Themed collection Graphene

Carbon and graphene quantum dots for biological and sensing applications of neurotransmitters.

Graphene and graphene oxide have attracted tremendous interest over the past decade due to their unique and excellent electronic, optical, mechanical, and chemical properties.

In recent years, two-dimensional atomic-level thickness crystal materials have attracted widespread interest such as graphene, hexagonal boron nitride (h-BN), silicene, germanium, black phosphorus (BP), transition metal sulfides and so on.

In this review article, we describe a general introduction to GO, its synthesis, reduction and some selected frontier applications. Its low cost and potential for mass production make GO a promising building block for functional hybrid materials.

Carbon-based composite electrode materials, including carbon–carbon, carbon–metal oxide, carbon–polymer and carbon–polymer–metal oxide for efficient capacitive deionization are summarized.

High energy and power densities can be achieved for the aqueous asymmetric supercapacitors.

This review summarizes the recent studies on GO structure modeling and its reduction.

This account presents an overview of the synthesis and application of graphene–inorganic nanocomposites.

The use of graphene to enhance the efficiency of photocatalysis has attracted much attention. This review is focused on the recent significant advances in the fabrication and applications of graphene-based hybrid photocatalysts.

In recent times, perovskite solar cells (PSCs) have been of wide interest in solar energy research, which has ushered in a new era for photovoltaic power sources through the incredible enhancement in their power conversion efficiency (PCE).

Perovskite light-emitting diodes (PeLEDs) employing CH₃NH₃PbBr₃ as the emission layer (EML) and graphene oxide (GO) doped PEDOT:PSS as the hole transport layer (HTL) were prepared and characterized.

New functional CS/GA/RGO/Pd composite hydrogels are prepared via a self-assembly process, demonstrating potential applications in catalysis as well as composite materials.

In this study, a novel hierarchical carbon fiber@cobalt ferrite@manganese dioxide (CF@CoFe₂O₄@MnO₂) composite was facilely prepared via a sol–gel method and hydrothermal reaction.

A facile strategy was reported to synthesize highly wrinkled graphene film, exhibiting high packing density and excellent capacitive performance.

The laser ablation of a bulk CoCrFeMnNi high-entropy alloy immersed in liquid yields colloidal nanoparticles with diameters below 5 nm. Both, the chemical composition and the crystal lattice of the bulk material is preserved in the nanoparticles.

Herein, synthetic graphite materials with hierarchical pores and large specific surface area were prepared by one-step impregnation with lignite as the carbon source, H₂SO₄ as the oxidant, and H₃PO₄ as the activator.

The fabrication, characterization, and antibacterial activity of novel nanocomposites based on graphene oxide (GO) nanosheets decorated with silver, titanium dioxide nanoparticles, and zinc oxide nanoflowers were examined.

We report a scalable process of making highly conductive graphene-based glass fibre rovings and their integration into a vacuum infused epoxy–glass fabric composite. We then demonstrate the potential use of as prepared composites for de-icing applications.

Improved performances of optical phased arrays have been achieved assisted by graphene nanoheaters and air trenches.

A simple and straightforward method using microwave-assisted reactions is presented for the functionalization of graphene oxide with aromatic and non-aromatic amines.

We report modification of graphene oxide by thermal reduction to obtain reduced graphene oxide and subsequent functionalization with sulfophenyl groups to obtain SRGO as well as the characterization of these materials by TGA-MS.

Simple spectrophotometric method for the estimation of accessible amino groups and preparation of polyurethane nanocomposites.

Reduced graphene oxide (RGO)–Fe₃O₄ composites with obviously enhanced microwave absorption properties were successfully fabricated by a rational one-pot simplified co-precipitation route, which avoided the usage of an inert gas and any additional chemical agents (such as surfactants and stabilizers).

Ab initio calculations have been performed to study the geometry and electronic structure of boron (B) and nitrogen (N) doped graphene sheets.

N-doped graphene nanosheets (NGS) with nitrogen level as high as 11.36 wt% were synthesized by a facile hydrothermal reduction. Remarkably, the as-prepared NGS exhibit excellent capacitive behaviors, superior cycling stability and coulombic efficiency.

Fe₃O₄/graphene-nanosheets with Fe–O–C bond link between Fe₃O₄ and graphene possesses durable high-rate performance: the reversible capacity attains 550 mAhg⁻¹ at 1 Ag⁻¹, and retention is 97 % after 300 cycles.