CoPP-Functionalized TIO 2 Nanoparticles for Highly Sensitive and Reliable VOC Detection
international conference on solid state sensors actuators and microsystems(2019)
Abstract
This paper reports the chemiresistive sensor for volatile organic compounds (VOCs) based on titanium dioxide (TiO 2 ) nanoparticles functionalized with cobalt-porphyrin (CoPP) for the first time. Herein, CoPP-functionalized TiO 2 exhibited enhanced response (155%) on exposure to 10 ppm toluene at an operating temperature of 300°C. The proposed VOCs sensor with a micro-heater could detect toluene and p-xylene at the concentrations ranging from 10 ppm down to 1 ppm with low power consumption (21 mW). Reliable and repeatable detection of p-xylene on exposure to 10 ppm was also achieved over 20 cycles for 10 hours.
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Key words
Titanium dioxide (TiO2), metalloporphyrin, functionalization, gas sensor
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