Graphite‐Composite Electrodes Bulk‐Modified with (BiO)2CO3 and Bi2O3 Plates‐Like Nanostructures for Trace Metal Determination by Anodic Stripping Voltammetry. Issue 3 (29th January 2013)

• Record Type: Journal Article
• Authors: Marinho, Juliane Z.; Silva, Rodrigo A. B.; Barbosa, Tatielli G. G.; Richter, Eduardo M.; Muñoz, Rodrigo A. A.; Lima, Renata C.
• Is Part Of: Electroanalysis. Volume 25:Issue 3(2013:Mar.)
• Page Start: 765
• Page End: 770
• Publication Date: 2013-01-29
• Subjects: Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201200592
• Languages: English
• ISSNs: 1040-0397

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>We describe the preparation of bismutite ((BiO)₂CO₃) and bismuth‐oxide (Bi₂O₃) plates‐like nanostructures and their incorporation within graphite‐composite electrodes for the determination of trace metals by anodic‐stripping‐voltammetry. The bismuth nanostructures were produced under microwave‐hydrothermal conditions followed by thermal conversion of as‐prepared precursor and characterized by X‐ray diffraction, Fourier‐transformed infrared and field‐emission scanning‐electron‐microscopy. Graphite‐composite electrodes bulk‐modified with Bi₂O₃ nanostructures provided higher sensitivity and lower detection limits for determinations of cadmium, lead and zinc (0.26; 0.52; and 2.23 µg L⁻¹, respectively) employing short deposition time (60 s). The results indicate that the modification of graphite‐composite electrodes with Bi₂O₃ nanostructures improved analytical characteristics of electrochemical sensors for trace‐metal determinations.</p> </abstract>