Hydroxy multi-walled carbon nanotubes are widely used in the field of materials science for reinforcing composites, enhancing their mechanical strength, and improving electrical conductivity. They are incorporated into polymers, metals, and ceramics to create lightweight yet durable materials for aerospace, automotive, and construction industries.

In electronics, these nanotubes are utilized in the development of conductive films, sensors, and energy storage devices like supercapacitors and batteries due to their high surface area and efficient charge transfer properties.

In biomedical applications, they serve as drug delivery carriers, leveraging their functionalized surface to target specific cells or tissues. They are also explored in tissue engineering scaffolds to promote cell growth and regeneration.

Additionally, their adsorption capabilities make them effective in environmental applications, such as water purification and pollutant removal, by capturing heavy metals and organic contaminants.