N-doped MWCNTs are widely utilized in energy storage devices, particularly in supercapacitors and lithium-ion batteries, due to their enhanced electrical conductivity, high surface area, and improved charge storage capacity. Their unique structure and nitrogen doping make them effective catalysts in fuel cells, facilitating oxygen reduction reactions with higher efficiency.

In the field of electronics, they are employed in the development of advanced sensors and field emission devices, offering superior sensitivity and performance for detecting gases or chemicals.

Additionally, N-doped MWCNTs are used in environmental applications, such as water and air purification, as well as gas adsorption, where their modified surface properties enable efficient removal of pollutants, contaminants, toxins, and heavy metals.

Their mechanical strength and lightweight nature also make them suitable for reinforcing composite materials in aerospace and automotive industries.

Furthermore, in biomedical applications, N-doped MWCNTs show promise in drug delivery systems and disease diagnostics due to their biocompatibility and ability to be tailored for specific responses.