Few-layer Mg-deficient borophene nanosheets: I<sub>2</sub> oxidation and ultrasonic delamination from MgB<sub>2</sub>

Feng, Zhang; Jia, Congying; Zhang, Nan; He, Xuexia; Li, Qi; Sun, Jie; Jiang, Ruibin; Lei, Zhibin; Liu, Zong‐Huai

doi:10.1039/d1nr07353b

Cited by 7 publications

(4 citation statements)

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“…For instance, exfoliated layered MgB 2 yields Mgdeficient BNSs. Our group utilized I 2 as the oxidant and acetonitrile/HCl as the reaction medium to prepare Mgdeficient borophene nanosheets (FBN), 99 as shown in Figure 6c. The fabricated FBN exhibits a 2D sheet-like morphology with an average thickness of 4.14 nm and a transverse size of 500 nm, and demonstrates good crystallinity corresponding to rhombohedral boron, with a maximum Mg removal rate of up to 78%.…”

Section: Two-dimension (2d) Boron Nanomaterialsmentioning

confidence: 99%

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Mono-Element Boron Nanomaterials for Energy Conversion and Storage: Preparation, Recent Progress, and Perspectives

Li,

Liu,

2024

Energy Fuels

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The development on mono-element nonmetallic materials is of great significance for achieving low-cost and highperformance conversion and storage of clean and renewable energy. As number of mono-element groups, boron has owned the intrinsic unique electronic deficiency and diversified crystal structures, and displayed the utilization potential in the energy conversion and storage fields. Especially, the various boron nanomaterials have attracted extensive attentions on the basis of their several properties, such as metallic and semiconductor characteristics, electrocatalytic activity, exceptional mechanical strength and thermal stability, which could meet the increasing demands for efficient energy conversion and storage materials. In this review, the recent advances of mono-element boron nanomaterials for energy conversion and storage have been summarized comprehensively. The experimental preparation methods, as well as physical and chemical and properties of boron nanomaterials are analyzed based on the classification of material morphologies. In addition, a special focus has been proposed on their plentiful applications as active/catalytic electrode materials in energy storage devices, and as electrocatalysts or photocatalysts in energy conversion systems. Finally, the challenges and potential opportunities have been discussed for mono-element boron nanomaterials in energy conversion and storage.

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Section: Two-dimension (2d) Boron Nanomaterialsmentioning

confidence: 99%

“…(c) Preparation process illustration and morphology distribution (SEM and AFM) images of Mg-deficient BNSs prepared by I 2 oxidation and ultrasonic delamination . Reproduced with permission from ref . Copyright 2022 Royal Society of Chemistry.…”

Section: Preparation and Properties Of Mono-element Boron Nanomaterialsmentioning

confidence: 99%

Mono-Element Boron Nanomaterials for Energy Conversion and Storage: Preparation, Recent Progress, and Perspectives

Li,

Liu,

2024

Energy Fuels

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“…Xiao et al recently reported a method to synthesize MXene-like MgB 2 nanosheets where the bulk powder was ultrasonicated in DI water followed by etching using HCl . Very recently, Zhang et al adopted an ultrasound and oxidation assisted liquid-phase approach to delaminate MgB 2 into nanosheets . In this work, bulk MgB 2 was dispersed in a mixture of acetonitrile and hydrochloric acid and I 2 was used as an oxidizer.…”

Section: Magnesium Diboride (Mgb2)mentioning

confidence: 99%

“…37 Very recently, Zhang et al adopted an ultrasound and oxidation assisted liquid-phase approach to delaminate MgB 2 into nanosheets. 38 In this work, bulk MgB 2 was dispersed in a mixture of acetonitrile and hydrochloric acid and I 2 was used as an oxidizer. The authors state that this process led to the oxidation of MgB 2 , however the process had to be carried out for 14 days.…”

Section: Liquid-phase Exfoliationmentioning

confidence: 99%

Quasi-Two-Dimensional Nanostructures from AlB₂-Type Metal Borides: Physicochemical Insights and Emerging Trends

