Surface coordination modification and electrical properties of few-layer black phosphorus exfoliated by the liquid-phase method

Jia, Caihong; Zhao, Lei; Cui, Mengsi; Yang, Feng; Cheng, Gang; Yang, Guanghong; Zeng, Zaiping

doi:10.1016/j.jallcom.2019.05.346

Cited by 25 publications

(10 citation statements)

References 34 publications

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“…Lattice fringes (0.25 nm) belonging to the (111) crystal plane observed in the high-resolution TEM (HRTEM) image (Figure b) correspond to the results of X-ray diffraction (XRD) (Figure h). The orthogonal crystal structure of BP-NH 2 was also confirmed by selected area electron diffraction (SAED) (Figure c). , We observed the local morphology (Figure d) and carried out the size statistics (Figure S1a) of BP-NH 2 by scanning electron microscopy (SEM). The transverse dimensions of 100 BP-NH 2 nanosheets were recorded, and the calculated average size was 444.24 nm.…”

Section: Results and Discussionmentioning

confidence: 68%

Optimization of Flexible Nacre-Like Cellulose Nanofiber Films by a Covalent Overlapping Method: Excellent Thermal Conductivity and Superior Flame Resistance

Guo

Peng

Wang

et al. 2023

Ind. Eng. Chem. Res.

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Facing the explosive growth of heat flux in microelectronic equipment, advanced thermal management materials should not only ensure the safe and stable operation of equipment, but also have the ability to withstand fire risks. Carbon materials such as graphene are subject to many restrictions in use due to their inherent high conductivity. Hexagonal boron nitride (h-BN) is often used to blend with polymers to prepare flexible thermal management materials due to its excellent electrical insulation and thermal conductivity. However, its further application is limited by its insufficient flame resistance and limited improvement of thermal conductivity at low filling levels. In this paper, urea-assisted ball milling is used to achieve the amination of boron nitride nanosheets (BNNS) and black phosphorus (BP), which creates the covalent bond between the filler and the cellulose. With the overlapping between small-size BP and large-size BNNS, the thermal conductivity, flame resistance, and mechanical properties of the film are significantly enhanced. Accordingly, the cellulose nanofiber (CNF)-based film has a high thermal conductivity of 42.29 W m–1 K–1 at 50 wt % loading (40 wt % BNNS-NH2 and 10 wt % BP-NH2), which is 777% higher than that of pure CNF. In addition, the peak heat release rate and total heat release of CBP10 decrease by 80.3 and 64.7%, respectively, compared with pure CNF, and the residue is more complete and denser, indicating that the film can effectively reduce and delay the fire hazard.

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Section: Results and Discussionmentioning

confidence: 68%

Optimization of Flexible Nacre-Like Cellulose Nanofiber Films by a Covalent Overlapping Method: Excellent Thermal Conductivity and Superior Flame Resistance

Guo

Peng

Wang

et al. 2023

Ind. Eng. Chem. Res.

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“…Figure 3b is the simple schematic demonstration of liquid phase exfoliation through sonication and ion intercalation and exfoliation through the electrochemical method to obtain the nanosheets at the end as a major product. A wide domain of other 2D materials can also be synthesized such as graphene [142][143][144][145], boron nitride [146,147] and phosphorene [148,149] by this method. Depending on the energy source implemented for exfoliation and dispersion of nanosheets, the liquid phase exfoliation method has been divided into two categories, i.e., liquid exfoliation through sonication [150] and liquid exfoliation through sheer force.…”

Section: Liquid Phase Exfoliation Of Tmdcsmentioning

confidence: 99%

Graphene to Advanced MoS2: A Review of Structure, Synthesis, and Optoelectronic Device Application

et al. 2020

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In contrast to zero-dimensional (0D), one-dimensional (1D), and even their bulk equivalents, in two-dimensional (2D) layered materials, charge carriers are confined across thickness and are empowered to move across the planes. The features of 2D structures, such as quantum confinement, high absorption coefficient, high surface-to-volume ratio, and tunable bandgap, make them an encouraging contestant in various fields such as electronics, energy storage, catalysis, etc. In this review, we provide a gentle introduction to the 2D family, then a brief description of transition metal dichalcogenides (TMDCs), mainly focusing on MoS2, followed by the crystal structure and synthesis of MoS2, and finally wet chemistry methods. Later on, applications of MoS2 in dye-sensitized, organic, and perovskite solar cells are discussed. MoS2 has impressive optoelectronic properties; due to the fact of its tunable work function, it can be used as a transport layer, buffer layer, and as an absorber layer in heterojunction solar cells. A power conversion efficiency (PCE) of 8.40% as an absorber and 13.3% as carrier transfer layer have been reported for MoS2-based organic and perovskite solar cells, respectively. Moreover, MoS2 is a potential replacement for the platinum counter electrode in dye-sensitized solar cells with a PCE of 7.50%. This review also highlights the incorporation of MoS2 in silicon-based heterostructures where graphene/MoS2/n-Si-based heterojunction solar cell devices exhibit a PCE of 11.1%.

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“…Stabilization techniques of LBP included chemical protection methods (covalent functionalization and noncovalent functionalization (Abellán et al, 2016)), physical methods (capping layers ( van Druenen, 2020) and polymer-based protection (Li et al, 2016)) and solvent-based stabilization methods (Hanlon et al, 2015). Chemical protection methods introduced organic compound ligands, and then potentially caused chemical pollution (Jia et al, 2019). Physical protection methods not only require demanding operation techniques and complicated environmental conditions, but also make LBP difficult to interact with metal contacts or chemical reagents (Yan et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Protection mechanism of N,N-dimethylformamide on stability of few-layer black phosphorus

Lei

Zhang

Lou

et al. 2023

Front. Environ. Sci.

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Few-layer black phosphorus (LBP) has been widely investigated for its unique optical and electronic properties. As degradation of LBP in ambient conditions largely limited its practical applications, numerous stabilization methods were developed. Understanding stabilization mechanism is essential to development of new protection technologies for LBP. Herein, protection mechanism of the most wildly used exfoliation solvent N,N-dimethylformamide (DMF) on LBP was investigated. DMF was found to accelerate color fading of LBP in aerobic water solution. Nevertheless, dissolvable phosphorus generated from degradation of LBP in the presence of DMF accounted for only 52%–57% of that generated in the absence of DMF. By measuring kinetics constants and activation energies of the degradation reactions, the protection mechanism of DMF was attributed to impede hydrolysis of phosphorus oxides. This was caused by occupation of oxidation sites on LBP by DMF through electrostatic interaction. Insoluble phosphorus oxides in addition to dissolvable phosphorus were observed in DMF exfoliated LBP aqueous solution, providing further evidence for hydrolysis impeding mechanism. This finding threw mechanism light on protection effects of DMF on LBP, providing new knowledge for development of effective stabilization technologies of LBP.

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Surface coordination modification and electrical properties of few-layer black phosphorus exfoliated by the liquid-phase method

Cited by 25 publications

References 34 publications

Optimization of Flexible Nacre-Like Cellulose Nanofiber Films by a Covalent Overlapping Method: Excellent Thermal Conductivity and Superior Flame Resistance

Optimization of Flexible Nacre-Like Cellulose Nanofiber Films by a Covalent Overlapping Method: Excellent Thermal Conductivity and Superior Flame Resistance

Graphene to Advanced MoS2: A Review of Structure, Synthesis, and Optoelectronic Device Application

Protection mechanism of N,N-dimethylformamide on stability of few-layer black phosphorus

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