An electrochemical sensor based on Co<sub>3</sub>O<sub>4</sub> nanosheets for lead ions determination

Yu, Lei; Zhang, Ping; Dai, Hongxiu; Chen, Ling; Ma, Houyi; Lin, Meng; Shen, Dazhong

doi:10.1039/c7ra06269a

Cited by 49 publications

(16 citation statements)

References 35 publications

(28 reference statements)

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“…In a recent study, further improvements in analytical performance for the determination of Pb 2+ ions in water were achieved through electrodeposition of Co 3 O 4 nanosheets directly onto the indium tin oxide (ITO) electrodes. 877 The resulting electrodes, using DPASV, were capable of detecting Pb 2+ in 1−100 μg L −1 concentration range with the LOD of 0.52 μg L −1 and high selectivity against Ca 2+ , Mg 2+ , Fe 2+ , Zn 2+ , and Mn 2+ ionic interferents. Lin and co-workers used ultrathin two-dimensional TiO 2 nanosheets doped with fluorine, in layered electrode architecture (TiO 2 /GCE) for the detection of Pb 2+ ions.…”

Section: Transition Metal Dichalcogenidesmentioning

confidence: 95%

“…High sensitivity of the fabricated sensor was attributed to the presence of a nanochannel in the structure of Co 3 O 4 that are readily accessible for the diffusion of Pb 2+ ions providing large available surface area for metal crystal growth. In a recent study, further improvements in analytical performance for the determination of Pb 2+ ions in water were achieved through electrodeposition of Co 3 O 4 nanosheets directly onto the indium tin oxide (ITO) electrodes . The resulting electrodes, using DPASV, were capable of detecting Pb 2+ in 1–100 μg L –1 concentration range with the LOD of 0.52 μg L –1 and high selectivity against Ca 2+ , Mg 2+ , Fe 2+ , Zn 2+ , and Mn 2+ ionic interferents.…”

Section: Sensing Applicationsmentioning

confidence: 99%

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Electrically-Transduced Chemical Sensors Based on Two-Dimensional Nanomaterials

et al. 2019

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Electrically−transduced sensors, with their simplicity and compatibility with standard electronic technologies, produce signals that can be efficiently acquired, processed, stored, and analyzed. Two dimensional (2D) nanomaterials, including graphene, phosphorene (BP), transition metal dichalcogenides (TMDCs), and others, have proven to be attractive for the fabrication of high−performance electricallytransduced chemical sensors due to their remarkable electronic and physical properties originating from their 2D structure. This review highlights the advances in electricallytransduced chemical sensing that rely on 2D materials. The structural components of such sensors are described, and the underlying operating principles for different types of architectures are discussed. The structural features, electronic properties, and surface chemistry of 2D nanostructures that dictate their sensing performance are reviewed. Key advances in the application of 2D materials, from both a historical and analytical perspective, are summarized for four different groups of analytes: gases, volatile compounds, ions, and biomolecules. The sensing performance is discussed in the context of the molecular design, structure−property relationships, and device fabrication technology. The outlook of challenges and opportunities for 2D nanomaterials for the future development of electrically-transduced sensors is also presented.

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Section: Transition Metal Dichalcogenidesmentioning

confidence: 95%

Section: Sensing Applicationsmentioning

confidence: 99%

Electrically-Transduced Chemical Sensors Based on Two-Dimensional Nanomaterials

et al. 2019

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“…22 The material's valence state, the elemental composition, and the phase composition are confirmed by X-ray diffraction (XRD) patterns. Figure 2E 42,43 Additionally, the OH groups and water molecules at the interlayer of LDH show a broadband at around 3400 cm −1 . According to the above results, it can be concluded that Co 3 O 4 /MoCo/LDH is successfully formed.…”

Section: ■ Experimental Sectionmentioning

confidence: 97%

Co₃O₄/MoCo/Layered Double Hydroxide Nanosheets for Asymmetric Supercapacitor

Mousaabadi

Ensafi

Rezaei

2022

ACS Appl. Nano Mater.

