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ZnO-nanorods/graphene heterostructure: a direct …

ZnO has a wide band gap about 3.37 eV, and the work function (W) of eigen-state ZnO, graphene and Pt are 5.3 eV 35, 4.42 eV 36 and 5.65 eV 37, respectively. Figure 4a,b show the band structure before and after contact of ZnO-nanorods and graphene film.

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ZnO-nanorods/graphene heterostructure: a direct …

ZnO has a wide band gap about 3.37 eV, and the work function (W) of eigen-state ZnO, graphene and Pt are 5.3 eV 35, 4.42 eV 36 and 5.65 eV 37, respectively. Figure 4a,b show the band structure before and after contact of ZnO-nanorods and graphene film.

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ZnO/Graphene Composites: Synthesis, …

ZnO/graphene composites has been synthesized using a one-pot hydrothermal method at moderate temperature of 90°C. Hydrothermal growth was done in an aqueous solution consisting of 20 mL graphene oxide (GO) solution (0.25 mg/mL) with equimolar of zinc acetate [ZAc, Zn (CH3COO)2·2H2 and hexamethylenetetramine (HMTA, C6H12N4). The as-synthesized composites was characterized by …

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ZnO/Graphene Composites: Synthesis, …

ZnO/graphene composites has been synthesized using a one-pot hydrothermal method at moderate temperature of 90°C. Hydrothermal growth was done in an aqueous solution consisting of 20 mL graphene ...

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ZnO/Graphene Composites: Synthesis, …

ZnO/graphene composites has been synthesized using a one-pot hydrothermal method at moderate temperature of 90°C. Hydrothermal growth was done in an aqueous solution consisting of 20 mL graphene oxide (GO) solution (0.25 mg/mL) with equimolar of zinc acetate [ZAc, Zn (CH3COO)2·2H2 and hexamethylenetetramine (HMTA, C6H12N4). The as-synthesized composites was characterized by …

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ZnO/Graphene Composites: Synthesis, …

ZnO/graphene composites has been synthesized using a one-pot hydrothermal method at moderate temperature of 90°C. Hydrothermal growth was done in an aqueous solution consisting of 20 mL graphene ...

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Nanomaterials | Free Full-Text | Graphene Oxide ...

In this work, the effects of graphene oxide (GO) concentrations (1.5 wt.%, 2.5 wt.%, and 5 wt.%) on the structural, morphological, optical, and luminescence properties of zinc oxide nanorods (ZnO NRs)/GO nanocomposites, synthesized by a facile hydrothermal process, were investigated. X-ray diffraction (XRD) patterns of NRs revealed the hexagonal wurtzite structure for all composites with an ...

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A Review of the Synthesis and Photoluminescence …

2.2. ZnO-Graphene Synthesis. For the synthesis of reduced graphene oxide (rGO) ZnO nanocomposites, the first step involves the reduction of the graphene oxide (GO) with hydrazine also known as one-step reduction process. When followed by thermal annealing on a quartz substrate, it is known as a two-step reduction process .

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A Review of the Synthesis and Photoluminescence …

2.2. ZnO-Graphene Synthesis. For the synthesis of reduced graphene oxide (rGO) ZnO nanocomposites, the first step involves the reduction of the graphene oxide (GO) with hydrazine also known as one-step reduction process. When followed by thermal annealing on a quartz substrate, it is known as a two-step reduction process .

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Anodic ZnO-Graphene Composite Materials in Lithium ...

An important area to cope with in the implementation of technologies for the generation of energy from renewable sources is storage, so it is a priority to develop new ways of storing energy with high efficiency and storage capacity. Experimental reports focused on ZnO-graphene composite materials applied to the anode design which indicated that they show low efficiencies of around 50 %, but ...

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Facile Synthesis of ZnO–Reduced Graphene Oxide ...

The reduction of graphene oxide by hydrazine hydrate and the decoration of the graphene surface by ZnO nanoparticles have occurred during the synthesis process. The prepared samples were characterized by various microscopic techniques to explore the surface morphology and uniformity. Spectroscopic techniques were used to investigate the quality ...

