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首页> 外文期刊>International Journal of Heat and Mass Transfer >Preparation of Au-Ag bimetallic nanoparticles for enhanced solar photothermal conversion
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Preparation of Au-Ag bimetallic nanoparticles for enhanced solar photothermal conversion

机译：用于增强太阳光热转化的Au-Ag双金属纳米粒子的制备

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In this study, the solar photothermal conversion performance of bimetallic Au-Ag nanoparticles (NPs) was investigated experimentally. NPs were prepared using a sodium citrate thermal reduction method, using the same procedure and materials to maintain the same particle surface properties. NPs with a tunable plasmon resonance wavelength and demonstrating a high intensity in the visible region were obtained by adjusting the molar ratio of Ag to Au precursors. Experimental results show that blended Au-Ag NPs exhibit a solar photothermal conversion efficiency of 31.41%, which lies between the values of pure Au and Ag NPs under the same NP volume fraction due to the independently scatter light of the Au and Ag NPs in this composite system. Bimetallic Au-Ag NPs demonstrated the highest solar photothermal conversion efficiency of 41.37%, a 31.7% increase over that of blended Au-Ag NPs. The efficiency of the bimetallic Au-Ag NP system was also higher than that of the pure Au NPs (37.81%) with a 40% decrease in Au consumption.
机译：在这项研究中，实验研究了双金属Au-Ag纳米颗粒（NPs）的太阳光热转化性能。使用柠檬酸钠热还原法制备NP，并使用相同的步骤和材料来维持相同的颗粒表面性质。通过调节Ag与Au前体的摩尔比，可获得具有可调的等离振子共振波长并在可见光区具有高强度的NP。实验结果表明，由于金和银纳米粒子的独立散射光，共混的金-银纳米粒子的太阳光热转换效率为31.41％，介于相同的纳米粒子体积分数下，纯金和银纳米粒子的值之间。复合系统。双金属Au-Ag NPs表现出最高的太阳光热转换效率，为41.37％，比混合Au-Ag NPs增长31.7％。双金属Au-Ag NP系统的效率也比纯Au NPs（37.81％）更高，Au消耗降低了40％。

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