International Journal of Electrochemical Science
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2023
·
IF 1.5
Fengping Liu,Wei Huang,Zhenfa Zhang,Cuizhong Zhang,Qing Huang,Gang Xiang,Meiyan Liang,Jinyun Peng
In this work, a novel electrochemical sensor based on sulfur and nitrogen co-doped porous graphene (SNPG) is developed for the simultaneous detection of Cd 2+ and Pb 2+ by in situ plating bismuth film. The large effective surface area and doped sulfur and nitrogen in porous graphene supply active sites with high affinity toward Cd 2+ and Pb 2+ by electrostatic interaction to improve the sensor performance, and the bismuth film improves the stripping voltammetric performance by forming bismuth-metal (Cd, Pb) alloys. Under optimized conditions, this sensor exhibits linearity in the range of 0.05-2 μM for Cd 2+ and Pb 2+ with a low detection limit of 0.02 μM for Cd 2+ and 0.008 μM for Pb 2+ . Moreover, the proposed sensor was applied for the simultaneous detection of Cd 2+ and Pb 2+ in tap water with satisfactory results, suggesting that SNPG is a promising electrode material for detecting heavy metal ions.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Hui Li,Jie Zhao,Shifan Zhao,Guofeng Cui
Developing a reliable, sensitive and portable electrochemical sensor for precise determination of trace heavy metal ions in water is an attractive challenge. In this work, an integrated three-electrode sensor based on screen–printed gold working electrode (SPAuE) ex-situ electroplated bismuth film was developed via a facile and simple process for the determination of trace Pb(II), Cd(II), and Zn(II) by square wave anodic stripping voltammetry (SWASV). The bismuth film was deposited on SPAuE at a potential of −0.08 V (Bi/SPAuE −0.08V ). The results exhibited the sensor with a wide linear range (from 1 to 120 μg L -1 ) for the simultaneous detection of these three heavy metal ions. Besides, the detection limits of Pb(II), Cd(II), and Zn(II) for the sensor were respectively found to be 0.04 μg L −1 , 0.02 μg L −1 , and 0.05 μg L −1 (S/N = 3). The proposed sensor revealed good anti-interference ability, satisfactory repeatability with RSDs of less than 2.5% (n = 12), excellent reproducibility with RSDs of less than 2.5% (n = 6), and considerable stability. The detection accuracy of the Bi/SPAuE −0.08V based sensor was further evaluated via atomic absorption spectroscopy (AAS). Due to its simplicity in process, high detection performance and excellent reliability, such sensors are expected to find utility in portable heavy metal detection applications.
研究领域:
分析化学
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环境科学
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产品关联
DOI
高影响因子
Electrocatalysis
·
2022
·Vol. 14
·期 1
·78-87
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IF 2.933
Gu Ying-ying,Xiang Ding-tao,Cai Ke,Wang Yuan-hao,Mei Yong,Han Jun,Pan Hongzhi
The rapid determination of Cr(VI) in workplace air can provide technical support for daily monitoring of occupational hazard factors in enterprises. In this paper, a bismuth film/carboxylated multi-walled carbon nanotube modified glassy carbon electrode (Bi/CMWCNTs/GCE) electrochemical sensor had been used to establish a new method for detection of Cr(VI) in workplace air. Carboxylated multicycle carbon nanotubes (CMWCNTs) were modified onto glassy carbon electrode (GCE), and bismuth (Bi) film was precoated on the modified electrode by electrodeposition. The morphology and electrochemical properties of Bi/CMWCNTs modified electrodes were characterized by scanning electron microscopy (SEM) and cyclic voltammetry (CV), respectively. The results showed that the formation of stable bismuth films and sensor’s high sensitivity were due to CMWCNTs. The differential pulse stripping voltammetry (DPSV) response of Cr(VI) at Bi/CMWCNTs modified electrode outcomes with a low detection limit of 0.18 μg/L and wider linear 0.50 ~ 25.0 μg/L. In comparison to standard spectrophotometry, the newly designed electrochemical sensor had exhibited more sensitive, convenient, and environmentally friendly, which was satisfactory in analytical application to real air samples. Therefore, the Bi/CMWCNTs/GCE electrochemical sensor has the potential applications in the rapid detection of Cr(VI) in workplace air. Graphical abstract
