Green silver-nanoparticle-based dual sensor for toxic Hg(II) ions

Abstract

The present study focuses on the utilization of green silver nanoparticles, as they are preferred for sensing applications due to their environmentally friendly nature. We have examined the optical and electrochemical sensing behavior of silver nanoparticles from Agaricus bisporus (AgNP-AB) towards Hg(II) ions. The AgNP-AB was prepared by microwave reactor. The synthesized AgNP was used for the sensing of Hg(II) ions without the use of modifiers or further sophisticated instrumentation. The synthesized nanoparticles were successfully characterized by different techniques. AgNP-AB leads to aggregation with the addition of Hg(II) ions in aqueous medium, and develops a color change from brown to black which leads to the formation of AgNP-AB-Hg(II) complex. Moreover, the metal sensing ability of AgNP has been explored using electrochemical studies. AgNP-AB modified platinum electrode (AgNP-AB/PE) was developed for the fast sensing of toxic Hg(II) ions. The sensor exhibits a good limit of detection at 2.1 × 10 M. The sensitivity of AgNP-AB/PE towards Hg(II) ions was analyzed with various metal ions. The sensing skill of the developed system was successfully checked with real water samples from Vembanade Lake, Kumarakom, Kerala. AgNP from A. bisporus is highly versatile and promising for different environmental applications.

Green synthesized silver NPs: fluorescence sensor for Cl− ions in aqueous solution in biological pH and cell viability study

“…As there is hydrogen bonding between the Cl − ions with the hydroxyl groups of the capping agent, there is effective aggregation induced cluster formation which is indeed the probable cause of fluorescence enhancement. Similar aggregation induced fluorescence enhancement (and generation) is evident in the cases of metal mediated aggregation induced fluorescence generation of silver nanoparticles [43][44][45][46]. For better understanding of the aggregation phenomena some other TEM images of Ag-CS NPs (after treating with chloride ions) are added to the Supplementary Information (Figure S2).…”

“…A few fluorescence based nanosensors have been reported till date. Recently, green synthesized Ag nanoparticles based fluorescence sensors for various metals are being reported in the literature [43][44][45][46].…”

Recent Trends in Noble Metal Nanoparticles for Colorimetric Chemical Sensing and Micro-Electronic Packaging Applications

“…Recently the Hg 2+ ions, produced by the reaction of tetrachlorinated uric acid in the presence of golden nanoclusters acting as a catalyst, were colorimetrically detected in another study by Zhou et al The detection limit of Hg 2+ was 10 nM, far lower than the allowed level in USA [75]. Silver NPs are also frequently used as optical sensor materials [76][77][78]. For instance, for Farhadi et al [76], the newly synthesized silver nanostructure with plant extract was used for detecting Hg 2+ ions.…”

“…In comparison with other metals with a detection limit of 2.20 × 10 −6 M, however, the findings are optimum for Hg 2+ Ions. Sebastian et al [77] studied the sensing property of stabilized Ag NPs of Agaricus bisporus in a further study These noble metal NPs were also used to detect possible hazards in addition to detecting drinking water toxic ions [78]. For example, uranium (UO 2 2+ ), the calorimetric sensors that have excellent radioactive uranium selectivity, can be detected with gold NPs.…”

Metal Nanoparticles Formation from Nickel Hydroxide

“…Nanomaterials with different morphologies (particles, films, and tubes) are of great research interest for various applications in areas such as microelectronics, medicine, catalysis, energy, etc. [ 4 , 5 , 6 ].…”