SiC–C Composite as a Highly Stable and Easily Regenerable Photothermal Material for Practical Water Evaporation

• DOI: 10.1021/acssuschemeng.7b04695
• Publication Date: 2018-05-26T02:10:31Z
• Authors: Le Shi; Yusuf Shi; Renyuan Li; Jian Chang; Noor Zaouri; Elaf Ahmed; Yong Jin; Chenlin Zhang; Sifei Zhuo; Peng Wang
• Keywords: 13. Climate action; 02 engineering and technology; 0210 nano-technology; 7. Clean energy; 6. Clean water

Solar-driven water distillation by photothermal materials is emerging as a promising way of renewable energy-driven clean water production. In designing photothermal materials, light absorption, photo-to-thermal conversion efficiency, and ability to localize thermal energy at the water–air interface are three important considerations. However, one additional consideration, regenerability, has so far slipped out of the photothermal material designs at status quo. This work reveals that there is a fouling layer formed during photothermal evaporation of real seawater (Red Sea water) and domestic wastewater, which once formed would be difficult to remove. Herein, we synthesize a SiC–C composite monolith as an effective photothermal material where carbon acts as photothermal component and SiC serves as a heat conductor and strong structural support. The high mechanical strength of the monolithic composite makes it able to withstand repeatedly high strength physical cleaning by brush scrubbing and sonication, a...