Metal-Organic Framework Derived CeO2 Based Two-Dimensional Layered Nanocomposites for Selective Electrochemical Dopamine Detection

摘要

In past decades, nanomaterials have received much attraction in numerous applications. Still now, making and finding a novel nanomaterial is primary and basic research to improve the performance of the existing materials. Recently, Metal-organic frameworks and their derivatives become the hot star for energy and environmental applications owing to controllable structure and large surface area. During this work, we present the preparation of a neoteric CeO2 nanomaterial with two materials siloxene and g-C3N4 from MOF as a sacrificial template by the thermolysis process. Furthermore, we optimize the pyrolysis conditions to obtain higher crystallization of the CeO2 nanomaterials towards the use in electrochemical dopamine detection. Here, we focus on the CeO2 nanomaterial formation with different conditions and optimized the synthesize temperature based on the characterization results. Compared to g-C3N4, siloxene with CeO2 enhances the redox reaction for dopamine detection. The modified CeO2-siloxene electrode showed a low detection limit of 0.292 μΜ and a linear range from 0 to 7.8 μΜ. Our work shows that the CeO2/siloxene electrodes are suitable for application of electrochemical dopamine sensor.