The necessity for expensive energy storage in the basin area required by solar distillation methods to boost output supports the value of natural green dyes as a desirable technique. The current research was done to see if adding different amounts of matte black paint (BP) and activated carbon nanoparticles (ACNPs) to the sidewalls of a double-sloped U-shaped stepped basin solar still (DUSS) may boost output. It was created using Mangifera indica and Celostia argentea ACNP, and samples of carbon powder with doped ZnO nanoparticles were used for testing. The newly proposed design may increase the DUSS's water temperature, increase output to 14.92 l/m2 per day, and achieve an usual daily efficiency of 38.73%.