Seawater desalination derived entirely from ocean biomass

Xiaojie Liu, Yanpei Tian, Yanzi Wu, Andrew Caratenuto, Fangqi Chen, Shuang Cui, Joseph A. DeGiorgis, Yinsheng Wan, Yi Zheng

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


Solar-driven interfacial evaporation shows great prospects for seawater desalination with its rapid fast evaporation rate and high photothermal conversion efficiency. Here, a sustainable, biodegradable, non-toxic, and highly efficient full ocean biomass-based solar-driven evaporator is reported, which is composed of chitosan (CS) hydrogel as the hydratable skeleton and cuttlefish ink (CI) as the photothermal material. Under solar irradiation, the cuttlefish ink powder harvests solar energy and heats the surrounding water. Simultaneously, the water in the three-dimensional network of chitosan hydrogel is rapidly replenished by the interconnected porous structure and the hydrophilic functional groups attached to the polymer chains. With its enlarged evaporation surface, high solar absorptance, adequate water transportation, good salt drainage, and heat localization, the CI/CS-based evaporator achieves a remarkable evaporation rate of 4.1 kg m−2h−1under one sun irradiance (1 kW m−2) with high-quality freshwater yields. This full ocean biomass-based evaporator with abundant raw material availability provides new possibilities for an efficient, stable, sustainable, and environmentally friendly solar evaporator with guaranteed water quality.
Original languageEnglish (US)
Pages (from-to)22313-22324
Number of pages12
Issue number39
StatePublished - Oct 21 2021
Externally publishedYes


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