Hollow carbon spheres are widely used in energy storage applications, particularly in batteries and supercapacitors. Their unique structure provides a high surface area and excellent conductivity, making them ideal for enhancing the performance of electrodes. They are also employed in hydrogen storage due to their ability to adsorb and release hydrogen efficiently. In the field of catalysis, these spheres serve as supports for metal nanoparticles, improving reaction rates and selectivity. Additionally, their lightweight and porous nature make them suitable for use in environmental applications, such as water purification and air filtration, where they effectively adsorb pollutants and contaminants. Their versatility extends to drug delivery systems and medical imaging, where they can encapsulate and release therapeutic agents in a controlled manner or serve as contrast agents due to their small size and modifiable surface.