Diagram showing a solar water heating system using nanoparticles. (b) Application of condensed light from a solar simulator to water with dispersed TiN nanoparticles. Note that rising water vapor can be seen even before the water temperature increases. Credit: Copyright NIMS
A research team in Japan discovered through numerical calculations that nanoparticles of transition metal nitrides and carbides absorb sunlight very efficiently, and confirmed experimentally that nitride nanoparticles, when dispersed in water, quickly raise water temperature. These nanoparticles may be applied for heating and distillation of water through efficient sunlight use.
The examples of sunlight use are power generation using solar cells and water heating through photothermal conversion, a process in which abso...
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