It depends on what properties the nanoparticles are used to improve
Desalination of water using renewable energy is an advanced and cost-effective method. Energy storage in the form of latent heat plays a key role in these systems and phase change materials help a lot in this regard. The attached paper deals with the recycling of drinking water using nanomaterials in phase change materials from a tubular solar still. The use of graphene oxide nanoparticles significantly improved the properties of the phase change material and subsequently improved the thermal performance of the TSS.
Article Experimental study on tubular solar still using Graphene Oxi...