Oxygen density dependent band gap of reduced graphene oxide

Huang, Haiming; Li, Zhibing; She, Juncong; Wang, Weiliang

doi:10.1063/1.3694665

Cited by 177 publications

(122 citation statements)

References 39 publications

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“…The observed effects can be explained by transitions between states being far from the Fermi level, possibly interband transitions or states formed by functional groups of oxygen. As is known, recovery of the GO is accompanied by the departure of the various functional groups of oxygen, which can lead both to decrease the band gap [17], and the transformation of defect-impurity structure [1]. Low-temperature dependences of resistance on the temperature are different from the linear one (the inset of Fig.…”

Section: Discussionmentioning

confidence: 98%

Study of Electrical Conductivity of Thermally Reduced Graphene Oxide

Neustroev¹,

Nogovitsyna²,

Solovyova³

et al. 2015

RENSIT

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Section: Discussionmentioning

confidence: 98%

Study of Electrical Conductivity of Thermally Reduced Graphene Oxide

Neustroev¹,

Nogovitsyna²,

Solovyova³

et al. 2015

RENSIT

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“…Low bandgap of 1.3 eV suggest that GO should produce high yield of solar fuel. Huang et al reported that bandgap energy of GO can be tuned from 2.7 to 1.15 eV depending on density of oxygen functional groups [44]. Thus, Low bandgap energy GO could be efficient photocatalyst for CO2 reduction to solar fuel under visible light irradiation.…”

Section: Uv-vis Spectroscopymentioning

confidence: 99%

Graphene Oxide as An Efficient Photocatalyst For Photocatalytic Reduction of CO2 Into Solar Fuel

Shehzad¹,

Johari²,

Murugesan³

et al. 2018

INT. J. AUTOMOT. MECH. ENG.

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Photocatalytic reduction of CO2 into solar fuel such as methane and methanol, is an attractive approach to simultaneously solve the energy crisis and global warming problem. Herein, comparative photocatalytic activity of graphene oxide nanosheets have been investigated for photocatalytic reduction of CO2 into methane and methanol in continuous gas and liquid phase photoreactor system. The graphene oxide sheets were prepared according to Tour's method. The chemical composition and optical properties was evaluated through XPS and UV-vis spectroscopy. Graphene oxide nanosheets exhibited maximum amount of 224.87 μmol/g.h methanol and 14.8 μmol/g.h methane in liquid and gas phase system, respectively. Higher yield of methanol in liquid phase compared to methane in gaseous system can be attributed to dispersion of graphene oxide sheets in water. Hence, graphene oxide nanosheets are efficient photocatalyst for CO2 reduction into methanol. Nevertheless, further research is essential to improve the photostability of graphene oxide sheets for real application of photocatalytic CO2 reduction.

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“…Up to now, a number of approaches have been tried to remedy the zero band gap problem, including bilayer graphene stacking, formation of graphene nanoribbons or graphene antidot lattices, via hetero atom doping, and chemical modification. [12][13][14][15][16][17][18][19][20][21][22][23][24][25] For instance, hybridized h-BNC structures have been synthesized and have a band gap around 18 meV. 19 A gap of ∼0.26 eV can also be produced when graphene is epitaxially grown on a SiC substrate.…”

Section: Introductionmentioning

confidence: 99%

Modulation of Dirac points and band-gaps in graphene via periodic fullerene adsorption

et al. 2013

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The structural, energetic and electronic properties of periodic graphene nanobud (PGNB) with small-diameter fullerenes (C20, C34, C42, and C60) adsorbed have been investigated by first-principles plane wave method. The bond-to-ring cycloaddition is found to be energetically most stable among various configurations and the minimum energy paths of different-sized fullerenes attaching to graphene indicate that smaller fullerene shows lower energy barriers due to its larger surface curvature. For perfectly ordered adsorption, band structures analyses by both density functional theory (DFT) and tight binding (TB) methods show that the Dirac cone of graphene can be generally preserved despite the sp2 to sp3 bond hybridization change for selected carbon atoms in graphene sheet. However, the position of the Dirac points inside the Brillouin zone has a shift from the hexagonal corner and can be effectively modulated by changing the fullerenes’ concentration. For practical applications, we show that a considerable band gap (∼0.35 eV) can be opened by inducing randomness in the orientation of the fullerene adsorption and an effective order parameter is identified that correlates well with the magnitude of the band gap opening

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Oxygen density dependent band gap of reduced graphene oxide

Cited by 177 publications

References 39 publications

Study of Electrical Conductivity of Thermally Reduced Graphene Oxide

Study of Electrical Conductivity of Thermally Reduced Graphene Oxide

Graphene Oxide as An Efficient Photocatalyst For Photocatalytic Reduction of CO2 Into Solar Fuel

Modulation of Dirac points and band-gaps in graphene via periodic fullerene adsorption

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