Fabrication of High-Performance Colorimetric Fiber-Type Sensors for Hydrogen Sulfide Detection

초록

Hydrogen sulfide(H<inf>2</inf>S) gas is a high-risk gas that can cause suffocation or death in severe cases, depending on the concentration of exposure. Various studies to detect this gas are still in progress. In this study, we demonstrate a colorimetric sensor that can detect H<inf>2</inf>S gas using its direct color change. The proposed nanofiber sensor containing a dye material named Lead(II) acetate, which changes its color according to H<inf>2</inf>S gas reaction, is fabricated by electrospinning. The performance of this sensor is evaluated by measuring RGB changes, ΔE value, and gas selectivity. It has a ΔE value of 5.75 × 10-3 ΔE/s•ppm, showing improved sensitivity up to 1.4 times that of the existing H<inf>2</inf>S color change detection sensor, which is a result of the large surface area of the nanofibers. The selectivity for H<inf>2</inf>S gas is confirmed to be an excellent value of almost 70%. © 2022, Korean Sensors Society. All rights reserved.

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