Cu-BTC Functional Microdevices as Smart Tools for Capture and Preconcentration of Nerve Agents

• DOI: 10.1021/acsami.0c07364
• Publication Date: 2020-06-22T17:23:11Z
• Authors: F. Almazán; M. A. Urbiztondo; P. Serra-Crespo; B. Seoane; J. Gascon; J. Santamaría; M. P. Pina
• Keywords: Thermogravimetric analysis; Specific surface area

Cu-based metal–organic framework (MOF) microdevices are applied in sampling and preconcentration of nerve agents (NAs) diluted gaseous streams. An situ electrochemical-assisted synthesis a Cu-benzene-1,3,5-tricarboxylate (BTC) thick film is carried out to functionalize Cu-modified glass substrate. This simple, rapid, reproducible, easy-to-integrate MOF approach enables the microfabrication functional micro-preconcentrators with large Brunauer–Emmett–Teller (BET) surface area (above 2000 cm2) an active pore volume 90 nL) for efficient adsorption agent molecules along microfluidic channel 2.5 cm length. The equilibrium capacity bulk material has been characterized through thermogravimetric analysis after exposure controlled atmospheres sarin gas surrogate, dimethyl methylphosphonate (DMMP), both dry humid conditions (30% RH at 293 K). Breakthrough tests ppm level (162 mg/m3) reveal capacities up 691 mg/g. performance such μ-devices when dealing highly surrogate atmosphere, i.e., 520 ppbV (2.6 298 K, leads coefficients 171 sample 600 STP cm3. We demonstrate potentialities Cu-BTC as smart first responder tools "on-field" detection phase relevant conditions.