Au@Al2O3 纳米颗粒的连续流制备及其表面增强拉曼散射性能
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文章编号：1003-9015（2026）01-0123-10
关键词：微反应器；等离子体；过程强化； Au@Al2O3 纳米颗粒；表面增强拉曼散射 中图分类号：0539 文献标志码：A DOI：10.3969/j.issn.1003-9015.2025.00.019
Continuous-flow synthesis of Au@Al2O3 nanoparticles and their surface-enhanced Raman scattering performance
ZHU Hongfei， ZHANG Shiru， LIN Liangliang （Key Laboratory of Synthetic and Biological Coloids，Ministryof Education，School of Chemical and Material Engineering，Jiangnan University，Wuxi214122，China）
Abstract： To address the complex procedures and reliance on chemical reductants in conventional noble metal nanomaterial synthesis， a continuous-flow synthesis strategy was proposed by coupling a microchannel reactor with dielectric barrier discharge（DBD）plasma. HAuCl4 wasreduced by plasma within the microchannel to generate AuNPs，and combined with Al2O3 to form Au@Al2O3 nanoparticles.The effects of HAuCl4 concentration， residence time， and plasma power on the products and their surface-enhanced Raman scatering（SERS） performance were systematically investigated.The results showed that optimal synthesis conditions were： HAuCl4 （204号 concentration of 0.5mmol⋅L-1 ，residence time of 6 seconds，and plasma power of 5.5W .The SERS substrates constructed using Au@Al2O3 nanoparticles exhibited high sensitivity and stability in detecting various analytes. In particular， the detection limit for rhodamine B reached as low as 10-12mol⋅L-1 ，with quantitative detection achievable over the range of 10-4 to 10-12mol⋅L-1 . These findings provide guidance for the eficient and controllable synthesis of functional nanomaterials.
Key words：microreactor； plasma； process intensification； Au@Al2O3 nanoparticles； SERS
1前言
纳米金（AuNPs）因其优异的稳定性和表面增强拉曼散射（SERS）性能备受关注[]。（剩余13609字）