Effects of the Dopant Ratio on Polyaniline Coated Fiber Bragg Grating for pH detection
Source abstract
Abstract
Abstract Polyaniline (PAni) coated Fiber Bragg Grating (FBG) for pH detection is presented in this study. PAni was synthesized at low temperature through chemical oxidation by using aniline (Ani) as monomer, ammonium persulphate (APS) as oxidant and dioctyl sodium sulfosuccinate (AOT) as dopant. The immersion of PAni-coated FBG in different pH solutions could produce different Bragg wavelength shift (∼1557 nm) in the optical spectrum analyzer (OSA). Fourier transformed infrared (FTIR) spectroscopy, ultraviolet–visible (UV–vis) spectroscopy and conductivity measurements were carried out to investigate the chemical interaction between protonated nitrogen atom of PAni backbone and pH analytes. The sensitivity of PAni-coated FBG was adjusted by changing the ratio of Ani:APS:AOT during the polymerization reaction. PAni-coated FBG with molar ratio of Ani:APS:AOT = 5:5:5 achieved the highest sensitivity with response time of 10 s. Besides, the PAni-coated FBG also showed good recyclability up to 10 times.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Conducting polymers and applications · Analytical Chemistry and Sensors · Polydiacetylene-based materials and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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