Liao Yijun, Li Yixing, Zhao Rongzhi, Zhang Jian, Zhao Lizhong, Ji Lianze, Zhang Zhengyu, Liu Xiaolian, Qin Gaowu, Zhang Xuefeng
Key Laboratory for Anisotropy and Texture of Materials (MOE), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310012, China.
Natl Sci Rev. 2022 Mar 4;9(6):nwac041. doi: 10.1093/nsr/nwac041. eCollection 2022 Jun.
Multi-metallic nanoparticles have been proven to be an efficient photothermal conversion material, for which the optical absorption can be broadened through the interband transitions (IBTs), but it remains a challenge due to the strong immiscibility among the repelling combinations. Here, assisted by an extremely high evaporation temperature, ultra-fast cooling and vapor-pressure strategy, the arc-discharged plasma method was employed to synthesize ultra-mixed multi-metallic nanoparticles composed of 21 elements (FeCoNiCrYTiVCuAlNbMoTaWZnCdPbBiAgInMnSn), in which the strongly repelling combinations were uniformly distributed. Due to the reinforced lattice distortion effect and excellent IBTs, the nanoparticles can realize an average absorption of >92% in the entire solar spectrum (250 to 2500 nm). In particular, the 21-element nanoparticles achieve a considerably high solar steam efficiency of nearly 99% under one solar irradiation, with a water evaporation rate of 2.42 kg m h, demonstrating a highly efficient photothermal conversion performance. The present approach creates a new strategy for uniformly mixing multi-metallic elements for exploring their unknown properties and various applications.
多金属纳米颗粒已被证明是一种高效的光热转换材料，其光吸收可通过带间跃迁（IBT）得以拓宽，但由于排斥性组合之间强烈的不混溶性，这仍然是一个挑战。在此，在极高蒸发温度、超快冷却和蒸气压策略的辅助下，采用电弧放电等离子体法合成了由21种元素（FeCoNiCrYTiVCuAlNbMoTaWZnCdPbBiAgInMnSn）组成的超混合多金属纳米颗粒，其中强排斥性组合均匀分布。由于增强的晶格畸变效应和优异的带间跃迁，这些纳米颗粒在整个太阳光谱（250至2500纳米）中可实现平均吸收率>92%。特别是，21元素纳米颗粒在一个太阳辐射下实现了近99%的相当高的太阳能蒸汽效率，水蒸发速率为2.42千克·平方米·小时，展现出高效的光热转换性能。本方法为均匀混合多金属元素以探索其未知特性和各种应用创造了一种新策略。
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