International Journal of Electrochemical Science
·
2023
·
IF 1.5
Mao-Ting Ding,Xian-Zhang Ling,F.F. Lin,L. Pei,C.G. Fan
A facile hydrothermal process was used for the synthesis of barium bismuthate nanoribbons. The nanoribbons were applied as the sensing materials for sensitive detection of Pb(II). The micromorphology and structure of the prepared products were analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The suspension with barium bismuthate nanoribbons was cast on the surface of a glassy carbon electrode (GCE). The barium bismuthate nanoribbons modified GCE was used for the detection of Pb(II) using square wave anodic stripping voltammetry (SWASV) technique. The results show that the fabricated GCE exhibited a linear range of 0.001-2 mM with the limit of detection (LOD) of 0.13 μM. The barium bismuthate nanoribbons modified GCE has a promising potential in practical application for the detection of real samples with water and soil.
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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DOI
高影响因子
MICROCHIMICA ACTA
·
2012
·Vol. 179
·期 1
·171-177
·
IF 3.033
Yi Wen Jiao,Li Yang,Ran Gu,Luo Hong Qun,Li Nian Bing
We have developed a sensor for the square wave anodic stripping voltammetric determination of Pb(II). A glassy carbon electrode was modified with a thin film of an antimony/poly(p-aminobenzene sulfonic acid) composite in air-saturated aqueous solution of pH 2.0. Compared to a conventional antimony film electrode, the new one yields a larger stripping signal for Pb(II). The conditions of polymerization, the concentration of Sb(III), the pH value of the sample solution, the deposition potential and time, frequency, potential amplitude, and step increment potential were optimized. Under the optimum conditions, a linear response was observed for Pb(II) in the range of 0.5 to 150.0 μg L −1 . The detection limit for Pb(II) is 0.1 μg L −1 .
The surface of a glassy carbon electrode (GCE) was modified by electropolymerization of p-aminobenzene sulfonic acid (p-ABSA) and the modified electrode was then prepared by in situ depositing antimony and target metal on the poly(p-ABSA) coated glassy carbon electrode. The antimony/poly(p-ABSA) film electrode displays high electrochemical activity in giving a peak current that is proportional to the concentration of Pb(II) in a certain range.
研究领域:
生物医学工程
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环境监测
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分析化学
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电化学传感
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重金属检测
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Shiqi Wang,Jinrui Li,Yanqiu Fu,Zhongxin Zhuang,Zhonggang Liu
As a global toxic pollutant, lead (Pb(II)) causes serious risks for living organism and the environment, it is thus of critical importance to explore a facile and efficient sensing protocol for the detection of Pb(II). Herein, we proposed the flower-like In-doped Bi 2 S 3 (IDB) with mesoporous nanostructure as an electrochemical sensing interface for the Pb(II) detection, which was synthesized via a facile solvothermal method. The fabricated IDB/GCE exhibited a high sensitivity of 78.1 μA·μM −1 and a satisfied detection limit (LOD) as 0.017 μΜ with robust stability and remarkable anti-interference capability. Plausible mechanism of electrochemical sensing of Pb(II) was proposed based on electrochemical and characterization results, where the mesoporous IDB could provide numerous electrocatalytic active sites, and efficiently accumulate target Pb(II) onto the electrode surface, leading to the improved electrochemical performance. Besides, the complex state of Pb(II) was analyzed with IDB/GCE, and a tentative reference on the detection of complex state of Pb(II) was achieved with the favorable results. Furthermore, the fabricated IDB/GCE could be applied for the analysis of Pb(II) in real water sample with high reliability.
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 12
·1-8
·
IF 5.479
Niu Yanyan,Luo Guiling,Xie Hui,Zhuang Yujiao,Wu Xianqun,Li Guangjiu,Sun Wei
A photoelectrochemical (PEC) aptasensor for Pb(II) detection is described. A nanocomposite consisting of CdS (2.5 μm) and TiO 2 nanoparticles (10 nm) was used as a photoactive material, and gold nanochains (Au NCs) as the support for immobilization of the Pb(II)-binding aptamer. The quercetin-copper(II) complex was further employed as the intercalator for the improvement of the photoactivity by embedding it into dsDNA. In the presence of Pb(II), a Pb(II)-stabilized G-quadruplex was formed between Pb(II) and DNA S1. This is accompanied by unwinding of the dsDNA and the release of the quercetin-copper(II) complex from the surface of the sensor. This results in a decrease of the photocurrent that drops linearly from 5.0 × 10 −12 to 1.0 × 10 −8 mol·L −1 Pb(II) concentration range with a detection limit of 1.6 × 10 −12 mol·L −1 . The method was applied to the determination of Pb(II) in various samples and gave satisfactory results.
A photoelectrochemical aptasensor was fabricated for the detection of Pb(II) based on CdS-TiO 2 nanocomposite modified indium tin oxide (ITO) electrode. Gold nanochains (AuNCs) were used as anchor to immobilize the aptamers S1 and S2 that form a double helix structure by DNA hybridization. After embedding of quercetin-copper(II) complex as intercalator and electron donor, the concentrations of Pb(II) were determined by the changes of photocurrents.
研究领域:
分析化学
·
纳米技术
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2013
·
IF 5.437
Yan Li,Yang Si,Xueqin Wang,Bin Ding,Gang Sun,Gang Zheng,Wenjing Luo,Jianyong Yu
A facile, ultrasensitive, reproductive and selective sensor strip utilizing electrospun polyamide-6/nitrocellulose (PA-6/NC) nano-fibers/nets (NFN) membranes assemble bovine serum albumin decorated Au nanoparticles (BAu probe) for naked-eye colorimetric assay of Pb 2+ has successfully prepared through dual-component alternate distribution multifluidic electrospinning technique . Benefiting from the extremely large specific surface areas and high porosity of NFN membranes, the stability of BAu probe dramatically increased and the strips presented a significant absorbance decreasing band at 546 nm which induce the visual color changes from deep pink to white after incubated in Pb 2+ liquor with a low detection limit of 0.2 μM without any assistance of equipment. Upon exposure to a series of metal ions , only Pb 2+ could induce a pink-to-white color change, which clearly exhibited that BAu probe immobilized PA-6/NC membranes could act as highly selective strips to detect Pb 2+ with little interference from other metal ions. Additionally, the colorimetric responses are represented in visualized quantitative by calculated color difference from L ⁎ a ⁎ b ⁎ coordinates which are presented with lightness and chrome values. Furthermore, the sensitivity of NFN membrane-based strips is much higher than that of film-based ones. The results indicate that this promising cost-effective sensing system could potentially allow for assaying of Pb 2+ in human urine or blood as preliminary screening of lead poisoning.
研究领域:
分析化学
·
环境科学
·
材料科学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）