An efficient colorimetric inspection of ammonia using silver nanoparticles synthesized by 3‐(1‐(2‐(2,4‐dinitrophenyl)hydrazono)ethyl)‐1H‐indole as chemo‐sensors in water environment

Abstract

We synthesized 3-(1-(2-(2,4-dinitrophenyl)hydrazono)ethyl)-1H-indole by condensed of 3-acetylindole with 2,4-dinitrophenylhydrazine used as chemo sensor for ammonia. Silver nanoparticles were prepared using a straightforward strategy technique of chemical reduction process by hydrazine derivative (HD) at room temperature. HD has been utilized as a reducing and stabilizer; that is, no other capping agent needed to guide the anisotropic formation of Ag-NPs. UV/Vis spectroscopy was used to evaluate the formation of silver nanoparticles where the maximum LSPR was recorded at 440 nm at various stirring time. It is noticed that the amplitude of UV/vis band increased with increasing stirring reaction time. Chemically prepared AgNPs employed in colorimetric tests to track ammonia in solution that is dependent on color shift of a chemochromic agent embedded in a porous matrix. Ammonia influences the characteristics of the nanoparticles synthesized in a concentration-dependent condition as established by localized surface plasmon resonance. The designed novel detectors are efficient at room temperature, showing quick rebuttal times in a broad array of sensing rates.

Formation of plasmonic core/shell nanorods through ammonia-mediated dissolution of silver(i)oxide for ammonia monitoring

“…However, these methods have some limitations, such as slow processing times, high operating temperatures, and specialized expensive equipment requirements. 1 Among these methods, spectroscopic strategies are simpler and cheaper, especially when plasmonic nanoparticles are part of the sensor.…”

“…The detection limit of ammonia in the present study is lower than the reported methods. 1,[31][32][33][34][36][37][38][39] Most reports do not provide visual detection 1,[30][31][32][33][34]36,39 or clear color differentiation. 35,38 In the present study, the color changes of the sensor in the absence and presence of different ammonia concentrations are completely different and can be easily detected by the naked eye.…”

“…Exposure to this substance poses serious health risks and is harmful to humans and animals, especially aquatic life. 1 Aquaculture involves the cultivation of aquatic organisms under controlled or semi-controlled conditions. 2 To ensure sustainable aquaculture, it is essential to maintain the quality of the water and inputs, promote fish health, select pollution-free sites, and strictly control water quality parameters.…”