Article
Chemistry, Analytical
Yijing Ai, Lisi Wang, Wanting Fu, Xiang Ye, Juan Zhou, Xiaoping Zhang, Shuhai He, Wei Sun
Summary: In this paper, a graphdiyne (GDY)-modified glassy carbon electrode was prepared and used for the sensitive and simultaneous detection of Zn2+, Cd2+ and Hg2+ heavy metal ions. The GDY-modified electrode provided a larger surface area and more active sites for the absorption of metal ions. By codeposition with Bi3+, the heavy metal ions were pre-concentrated on the GDY-modified electrode surface, resulting in high sensitivity and selectivity during stripping analysis. The detection ranges and limits for Zn2+, Cd2+ and Hg2+ were determined using differential pulse anodic stripping voltammetry.
Article
Chemistry, Analytical
Shi-Hua Chen, Zong-Yin Song, Xiang-Yu Xiao, Hong-Qi Huang, Yuan-Fan Yang, Pei-Hua Li, Meng Yang, Xing-Jiu Huang
Summary: Vacancy and doping engineering were used to improve the electrocatalytic ability of nanomaterials for detecting heavy metal ions. The P-doped material showed enhanced sensitivity and selectivity towards As(III), and the vacancies provided abundant electrons to form active centers.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Azar Yousefi, Hossein Aghaie, Masoud Giahi, Laleh Maleknia
Summary: This paper investigates the electrochemical behavior of Cd2+ and Pb2+ sensing using polyindole (PIN)/Mn2O3 nanocomposite and PIN/Mn2O3/polyaniline (PANI) nanofibers modified on a glassy carbon electrode. The study varied the amount of (PIN)/Mn2O3 nanocomposite to find the best performance. The results show that the PIN/Mn2O3/PANI nanofibers modified electrode exhibits good linear relationships for Cd2+ and Pb2+ in the concentration range of 0.05-450 mu g L-1, with detection limits of 0.05 and 0.02 mu g L-1, respectively.
Article
Electrochemistry
Luz E. Rebolledo-Perales, Giaan A. Alvarez Romero, Israel Ibarra, Carlos Andres Galan-Vidal, Juan Francisco Flores-Aguilar, I Perez-Silva
Summary: A highly selective sensor based on carbon paste electrodes (CPE) and ion-imprinted polymers (IIP) was proposed for the analysis of lead (II) in real water samples. By optimizing the analysis parameters, a linear concentration range and low detection limit were achieved. The method allows accurate quantification of lead (II) in complex samples without pre-treatment.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Qiuyu Yang, Xiuli Sun, Yichao Sun, Xiaofang Shen, Yuehong Pang
Summary: An electrochemical sensor, Bi-BDC-NH2@NMCS, was developed by combining an amino-functionalized bismuth metal-organic framework (Bi-BDC-NH2) with nitrogen-doped mesoporous carbon nanosphere (NMCS), enabling simultaneous determination of Pb(II) and Cd(II). The Bi-BDC-NH2@NMCS electrode exhibited improved charge transfer, stability, and conductivity compared to the traditional bismuth film electrode. The method demonstrated excellent stripping performance with low detection limits and a wide linear range, and was successfully applied to the detection of Pb(II) and Cd(II) in liver, fish, and shrimp samples with high recoveries.
ACS APPLIED NANO MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Chihyun Kim, Joohyung Park, Woochang Kim, Wonseok Lee, Sungsoo Na, Jinsung Park
Summary: In this study, an amyloid oligomer-reduced graphene oxide composite (AOrGOC) electrochemical sensor was developed for effective heavy metal ion detection. The AOrGOC sensor exhibited low detection limits for Cd2+ and Pb2+ and selectively detected these two heavy metal ions. The sensor also detected Cd2+ and Pb2+ in human plasma.
