摘要
针对传统贵金属纳米材料制备过程存在步骤繁琐、使用化学还原剂等问题,提出微通道反应器耦合介质阻挡放电(DBD)等离子体的连续流合成策略。在微通道内利用等离子体还原HAuCl_(4)为纳米金,与Al_(2)O_(3)复合生成Au@Al_(2)O_(3),并探究了HAuCl_(4)浓度、停留时间和等离子体功率等因素对产物的影响。结果表明,较优合成条件:HAuCl_(4)浓度为0.5 mmol·L^(-1)、停留时间为6 s、等离子体功率为5.5 W。基于Au@Al_(2)O_(3)纳米颗粒制备的表面增强拉曼散射(SERS)基底对不同化合物均呈现高灵敏、高稳定的检测性能。其中,对罗丹明B的检测下限低至10−12 mol·L^(-1),且在10−4~10−12 mol·L^(-1)内可实现其定量检测。研究成果为功能纳米材料的高效可控制备提供了借鉴。
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.HAuCl_(4)was reduced by plasma within the microchannel to generate AuNPs,and combined with Al_(2)O_(3)to form Au@Al_(2)O_(3)nanoparticles.The effects of HAuCl_(4)concentration,residence time,and plasma power on the products and their surface-enhanced Raman scattering(SERS)performance were systematically investigated.The results showed that optimal synthesis conditions were:HAuCl_(4)concentration of 0.5 mmol·L^(-1),residence time of 6 seconds,and plasma power of 5.5 W.The SERS substrates constructed using Au@Al_(2)O_(3)nanoparticles exhibited high sensitivity and stability in detecting various analytes.In particular,the detection limit for rhodamine B reached as low as 10−12 mol·L^(-1),with quantitative detection achievable over the range of 10−4 to 10−12 mol·L^(-1).These findings provide guidance for the efficient and controllable synthesis of functional nanomaterials.
作者
朱洪飞
张诗茹
林良良
ZHU Hongfei;ZHANG Shiru;LIN Liangliang(Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China)
出处
《高校化学工程学报》
北大核心
2026年第1期123-132,共10页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金(22078125,52004102)
中国博士后科学基金(2023M741472)
江苏省研究生科研与实践创新计划(KYCX25_2679)。
