Cost effective hydrogen evolution reaction (HER) catalyst without using precious metallic elements is a crucial demand for environment-benign energy production. Molybdenum sulfide one of the promising candidates such purpose, particularly in acidic condition, but its catalytic performance inherently limited by sparse edge sites and poor electrical conductivity. We report synthesis HER catalysis hybrid catalysts composed amorphous molybdenum (MoSx) layer directly bound at vertical N-doped...

Outstanding pristine properties of carbon nanotubes and graphene have limited the scope for real‐life applications without precise controllability material structures properties. This invited article to celebrate 25 th anniversary Advanced Materials reviews current research status in chemical modification/doping their relevant with optimized A broad aspect specific correlations between schemes graphitic carbons novel tunable is summarized. An overview practical benefits from...

Substitutional heteroatom doping is a promising route to modulate the outstanding material properties of carbon nanotubes and graphene for customized applications. Recently, (nitrogen-) N-doping has been introduced ensure tunable work-function, enhanced n-type carrier concentration, diminished surface energy, manageable polarization. Along with assessment effects, research on N-doped based composite structures emerging synergistic integration various functional materials. This invited...

We report the synthesis of a Fe-porphyrin-like carbon nanotube from conventional plasma-enhanced chemical vapor deposition. Covalent but seamless incorporation 5-6-5-6 porphyrinic Fe-N(4) moiety into graphene hexagonal side wall was elucidated by x-ray and ultraviolet photoemission spectroscopies first-principles electronic structure calculations. The resulting biomimetic exhibits an excellent oxygen reduction catalytic activity with extreme structural stability over 0.1×10(6) cycles, vastly...

Substitutional N‐doping of carbon nanomaterials refers to the chemical functionalization method that replaces a part atoms in fullerene, nanotubes, or graphene by nitrogen. has attracted tremendous amount research attention for their unique possibilities, spanning from its ability engineer various physiochemical properties stable manner with different dopant configurations. Many viable configurations N‐dopants are accompanied typical structural defects, while still preserving symmetry basal...

Abstract This Feature Article reviews recent progress in the tailored assembly of carbon nanotubes and graphene into three‐dimensional architectures with particular emphasis on our own research employing self‐assembly principles. Carbon can be assembled macroporous films, hollow spherical capsules, or nanotubes, via directed from solvent dispersion. approach is cost‐effective beneficial for large‐scale assembly, but pre‐requests stable dispersion a medium. Directed growth nanopatterned...

We report an efficient and environmentally benign biomimetic mineralization of TiO(2) at the graphitic carbon surface, which successfully created ideal TiO(2)/carbon hybrid structure without any harsh surface treatment or interfacial adhesive layer. The N-doped sites nanotubes (CNTs) nucleated high-yield deposition a uniformly thick nanoshell in neutral pH aqueous media ambient pressure temperature generated CNT (NCNT)/TiO(2) core/shell nanowires. Unlike previously known organic...

We prepared vertically aligned nitrogen doped carbon nanotubes (CNTs) on a rigid glass substrate or flexible plastic via 'growth-detachment-transfer' process and the N-doped CNT arrays are employed as counter electrodes for novel dye-sensitized solar cells.

N-doped sites at CNT and graphene trigger spontaneous encapsulation of Si particles by simple pH control room temperature. Significantly, encapsulated composite electrode materials show remarkable cycle life rate performance in battery operations. Superior capacity retention 79.4% is obtained after 200 cycles excellent capability 914 mA h g−1 observed a 10 C rate.

The mechanical properties of rodlike cellulose nanocrystals (CNCs) suggest great potential as bioderived reinforcement in (nano)composites. Poly(vinyl alcohol) (PVOH) is a useful industrial material and very compatible with CNC chemistry. High performance CNC/PVOH composite fibers were produced coaxial coagulation spinning, followed by hot-drawing. We showed that CNCs increase the alignment crystallinity PVOH, well providing direct reinforcement, leading to enhanced fiber strength stiffness....

