背景:重金属离子Cd2+具有剧毒,过量的浓度会对人类的生产和生活产生不利影响,甚至导致重大的公共卫生风险和环境影响。重金属检测有几种成熟的非电化学方法,但是这些方法的特点是成本高,这使得它很难被应用到现场进行及时检测。因此,有必要制备一种新型的环境友好型、能够快速检测环境中Cd2+的电化学传感器,容易和敏感。
结果:在这项研究中,通过简单的水热反应合成了氢键有机骨架(HOFs)。准备好的材料仅由C组成,N和O具有薄层结构。将HOFs集成到新型电化学传感器中,以通过方波阳极溶解伏安法实现对真实水溶液环境中Cd2离子的准确检测。该传感器线性范围宽,检测限低至0.13μg/L。几个真实的水样,比如自来水,湖水,和电子烟消化,对传感器的工作环境进行了仿真分析,结果表明,Cd2+的回收率在95.75%~101.2%之间。
结论:我们通过创新使用HOF作为传感器材料,率先检测电子烟消化物样品中的重金属离子Cd2+,具有极低的背景电流值和高灵敏度,在电化学传感中具有潜在的应用,为环境监测和公共卫生控制提供新思路。
BACKGROUND: The heavy metal ion Cd2+ is acutely toxic, and excessive concentrations can have adverse effects on human production and life, and even lead to significant public health risks and environmental impacts. There are several mature non-electrochemical methods for heavy metal detection, but these methods are characterized by high cost, which makes it difficult to be applied to the field for timely detection. Therefore, it is necessary to prepare a new electrochemical sensor that is environmentally friendly and capable of detecting Cd2+ in the environment quickly, easily and sensitively.
RESULTS: In this study, hydrogen-bonded organic frameworks (HOFs) were synthesized by a simple hydrothermal reaction. The prepared materials consisted of only C, N and O and had a thin lamellar structure. The HOFs were integrated into a novel electrochemical sensor to achieve accurate detection of Cd2+ ions in real aqueous environments by square wave anodic dissolution voltammetry. The sensor has a wide linear range and a detection limit as low as 0.13 μg/L. Several real water samples, such as tap water, lake water, and e-cigarette digest, were analyzed to simulate the working environment of the sensor, and the results showed that the recoveries of Cd2+ ranged from 95.75 % to 101.2 %.
CONCLUSIONS: We pioneered the detection of heavy metal ions Cd2+ in e-cigarette digestate samples with the innovative use of HOFs as the sensor material, which demonstrated the potential application in electrochemical sensing with extremely low background current value and high sensitivity, providing new ideas for environmental monitoring and public health control.