Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 315, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2020.128058
Keywords
graphitic carbon nitride; humidity sensor; diaper alarm; non-contact; testing
Funding
- National Natural Science Foundation of China [51777215]
- Fundamental Research Funds for the Central Universities of China [18CX07010A]
- Open Fund of Key Laboratory of Marine Spill Oil Identification and Damage Assessment Technology, State Oceanic Administration of China [201801]
- College Students' Innovation and Entrepreneurship Training Program of China University of Petroleum (East China) [20190313]
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Currently, most humidity sensors have problems such as narrow measurement range, long response time and poor reversibility. In this work, we developed a resistive humidity sensor based on graphitic carbon nitride (g-C3N4) nanosheet film on epoxy substrate with Cu/Ni electrodes. The structure, morphology and composition properties of the g-C3N4 were analyzed by XRD, SEM, TEM, FTIR and XPS. The humidity sensing results show that the g-C3N4 film sensor has the advantages of high sensitivity (6457548.8 Omega/%RH), good reversibility and fast response/recovery time (0.3/8.5 s). The humidity sensing performance of g-C3N4 overpasses the other sensors based on graphene oxide (GO), ZnO, anodic aluminum oxide (AAO), SnO2, Bi6S2O15 and common composites. The g-C3N4 film sensor exhibits great application prospect in humidity alarm device, automatic diaper alarm and non-contact testing of cultural relics, which have advantages such as strong anti-interference capability, low cost and easy to use.
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