Quartz crystal microbalance ethanol sensor based on a novel modified HKUST-1 metalorganic frameworks

A novel metal-organic framework (MOF) was synthesized by mixed-ligand strategy using a simple stirring procedure. For the first time, benzotriazole (BTA) was mixed with 1,2,3-benzenetricarboxylic acid (H3BTC) to form, a modified HKUST-1 upon reaction with copper acetate. The morphology of HKUST-1 was a fibrous structure with a length of 30 μm and diameter of 88 nm. On the other hand the morphology of modified HKUST-1 was semicubic nanoparticle with diameter of 300 nm. The prepared MOF nanoparticles were spin coated on a QCM quartz crystal disk and used for sensing vapour of ethanol. The result showed superior sensing property for modified HKUST-1 over HKUST-1. The developed method showed linear response for ethanol vapour in the range of 1-100 ng/l with relative standard deviations (RSD) less than 12%. The developed MOF-based QCM sensor has great capability for measurement of ethanol vapour in various bio-applications such as breath analysis and monitoring of fermentation process in food industries

کلیدواژه ها:

Quartz crystal microbalance ، Modified HKUST-1 ، Ethanol