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RISS 인기검색어
- 검색키워드
- 저자 : Mehta Navjot (검색결과 1 건)
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Bhanjana, Gaurav,Mehta, Navjot,Chaudhary, Ganga Ram,Dilbaghi, Neeraj,Kim, Ki-Hyun,Kumar, Sandeep Elsevier 2018 Journal of molecular liquids Vol.264 No.-
<P><B>Abstract</B></P> <P>Electrochemical sensors have attained enormous attention in last few years. Various contaminants like pesticides, explosives, pharmaceutical drugs, and biological fluids have been determined qualitatively as well as quantitatively with the assistance of cyclic voltammetry (CV), linear sweep voltammetry (LSV), amperometry, and impedance-based techniques. Nanoengineering based modified electrodes have contributed to the establishment of the on-site detection platform for various harmful analytes with the aid of electrochemical method. In this research, CV-based detection method has been developed and validated against arsenic (As<SUP>3+</SUP>) in real as well as laboratory samples. Lead pencil (<I>cost around 0.015 USD</I>) has been utilized as working electrode after modification with tin oxide (SnO<SUB>2</SUB>) nanoneedles. SnO<SUB>2</SUB> nanoneedles (size: 60–80 nm), synthesized using chemical precipitation method, were characterized for their elemental, topological, morphological and structural features. The surface of lead pencil (containing graphite/carbon (C)) was then coated with these nanoneedles with the help of nafion (as binding agent). This fabricated sensor recorded a detection limit of 10 ppb (linear range: 50–500 ppb) with ultrasensitivity of 28.13 μA cm<SUP>−2</SUP> ppb<SUP>−1</SUP>. This method was then applied to the direct ion quantitation of arsenic in real environmental and industrial samples collected from diverse locations.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Low temperature synthesis of SnO<SUB>2</SUB> nanoneedles </LI> <LI> In-depth characterization using TEM, SEM, FTIR and XRD analyses </LI> <LI> Fabrication of SnO<SUB>2</SUB>/Nafion/C pencil electrode </LI> <LI> Detection of As<SUP>3+</SUP> in real waste-water samples using fabricated electrode </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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