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Directionally tailoring micro-nano hierarchical tower structured Mn_(0.6)Ni_(1.4)Co_(2)O_(y) toward solar interfacial evaporation

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Journal of Materials Science & Technology 2023年第27期158卷 21-30页

作者： Yi Zhang Shujuan Tan Tong Xu Zhuoting Zhou Guanbgin Ji College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China

solar interfacial evaporation has been considered as a promising method to alleviate fresh water re-sources *** shortage of freshwater resources requires advanced materials that can accelerate the evaporation of water by the ***,the simple structure of photothermal materials are vitally restricted by finite light ***,this work presents a strategy for the synthesis of a spinel-type micro-nano hierarchical tower structure solar absorbent(Mn_(0.6)Ni_(1.4)Co_(2)O_(y))with the low forbidden band(=1.56 eV)and high absorption(97.88%).The products show great potential in solar-thermal energy conversion by creating a trapping *** prepared solar absorbent and epoxy resin are evenly mixed and then fully immersed in polyurethane(PU)sponge for water *** hydrophilic and porous Mn_(0.6)Ni_(1.4)Co_(2)O_(y)@PU sponge can quickly deliver water upwards,suppress the heat loss,and concentrate the absorbed heat on the evaporation of *** products exhibited an excellent evaporation rate of 2.261 kg m^(-2) h^(-1) and an impressive evaporation efficiency of 156%under a single sun ***,the samples also can maintain the stability and recycling performance for a long *** findings show that Mn_(0.6)Ni_(1.4)Co_(2)O_(y) have great application prospects in the solar interfacial evaporation.

关键词： solar interfacial evaporation Photothermal conversion Spinel Micro-nano hierarchical structure

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Biomass-enhanced Janus sponge-like hydrogel with salt resistance and high strength for efficient solar desalination

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GREEN ENERGY & ENVIRONMENT 2024年第11期9卷 1698-1710页

作者： Chu, Aqiang Yang, Meng Chen, Juanli Zhao, Jinmin Fang, Jing Yang, Zhensheng Li, Hao Hebei Univ Technol Sch Chem Engn & Technol Natl Local Joint Engn Lab Energy Conservat Chem Pr Tianjin 300401 Peoples R China

interfacial solar-driven evaporation technology shows great potential in the field of industrial seawater desalination, and the development of efficient and low-cost evaporation materials is key to achieving large-scale applications. Hydrogels are considered to be promising candidates; however, conventional hydrogel-based interfacial solar evaporators have difficulty in simultaneously meeting multiple requirements, including a high evaporation rate, salt resistance, and good mechanical properties. In this study, a Janus sponge-like hydrogel solar evaporator (CPAS) with excellent comprehensive performance was successfully constructed. The introduction of biomass agar (AG) into the polyvinyl alcohol (PVA) hydrogel backbone reduced the enthalpy of water evaporation, optimized the pore structure, and improved the mechanical properties. Meanwhile, by introducing hydrophobic fumed nano-silica aerogel (SA) and a synergistic foaming-crosslinking process, the hydrogel spontaneously formed a Janus structure with a hydrophobic surface and hydrophilic bottom properties. Based on the reduction of the evaporation enthalpy and the modulation of the pore structure, the CPAS evaporation rate reached 3.56 kg m2 h-1 under one sun illumination. Most importantly, owing to the hydrophobic top surface and 3D-interconnected porous channels, the evaporator could work stably in high concentrations of salt-water (25 wt% NaCl), showing strong salt resistance. Efficient water evaporation, excellent salt resistance, scalable preparation processes, and low-cost raw materials make CPAS extremely promising for practical applications. (c) 2023 Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： solar interfacial evaporation Hydrogel Biomass Desalination Salt resistance

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