Although desalination methods have been extensively used, many of them need substantial installations and access to sophisticated infrastructure to generate fresh water. The solar still uses 0.2% reduced graphene/cerium oxide nanoparticles as a hybrid nanoparticle material and it uses coated absorber solar still. The hybrid nanomaterial is embedded in commercial black paint of absorber plate and walls of solar still. Exergy annihilations in different parts of the sun-powered stills have been determined and examined. Dissipation is quicker and the exergy of evaporation is higher at improved sunlight-based stills than that of black paint coating still. Moreover, the exergy and energy efficiencies of the improved stills are upgraded contrasted and with the black paint coating still. A short conversation concerning the impact of various boundaries on sunlight-based stills effectiveness is likewise introduced. The daytime energy productivity of reduced graphene and cerium oxide/water blends is 43.26%, yet the old style is just 30.17%. The hourly exergy efficiency increases up to 0.47% by using nanoparticle coating. It has been discovered that salty water temperature and heat transfer rate are both increased by adding graphene/cerium oxide nanoparticles to black paint. The proposed system's solar still productivity is higher than that of black paint coating on the absorber plate of the solar still.
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