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Review of the role of ionic liquids in two-dimensional materials

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Abstract

Ionic liquids (ILs) are expected to be used as readily available “designer” solvents, characterized by a number of tunable properties that can be obtained by modulating anion and cation combinations and ion chain lengths. Among them, its high ionicity is outstanding in the preparation and property modulation of two-dimensional (2D) materials. In this review, we mainly focus on the ILs-assisted exfoliation of 2D materials towards large-scale as well as functionalization. Meanwhile, electric-field controlled ILs-gating of 2D material systems have shown novel electronic, magnetic, optical and superconducting properties, attracting a broad range of scientific research activities. Moreover, ILs have also been extensively applied in various field practically. We summarize the recent developments of ILs modified 2D material systems from the electrochemical, solar cells and photocatalysis aspects, discuss their advantages and possibilities as “designer solvent”. It is believed that the design of ILs accompanying with diverse 2D materials will not only solve several scientific problems but also enrich materials design and engineer of 2D materials.

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Abbreviations

[BMIM]:

1-butyl-3-methylimidazolium

[EMIM]:

1-ethyl-3-methylimidazolium

[PF6]:

hexafluorophosphate

[BF4]:

tetrafluoroborate

[TFSI] or [NTf2]:

bis(trifluoromethylsulfonyl) imide

ILs:

Ionic liquids

2D materials:

two-dimensional materials

TMDs:

transition metal dichalcogenide

MoS2 :

molybdenum disulfide

MoSe2 :

Molybdenum(IV) selenide

MoTe2 :

Molybdenum Ditelluride

WS2 :

Tungsten disulfide

WSe2 :

Tungsten(IV) selenide

ReS2 :

Rhenium Disulfide

TaS2 :

tantalum disulfide

NMDs:

noble metal dichalcogenides

PdSe2 :

Palladium diselenide

PtSe2 :

Platina Diselenide

PtS2 :

Platinum disulfide

h-BN:

hexanol boron nitride

BP:

black phosphorus

LDHs:

layered double hydroxide

g-C3N4 :

graphite carbon nitrides

MOFs:

metal-organic frameworks

COFs:

covalent-organic frameworks

LPE:

liquid phase exfoliation

NMP:

N-methylpyrrolidone

N12P:

1-dodecyl-2-pyrrolidone

(P[VBTP][Cl]):

poly(triphenyl-4-vinylbenzylphosphonium chloride)

(P[VimBu][Br]):

poly(3-N-butyl-1-vinylimidazolium bromide)

(PNIL):

(poly(N-isopropylacrylamide-co-IL)

FG:

fluorinated graphene

EDLTs:

electrical double-layer transistors

FETs:

field-effect transistors

CNT:

carbon nanotubes

SS:

subthreshold swing

CDW:

charge-density-wave

Cr2Ge2Te6 :

Chromium germanium tellurium

m-CTF:

microporous covalent triazine structure

rGO:

reduced graphene oxide

aMEGO:

activated microwave exfoliated graphene oxide

GNS:

2D graphene nanosheets

GO:

graphite oxide

(EMI-TFSI):

1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide

Ti3C2Tx :

Titanium carbide

MSCs:

micro-supercapacitors

AA-Ti3C2 :

AA-cation-intercalated Ti3C2Tx

EMIM-TFSI:

1-ethly-3-methylimidazolium bis-(trifluoromethylsulfonyl)-imide

DMIM:

1,3-dimethyl-3-imidazolium

Cs0.08FA0.92PbI3 :

formamidinium-cesium lead iodide perovskite

[Hnmp]Cl:

[N-methyl-pyrrolidonium] chloride

Bi2O2CO3 :

Bismuth subcarbonate

Bi2Se3 :

bismuth selenide

[C16mim]Br:

1-hexadecyl-3-methylimidazole bromide

Bi2MoO6 :

Bismuth molybdenum oxide

Bi2WO6 :

Bismuth tungstate

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Acknowledgements

This work was supported by the Natural Science Foundation of Fujian Province of China (No. 2022J01007), the Fundamental Research Funds for Central Universities (Grant No. 20720210018), and the National Natural Science Foundation of China (No. 11704317).

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  1. Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education; Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, and Department of Physics, Xiamen University, Xiamen, 361005, China

    Na Sa, Meng Wu & Hui-Qiong Wang

  2. Department of Physics, and Department of New Energy Science and Engineering, Xiamen University Malaysia, Sepang, 43900, Malaysia

    Hui-Qiong Wang

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  1. Na Sa
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Correspondence to Meng Wu or Hui-Qiong Wang.

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Sa, N., Wu, M. & Wang, HQ. Review of the role of ionic liquids in two-dimensional materials. Front. Phys. 18, 43601 (2023). https://doi.org/10.1007/s11467-023-1258-6

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