Facile synthesis of oxidized multi-walled carbon nanotubes functionalized with 5-sulfosalicylic acid/MoS2 nanosheets nanocomposites for electrochemical detection of copper ions

Wang, Shaoxia; Li, Jing; Qiu, Yang; Zhuang, Xuming; Wu, Xuezhong; Jiang, Jing

doi:10.1016/j.apsusc.2019.05.161

Cited by 29 publications

(6 citation statements)

References 50 publications

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“…The LOD value was far lower than the prescribed value in drinking water by the World Health Organization (2000 μg·L −1 ) [ 33 ]. The β-CD/CMK-8/GCE also possessed lower LOD and higher sensitivity than those reported in previous literature with regards to Cu 2+ detection (shown in Table 1 ) [ 34 , 35 , 36 , 37 , 38 ].…”

Section: Resultsmentioning

confidence: 66%

β-Cyclodextrin/CMK-8-Based Electrochemical Sensor for Sensitive Detection of Cu2+

Bao

Liu

et al. 2022

Molecules

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In this work, β-cyclodextrin (β-CD)/mesoporous carbon (CMK-8) nanocomposite was synthesized and used as an electrochemical sensing platform for highly sensitive and selective detection of Cu2+. The morphology and structure of β-CD/CMK-8 were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). In addition, the dates from electrochemical impedance spectroscopy (EIS) and Cyclic voltammetry (CV) demonstrated that the β-CD/CMK-8 possessed a fast electronic transfer rate and large effective surface area. Besides this, the β-CD/CMK-8 composite displayed high enrichment ability toward Cu2+. As a result of these impressive features, the β-CD/CMK-8 modified electrode provided a wide linear response ranging from 0.1 ng·L−1 to 1.0 mg·L−1 with a low detection limit of 0.3 ng·L−1. Furthermore, the repeatability, reproducibility and selectivity of β-CD/CMK-8 towards Cu2+ were commendable. The sensor could be used to detect Cu2+ in real samples. All in all, this work proposes a simple and sensitive method for Cu2+ detection, which provides a reference for the subsequent detection of HMIs.

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Section: Resultsmentioning

confidence: 66%

β-Cyclodextrin/CMK-8-Based Electrochemical Sensor for Sensitive Detection of Cu2+

Bao

Liu

et al. 2022

Molecules

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“…Our proposed electrochemical sensor exhibits much better sensing performances than those of the reported electrochemical sensors using MoS 2 or MoS 2 -based nanocomposites as sensing elements. 46,47 Also, this WE was used to detect some other possible interfering metal ions, including Mg 2+ , Pb 2+ , Ca 2+ , Cd 2+ , Fe 3+ , Hg 2+ , Co 2+ , and Ni 2+ to investigate its selectivity for Cu 2+ detection. As shown in Figure S11, the peak current of the WE for Cu 2+ detection is much higher than that of other metal ions at the same concentration.…”

Section: Electrochemical Analysis Performancesmentioning

confidence: 99%

Polyaniline Functionalization of Defective 1T-MoS₂ Nanosheets for Improved Electron and Mass Transfer: Implications for Electrochemical Sensors

Gan

Zhang

Liu

et al. 2023

ACS Appl. Nano Mater.

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Simultaneously improving electron and mass transfer processes is full of challenges for electrode material design. To this end, three-dimensional (3D) porous electrode materials were obtained via covalent combination between defective 1T-MoS 2 nanosheets and polyaniline (PANI) through hydrothermal/ solvothermal processes and surface polymerization reactions. Our experimental results and density functional theory calculations jointly reveal that PANI molecules can not only intercalate into van der Waals (vdW) gaps of 1T-MoS 2 nanosheets but also chemically adsorb onto S-vacancy clusters (via Mo−N covalent bonds), rather than single atomic S-vacancies due to steric effects. Similarly, the geometric structure of PANI in the vdW gaps of 1T-MoS 2 nanosheets possesses a flat-lying configuration for better stability. Compared to surface functionalization, interlayer intercalation has more profound effects on electronic structures for improving electrochemical properties, including reduced band gaps, small effective electron masses, and high mobility. As a proof-of-concept application, the 1T-MoS 2 −PANI nanocomposites were used to construct an electrochemical sensor for trace Cu 2+ , which exhibits high sensitivity and selectivity with a wide linear range from 3 to 450 nM and a low detection limit because of excellent conductivity, a low contact barrier against electron transfer, high mass transfer, and strong coordination interactions between PANI and Cu 2+ .

