The Synthesis and Characterization of h-BN Nanosheets with High Yield and Crystallinity

Li, Shaocheng; Lu, Xianlang; Lou, Yanda; Liu, Kejun; Zou, Ben-Xue

doi:10.1021/acsomega.1c03406

Cited by 16 publications

(8 citation statements)

References 44 publications

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“…The high-resolution TEM (HRTEM) image of the 68.6% h-BNNs/CNTs nanocomposite (Figure c,d) shows two different lattice spaces. The lattice spacing of ∼0.21 nm matched well with those determined from the geometric structure of the (100) crystal plane of h-BNNs, and the lattice spacing of ∼0.34 nm corresponded to the (004) plane of CNTs. ,− These results demonstrated the successful combination of h-BNNs with CNTs. Here, since the (100) plane of h-BNNs was more likely to be exposed in TEM observation, it was supposed that this (100) plane would be involved in eNRR.…”

Section: Resultssupporting

confidence: 65%

Boosting the Faraday Efficiency of Electrochemical Ammonia Synthesis via the Strain Effect Induced by Interfacial Hybrid Formation between BN and Carbon Nanotubes

Zhang,

Shen,

et al. 2024

ACS Appl. Mater. Interfaces

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The electrochemical nitrogen reduction reaction (eNRR) is a highly promising alternative to the Haber−Bosch (H− B) process, but its commercial development is limited by the high bond energy of N 2 molecules and the presence of the competitive hydrogen evolution reaction (HER). Here, a metal-free composite electrocatalyst of boron nitride (h-BNNs) and carbon nanotubes (CNTs) was explored through the interfacial hybridization of h-BNNs and CNTs, which showed a highly improved eNRR Faraday efficiency (FE) of 63.9% and an NH 3 yield rate of 36.5 μg h −1 mg cat.−1 at −0.691 V (vs RHE). New chemical bonds of C−B and C−N were observed, indicating a strong interaction between CNTs and h-BNNs. According to the Raman spectra and the optimized model of h-BNNs/CNTs, an obvious strain effect between h-BNNs and CNTs was supposed to play a significant role in the highly improved FE, compared with the FE of h-BNNs alone (4.7%). Density functional theory (DFT) calculations further showed that h-BNNs/CNTs had lower energy barriers in eNRR, giving them higher N 2 to NH 3 selectivity, while h-BNNs have lower energy barriers in the HER. This work shows the important role of the strain effect in boosting the selectivity in the eNRR process.

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Section: Resultssupporting

confidence: 65%

Boosting the Faraday Efficiency of Electrochemical Ammonia Synthesis via the Strain Effect Induced by Interfacial Hybrid Formation between BN and Carbon Nanotubes

Zhang,

Shen,

et al. 2024

ACS Appl. Mater. Interfaces

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“…This unique property enables CS to effectively trap Au(III) ions, leading to a high amount of AuNP formation inside the CS layer. 34 Therefore, the number of AuNPs on CS/FP was notably greater than that on the plasmonic paper derived from the in situ reduction of ALG/FP. In the case of the double-layered coating, a notable increase in the number of AuNPs formed on the substrate was evident in the SEM image displayed in Figure 1c.…”

Section: Resultsmentioning

confidence: 93%

Layer-by-Layer Biopolymer Assembly for the In Situ Fabrication of AuNP Plasmonic Paper─A SERS Substrate for Food Adulteration Detection

Viriyakitpattana,

Rattanabut,

Lertvachirapaiboon

et al. 2024

ACS Omega

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Here, we introduce an environmentally friendly approach to fabricate a simple and cost-effective plasmonic paper for detecting food additives using surface-enhanced Raman spectroscopy (SERS). The plasmonic paper is fabricated by in situ growth of gold nanoparticles (AuNPs) on filter paper (FP). To facilitate this green fabrication process, we applied a double-layered coating of biopolymers, chitosan (CS) and alginate (ALG), onto the FP using a layer-by-layer (LbL) assembly through electrostatic interactions. Compared to single-layer biopolymer coatings, double-layered biopolymer-coated paper, ALG/CS/FP, significantly improves the reduction properties. Consequently, effective in situ growth of AuNPs can be achieved as seen in high density of AuNP formation on the substrate. The resulting plasmonic paper provides high SERS performance with an enhancement factor (EF) of 5.7 × 10 10 and a low limit of detection (LOD) as low as 1.37 × 10 −12 M 4-mercaptobenzoic acid (4-MBA). Furthermore, it exhibits spot-to-spot reproducibility with a relative standard deviation (RSD) of 8.2% for SERS analysis and long-term stability over 50 days. This paper-based SERS substrate is applied for melamine (MEL) detection with a low detection limit of 0.2 ppb, which is sufficient for monitoring MEL contamination in milk based on food regulations. Additionally, we demonstrate a simultaneous detection of βagonists, including ractopamine (RAC) and salbutamol (SAL), exhibiting the multiplexing capability and versatility of the plasmonic paper in food contaminant analysis. The development of this simple plasmonic paper through the LbL biopolymer assembly not only paves the way for novel SERS substrate fabrication but also broadens the application of SERS technology in food contaminant monitoring.

