Affiliation:
1. Institut National de la Recherche Scientifique Varennes J3X 1P7 Canada
2. State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China
3. School of Environmental Science and Engineering Shandong University Qingdao 266237 China
4. Department of Mechanical Engineering McGill University Montreal H3A 0C3 Canada
5. Center for Advancing Electronics Dresden and Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany
6. School of Chemistry and Chemical Engineering University of Jinan Jinan 250022 China
Abstract
AbstractPlasmonic nanoparticles (NPs), such as Au, Ag, and Cu, are considered as promising photothermal materials and attract extensive attention for freshwater production by solar steam generation. However, high cost, narrow absorption range and/or poor stability greatly limit their practical applications. Herein, a high‐efficiency solar energy conversion material consisting of low‐cost non‐metal, extremely thermally‐stable plasmonic TiN NPs and hydrophilic semi‐reduced graphene oxide (semi‐rGO), with broadband solar absorption capability, by a fast in situ microwave reduction method is prepared. The 2D semi‐rGO serves as a support for the loading of plasmonic NPs, and meanwhile accelerates the transport and evaporation of water due to its hydrophilicity. Then, decoration of plasmonic TiN NPs further enhances the solar photon absorption and hydrophilicity while suppressing the heat loss, thanks to the layered structure of TiN/semi‐rGO, improving overall solar energy utilization. Owing to the enhanced absorption and unique layered nanostructure with strong interfacial interaction, the optimal sample of TiN/semi‐rGO‐25% absorber achieves a high and stable water evaporation rate of ≈1.76 kg m−2 h−1 with an energy efficiency as high as 99.1% under 1 sun illumination. Furthermore, this plasmonic TiN/semi‐rGO absorber is capable of producing high‐quality freshwater from sustainable seawater desalination and wastewater purification processes.
Funder
Natural Sciences and Engineering Research Council of Canada
Canada Research Chairs
Fonds de recherche du Québec – Nature et technologies
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
Cited by
24 articles.
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