Figure 6 | Scientific Reports

Figure 6

From: Preparation of efficient photothermal materials from waste coffee grounds for solar evaporation and water purification

Figure 6The alternative text for this image may have been generated using AI.

Change in mass of the (a) pure water and (b) 3.5 wt %NaClover time in a dark field and under 1 sun irradiation. (c) Solar thermal efficiencies (blue, right-hand side axis) and corresponding evaporation rates under 1 sun irradiation (red, left-hand side axis) with the HCCG. (d) Evaporation rates of pure water with and without HCCG under different illumination intensities.

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