Bismuth/Porous Graphene Heterostructures for Ultrasensitive Detection of Cd (II)
1
School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2
Institute of Applied Physics, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan
3
School of Environmental Science and Engineering, Kochi University of Technology, 185 Miyanokuchi, Tosayamada, Kami City, Kochi 782-8502, Japan
4
The Center of New Energy Materials and Technology, School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(22), 5102; https://doi.org/10.3390/ma13225102
Received: 30 September 2020 / Revised: 31 October 2020 / Accepted: 9 November 2020 / Published: 12 November 2020
(This article belongs to the Special Issue Design and Applications of Nanoporous Materials)
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 ([email protected]) 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 [email protected] 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 [email protected] electrode showed tremendous potential in composite detection of multifold heavy metals (such as Pb2+ and Cd2+) and wider linear range.
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Keywords:
porous materials; graphene; bismuth; electrochemical deposition; square wave anodic stripping voltammetry
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MDPI and ACS Style
Huang, L.; Ito, Y.; Fujita, T.; Ge, X.; Zhang, L.; Zeng, H. Bismuth/Porous Graphene Heterostructures for Ultrasensitive Detection of Cd (II). Materials 2020, 13, 5102. https://doi.org/10.3390/ma13225102
AMA Style
Huang L, Ito Y, Fujita T, Ge X, Zhang L, Zeng H. Bismuth/Porous Graphene Heterostructures for Ultrasensitive Detection of Cd (II). Materials. 2020; 13(22):5102. https://doi.org/10.3390/ma13225102
Chicago/Turabian StyleHuang, Luyi; Ito, Yoshikazu; Fujita, Takeshi; Ge, Xingbo; Zhang, Ling; Zeng, Heping. 2020. "Bismuth/Porous Graphene Heterostructures for Ultrasensitive Detection of Cd (II)" Materials 13, no. 22: 5102. https://doi.org/10.3390/ma13225102
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