BIOELECTROCHEMISTRY
(2022)
Article
Chemistry, Analytical
Ying Li, Huan Huang, Rongli Cui, Dongmei Wang, Zi Yin, Dan Wang, Lirong Zheng, Jing Zhang, Yidong Zhao, Hui Yuan, Jinquan Dong, Xihong Guo, Baoyun Sun
Summary: Graphdiyne, a new carbon allotrope, showed efficient electrochemical sensor capability for detecting low concentrations of Cd2+ and Pb2+ in water. The study verified that acetylenic links in graphdiyne served as adsorbent sites for heavy metal ions, enhancing the sensor performance. This platform offers a promising direction for developing novel electrochemical sensors with high performance.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Minwoo Kim, Joohyung Park, Hyunjun Park, Wonjun Jo, Wonseok Lee, Jinsung Park
Summary: In this study, Nafion-blanketed bismuth nanoplates were developed for the ultrasensitive detection of heavy metals in water. The Nafion-blanketing method selectively adsorbs cadmium and lead ions. The ecofriendly bismuth nanoplates were synthesized using ultrasonic energy and used as electrochemical sensors due to their high affinity toward heavy metal ions. The Nafion-blanketed bismuth nanoplates exhibited outstanding sensing performance in real samples such as tap water and effluent, with detection limits of 0.376 nM for Cd2+ and 0.178 nM for Pb2+.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Analytical
Xin Cai, Rui-Ze Xia, Jia-Jia Ye, Cong-Cong Huang, Yuan-Fan Yang, Long-Ke Zhang, Bo Liang, Meng Yang, Chu-Hong Lin, Pei-Hua Li, Xing-Jiu Huang
Summary: A practical strategy for detecting trace-level As(III) in natural water without any modifiers using soluble Fe3+ as a trigger is reported. The method achieves an actual detection limit of 1 ppb and a sensitivity of 0.296 mu A ppb(-1) with excellent stability. The codeposition mechanism of Fe3+ preferentially depositing as Fe-0 is confirmed, which facilitates the adsorption of As(III) and H+ on the electrode surface and the formation of AsH3.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Aymara da Silva Santos, Carolina Zeni Pires Mecca, Tiago Luiz Ferreira, Fabio Ruiz Simoes, Lucia Codognoto, Eliana Maira Agostini Valle
Summary: The interaction between the pesticide carbendazim and the metal ion Pb2+ was studied using electrochemical techniques. The presence of Pb2+ affected the electrochemical signal of carbendazim, indicating complex formation. The electroanalytical method was found to be feasible for the analysis of carbendazim in the presence of Pb2+.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Ji-Hoon Han, Jinkyeong Kim, Joon-Hyung Jin, Joon Hyub Kim
Summary: This paper presents the development of a heavy metal sensor based on a paper channel for point-of-care detection. The sensor uses a three-electrode system fabricated on PET by screen printing. The sensor showed high sensitivity and a wide cadmium detection range, making it suitable for various heavy metal detection applications.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Hai D. Tran, Uyen P. N. Tran, Dinh Quan Nguyen
Summary: This study presents a method for the detection of Cd2+ and Pb2+ using a MWCNTs paste electrode and a mixture of ionic liquid. The feasibility and accuracy of the electrode were validated through experiments.
JOURNAL OF SAUDI CHEMICAL SOCIETY
(2023)
Review
Electrochemistry
Rubin Gulaboski, Ivan Bogeski
Summary: This article introduces the significance of polarography and its derivative technique, pulse voltammetry, which has been developed for a century. It emphasizes the importance of pulse voltammetry as a simple and viable alternative method for mechanistic studies, analytical applications, and kinetic and thermodynamic evaluations. Furthermore, it highlights the contributions made by several women electrochemists in the theoretical and practical application of pulse voltammetric techniques.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Electrochemistry
Mirko Magni, Davide Sironi, Michele Ferri, Stefano Trasatti, Sebastiano Campisi, Antonella Gervasini, Maddalena Papacchini, Pierangela Cristiani
Summary: The study combines the excellent adsorption capacity of nanostructured hydroxyapatite (Hap) in heavy metal cations with the good electrical conductivity of high-surface carbon materials to fabricate high-content hydroxyapatite electrodes (Hap 84-96 wt.%). The electrodes demonstrate the synergistic capability of detection and adsorption of heavy metal cations in water solutions. A mesoporous carbon derived from bio-waste is used as a scaffold for depositing Hap by co-precipitation. The composite with 92 wt.% Hap shows superior sensitivity compared to low-content Hap electrodes reported in literature.
Article
Engineering, Environmental
Fengqian Xie, Feng Tang, Xinli Li, Xiaoran Wu, Shujun Wang, Hongqiang Xie, Ping Wang, Yueyun Li, Qing Liu
Summary: In this study, a strategy of co-movement catalysis based on photo-assisted electrochemical catalysis was proposed to construct a flexible electrochemical sensor for simultaneous detection of multiple heavy metal ions (HMIs). The sensor exhibited sensitive detection performance and showed potential in environmental monitoring.
JOURNAL OF HAZARDOUS MATERIALS
(2023)