Purified multi-walled carbon nanotubes are widely used in various advanced applications due to their exceptional mechanical, electrical, and thermal properties. In electronics, they are utilized to enhance the conductivity and performance of nanocomposites, sensors, and transistors. Their high strength-to-weight ratio makes them ideal for reinforcing materials in aerospace and automotive industries, improving durability without adding significant weight. In energy storage, they are incorporated into batteries and supercapacitors to increase efficiency and charge-discharge cycles. Additionally, they play a crucial role in biomedical applications, such as drug delivery systems and tissue engineering scaffolds, due to their biocompatibility and ability to interact with biological molecules. Their use in environmental technologies, like water filtration and pollutant adsorption, further highlights their versatility in addressing modern challenges.