Fenghong Chu, Jiameng Zhang, Anduo Hu, Zhenglan Bian, Lu Cao, Jiawen Han. Preparation of Salt Spray‐Resistant WO3 Thin Films and Their Hydrogen Sensitivity Performance[J]. Chinese Journal of Lasers, 2025, 52(11): 1103101
- Chinese Journal of Lasers
- Vol. 52, Issue 11, 1103101 (2025)
Fig. 1. Reaction mechanism of FAS and WO3 film
Fig. 2. Hydrophobic mechanism of WO3 film modified by FAS
Fig. 3. Reaction mechanism of KH-570 and WO3 film
Fig. 4. Preparation process of salt spray-resistant hydrogen sensitive film
Fig. 5. Fiber hydrogen sensing system
Fig. 6. Adsorption of water molecules on WO3 surface
Fig. 7. Film contact angles in orthogonal experiments
Fig. 8. Hydrogen sensitivity performance of FAS-WO3 films
Fig. 9. Thin film characterization. (a) SEM image of FAS-WO3 film; (b) SEM image of WO3 film; (c) EDS image of white particles; (d) FTIR images of FAS-WO3 and WO3 films
Fig. 10. Hydrogen sensitivity performance of KH-570 modified films with different R in salt spray environment. (a) Sensitivity;
Fig. 11. Dissolution of KH-570 in mixed solvent of water and ethanol
Fig. 12. FTIR spectra of FAS-WO3 film before and after KH-570 modification
Fig. 13. Contact angles of films
Fig. 14. Experimental environment. (a) 85% humidity environment; (b) 90% salt spray environment;
Fig. 15. Hydrogen sensitivity performance of films in different environments. (a) Sensitivity; (b) response time
Fig. 16. Repeatability response curve of modified film
Fig. 17. Effect of placement time on hydrogen sensitivity of film in air. (a) Sensitivity; (b) response time
Fig. 18. Effect of placement time on hydrogen sensitivity of film in 90% salt spray environment. (a) Sensitivity; (b) response time
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Table 1. Design scheme of orthogonal experiment
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