基于聚多巴胺纳米球/十六烷基三甲基溴化铵复合材料的亚硝酸盐电化学传感器研究  

Study on nitrite electrochemical sensor based on polydopamine nanospheres/hexadecyltrimethylammonium bromide composite

作　　者：程田田 陆佳丹 张静[1] Cheng Tiantian;Lu Jiadan;Zhang Jing(School of Petrochemical Engineering,Changzhou University,Changzhou 213264)

机构地区：[1]常州大学石油化工学院,常州213264

出　　处：《化工新型材料》2024年第5期249-254,共6页New Chemical Materials

基　　金：常州市自然科学项目(CE20212039和CE20212030)。

摘　　要：以盐酸多巴胺为单体,在三羟甲基氨基甲烷溶液中聚合,合成了聚多巴胺纳米球(PDANSs)。采用扫描电镜和透射电镜对PDANSs进行了形貌表征,PDANSs直径为200~300nm。将制备的PDANSs在十六烷基三甲基溴化铵(CTAB)溶液中超声,通过静电作用得到复合物(PDANSs/CTAB),并将复合物分散液滴涂在电极表面得到PDANSs/CTAB修饰电极。将PDANSs/CTAB修饰电极用于溶液中亚硝酸盐的富集,对电极上富集的亚硝酸盐含量用差分脉冲伏安法进行了测定,构建了亚硝酸盐电化学传感器。该传感器检测亚硝酸钠的线性范围为0.2~2000μmol/L,检出限为0.08μmol/L,且具有较好的重现性和稳定性。将该传感器用于腌制肉样品中亚硝酸盐的检测,回收率范围为98.1%~104.0%,说明此方法准确度很好,该传感器能用于腌制肉样品中亚硝酸盐的分析。Polydopamine nanospheres(PDANSs)were synthesized by polymerization of dopamine hydrochloride as a monomer in tris(hydroxymethyl)aminometha solution.The morphology of PDANSs was characterized using scanning electron microscopy and transmission electron microscopies,revealing a diameter of 200~300nm.The prepared PDANSs were sonicated in a hexadecyltrimethylammonium bromide(CTAB)solution,and PDANSs/CTAB composite was obtained through the electrostatic interaction.The prepared composite dispersant was drop-coated on the electrode surface to obtain a PDANSs/CTAB-modified electrode.The PDANSs/CTAB-modified electrode was used to enrich nitrite in solution,and the content of nitrite enriched on the electrode was determined by differential pulse voltammetry,and a nitrite electrochemical sensor was constructed.The linear range of the prepared sensor for detecting sodium nitrite was 0.2~2000μmol/L,and detection limit was 0.08μmol/L,with good reproducibility and stability.The sensor was used for the detection of nitrite in pickled meat samples,with a recovery range of 98.1%to 104.0%,indicating that the accuracy of this method was very good,and the sensor could be used for nitrite analysis in pickled meat samples.

关 键 词：聚多巴胺纳米球 十六烷基三甲基溴化铵 复合材料 电化学传感器 亚硝酸盐 

分 类 号：O646[理学—物理化学]