Journal
MATERIALS LETTERS
Volume 186, Issue -, Pages 193-197Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2016.10.012
Keywords
Graphene quantum dots; TiO2; Sensors; VOCs; Thin films
Funding
- Startup Foundation for Introducing Talent of NUIST, China [2241131301098]
- NSF, China [BK20160091]
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Crystalline nanoporous GQDs-TiO2 thin films are synthesized under a 120 degrees C water vapor hydrothermal treatment, and water soluble GQDs are successfully loaded in the thin film in optimum density to form novel GQDs-TiO2 heterojunctions. The optimum sensing performance is achieved at GQDs content of 1.6 wt%, with the isopropanol response value up to 13.8 at 50 ppm and a short response time of similar to 18 s at room temperature. In general the synthesis procedure described in this work has the advantage of being easy, cost efficient, and highly suitable for the fabrication of gas sensor with the application for monitoring specific harmful and toxic volatile organic compounds (VOCs) in early diagnosis of cancer.
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