Graphitized carboxyl multiwalled carbon nanotubes are widely used in the field of advanced materials due to their unique properties. They are often incorporated into polymer composites to enhance mechanical strength, electrical conductivity, and thermal stability. These nanotubes are particularly valuable in the development of high-performance materials for aerospace, automotive, and electronics industries, where lightweight yet durable components are essential. In energy storage, they serve as conductive additives in electrodes for lithium-ion batteries and supercapacitors, improving charge transfer and overall efficiency. Their high surface area and functionalized carboxyl groups make them suitable for use in sensors, where they can detect gases, biomolecules, or other analytes with high sensitivity. Additionally, these nanotubes are utilized in water purification systems as adsorbents for heavy metals and organic pollutants, leveraging their large surface area and chemical reactivity. In biomedical applications, they are explored for drug delivery systems, tissue engineering, and biosensors due to their biocompatibility and ability to be functionalized with various biomolecules. Overall, their versatility and enhanced properties make them a critical component in cutting-edge technologies across multiple industries.