聚乙烯醇载银海绵的制备及界面光热驱动水蒸发性能

利用光热材料的太阳能水蒸发技术是一种绿色、 环保地解决淡水资源短缺的重要技术, 但光热材料的制备成本、 蒸发效率和热损失等因素限制了其推广应用. 本文采用一锅法制备了聚乙烯醇载银海绵(AgNPs/PVA)太阳能界面蒸发器, 并研究了AgNPs含量对AgNPs/PVA在太阳能驱动水蒸发过程中光热性能的影响. 研究结果表明, 当AgNPs的质量为PVA的10%时, 制备的AgNPs/PVA在1 kW/m ²的太阳光强度下具有最优的蒸发速率, 水蒸发速率可达1.62 kg?m ^?2?h ^?1, 为纯水(0.42 kg?m ^?2?h ^?1)的3.9倍. 本文制备的AgNPs/PVA具有制备工艺简单、 亲水性能优良和蒸发性能良好的特点, 在太阳能驱动水蒸发领域具有较大的应用前景.

Preparation of Silver-loaded Polyvinyl Alcohol Sponge and Its Interfacial Photothermal Driven Water Evaporation Performance

The utilization of photothermal materials to evaporate water under solar energy is a critical green and environmental protection technology for addressing the scarcity of freshwater resources， but its popularity and application are limited by factors such as preparation cost， evaporation efficiency， and heat loss of photothermal materials. Here， silver nanoparticles loaded polyvinyl alcohol sponge（AgNPs/PVA） solar interface evaporator was prepared by one-pot method， and the effect of AgNPs content on the photothermal performance of AgNPs/PVA in solar-driven water evaporation was investigated. The synthesized AgNPs/PVA exhibited the optimum evaporation rate under 1 kW/m ² sunlight intensity when the mass of AgNPs was 10% that of PVA， according to the results. Water may evaporate at a rate of 1.62 kg?m ^?2?h ^?1， which is 3.9 times that of pure water（0.42 kg?m ^?2?h ^?1）. The prepared AgNPs/PVA showed potential application in the field of solar driven-water evaporation due to the simple preparation process， outstanding hydrophilicity and strong evaporation performance.