Department of Chemistry, Sri Venkateswara College, University of Delhi, Delhi, 110021, India.
Department of Chemistry, Sri Venkateswara College, University of Delhi, Delhi, 110021, India.
Chemosphere. 2022 Jul;299:134468. doi: 10.1016/j.chemosphere.2022.134468. Epub 2022 Mar 29.
With the world developing exponentially every day, the collateral damage to air is incessant. There are many methods to purify the air but using carbon nanotubes (CNTs) as adsorbents remains one of the most efficient and reliable methods, due to their high maximum adsorption capacity which renders them extremely useful for removing pollutants from the air. The different types of CNTs, their synthesis, functionalization, purification, functioning, and advantages over conventional filters are deliberated along with diverse types of CNTs like single-walled (SWCNTs), multiwalled (MWCNTs), and others, which can be functionalized and deployed for the removal of harmful gases like oxides of nitrogen and sulphur, and ozone, and volatile organic compounds (VOCs), among others. A comprehensive description of CNTs is provided in this overview with illustrative examples from the past five years. The fabrication methods and target gases of many CNTs-based gas sensors are highlighted, in addition to the comparison of their properties, mainly sensitivity. The effect of functionalization on sensors has been discussed in detail for various composites targeting specific gases, including the future outlook of functionalized CNTs in assorted practical applications.
随着世界每天呈指数级发展，对空气造成的附带损害也在持续不断。有许多净化空气的方法，但由于碳纳米管 (CNT) 具有最高吸附容量，因此将其用作吸附剂仍然是最有效和可靠的方法之一，这使得它们非常适合从空气中去除污染物。本文详细讨论了不同类型的 CNT（如单壁 CNT (SWCNT)、多壁 CNT (MWCNT) 等），包括它们的合成、功能化、净化、作用以及相对于传统过滤器的优势，这些 CNT 可以进行功能化并用于去除有害气体，如氮氧化物和硫氧化物、臭氧和挥发性有机化合物 (VOC) 等。本文综述了 CNT 的特性，提供了 CNT 的综合描述，并附有过去五年的实例。本文还重点介绍了基于 CNT 的许多气体传感器的制造方法和目标气体，以及对它们的特性（主要是灵敏度）进行了比较。本文还详细讨论了功能化对各种针对特定气体的复合材料传感器的影响，包括功能化 CNT 在各种实际应用中的未来前景。