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“…[ 86c,87 ] The synthesis of h‐BN employs mechanical separation, CVD, wet chemical routes, etc. [ 86c,88 ] In h‐BN (honeycomb‐like structure), B and N atoms are arranged alternately where the BN bond length is 1.45 Å. The interlayer spacing between two layers of h‐BN is 0.333 nm (interlayer spacing in graphene is 0.335 nm).…”

Section: Pces For Lithium Batteries Using Synthetic Inorganic 2d Laye...mentioning

confidence: 99%

2D Layered Nanomaterials as Fillers in Polymer Composite Electrolytes for Lithium Batteries

Vijayakumar

Ghosh

Asokan

et al. 2023

Advanced Energy Materials

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there have been tremendous efforts to improve their performance, safety, costeffectiveness, and sustainability. [1] In the last four decades, dedicated research in material science toward developing electrodes, separators, electrolytes, current collectors, packaging materials, etc., have significantly contributed to the advancement of LIB technology. [2] Indeed, the progress in cell engineering and processing conditions has aided the evolution of high energy density LIBs (energy density >250 Wh kg −1 ), leading to their widespread application spanning from electronic devices to electric vehicles and stationary/ grid energy storage. [1] Considering the contributions that led to the invention of LIB technology, John B. Goodenough, Stanley Whittingham, and Akira Yoshino received the Chemistry Nobel Prize in 2019. [3] Despite their huge success, research and development on LIBs and allied battery technologies are still a hot topic in both academia and industry offering opportunities for breakthrough innovations and discoveries. Figure 1a presents a schematic illustration of the state-of-theart LIB and its main components. Liquid electrolytes based on organic solvents and lithium salts are the primary choice as electrolytes in LIBs due to their high ionic conductivity and good Polymer composite electrolytes (PCEs), i.e., materials combining the disciplines of polymer chemistry, inorganic chemistry, and electrochemistry, have received tremendous attention within academia and industry for lithiumbased battery applications. While PCEs often comprise 3D micro-or nanoparticles, this review thoroughly summarizes the prospects of 2D layered inorganic, organic, and hybrid nanomaterials as active (ion conductive) or passive (nonion conductive) fillers in PCEs. The synthetic inorganic nanofillers covered here include graphene oxide, boron nitride, transition metal chalcogenides, phosphorene, and MXenes. Furthermore, the use of naturally occurring 2D layered clay minerals, such as layered double hydroxides and silicates, in PCEs is also thoroughly detailed considering their impact on battery cell performance. Despite the dominance of 2D layered inorganic materials, their organic and hybrid counterparts, such as 2D covalent organic frameworks and 2D metal-organic frameworks are also identified as tuneable nanofillers for use in PCE. Hence, this review gives an overview of the plethora of options available for the selective development of both the 2D layered nanofillers and resulting PCEs, which can revolutionize the field of polymer-based solid-state electrolytes and their implementation in lithium and post-lithium batteries.

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The Synthesis and Characterization of h-BN Nanosheets with High Yield and Crystallinity

Cited by 16 publications

References 44 publications

Boosting the Faraday Efficiency of Electrochemical Ammonia Synthesis via the Strain Effect Induced by Interfacial Hybrid Formation between BN and Carbon Nanotubes

Boosting the Faraday Efficiency of Electrochemical Ammonia Synthesis via the Strain Effect Induced by Interfacial Hybrid Formation between BN and Carbon Nanotubes

Layer-by-Layer Biopolymer Assembly for the In Situ Fabrication of AuNP Plasmonic Paper─A SERS Substrate for Food Adulteration Detection

2D Layered Nanomaterials as Fillers in Polymer Composite Electrolytes for Lithium Batteries

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