TBAOH intercalated WO3 for high-performance optical fiber hydrogen sensor.

Considering the poor response performance of fiber bragg grating (FBG) sensor based on WO 3 , in this paper, a polymer intercalated method is proposed to accomplish high-performance optical fiber hydrogen sensor. Tetrabutylammonium hydroxide (TBAOH) molecule intercalated WO 3 are synthesized successfully and the effect of the intercalation amount to sensing performance has been investigated. The experiment results show that, at the concentration of 10,000 ppm, the t 90 response time of the sensor based on TBAOH-Pt/WO 3 is improved by 308% compared with that of WO 3 FBG sensor. In addition, the FBG hydrogen sensor based on the novel materials can detect hydrogen concentration ranging from 300 ppm to 12,000 ppm in air, demonstrating excellent stability and repeatability, which show wide application prospect in the future. • A polymer intercalated method can expand the layer spacing of WO 3 effectively. • Larger layer spacing means more exposed active sites. • Larger layer spacing means lower diffusion activation energy for H atom. • The novel sensor shows the fastest response of 34 s to 1% H 2 concentration. [ABSTRACT FROM AUTHOR]