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2015
·Vol. 162
·期 4
·H194
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IF 3.266
Yongxin Tao,Xiaogang Gu,Yan Pan,Linhong Deng,Yong Wei,Yong Kong,Wei Li
Thiolated poly(m-phenylenediamine) (PmPD), overoxidized in NaOH solution, was used in combination with in situ plated Bi film electrode for simultaneous and sensitive analysis of Cd2+ and Pb2+ by square wave anodic stripping voltammetry (SWASV). Thiolation of PmPD was achieved during the electropolymerization of m-phenylenediamine, and the introduced S atoms improved the preconcentration efficiency of the PmPD for Cd2+ and Pb2+; and overoxidation altered the surface structure of the polymer, which endowed more active area for the nucleation of Bi. Due to the synergetic effect of thiolation, overoxidation and Bi film, the prepared PmPD modified Bi film exhibited excellent performances in the simultaneous analysis of Cd2+ and Pb2+, showing a linear range from 6 to 240 μg L−1 for Cd2+ and Pb2+. The detection limits were 0.02 μg L−1 for Cd2+ and 0.04 μg L−1 for Pb2+, respectively. This approach opens a new avenue to monitor trace heavy metal ions precisely and rapidly.
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
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IF 1.5
Weiqiang Meng,Peng Liu,Pingru Cai,Tingting Hao,Shaohua Ma,Yufang Hu,Sui Wang,Yangbo Wu,Zhiyong Guo
This work reported an approach for the determination of the heavy metal ion cadmium Cd(II) using a bismuth-film electrode (Bi-FE) with fast-scan anodic stripping voltammetry (FSASV). The experiment was divided into two steps. First, the Bi-FE was prepared by electrodepositing a metallic bismuth-film onto the electrode, and then the target metal ion Cd(II) was electrochemically preconcentrated on the Bi-FE. Second, the target metal was measured with FSASV. At a scan rate of 400 V/s, the anodic stripping peak current increased gradually with increasing Cd(II) concentration, and a linear relationship between the peak current and the logarithm of Cd(II) concentration was obtained from 0.1 μmol/L to 1.0 pmol/L, with a detection limit of 0.3 pmol/L (S/N=3). Furthermore, the method was successfully applied to detect Cd(II) in spiked tap water samples, with sufficient recoveries in the range of 94.0% to 105.2% and corresponding relative standard deviations ranging from 2.9% to 6.4%. Therefore, FSASV is a simple, rapid and ultrasensitive method for the detection of picomolar levels of Cd(II).
研究领域:
分析化学
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环境科学
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DOI
高影响因子
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
·
2019
·Vol. 29
·期 10
·105005
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IF 2.141
Xiangyi Hu,Hui Guo,Tong Qi,Weihua Fan,Chunping Jia,Baojian Xu,Qinghui Jin,Andreas Offenhäusser,Jianlong Zhao
A compact, durable, low-reagent-usage, portable miniaturized electrochemical sensor is successfully developed for the high sensitivity detection of trace lead. We fabricated micropillars array working electrodes on the chip and established ultra-low concentration sodium acetate-acetate (NaAC-HAC) buffers (pH ≈ 4.5) system to enhance the detection sensitivity of the sensor. The ultra-low concentration buffer possesses unique features such as low baseline current and high peak current difference height. The analytical performance of the fabricated electrochemical sensor with 3D gold (Au) working electrodes modified by bismuth-film was comprehensively studied. The microsensor exhibited a high sensitivity of 0.0412 µA ppb−1 and a satisfactory detection limit of 0.15 ppb when detecting lead ions under optimized conditions. Moreover, good linearity (correlation coefficient: 0.9993) with lead ion measurements in the concentration range of 1–120 ppb and excellent repeatability (RSD: 1.79%) was obtained, the chip has satisfactory selectivity for common interference ion. Besides, a low consumption of 350 µl of reagents per test was acquired. Finally, the proposed microsensor was applied to detect trace metal ions in tap and lake samples with satisfactory results.
