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

Le Shi, Yusuf Shi, Renyuan Li, Jian Chang, Noor Zaouri, Elaf Ahmed, Yong Jin, Chenlin Zhang, Sifei Zhuo, Peng Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)

Abstract

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, and the anti-carbon-loss mechanism generates zero carbon loss during the physical cleaning. In the case of the domestic wastewater evaporation, the bio- and organic foulants on the SiC-C composite monolith can be totally removed by annealing at 1000 °C in N2 atmosphere. We believe that the SiC-C composite monoliths are promising photothermal materials in practical solar-driven water evaporation applications thanks to their highly stable and easily regenerable properties; therefore, more research efforts are warranted to further improve their performances.

Original languageEnglish
Pages (from-to)8192-8200
Number of pages9
JournalACS Sustainable Chemistry and Engineering
Volume6
Issue number7
DOIs
Publication statusPublished - 2 Jul 2018
Externally publishedYes

Keywords

  • Foulant cleaning
  • High mechanical strength
  • Photothermal material
  • SiC-C monolith
  • Solar-driven water evaporation
  • Thermal stability

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

Cite this