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Graphene/ZnO nanocomposite with seamless …

The interface of graphene (G) and oxide can significantly influence the properties and/or applications of the binary system. However, it is usually beyond controllability during the conventional physical intermixing and/or solvothermal preparations. In this article, by directly growing nanocrystalline graphene films on the ZnO nanocrystals through a medium-temperature chemical vapor deposition ...

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Graphene nanomesh by ZnO nanorod photocatalysts

Local photodegradation of graphene oxide sheets at the tip of ZnO nanorods was used to achieve semiconducting graphene nanomeshes. The chemically exfoliated graphene oxide sheets, with a thickness of approximately 0.9 nm, were deposited on quartz substrates. Vertically aligned ZnO …

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Synthesis and Characterization of Graphene …

In this study, graphene oxide/zinc oxide (GO/ZnO) nanocomposite was prepared by the decoration of thermally expanded and chemically oxidized graphite oxide nanosheets with zinc oxide (ZnO) nanoparticles synthesized via two‐step sol‐gel deposition method and used as an effective photocatalyst for degradation of basic fuchsin (BF) dye.

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High-performance solid-state supercapacitors based …

2013-11-12 · In this paper, we report a facile low-cost synthesis of the graphene-ZnO hybrid nanocomposites for solid-state supercapacitors. Structural analysis revealed a homogeneous distribution of ZnO nanorods that are inserted in graphene nanosheets, forming a sandwiched architecture. The material exhibited a high specific capacitance of 156 F g−1 at a scan rate of 5 mV.s−1.

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Graphene/ZnO nanocomposite with seamless …

The interface of graphene (G) and oxide can significantly influence the properties and/or applications of the binary system. However, it is usually beyond controllability during the conventional physical intermixing and/or solvothermal preparations. In this article, by directly growing nanocrystalline graphene films on the ZnO nanocrystals through a medium-temperature chemical vapor deposition ...

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Transferable GaN Layers Grown on ZnO-Coated …

As previously reported , ZnO nanowalls are grown along naturally formed graphene step-edges, and accordingly, step-edges generated by oxygen-plasma lead to the formation of high-density ZnO nanowalls. Because of the same crystal structure and small lattice misfits with GaN, epitaxial GaN films grow on the nanowalls by means of lateral overgrowth.

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Novel ZnO tetrapod-reduced graphene oxide …

1daysbefore · Abstract In the present work, a bunch of ZnO tetrapod-reduced graphene oxide (ZTPG) nanocomposites (NCs) were synthesized via a simple and economical in-situ approach using high temperature refluxing method. The phase purity, morphology, optical and photocatalytic properties of NCs were studied comprehensively. Various weight percentage of rGO were proposed for efficient …

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Polyol Synthesis of Zinc Oxide-Graphene Composites ...

2020-11-7 · The ZnO-G composites exhibit significantly enhanced photoluminescence, which is ~ 8 times stronger than that of ZnO samples. Such improved optical property is attributed to the contribution of plasmonic effect of graphene in ZnO-G.

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Graphene nanomesh by ZnO nanorod photocatalysts

Local photodegradation of graphene oxide sheets at the tip of ZnO nanorods was used to achieve semiconducting graphene nanomeshes. The chemically exfoliated graphene oxide sheets, with a thickness of approximately 0.9 nm, were deposited on quartz substrates. Vertically aligned ZnO …

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Microwave Synthesis of Zinc Oxide/Reduced …

This work reports on synthesis of zinc oxide/reduced graphene oxide (ZnO/rGO) nanocomposites in the presence of diethylenetriamine (DETA) via a facile microwave method. The X-ray diffraction (XRD) patterns of the nanocomposites correspond to the ZnO hexagonal phase wurtzite structure. The high-resolution transmission electron microscopy (HRTEM) images revealed that the ZnO nanorods, with …