研究领域:
环境科学
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分析化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 8
·3255-3260
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IF 3.288
Lei Yu,Xin Cui,Xiangguo Yue,Zhenguo Yu
A simple and effective ratiometric electrochemical sensor has been developed for the detection of lead ions. This sensor was based on porous silicon nanoparticles with in situ deposition of a bismuth film. Porous silicon was prepared via electrochemical etching of silicon wafers in solution containing hydrofluoric acid, ethanol and hydrogen peroxide. The porous silicon samples were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. A modified electrode was applied to detect Pb(II) in water samples by differential pulse anodic stripping voltammetry. By using Bi(III) as an internal reference standard, the current ratio of Pb(II) to Bi(III) offers higher stability and reproducibility than the current of Pb(II) itself. The calibration curve in the ratiometric current signal exhibited a linear response from 0.2 to 100 μg L−1, with a limit of detection of 0.09 μg L−1 to Pb(II), enhancing the sensitivity by a factor of 1.9 in comparison with non-ratiometric methods.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
DOI
高影响因子
ELECTROANALYSIS
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2020
·Vol. 33
·期 2
·473-482
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IF 2.544
Xue Chen,Kunchao Lu,Donghai Lin,Yan Li,Shiyu Yin,Zhiyi Zhang,Meihua Tang,Guosong Chen
Hierarchical porous tubular biochar (PTBC) was prepared by selectively removing lignin simply according to reverse the pyrolysis sequence of cellulose. The properties of the PTBC sample were characterized by XRD, SEM, TEM, Raman spectra, cyclic voltammetry and electrochemical impedance spectroscopy. The electrochemical performances of PTBC modified on the screen-printing electrode illustrated excellent detection of lead ions (lead (II)) in water with the linear range (0.5–120 μg/L) and the detection limit (0.02 μg/L) by in-situ bismuth film square wave anode stripping voltammetry.
研究领域:
环境科学
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Lili Xiao,Hongbo Xu,Shenghai Zhou,Ting Song,Huanhuan Wang,Shouzhu Li,Wei Gan,Qunhui Yuan
Recently, metal-organic frameworks (MOFs) and their carbon derivates have been demonstrated as new electrode modifying materials for electrochemical sensing. In this work, the first example of the detection of heavy metal ions with a MOF-derived sensing platform was presented. The platform was based on a glassy carbon electrode (GCE) modified by Nafion-bismuth/nitrogen doped microporous carbon (NMC) composite, in which the NMC was derived from a zeolitic imidazolate framework-8 (ZIF-8). The good dispersibility, large specific surface area (941 m 2 g −1 ), high nitrogen content (25.0 at.%) and good electrical conductivity of the NMC materials, as well as the synergistic effects of Nafion and bismuth-film contributed to the enhanced signals of the electrode during the differential pulse anodic stripping voltammetry (DPASV) measurements for simultaneous detection of trace Cd(II) and Pb(II) in aqueous solution. The calibration curves for Cd(II) covered two linear ranges varying from 2 to 10 μg L −1 and 10 to 100 μg L −1 . As for Pb(II), the linear calibration curves ranged from 0.5 to 10 μg L −1 and 10 to 100 μg L −1 . The detection limits were estimated to be 1.5 μg L −1 (S/N = 3) for Cd(II) and 0.05 μg L −1 (S/N = 3) for Pb(II), which were 2 times and 200 times lower than the guideline values of drinking water given by the World Health Organization (WHO), for Cd(II) and Pb(II), respectively. In addition, the good reproducibility and stability of the modified electrode offered a promising perspective for the detection of trace metal ions in practice. Compared with other porous carbon modified electrodes that obtained by either drop-casting or screen-printing method, the proposed Nafion/Bi/NMC/GCE showed a much lower detection limit for Pb(II) and a lower or comparable detection limit for Cd(II). Moreover, the obtaining of uniformly ordered N-doped carbon polyhedron could shed light on the preparation of other heteroatom-doped electrode modifying materials for the detection of heavy metal ions .
