Graphene Oxide Based Selective VOCs Sensor for Indoor Air Quality Monitoring

Ho Sang Ahn; Byung Kwon Jung; Jae Ro Park; Jin Chul Joo

doi:10.4028/www.scientific.net/MSF.804.39

Paper Titles

Synthesis of Diglycerol Ester as Insulating Oil for Offshore Wind Turbine Transformer
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The Effects of Deposited Material and Loaded Amount within Synthesis of TMP-Ester
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Effect of CaO Content on Yb: YAG Disk Laser Weldability of AZ31 Mg Alloy
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Fabrication and Electrochemical Performance of Nitrogen-Doped Graphene Synthesized by Hydrothermal Method
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Graphene Oxide Based Selective VOCs Sensor for Indoor Air Quality Monitoring
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Thermocatalytic Degradation of Low Density Polyethylene Films at Artificial Aging Treatment under Lower Temperature
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Low-Temperature Thermocatalytic Degradation of Polyethene Films by Nano-Titanium Dioxide in Water
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Study on Aqueous Viscosity Behaviors of Hydroxypropyl Methylcellulose Hydrosol and Konjac Glucomanan Hydrosol
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Effect of Lignin and RLDPE Soil Amendments on Water Holding Capacities of Desert
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Graphene Oxide Based Selective VOCs Sensor for Indoor Air Quality Monitoring

Abstract:

We suggest new approach to monitor indoor air quality by using selective VOCs sensor specialized to detect formaldehyde, benzene, toluene with distinct sensitivity. One of the major drawbacks in semiconductor type gas sensors is poor selectivity despite of high sensitivity in detection of trace level of gases. Graphene oxide was deposited as a sensing layer on silicon dioxide sensor with platinum bottom electrodes. Thermal treatments under varying temperature, time, and gas, were performed to reduce graphene oxide at a certain amount as desired. Depending on the degree of reduced graphene oxide, obvious difference in functional groups in terms of type and number was observed. Following sensing behavior measurements confirmed that partial reduction of graphene oxide determined the selective gas adsorption to influence the sensing behavior to improve the selective VOCs detection for better indoor air quality.