基于石墨烯纳米阵列电极的塑化剂快速检测的研究

The ubiquitous presence of phthalates as a food pollutant and containment appears severely in our daily life, merely depending on the supervision of the administration is insufficient to set the consumers free of anxious about the phthalates. Developing highly sensitive, rapid and inexpensive household detector for phthalates analysis becomes most significant in food safety subject. The present study applies thermolyzed alsphalt reaction and mechanically peeling nano-arry mica musk to syntheses graphene nano-array working electrode, characterizes the electrochemical impedance spectrum of phthalates in aqueous samples. The key part of this research is to optimize the dimensional parameters of each nano-electrode, discover the interaction of each nano-electrode and how it affects the electrochemical impedance spectrum, explore and supplement the relevant theory such as small size effect and marginal effect, in order to interpret the experimental data reasonably. The goal of this study is to detect 10 ppb phthalates within 5 minutes. The achievements of this study may contribute to developing portable household devices and sensors.

塑化剂的危害已渗透到人们的日常生活，单纯的依赖生产与质量监督部门的监控，不足以消除消费者对塑化剂危害的忧虑。研究开发灵敏度高、检测时间迅速、成本低廉的家用型塑化剂检测器在食品安全方面非常重要。本研究拟采用热裂解反应结合机械剥离纳米微孔阵列云母片的方法，合成石墨烯纳米阵列工作电极，运用电化学阻抗谱的表征液体样品中塑化剂的含量。重点研究石墨烯纳米阵列电极的直径及单个电极间的空间排布对电化学阻抗谱信号表征和阻抗图谱模拟的影响，着重探索纳米阵列电极的小尺寸效应、边缘效应和单个电极间的相互作用等科学问题，对现有的纳米阵列电极电化学理论进行合理的修正，实现对宏观实验结果的合理解释。本项目预期对液体样品中塑化剂的检测灵敏度达到10ppb；单个样品检测时间不超过5分钟。本研究的实施对微小型检测器，传感器的研究和应用具有一定的科学指导意义。

研究基于石墨烯纳米阵列电极的电化学阻抗谱对白酒中塑化剂的快速检测的基础理论与方法，其主要内容包括：石墨烯纳米阵列电极的制备与表征；石墨烯纳米阵列电极对白酒中总塑化剂的高灵敏度检测的理论与方法；石墨烯纳米阵列电极对白酒中各种塑化剂的特异性检测理论与方法。项目旨在全面地、系统地研究石墨烯纳米阵列电极与白酒种塑化剂的在电化学阻抗谱扫描下的相互作用机理，为开发家用型白酒塑化剂快速检测仪奠定基础，是我国白酒安全领域得到进一步拓展，助力食品安全的需求。