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 12
·4731-4740
·
IF 4.58
Lu Zhiwei,Zhang Junjun,Dai Wanlin,Lin Xueni,Ye Jiaping,Ye Jianshan
The authors report on a disposable sensor for the differential pulse anodic stripping voltammetric (DPASV) determination of the ions Zn(II), Pb(II) and Cu(II). Simultaneous detection is accomplished by using a screen-printed carbon electrode (SPCE) co-modified with an in-situ plated bismuth (Bi)) film and gold nanoparticles (AuNPs). The synergistic effect of the Bi film, and the large surface and good electrical conductivity of the AuNPs strongly assist in the co-deposition of the three ions. Four well-defined and fully separated anodic stripping peaks, at 540 mV for Zn(II), 50 mV for Pb(II), 140 mV for Bi(III) and 295 mV for Cu(II), all vs. Ag/AgCl, can be seen. The modified SPCE was characterized by scanning electron microscopy, X-ray diffraction, cyclic voltammetry and electrochemical impedance spectroscopy. Under the optimized conditions, the sensor has a good response to these ions. The detection limits (at an S/N ratio of 3) are 50 ng·L −1 for Zn(II), 20 ng·L −1 for Pb(II), and 30 ng·L −1 for Cu(II). The method was applied to the determination of the 3 ions in spiked lake water samples.
Schematic of screen-printed carbon electrode (SPCE) co-modified with a bismuth film and gold nanoparticles for electrochemical simultaneous determination of Zn(II), Pb(II) and Cu(II) by differential pulse anodic stripping voltammetric (DPASV).
研究领域:
分析化学
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环境科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2014
·Vol. 7
·期 2
·472-477
·
IF 1.938
Meng Li,Da-Wei Li,Yi-Tao Long
We developed a hybrid method combining an electrochemical technique and fluorescence measurement to detect Cd2+ in water samples. The electrochemical deposition and stripping technique provided a clean and selective pretreatment for transferring and concentrating Cd2+ from original turbid samples to blank buffer, followed by fluorescence quantification. Cd2+ in the original samples was co-deposited with Bi3+, which could provide a fresh bismuth film and concentrate a higher amount of Cd2+ onto a portable screen-printed electrode. The water-soluble compound Fura-2 was introduced as the fluorescent indicator for Cd2+ quantification, with the purpose of eliminating the error caused by the transfer to buffer. The detection results using real samples exhibited an excellent anti-interference ability, and showed a good linear correlation (correlation coefficient of R = 0.993). Moreover, the system was highly sensitive as a detection limit of 1.0 nmol L−1 could be achieved through a repeated electrochemical pretreatment process. This hybrid method is selective, sensitive, convenient and portable. It is promising for in field heavy metal ion determination in remote environments.
研究领域:
分析化学
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环境科学
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电化学
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光谱学
✓ 已验证
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2022
·
IF 3.806
Yao Liu,Chunwen Chang,Qiang Xue,Rong Wang,Lingxia Chen,Zeyu Liu,Lin He
Since lead is teratogenic, carcinogenic and mutagenic, people pay increasing attention to lead contamination in water environment. In this work, a novel electrochemical sensor was developed to detect Pb(II) ion in water by PPy , MOFs and bismuth film (BF) modify GCE . Scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, electrochemical impedance spectroscopy , contact angleanalyses, cyclic voltammetry and differential pulse anodic stripping voltammetry were used to characterize the BF-PPy/UIO-66-NH 2 /GCE surface, revealing the physical and electrochemical properties of the electrode. MOFs increased the specific surface area and adsorption site of the electrode. The PPy enhanced the conductivity of the composites materials. MOFs and PPy synergistically promoted the electrochemical performance of the electrode. The deposition potential, deposition time , solution pH and Bi (III) concentration were optimized to determine the optimal detection condition. The electrode has a wide linear range (0.5 to 10 μg/L) with a low detection limit (0.05 μg/L). This electrode also has good anti-interference, repeatability and stability. Besides, it has been successfully applied to the detection of actual water samples. The recovery rates ranged from 95.4 % to 102.8 % with a relative standard deviation (RSD) less than 4.40 %. Our results provide an insight on efficient and rapid detection of Pb(II) ions in water environment in the future.
研究领域:
环境科学
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分析化学
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电化学
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水质监测
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）