Abstract
Toxic organic pollutants have a severe impact on the environment as well as the living organisms around the world. Surface-enhanced Raman spectroscopy (SERS) is considered to be one of the advanced sensing methods for the ultrasensitive detection of organic pollutants. Herein, a novel octahedral Ag2SO3 microcrystal was synthesized using the silver-ammonia complex precipitation method for the detection of herbicide (4-chlorophenol) and synthetic dyes (sunset yellow and methylene blue dye). Ag2SO3 microcrystal exhibits superior sensitivity with an enhancement factor (EF) in the order of ~108. The large surface area with a rough octahedral morphology of Ag2SO3 favors the formation of abundant hotspots. The as-prepared Ag2SO3 also possesses excellent recyclability property via light irradiation attributed to the chemical enhancement mechanism. The capability of Ag2SO3 for the detection of 4-CP against interference in river water and honey was also investigated. It is assumed from the results that Ag2SO3 microcrystal is a promising substrate for reusable SERS applications.
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