| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Carbon Material/Chitin Composite Hydrogel for Efficient Solar Desalination |
| LI Xin1,2, GUO Lin2, HUANG Jindi2, WANG Li1,2, XIE Haiquan2, YE Liqun1
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1 Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, College of Materials and Chemical Engineering, China Three Gorges University, Yichang 443002,Hubei, China
2 Engineering Technology Research Center of Henan Province for Solar Catalysis, Nanyang Normal University, Nanyang 473061, Henan, China |
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Abstract With the acceleration of the world's industrialization and urbanization, the freshwater resources that can be directly used by human beings are declining, and the demand for freshwater resources is increasing sharply. Freshwater preparation and purification technologies become more and more critical. Solar seawater desalination technology converts endless solar energy into heat, helping heat the evaporated seawater into steam, and finally the steam was condensed to produce fresh water; it is a promising technology to solve the problem of fresh water shortage. However, solar seawater desalination has always been restricted by high cost and low efficiency of solar absorbing materials. In this work, a new type of composite hydrogel was designed and prepared. The composite hydrogel was composed of sunlight absorber (carbon material) and natural polymer (chitin), which increased sunlight utilization and improved seawater desalination efficiency up to 75%. Under 1 kW/m2 sunlight, the evaporation rate exceeded 1.5 kg/(m2·h), and the highest steam efficiency is 98.34%. Moreover, the composite hydrogel showed the advantages of low cost, porous structure, simple manufacturing process, strong recyclability and excellent mechanical stability. Therefore, the carbon material/chitin composite hydrogel as a solar light absorber has the potential to convert light into heat energy, opening up a new way for seawater desalination.
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Published: 25 June 2022
Online: 2022-06-24
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| Fund:National Natural Science Foundation of China (51872147), the 111 Project (D20015), and the Program for Innovative Research Team of Science and Technology in the University of Henan Province (19IRTSTHN025). |
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2022, Vol. 36 
