Nanoparticle-based with surface plasmon resonance capability colorimetric sensors developed for the detection of some heavy metal ions using UV-Visible Spectrophotometer

Authors : Batuhan YARDIMCI

Pages : 64-75

View : 20 | Download : 13

Publication Date : 2021-01-29

Article Type : Review Paper

Abstract :Especially, heavy metals such as Cd2+, Hg2+, Pb2+ and Cr3+ cause toxic effects even when taken in trace amounts. These heavy metals are inorganic pollutants and since they are not biodegradable like some organic pollutants, their amounts in nature gradually increase over the years and this situation significantly affects the health of living things. Heavy metal intake causes diseases such as memory loss, loss of appetite, neurological damage, skin diseases. In recent years, gold and silver nanoparticle based colorimetric sensors with surface plasmon resonance properties have been developed for qualitative and quantitative analysis specific to target heavy metal ions. The working principle of these types of nanosensors is caused by aggregation or disaggregation of the relevant nanoparticle in the presence of heavy metal ions, which causes color change in the UV-visible region and this color change is monitored by UV-Visible Spektrophotometer. UV-Vis. spectrophotometers are portable, fast, sensitive, selective and inexpensive devices and allow the development of colorimetric sensors. In this review, gold or silver nanoparticle based colorimetric sensors that enable the characterization of Cd2+, Hg2+, Pb2+ and Cr3+ heavy metal ions with UV-Visible spectrophotometer are included.
Keywords : Heavy metals, gold nanoparticle AuNP, silver nanoparticle AgNP, UV Vis spectrophotometer, colorimetric sensor