Polydimethylsiloxane composites integrated with black TiO<sub>2</sub> for effective solar-powered water evaporation and thermoelectric power production.
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초록
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Solar-assisted interfacial water evaporation via strategic solar-thermal energy conversion has garnered interest due to its enhanced efficiency in water purification and energy generation. However, improving thermal management remains complex. We developed black titanium dioxide and polydimethylsiloxane (B-TiO2/PDMS) composites to harness a broad solar spectrum for improved energy production and water purification. The B-TiO2/PDMS sponge exhibited excellent optical-to-thermal conversion, maintaining a temperature of 66 °C compared to 41.6 °C for PDMS under 1 sun intensity for 10 minutes. This system achieved an evaporation rate of 1.39 kg m−2h−1 and a photothermal conversion efficiency of 70.8% under 1 sun. Integrating a thermoelectric (TE) module during solar evaporation yielded 30 mV under 1 sun. The B-TiO2/PDMS sponge exhibited excellent resilience and adaptability, effectively managing thermal and dual solar-powered water and energy production.