A Review of Recent Progress on Nano MnO2: Synthesis, Surface Modification and Applications

Baral, Ayonbala; Satish, Lakkoji; Zhang, Guoying; Ju, Shaohua; Ghosh, Malay Kumar

doi:10.1007/s10904-020-01823-z

Cited by 26 publications

(16 citation statements)

References 195 publications

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“…The performance of MnO 2 nanomaterials depends on their structure, surface functionalities, and morphologies . Several methods have been reported to prepare 2D MnO 2 NSs, and these methods are broadly classified as top-down and bottom-up approaches. ,, The first report on the formation of 2D MnO 2 NSs was by Omomo et al using the top-down approach .…”

Section: Synthetic Methodsmentioning

confidence: 99%

Review of 2D MnO₂ Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications

Hiremath

Banerjee

Chatterjee

2022

ACS Appl. Nano Mater.

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In the past decade, a variety of MnO 2 nanostructures have been used in chemosensing applications because of their unique redox properties, structural diversity, and broad absorption band, which makes them good energy acceptors. The most common strategy in Forster (or fluorescence) resonance energy transfer (FRET)-based chemosensing assays is to use low-dimensional fluorescent dots like carbon-based dots, metal dots, and even fluorescent dyes to form donor−acceptor pairs with 2D MnO 2 nanosheets (NSs). This review is a collection of the current library on fluorescent nanodots and MnO 2 NSs-based FRET conjugates as sensing platforms with a focus on highlighting the strategies involved in the detection of various analytes. Commonly, an analyte-triggered redox reaction results in the decomposition of MnO 2 NSs, leading to the release of fluorescent nanodots in solution for the turn-on detection of various reducing species. We intend to elaborately discuss the systematic upgradation of detection strategies involving fluorescent dots@2D MnO 2 NSs. Recently, a cascade of redox reactions was judiciously employed to target several bioanalytes involving a fluorescent dots@MnO 2 NSs FRET conjugate in a selective and sensitive manner. These sensing assays are categorized by the use of different fluorescent nanodots [carbon dots (CDs) and graphene quantum dots (GQDs), polymer dots, metal dots, etc.] with 2D MnO 2 NSs as FRET pairs in different sensing applications. Further, the analytes were categorized as reducing species, oxidants, enzymes, microbes, etc. The focus was paid to the sensing efficiency of the analytical tool. As a part of the study, a brief account of the synthesis of nanodots and MnO 2 NSs, their properties, and the FRET mechanism is also included. In a few cases, the sensing mechanism follows an inner filter effect without a prerequisite of the distance between the fluorophore and quencher units in the sensing of analytes, which are also covered in this collection. The available literature indicates a bright future for these FRET-based contemporary sensing strategies as environmentally benign, cost-effective, label-free techniques, which are discussed in the end.

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Section: Synthetic Methodsmentioning

confidence: 99%

Review of 2D MnO₂ Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications

Hiremath

Banerjee

Chatterjee

2022

ACS Appl. Nano Mater.

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“…Meanwhile, the photocatalytic efficiency of MnO 2 is affected by its crystal form (α-, β-, γ-, δ-, and λ-types), morphology and structure. These factors are directly related to the preparation method, process, and parameters [ 31 , 32 , 33 , 34 , 35 ]. At present, a large number of studies have found that α-MnO 2 has good photocatalytic performance, and the catalytic efficiency can be further improved after MnO 2 and carbon are compounded [ 36 , 37 , 38 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of MnO2-Carbon Materials and Their Applications in Photocatalytic Water Treatment

et al. 2023

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Water pollution is one of the most important problems in the field of environmental protection in the whole world, and organic pollution is a critical one for wastewater pollution problems. How to solve the problem effectively has triggered a common concern in the area of environmental protection nowadays. Around this problem, scientists have carried out a lot of research; due to the advantages of high efficiency, a lack of secondary pollution, and low cost, photocatalytic technology has attracted more and more attention. In the past, MnO2 was seldom used in the field of water pollution treatment due to its easy agglomeration and low catalytic activity at low temperatures. With the development of carbon materials, it was found that the composite of carbon materials and MnO2 could overcome the above defects, and the composite had good photocatalytic performance, and the research on the photocatalytic performance of MnO2-carbon materials has gradually become a research hotspot in recent years. This review covers recent progress on MnO2-carbon materials for photocatalytic water treatment. We focus on the preparation methods of MnO2 and different kinds of carbon material composites and the application of composite materials in the removal of phenolic compounds, antibiotics, organic dyes, and heavy metal ions in water. Finally, we present our perspective on the challenges and future research directions of MnO2-carbon materials in the field of environmental applications.

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“…On the other hand, the poor ion/electric conductivity of the transition metal oxide would sacrifice the rate capability of the zinc battery [9,22,23]. At present, various strategies such as nanostructure engineering [24][25][26], conductive agent coating [27], and ion doping are widely adopted to tackle the above problems [21,28,29]. Among the various strategies, ion doping involves a small number of guest ions being preinserted into the manganese-based oxide framework and interacting with the host atoms to achieve an inherent structure optimization, which significantly enhances the electrochemical performance from a fundamental thermodynamics and dynamics aspect.…”

Section: Introductionmentioning

confidence: 99%

Challenges and Perspectives for Doping Strategy for Manganese-Based Zinc-ion Battery Cathode

et al. 2022

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As one of the most appealing options for large-scale energy storage systems, the commercialization of aqueous zinc-ion batteries (AZIBs) has received considerable attention due to their cost effectiveness and inherent safety. A potential cathode material for the commercialization of AZIBs is the manganese-based cathode, but it suffers from poor cycle stability, owing to the Jahn–Teller effect, which leads to the dissolution of Mn in the electrolyte, as well as low electron/ion conductivity. In order to solve these problems, various strategies have been adopted to improve the stability of manganese-based cathode materials. Among those, the doping strategy has become popular, where the dopant is inserted into the intrinsic crystal structures of electrode materials, which would stabilize them and tune the electronic state of the redox center to realize high ion/electron transport. Herein, we summarize the ion doping strategy from the following aspects: (1) synthesis strategy of doped manganese-based oxides; (2) valence-dependent dopant ions in manganese-based oxides; (3) optimization mechanism of ion doping in zinc-manganese battery. Lastly, an in-depth understanding and future perspectives of ion doping strategy in electrode materials are provided for the commercialization of manganese-based zinc-ion batteries.

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A Review of Recent Progress on Nano MnO2: Synthesis, Surface Modification and Applications

Cited by 26 publications

References 195 publications

Review of 2D MnO₂ Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications

Review of 2D MnO₂ Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications

Preparation of MnO2-Carbon Materials and Their Applications in Photocatalytic Water Treatment

Challenges and Perspectives for Doping Strategy for Manganese-Based Zinc-ion Battery Cathode

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A Review of Recent Progress on Nano MnO2: Synthesis, Surface Modification and Applications

Cited by 26 publications

References 195 publications

Review of 2D MnO2 Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications

Review of 2D MnO2 Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications

Preparation of MnO2-Carbon Materials and Their Applications in Photocatalytic Water Treatment

Challenges and Perspectives for Doping Strategy for Manganese-Based Zinc-ion Battery Cathode

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Product

Resources

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Review of 2D MnO₂ Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications

Review of 2D MnO₂ Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications