Acta Optica Sinica, Vol. 40, Issue 24, 2428001 (2020)
Highly-Sensitive Hydrogen-Sulfide Gas Sensor Based on Composite Optical Waveguide
Kediliya Wumaier1, Gulgina Mamtimin2, Maimaitiaisha Sulaiman1, Patima Nizamidin1, and Abliz Yimit1,*
- 1School of Chemical Engineering and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China
- 2College of Chemistry and Environmental Science, Kashgar University, Kashgar, Xinjiang 844006, China
In this paper, a TiO2 film/tin-diffused glass composite optical waveguide (OWG) component is prepared by the dip-coating method, and a zinc phthalocyanine (ZnPc) sensitive layer is fixed on the surface by the spin coating method to prepare a highly-sensitive hydrogen sulfide (H2S) gas sensor based on a composite OWG. The preparation conditions of sensors is optimized. When the dip-coating speed of the dip coater is 80 mm·min -1, the rotating speed of the spin coater is 1600 r·min -1, and the mass fraction of the ZnPc solution is 0.05%, the sensor has the best selective response to H2S gas and can detect the H2S gas with a volume fraction of 1×10 -9. In addition, the sensor shows good stability within one month.
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