One-step hydrothermal synthesis, characterization, and electrochemical sensor application of ternary Mn-Mo-O hybrid materials

Ding, Junwei; Liu, Tianjiao; Sun, Wei; Li, Jing‐Feng; Wei, Gang; Su, Zhiqiang

doi:10.1016/j.snb.2016.06.026

Cited by 7 publications

(3 citation statements)

References 46 publications

(50 reference statements)

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“…Hydrazine electro-oxidation was studied over the series of as-synthesized MnO 2 birnessite structures with different intercalants. Cyclic voltammograms (CVs) (see Figure a) of the electrode in 10 mM hydrazine in 0.1 M PBS at 10 mV s –1 show a sharp anodic peak around 1.22–1.30 V versus the RHE, which is in good agreement with previous reports corresponding to hydrazine oxidation on Mn-based materials. − Nevertheless, the bare GC electrode shows a small onset peak and a weaker current response due to less hydrazine oxidation as compared with those of the birnessite materials. The sharp oxidation peak occurs during the positive potential scan, while no peak occurs during the negative scan, suggesting an irreversible reaction.…”

Section: Results and Discussionsupporting

confidence: 90%

Effect of Intercalants inside Birnessite-Type Manganese Oxide Nanosheets for Sensor Applications

et al. 2020

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Hydrazine is a common reducing agent widely used in many industrial and chemical applications; however, its high toxicity causes severe human diseases even at low concentrations. To detect traces of hydrazine released into the environment, a robust sensor with high sensitivity and accuracy is required. An electrochemical sensor is favored for hydrazine detection owing to its ability to detect a small amount of hydrazine without derivatization. Here, we have investigated the electrocatalytic activity of layered birnessite manganese oxides (MnO 2 ) with different intercalants (Li + , Na + , and K + ) as the sensor for hydrazine detection. The birnessite MnO 2 with Li + as an intercalant (Li-Bir) displays a lower oxidation peak potential, indicating a catalytic activity higher than the activities of others. The standard heterogeneous electron transfer rate constant of hydrazine oxidation at the Li-Bir electrode is 1.09-and 1.17fold faster than those at the Na-Bir and K-Bir electrodes, respectively. In addition, the number of electron transfers increases in the following order: K-Bir (0.11 mol) < Na-Bir (0.17 mol) < Li-Bir (0.55 mol). On the basis of the density functional theory calculation, the Li-Bir sensor can strongly stabilize the hydrazine molecule with a large adsorption energy (−0.92 eV), leading to high electrocatalytic activity. Li-Bir also shows the best hydrazine detection performance with the lowest limit of detection of 129 nM at a signal-to-noise ratio of ∼3 and a linear range of 0.007−10 mM at a finely tuned rotation speed of 2000 rpm. Additionally, the Li-Bir sensor exhibits excellent sensitivity, which can be used to detect traces of hydrazine without any effect of interference at high concentrations and in real aqueous-based samples, demonstrating its practical sensing applications.

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Section: Results and Discussionsupporting

confidence: 90%

Effect of Intercalants inside Birnessite-Type Manganese Oxide Nanosheets for Sensor Applications

et al. 2020

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“…[39] Pioneering this endeavor, Su et al unveiled the construction of an N 2 H 4 electrochemical sensor founded upon Mn-Mo-O ternary hybrid materials. [40] Leveraging the synergistic prowess of Mn and Mo elements within the electrochemical milieu, this Mn-Mo-O sensor manifested rapid current responsiveness, an expansive linear detection range, and a notably low limit of detection (LOD) clocking in at 0.045 μm. Distinguished by its uncomplicated fabrication process, the Mn-Mo-O sensor further exhibited exemplary environmental compatibility and costeffectiveness, thus steering the trajectory of non-enzyme electrochemical N 2 H 4 sensors toward new horizons.…”

