Highly-Sensitive Hydrogen-Sulfide Gas Sensor Based on Composite Optical Waveguide

Wumaier Kediliya; Mamtimin Gulgina; Sulaiman Maimaitiaisha; Nizamidin Patima; Yimit Abliz

doi:10.3788/AOS202040.2428001

Acta Optica Sinica, Volume. 40, Issue 24, 2428001(2020)

Highly-Sensitive Hydrogen-Sulfide Gas Sensor Based on Composite Optical Waveguide

Wumaier Kediliya¹, Mamtimin Gulgina², Sulaiman Maimaitiaisha¹, Nizamidin Patima¹, and Yimit Abliz^1、*

Author Affiliations

¹School of Chemical Engineering and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China

²College of Chemistry and Environmental Science, Kashgar University, Kashgar, Xinjiang 844006, China

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Figures & Tables(9)

Fig. 1. Structure of composite OWG

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Fig. 2. Self-assembled OWG testing system

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Fig. 3. SEM images of thin films. (a) ZnPc thin film; (b) ZnPc thin film/TiO₂ thin film

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Fig. 4. UV-vis spectra of ZnPc thin film/TiO₂ thin film before and after its contact with various gases. (a) Contact with VOCs; (b) contact with H₂S gas

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$Optimization of fabrication conditions of sensors based on ZnPc thin film/TiO2 thin film /tin-diffused glass composite OWG. (a) Dip-coating speed of dip coater; (b) mass fraction of ZnPc; (c) rotating speed of spin coater$

Fig. 5. Optimization of fabrication conditions of sensors based on ZnPc thin film/TiO₂ thin film /tin-diffused glass composite OWG. (a) Dip-coating speed of dip coater; (b) mass fraction of ZnPc; (c) rotating speed of spin coater

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$OWG response of sensor fabricated under optimum conditions to various gases. (a) VOCs with volume fraction of 10-3; (b) H2S with volume fraction of 10-4$

Fig. 6. OWG response of sensor fabricated under optimum conditions to various gases. (a) VOCs with volume fraction of 10^-3; (b) H₂S with volume fraction of 10^-4

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$OWG response of sensors based on ZnPc thin film/TiO2 thin film /tin-diffused glass composite OWG to H2S gases with different concentrations. (a) Low concentration test when H2S volume fraction is 10-9-10-7; (b) low concentration test when H2S volume fraction is 10-6-10-4; (c) linear relationship$

Fig. 7. OWG response of sensors based on ZnPc thin film/TiO₂ thin film /tin-diffused glass composite OWG to H₂S gases with different concentrations. (a) Low concentration test when H₂S volume fraction is 10^-9-10^-7; (b) low concentration test when H₂S volume fraction is 10^-6-10^-4; (c) linear relationship

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Fig. 8. Stability test of sensors based on ZnPc thin film/TiO₂ thin film /tin-diffused glass composite OWG

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Table 1. Fabrication conditions of sensor
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Table 1. Fabrication conditions of sensor
Dip-coating speed /(mm·min^-1) Mass fraction of ZnPc /% Rotating speed /( r·min^-1)
50 0.03 1200
80 0.05 1600
110 0.07 2000

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Wumaier Kediliya, Mamtimin Gulgina, Sulaiman Maimaitiaisha, Nizamidin Patima, Yimit Abliz. Highly-Sensitive Hydrogen-Sulfide Gas Sensor Based on Composite Optical Waveguide[J]. Acta Optica Sinica, 2020, 40(24): 2428001

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