Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education, China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China.
Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education, China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China.
Food Chem. 2019 Sep 15;292:253-259. doi: 10.1016/j.foodchem.2019.04.034. Epub 2019 Apr 18.
A sensitive electrochemical sensor for BPA based on the AuPd incorporated carboxylic multi-walled carbon nanotubes (MWCNT) with synergetic amplified current signal was developed, where MWCNT was used as supporter to improve electron transport and poly (diallyldimethylammonium chloride) (PDDA) was used as dispersant for MWCNT and overcome the intrinsic van der Waals interactions between MWCNT and further increase metal NPs loading. The prepared MWCNT-PDDA-AuPd showed enhanced electrocatalytic performance toward BPA, which is better than those of homologous monometallic counterparts and MWCNT-PDDA though the content of AuPd is really low. The peak currents of BPA increased with BPA concentration in linear range of 0.18-18 μM and the detection limit of 60 nM. The sensor showed high sensitivity, good stability, repeatability and can be used to detect BPA in milk and water samples with good performance, which demonstrate that MWCNTs-PDDA-AuPd nanocomposite may be an attractive material in applications of environmental and food analysis.
基于负载金钯纳米粒子的羧酸化多壁碳纳米管（MWCNT）的高灵敏度电化学传感器用于检测双酚 A，协同放大电流信号。其中，MWCNT 用作载体以提高电子传输性能，聚二烯丙基二甲基氯化铵（PDDA）用作 MWCNT 的分散剂，克服了 MWCNT 之间的固有范德华相互作用，并进一步增加金属 NPs 的负载量。所制备的 MWCNT-PDDA-AuPd 对 BPA 表现出增强的电催化性能，优于同系单金属对应物和 MWCNT-PDDA，尽管 AuPd 的含量确实很低。在 0.18-18 μM 的线性范围内，BPA 的峰电流随 BPA 浓度的增加而增加，检测限为 60 nM。该传感器具有高灵敏度、良好的稳定性、重复性，可用于检测牛奶和水样中的 BPA，性能良好，表明 MWCNTs-PDDA-AuPd 纳米复合材料在环境和食品分析应用中可能是一种有吸引力的材料。