We report a remarkably rapid method for assembling pristine graphene platelets into large area transparent film at liquid surface. Some 2-3 layer temporally solvated with N-methyl-2-pyrrolidone (NMP) are assembled the surface of dilute aqueous suspension using an evaporation-driven Rayleigh-Taylor instability and then driven together by Marangoni forces. The fixed through physical binding their edges. Typically, 8-cm-diameter circular films generated within two minutes. Once formed, can be...

Highly aligned GO gel fibers are fabricated under high extensional flow for efficient nanofluidic transport of ion species.

Fiber nanomaterials can become fundamental devices that be woven into smart textiles, for example, miniaturized fiber-based supercapacitors (FSCs). They utilized portable, wearable electronics and energy storage devices, which are highly prospective areas of research in the future. Herein, we developed porous carbon nanotube–graphene hybrid fibers (CNT–GFs) all-solid-state symmetric FSCs, were assembled through wet-spinning followed by a hydrothermal activation process using environmentally...

Abstract Two-dimensional (2D) Janus transition metal dichalcogenides (TMDCs) are highly attractive as an emerging class of 2D materials, but only a few methods available for fabricating them. These rely on the initial growth TMDCs in one process, followed by additional plasma or high-temperature (T) process. To overcome these drawbacks, we employ new approach NaCl-assisted single-process chemical vapor deposition, which consists three steps that proceed altering temperature situ. In first...

Electrochemical oxygen redox reactions are the crucial elements for energy conversion and storage including fuel cells metal air batteries. Despite tremendous research efforts, developing high-efficient, low-cost, durable bifunctional catalysts remains a major challenge. We report new class of hybrid material consisting subnanometer thick amorphous cobalt hydroxide anchored on NCNT as ORR/OER catalyst. Although species-based known good OER catalysts, hybridizing with successfully enhanced...

Abstract High torsional strength fibers are of practical interest for applications such as artificial muscles, electric generators, and actuators. Herein, we maximize by understanding, measuring, overcoming rheological thresholds nanocarbon (nanotube/graphene oxide) dopes. The formed show enhanced structure across multiple length scales, modified hierarchy, improved mechanical properties. In particular, the properties were examined, with high shear (914 MPa) attributed to nanotubes but...

Compartmental shielding, using methods such as the conductive encapsulation of flexible polymer fibers, provides electrical pathways that are effective for electromagnetic interference (EMI) shielding in textile-based EMI shields. However, controlling skin depth with electrically insulating constituents remains challenging, particularly by requiring high conductivity encapsulants on surface. Here, we demonstrate highly single-walled carbon nanotube (SWCNT) polyelectrolytes provide a certain...

Abstract Graphene oxide (GO), which is an oxidized form of graphene, has a mixed structure consisting graphitic crystallites sp 2 hybridized carbon and amorphous regions. In this work, we present straightforward route for preparing graphene-based quantum dots (GQDs) by extraction the from matrix GO sheets. GQDs with controlled functionality are readily prepared varying reaction temperature, results in precise tunability their optical properties. Here, it was concluded that tunable properties...

Abstract Solid‐state electrolytes (SSEs) offer enhanced safety, extended cycle life, and increased energy density when replacing flammable liquid in lithium‐ion batteries. Poly(ethylene oxide) (PEO)‐based SSE is the only candidate that has been commercially implemented electric vehicles. However, equipped battery needs to operate at temperatures above 50 °C, its phase transitions room temperature are still unclear. Herein, solidification of PEO‐lithium bis(trifluoromethanesulfonyl)imide (PEO...

We present a facile and versatile directed assembly process for highly entangled carbon nanotube (CNT) scaffolds. Macroporous polymer/CNT nanocomposites were prepared by 'breath figure' method. After pyrolysis of the nanocomposites, stable CNT scaffolds with diverse morphologies such as monolayered or multilayered cellular films individual rings prepared. The demonstrated high electrical conductivity field-emission properties, which is potentially useful various applications in electronics...

Abstract Polymer grafting from graphitic carbon materials has been pursued for several decades. Unfortunately, currently available methods mostly rely on the harsh chemical treatment of carbons which causes severe degradation structure and material properties. A straightforward growth polyaniline chain nitrogen (N)‐doped sites nanotubes (CNTs) is presented. N‐doping along CNT wall nucleate polymerization aniline, generates seamless hybrids consisting directly grafted onto walls. The...