Section: Metal-based Nanomaterialsmentioning

confidence: 99%

Nanozyme‐Enhanced Electrochemical Biosensors: Mechanisms and Applications

Yang,

Guo,

Wang

et al. 2023

Small

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Nanozymes, as innovative materials, have demonstrated remarkable potential in the field of electrochemical biosensors. This article provides an overview of the mechanisms and extensive practical applications of nanozymes in electrochemical biosensors. First, the definition and characteristics of nanozymes are introduced, emphasizing their significant role in constructing efficient sensors. Subsequently, several common categories of nanozyme materials are delved into, including metal‐based, carbon‐based, metal‐organic framework, and layered double hydroxide nanostructures, discussing their applications in electrochemical biosensors. Regarding their mechanisms, two key roles of nanozymes are particularly focused in electrochemical biosensors: selective enhancement and signal amplification, which crucially support the enhancement of sensor performance. In terms of practical applications, the widespread use of nanozyme‐based electrochemical biosensors are showcased in various domains. From detecting biomolecules, pollutants, nucleic acids, proteins, to cells, providing robust means for high‐sensitivity detection. Furthermore, insights into the future development of nanozyme‐based electrochemical biosensors is provided, encompassing improvements and optimizations of nanozyme materials, innovative sensor design and integration, and the expansion of application fields through interdisciplinary collaboration. In conclusion, this article systematically presents the mechanisms and applications of nanozymes in electrochemical biosensors, offering valuable references and prospects for research and development in this field.

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“…Now a day fine particles of spinel oxides synthesized by chemical methods were shown to have magnetic properties markedly different from those prepared by the ceramic method. The various processing techniques, which are used for the synthesis of mixed metal oxides powders, include hydrothermal [7][8], microwave refluxing [9-11,], sol-gel [12][13][14], and co precipitation [15][16][17]. Among the Mn oxide spinel structured Ni-Mn, Cu-Mn oxides are referred to as negative temperature coefficient thermistors.…”

Section: Introduction:-mentioning

confidence: 99%

Synthesis, Structural and Magnetic Properties of Manganese Substituted Magnesium Chromite.

Mali.¹

2017

IJAR

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The nanocrystalline Mg 1-x Mn x Cr 2 O 4 (X=0.0, 0.25, 0.50, 0.75 and 1.0) chromite were synthesized by sol-gel autocombution route. Thermal analysis of precursor after autocombution was carried out by TG-DTA. X-ray diffraction confirmed the formation of single cubic spinel lattice for all compositions. Lattice parameter shows increasing trend with an increase in Mn content. Formation of spherical nanoparticals were revealed by scanning electron microscopy (SEM).The elemental analysis obtained by EDAX is in close agreement with the expected composition from the stoichiometry of reactant used. The magnetic data indicate that, all compositions are ferrimagnetic in nature. The detailed results of XRD, thermal analysis, SEM, EDAX and magnetic properties indicating the role of substitution of manganese metal ions on the structural and magnetic properties of magnesium chromites are presented.Copy Right, IJAR, 2017,. All rights reserved. …………………………………………………………………………………………………….... Introduction:-Mixed metal oxides are an important class of compounds and among them chromites are most prominent by virtue or their spinel structure with high thermodynamic stability. The interest in these oxides emerges from their versatile applicability in telecommunication, power transformers, audio and video and many other applications involving electrical signals. Oxides spinel have been extensively studied by several workers [1][2][3] in order to elucidates the relationship between structure, bonding and magnetic properties because of technological potential of these materials. The benefit found in the oxides due to their structural and chemical variations on a nano scale, which are important for developing optimal magnetic properties [4][5][6]. Now a day fine particles of spinel oxides synthesized by chemical methods were shown to have magnetic properties markedly different from those prepared by the ceramic method. The various processing techniques, which are used for the synthesis of mixed metal oxides powders, include hydrothermal [7][8], microwave refluxing [9-11,], sol-gel [12][13][14], and co precipitation [15][16][17]. Among the Mn oxide spinel structured Ni-Mn, Cu-Mn oxides are referred to as negative temperature coefficient thermistors. Materials of mixed metal oxide with low Hc are called magnetically soft while those with higher values are called hard materials. The soft materials have high permeability and are used in applications at high frequencies [18].The aim of present investigation is to synthesize the novel manganese substituted magnesium chromite nanoparticles by using sol-gel autocombution route. It is a simple process, which offers a significant saving in time and energy consumption over the traditional methods, and requires less sintering temperature. This method is employed to

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One-step hydrothermal synthesis, characterization, and electrochemical sensor application of ternary Mn-Mo-O hybrid materials

Cited by 7 publications

References 46 publications

Effect of Intercalants inside Birnessite-Type Manganese Oxide Nanosheets for Sensor Applications

Effect of Intercalants inside Birnessite-Type Manganese Oxide Nanosheets for Sensor Applications

Nanozyme‐Enhanced Electrochemical Biosensors: Mechanisms and Applications

Synthesis, Structural and Magnetic Properties of Manganese Substituted Magnesium Chromite.

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