Sulfonic functionalized UIO-66 octahedrons for detecting ppb level cadaverine in water

Abstract

Cadaverine, a compound produced during biological decomposition, possesses a degree of acute toxicity to humans and poses risks to aquatic life. As the need for cadaverine detection intensifies, quartz crystal microbalance (QCM) technology stands out due to its exceptional sensitivity and consistent performance. In this research, we synthesized sulfonic acid-functionalized UIO-66 (UIO-66-SO₃H) octahedrons employing a solvothermal approach. These UIO-66-SO₃H octahedrons served as the sensing element in a QCM sensor specifically designed for detecting cadaverine in water. Notably, the sensor demonstrated the ability to detect cadaverine at a concentration of 1 part per billion (ppb), with a frequency shift of approximately 48 Hz within 300 s. Furthermore, we conducted a comprehensive analysis of the sensor's continuous response, selectivity, and resistance to interference. Our findings suggest that this cadaverine detection method is swift, economical, and potentially adaptable to diverse water pollution inspection scenarios resulting from biological decomposition.