et al. 2022

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Transition-metal diborides are a class of abundantly available ceramic materials that exhibit a landscape of rich properties such as extraordinary high strength, exceptional hardness, and high-melting points. To date, these materials have been investigated primarily for their bulk scale properties. Many of these transition-metal diborides adopt an AlB2-type structure. In this type of structure, the metal atoms are sandwiched between alternating layers of boron atoms. Examples of these types of borides include, magnesium diboride (MgB2), titanium diboride (TiB2), chromium diboride (CrB2), etc. The AlB2-type structure is appealing for a plethora of reasons, primary among them is the inherent presence of boron atoms arranged in a honeycomb pattern reminiscent of the graphenic arrangement. This provides an opportunity to access two-dimensional (2D) boron. Recent research trends indicate a rising interest in nanoscaling these borides to yield 2D nanostructures. Research groups across the globe are currently pursuing this very objective, and multiple reports have already emerged showing that it is possible to nanoscale these bulk AlB2-type borides into nanosheets. One of the routes that researchers have adopted to this end is the well-recognized, top-down exfoliation. This involves methods such as liquid-phase exfoliation, mechanical exfoliation, and chemically induced selective extraction. This review will chronicle the research evolution of top-down exfoliation of metal borides from a physicochemical context and present the reader with a summary of these methods and the associated findings. We will also briefly discuss the various areas where these nanoscaled metal borides have just started finding applications toward sustainable technologies and present our perspective on where the field is headed. We hope that this review will be a timely addition to the fast-evolving literature on nanoscaling metal borides.

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Size‐Controlled Boron‐Based Bifunctional Photocathodes for High‐Efficiency Photo‐Assisted Li–O₂ Batteries

Li,

Ma,

Jia

et al. 2023

Advanced Science

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Photo-assisted Li-O 2 batteries are introduced as a promising strategy for reducing severe overpotential by directly employing photocathodes. Herein, a series of size-controlled single-element boron photocatalysts are prepared by the meticulous liquid phase thinning methods by combining probe and water bath sonication, and their bifunctional photocathodes in the photo-assisted Li-O 2 batteries are systematically investigated. The boron-based Li-O 2 batteries have shown incremental round-trip efficiencies as the sized reduction of boron under illumination. It is noteworthy that the completely amorphous boron nanosheets (B 4 ) photocathode not only delivers an optimizing round-trip efficiency of 190% on the basis of the ultra-high discharge voltage (3.55 V) and ultra-low charge voltage (1.87 V) but also gives a high rate performance and ultralong durability with a round-trip efficiency of 133% after 100 cycles (200 h) compared with the other-sized boron photocathodes. This remarkable photoelectric performance of the B 4 sample can be attracted to the synergistic effect on the suitable semiconductor property, high conductivity, and strengthened catalytic ability of boron nanosheets coated with ultrathin amorphous boron-oxides overlayer. This research can open a new avenue to facilitate the rapid development of high-efficiency photo-assisted Li-O 2 batteries.

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Few-layer Mg-deficient borophene nanosheets: I₂ oxidation and ultrasonic delamination from MgB₂

Abstract: By using I2 as the oxidant and CH3CN as reaction medium, few-layer Mg-deficient borophene nanosheets (FBN) with a stoichiometric ratio of Mg0.22B2 is prepared by oxidizing MgB2 in a mixture...

Cited by 7 publications

References 44 publications

Mono-Element Boron Nanomaterials for Energy Conversion and Storage: Preparation, Recent Progress, and Perspectives

Mono-Element Boron Nanomaterials for Energy Conversion and Storage: Preparation, Recent Progress, and Perspectives

Quasi-Two-Dimensional Nanostructures from AlB₂-Type Metal Borides: Physicochemical Insights and Emerging Trends

Size‐Controlled Boron‐Based Bifunctional Photocathodes for High‐Efficiency Photo‐Assisted Li–O₂ Batteries

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Few-layer Mg-deficient borophene nanosheets: I2 oxidation and ultrasonic delamination from MgB2

Abstract: By using I2 as the oxidant and CH3CN as reaction medium, few-layer Mg-deficient borophene nanosheets (FBN) with a stoichiometric ratio of Mg0.22B2 is prepared by oxidizing MgB2 in a mixture...

Cited by 7 publications

References 44 publications

Mono-Element Boron Nanomaterials for Energy Conversion and Storage: Preparation, Recent Progress, and Perspectives

Mono-Element Boron Nanomaterials for Energy Conversion and Storage: Preparation, Recent Progress, and Perspectives

Quasi-Two-Dimensional Nanostructures from AlB2-Type Metal Borides: Physicochemical Insights and Emerging Trends

Size‐Controlled Boron‐Based Bifunctional Photocathodes for High‐Efficiency Photo‐Assisted Li–O2 Batteries

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Product

Resources

About

Few-layer Mg-deficient borophene nanosheets: I₂ oxidation and ultrasonic delamination from MgB₂

Quasi-Two-Dimensional Nanostructures from AlB₂-Type Metal Borides: Physicochemical Insights and Emerging Trends

Size‐Controlled Boron‐Based Bifunctional Photocathodes for High‐Efficiency Photo‐Assisted Li–O₂ Batteries