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Recent research studies have focused on energy storage systems such as supercapacitors with high power density, good operational safety, and durable cycling life. Hence, the structure design effectively promotes the excellent performance of pseudocapacitive materials as an electrode in a supercapacitor. In this research, Co 3 O 4 /MoCo/LDH is prepared and fabricated as a binder-free electrode on the nickel foam. The Co 3 O 4 nanowires (NWs) and MoCo layered double hydroxides (LDHs) are synthesized via a hydrothermal pathway with a combination of calcination processes and characterized by various techniques, including attenuated total reflectance-infrared (ATR-IR), field emission-scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and X-ray diffraction (XRD) patterns. This electrode enlarges active sites and enhances the rates of ion/electron diffusion. As a result, the Co 3 O 4 /MoCo/LDH/NF electrode demonstrates a superb specific capacitance of 2677 F g −1 at 1.0 A g −1 , great cycling stability after 5000 cycles (maintaining 93.2% of its initial capacitance) at 9.0 A g −1 , and an excellent capacity retention rate of 62.86% at 15 A g −1 , which shows better performance than MoCo LDH/NF and Co 3 O 4 NWs/NF electrodes. Furthermore, an asymmetric supercapacitor is fabricated by Co 3 O 4 /MoCo/LDH and activated carbon; Co 3 O 4 /MoCo/LDH/NF//AC ASC exhibits a specific capacitance of 190.2 F g −1 at 1.0 A g −1 and an outstanding energy density of 67.62 Wh kg −1 at a high power density of 800 W kg −1 . Therefore, it is a promising electrode for energy storage applications.

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“…The surface modification is key in obtaining excellent performance in terms of sensitivity and specificity, although the significant additional costs, both in terms of added labour and final price of the device represent a limiting factor. Moreover, the short-term stability and the reproducibility of the preparation of modified electrodes has been highlighted recently as an important issue, which discourages further applications especially in industry [28][29][30]. Bare electrodes, without functionalization, represent an interesting alternative, in particular when high sensitivity is not required.…”

Section: Introductionmentioning

confidence: 99%

Bare carbon electrodes as simple and efficient sensors for the quantification of caffeine in commercial beverages

et al. 2018

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Food quality control is a mandatory task in the food industry and relies on the availability of simple, cost-effective and stable sensing platforms. In the present work, the applicability of bare glassy carbon electrodes for routine analysis of food samples was evaluated as a valid alternative to chromatographic techniques, using caffeine as test analyte. A number of experimental parameters were optimized and a differential pulse voltammetry was applied for quantification experiments. The detection limit was found to be 2 × 10−5 M (3σ criterion) and repeatability was evaluated by the relative standard deviation of 4.5%. The influence of sugars, and compounds structurally related to caffeine on the current response of caffeine was evaluated and found to have no significant influence on the electrode performance. The suitability of bare carbon electrodes for routine analysis was successfully demonstrated by quantifying caffeine content in seven commercially available drinks and the results were validated using a standard ultra-high performance liquid chromatography method. This work demonstrates that bare glassy carbon electrodes are a simple, reliable and cost-effective platform for rapid analysis of targets such as caffeine in commercial products and they represent therefore a competitive alternative to the existing analytical methodologies for routine food analysis.

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An electrochemical sensor based on Co₃O₄ nanosheets for lead ions determination

Abstract: In this work, Co3O4 nanosheets were fabricated on indium tin oxide (ITO) substrates by developing a simple electrochemical deposition and annealing method for lead ions detection.

Cited by 49 publications

References 35 publications

Electrically-Transduced Chemical Sensors Based on Two-Dimensional Nanomaterials

Electrically-Transduced Chemical Sensors Based on Two-Dimensional Nanomaterials

Co₃O₄/MoCo/Layered Double Hydroxide Nanosheets for Asymmetric Supercapacitor

Bare carbon electrodes as simple and efficient sensors for the quantification of caffeine in commercial beverages

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An electrochemical sensor based on Co3O4 nanosheets for lead ions determination

Abstract: In this work, Co3O4 nanosheets were fabricated on indium tin oxide (ITO) substrates by developing a simple electrochemical deposition and annealing method for lead ions detection.

Cited by 49 publications

References 35 publications

Electrically-Transduced Chemical Sensors Based on Two-Dimensional Nanomaterials

Electrically-Transduced Chemical Sensors Based on Two-Dimensional Nanomaterials

Co3O4/MoCo/Layered Double Hydroxide Nanosheets for Asymmetric Supercapacitor

Bare carbon electrodes as simple and efficient sensors for the quantification of caffeine in commercial beverages

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An electrochemical sensor based on Co₃O₄ nanosheets for lead ions determination

Co₃O₄/MoCo/Layered Double Hydroxide Nanosheets for Asymmetric Supercapacitor