Bismuth/Porous Graphene Heterostructures for Ultrasensitive Detection of Cd (II)

Autor:	Takeshi Fujita, Xingbo Ge, Ling Zhang, Luyi Huang, Heping Zeng, Yoshikazu Ito
Rok vydání:	2020
Předmět:	Materials science Metal ions in aqueous solution Analytical chemistry chemistry.chemical_element 02 engineering and technology Electrochemistry lcsh:Technology 01 natural sciences law.invention Bismuth law bismuth General Materials Science lcsh:Microscopy lcsh:QC120-168.85 Detection limit lcsh:QH201-278.5 lcsh:T Graphene Communication square wave anodic stripping voltammetry graphene 010401 analytical chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Electrochemical gas sensor Anodic stripping voltammetry chemistry lcsh:TA1-2040 Electrode lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 porous materials electrochemical deposition
Zdroj:	Materials Materials, Vol 13, Iss 5102, p 5102 (2020)
ISSN:	1996-1944
Popis:	Heavy metals pollution is one of the key problems of environment protection. Electrochemical methods, particularly anodic stripping voltammetry, have been proven a powerful tool for rapid detection of heavy metal ions. In the present work, a bismuth modified porous graphene (Bi@PG) electrode as an electrochemical sensor was adopted for the detection of heavy metal Cd2+ in an aqueous solution. Combining excellent electronic properties in sensitivity, peak resolution, and high hydrogen over-potential of bi-continuous porous Bi with the large surface-area and high conductivity on PG, the Bi@PG electrode exhibited excellent sensing ability. The square wave anodic stripping voltammetry response showed a perfect liner range of 10−9–10−8 M with a correlation coefficient of 0.9969. The limit of detection (LOD) and the limit of quantitation (LOQ) are calculated to be 0.1 and 0.34 nM with a sensitivity of 19.05 μA·nM−1, which is relatively excellent compared to other carbon-based electrodes. Meanwhile, the Bi@PG electrode showed tremendous potential in composite detection of multifold heavy metals (such as Pb2+ and Cd2+) and wider linear range.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14edd62191e7728e8f509da01e5e04a1 https://doi.org/10.3390/ma13225102 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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