for renewable and non-renewable energy and the severe environmental crisis. In this regard, numerous 2-dimensional (2D) nanomaterials have been developed as a facile approach to meet the futuristic energy essentials and to resolve the crisis. In contrast, the newly explored 2D MXenes (transition metal carbide/nitrides/carbonitride) have been employed as an intriguing material for various environmental applications. This development is accredited to their unique properties, which include a vast surface area, strong electrical conductivity, fascinating photophysical properties, high mechanical properties, stability in an aqueous medium, high hydrophilicity, biocompatibility, ease of functionalization, and excellent thermal properties. MXenes act as a potential candidate in water desalination, energy storage devices such as electrodes of Li-ion batteries and pseudo capacitors, hydrogen production, sensors, and wastewater treatment. This review article deliberates the synthesis of MXene and nanocomposites of MXene and their photo-catalytic actions against various toxic pollutants such as organic dyes and heavy metals in wastewater. This review also precises the various preparation methods of MXene-based photocatalyst and the enhanced photocatalytic activity of MXene and MXene-based nanocomposites in wastewater treatment. Also, it details the attempts made to improve the photocatalytic activity of MXene-based nanocomposites in terms of their structural compositions. In addition, the merits and demerits of the MXene-based photocatalysts are deliberated, which may pave the way for future research in this arena.
最近快速的工业化和城市化展示了对可再生和不可再生能源的日益增长的需求，以及严重的环境危机。在这方面，已经开发出了许多二维（2D）纳米材料，作为一种简便的方法来满足未来的能源需求并解决危机。相比之下，新探索的二维 MXenes（过渡金属碳化物/氮化物/碳氮化物）已被用作各种环境应用的有趣材料。这一发展归因于它们独特的性质，包括巨大的表面积、强导电性、迷人的光物理性质、高机械性能、在水介质中的稳定性、高亲水性、生物相容性、易于功能化和优异的热性能。MXenes 作为水淡化、锂离子电池和赝电容器电极等储能设备、制氢、传感器和废水处理的潜在候选材料。本文综述了 MXene 的合成及其与 MXene 的纳米复合材料的光催化作用，以及在废水处理中对各种有毒污染物（如有机染料和重金属）的光催化作用。本文还详细介绍了基于 MXene 的光催化剂的各种制备方法，以及 MXene 和基于 MXene 的纳米复合材料在废水处理中的增强光催化活性。此外，还详细说明了在结构组成方面提高基于 MXene 的纳米复合材料光催化活性的尝试。此外，还讨论了基于 MXene 的光催化剂的优缺点，这可能为该领域的未来研究铺平道路。
