Short carboxyl purified multi-walled carbon nanotubes are widely used in various advanced applications due to their unique properties. They are commonly employed in the development of high-performance composites, where they enhance mechanical strength, electrical conductivity, and thermal stability. These nanotubes are also utilized in energy storage devices, such as supercapacitors and lithium-ion batteries, to improve charge storage capacity and efficiency. In the field of electronics, they serve as conductive fillers in flexible and transparent conductive films. Additionally, their functionalized surfaces make them suitable for biomedical applications, including drug delivery systems and biosensors, where they facilitate targeted delivery and sensitive detection. Their use in environmental applications, such as water purification and pollutant adsorption, is also notable due to their high surface area and reactivity.