Abstract
The release of hazardous NH3 toxic gas poses a significant threat to both the environment and human health, necessitating the development of materials capable of detecting NH3. This research focuses on the design of a fluorescent gel derived from the peeling-off reaction of Artemisia sphaerocephala Krasch. gum (ASKG). The variations in fluorescence intensity were examined for gels produced under different conditions of pH and adsorption capacity of NH3. The fluorescence response mechanism concerning NH3 and pH value was investigated through analysis of fluorescent lifetime, FT-IR, X-ray XPS, and GPC. Dextran was employed to validate this mechanism. The ASKG gel exhibited a rapid response to NH3 gas, and the fluorescence intensity demonstrated a linear correlation with the cumulative adsorption of NH3 gas. Pseudo-first-order kinetics was applied to analyze the adsorption system of the ASKG gel, revealing a maximum adsorption capacity of 0.03476 g/g for NH3. The practical application of the ASKG gel was demonstrated through a fish spoilage experiment.
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