材料科学
等离子体子
光电子学
光热治疗
纳米技术
蒸发
纳米颗粒
热力学
物理
作者
Fan Yang,Jinxing Chen,Zuyang Ye,Dawei Ding,Nosang V. Myung,Yadong Yin
标识
DOI:10.1002/adfm.202006294
摘要
Abstract Solar steam generation technologies have gained increasing attention due to their great potential for clean water generation with low energy consumption. The rational design of a light absorber that can maximize solar energy utilization is therefore of great importance. Here, the synthesis of Ni@C@SiO 2 core–shell nanoparticles as promising light absorbers for steam generation by taking advantage of the plasmonic excitation of Ni nanoparticles, the broadband absorption of carbon, and the protective function and hydrophilic property of silica is reported. The nanoparticle‐based evaporator shows an excellent photothermal efficiency of 91.2%, with an evaporation rate of 1.67 kg m −2 h −1 . The performance can be further enhanced by incorporating the nanoparticles into a polyvinyl alcohol hydrogel to make a composite film. In addition, utilizing the magnetic property of the core–shell particles allows the creation of surface texture in the film by applying an external magnetic field, which helps increase surface roughness and further boost the evaporation rate to as high as 2.25 kg m −2 h −1 .
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