Progress in advanced carbon nanotubes composites for air purification

Haze represents a significant environmental concern, arising from particulate matter accumulated in smoke, dust, and steam, and gaseous pollutants such as sulfur dioxide and nitrogen oxides. These substances, once released into the atmosphere, lead to environmental pollution, disrupt transportation, and adversely affect human health. Numerous factors contribute to haze formation, including garbage incineration, traffic pollution, natural geographical conditions, and the level of forest coverage and fossil fuel combustion. Composite materials, which integrate two or more substances, are utilized and beneficial in effectively addressing pollution issues caused by a wide array of pollutants and the complex formation processes of phenomena such as haze. Carbon nanotubes have emerged as a promising material in the development of composite materials, largely due to their simple synthesis process. However, a comprehensive review detailing their role in haze removal and air purification is limited. Distinct from previous reviews on such composites, this review focuses on the functionalities of carbon nanotube composites in the absorption and transformation of haze-related air pollution. It describes and examines their efficacy in reducing bioaerosols associated with air pollutants, emissions of air pollutants, and their influence on plant evapotranspiration. The conclusion drawn is that the unique pore structure, toxicity, catalytic properties, and the counteractive effects of carbon nanotubes on soil pollutants underscore their critical role in addressing haze issues. This paper highlights the significant potential carbon nanotubes hold for future development in this area.

Graphical Abstract

This research explores the effectiveness of carbon nanotubes in mitigating emissions by adsorbing and reducing particulate matter and gases, and enhancing the accumulation of particulate matter on plant surfaces.