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“…Although they are the third most abundant transition metal elements and essential for the catalytic process in human metabolism, an excess amount of Cu 2+ is hazardous for normal oxidative and reductive processes, resulting in damage of liver and kidney as well as degenerative neurological disease . Among the diverse analytical technologies for Cu 2+ , − photoelectrochemical (PEC) analysis has stood out and thrived due to its merits of high sensitivity, low background, low cost, and simple instrumentation. − However, most of the reported works relied on single signal outputs, which may show false positive or negative results. Besides, the results cannot be observed directly, making it inconvenient for on-site screening.…”

Section: Introductionmentioning

confidence: 99%

Dual-Modal Photoelectrochemical and Visualized Detection of Copper Ions

Zhang

Dai

et al. 2022

ACS Omega

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Copper is one of the extensively utilized heavy metals in modern industry and can be easily released into the environment due to high solubility of copper ions (Cu2+). Its percolation in water and accumulation along the food chain pose a serious threat to human health. Hence, it is of great significance to explore a novel, facile, and sensitive detection method for Cu2+. Based on the intriguing photo-to-electricity conversion process of CdS QDs, as well as desirable electrochromic property of WO3 NFs, a dual-modal photoelectrochemical (PEC) and visualized detection platform for Cu2+ is fabricated. The electrochromic WO3 NFs act as a display for the Cu2+ concentration, of which the color change could be observed directly by the naked eye, while the PEC signal provides accurate data for further analysis. In this work, a sensitive detection of Cu2+ in the range of 1 × 10–5 to 5 × 10–4 M is achieved, with a detection limit of 3.2 × 10–6 M. The dual-modal analysis gives more choices for signal readouts with enhanced quantification reliability, which is adaptive for diverse application scenarios, especially for on-site investigation. This protocol offers a prototype for quick and reliable detection of the Cu2+ concentrations, and is promising for other environmental pollutants.

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Facile synthesis of oxidized multi-walled carbon nanotubes functionalized with 5-sulfosalicylic acid/MoS2 nanosheets nanocomposites for electrochemical detection of copper ions

Cited by 29 publications

References 50 publications

β-Cyclodextrin/CMK-8-Based Electrochemical Sensor for Sensitive Detection of Cu2+

β-Cyclodextrin/CMK-8-Based Electrochemical Sensor for Sensitive Detection of Cu2+

Polyaniline Functionalization of Defective 1T-MoS₂ Nanosheets for Improved Electron and Mass Transfer: Implications for Electrochemical Sensors

Dual-Modal Photoelectrochemical and Visualized Detection of Copper Ions

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Facile synthesis of oxidized multi-walled carbon nanotubes functionalized with 5-sulfosalicylic acid/MoS2 nanosheets nanocomposites for electrochemical detection of copper ions

Cited by 29 publications

References 50 publications

β-Cyclodextrin/CMK-8-Based Electrochemical Sensor for Sensitive Detection of Cu2+

β-Cyclodextrin/CMK-8-Based Electrochemical Sensor for Sensitive Detection of Cu2+

Polyaniline Functionalization of Defective 1T-MoS2 Nanosheets for Improved Electron and Mass Transfer: Implications for Electrochemical Sensors

Dual-Modal Photoelectrochemical and Visualized Detection of Copper Ions

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Polyaniline Functionalization of Defective 1T-MoS₂ Nanosheets for Improved Electron and Mass Transfer: Implications for Electrochemical Sensors