Uncondensed Graphitic Carbon Nitride on Reduced Graphene Oxide for Oxygen Sensing via a Photoredox Mechanism.

ABSTRACT: Melon, a polymeric, uncondensed graphitic carbon nitride with a two-dimensional structure, has been coupled with reduced graphene oxide (rGO) to create an oxygen chemiresistor sensor that is active under UV photoactivation. Oxygen gas is an important sensor target in a variety of areas including industrial safety, combustion process monitoring, as well as environmental and biomedical fields. Because of the intimate electrical interface formed between melon and rGO, charge transfer of photoexcited electrons occurs between the two materials when under UV (λ = 365 nm) irradiation. A photoredox mechanism wherein oxygen is reduced on the rGO surface provides the basis for sensing oxygen gas in the concentration range 300-100 000 ppm. The sensor response was found to be logarithmically proportio

SUBMITTER: Ellis JE 

PROVIDER: S-EPMC6543844 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature