Leaf-Inspired Hetero-Structure WS/WO In Situ Embedded on Pomelo Peel Derived Carbon for Supercapacitor and Capacitive Deionization.

Composite materials have occupied a reliable position in electrochemical energy storage and conversion due to their double electric layer and pseudocapacitance. In this work, a leaf-like heterostructure composite, obtained by peeling - carbonizing - in situ sulfuration/oxidation approach for the first time, is investigated as electrode material for electrochemical capacitance behavior. The thin and highly active transition metal WS acts as an energetic "blade" to trap free ions, which are then transported across the material through a strong "tendon skeleton" WO.

Oxygen-Deficient FeNbO In-Situ Growth in Honey-Derived N-Doping Porous Carbon for Overall Water Splitting.

It is still a great challenge to reasonably design green, low cost, high activity and good stability catalysts for overall water splitting (OWS). Here, we introduce a novel catalyst with ferric niobate (FeNbO) in-situ growing in honey-derived porous carbon of high specific surface area, and its catalytic activity is further enhanced by micro-regulation (oxygen vacancy and N-doping). From the experimental results and density functional theory (DFT) calculations, the oxygen vacancy in catalyst FeNbO@NC regulates the local charge density of active site, thus increasing conductivity and optimizing hydrogen/oxygen species adsorption energy.

Composite capillary carbon tube NbWOas advanced anode material for aqueous ion capacitors.

Niobium-tungsten bimetal oxides have received wide attention due to their excellent lattice properties. In this work, NbWO(NbWO) with a tetragonal tungsten bronze structure was synthesized by simple hydrothermal method. NbWO was modified to provide high specific surface area via combining with hollow carbon nanotubes.

A Fe(SO)-assisted approach towards green synthesis of cuttlefish ink-derived carbon nanospheres for high-performance supercapacitors.

The conversion of renewable biomass resources into advanced electrode materials through green, simple, and economical methods has become an important research direction in energy storage. In this study, Fe-decorated N/S-codoped porous carbon nanospheres have been successfully fabricated from cuttlefish ink through Fe(SO)-assisted hydrothermal carbonization coupled with heat treatment. The effects of Fe(SO) dosage on the structure, chemical composition, and capacitive property of carbon nanospheres were investigated.

Porous biscuit-like nanoplate FeNbO@C for lithium-ion storage and oxygen evolution.

The development of efficient and stable electrode materials for lithium-ion batteries (LIBs) and the oxygen evolution reaction (OER) is critical for clean and sustainable energy storage and conversion. In this work, porous biscuit-like nanoplate FeNbO@C is reasonably prepared by morphology control and microstructure modification, and presents many advantages in LIBs and the OER. In particular, FeNbO@C displays a large specific surface area, abundant active sites and a significant edge effect, thus improving the Li reactivity and OER kinetics.

N,S co-doped VNbO@C fibers used for lithium-ion storage.

Bimetallic oxides deliver high specific capacity in energy storage, but their disadvantages, such as poor electrical conductivity, low ion diffusion rate and interatomic instability, limit their application. In this work, lattice defects (N,S co-doping) and carbon interfaces are introduced into S-VNbO@NC nanofibers to improve the electron/ion kinetic stability, electrical conductivity and electrochemical activity. Firstly, the lattice defects constructed by N,S co-doping produce more unmatched electrons, widen the lattice channels of S-VNbO@NC, provide more active sites, improve the material affinity to the electrolyte and enhance its electron/ion transport kinetics.

Multidefect N-Nb O @CNTs Incorporated into Capillary Transport Framework for Li /Na Storage.

As an ion-embedded material with small strain and low transport energy barrier, the limited ion transport rate and conductivity of niobium pentaoxide (Nb O ) are the main factors limiting its application in lithium/sodium storage systems. In this work, the microsphere composites (N-Nb O @CNTs) are prepared by combining Nb O , rich in nitrogen doping and vacancy defects, with carbon nanotubes (CNTs) penetrating the bulk phase. With the capillary effect, CNTs can enable the rapid electrolyte infiltration into the microspheres, thus shorting the Li /Na transport path.

Ultrafast and stable ion/electron transport of MnNbO in LIC/SC via interface protection and lattice defects.

Interface protection and kinetics optimization could effectively relieve the shortcomings of bimetallic oxides, such as low conductivity, strong hydrophobicity, insufficient ion diffusion rate and metal interatomic instability. In this work, ultrathin amorphous carbon shells and lattice defects (heteroatoms and vacancies) are introduced into the MnNbO nanofiber surface to improve the electron/ion kinetic stability, conductivity and electrochemical activity. The ultrathin carbon interface protects unstable lattice with defects, thus restraining the adverse reaction between bimetallic oxides and electrolyte.

Self-Lubricating Supramolecular Hydrogel for In-Depth Profile Control in Fractured Reservoirs.

In-depth profile control is a great challenge for high-efficiency oil displacement by water flooding. In this work, a shear-responsive self-lubricating hydrogel FPP-0.5, by combining the thixotropic FT (-fluorenylmethoxycarbonyl-l-tryptophan) supramolecular network with high-strength PAM-PAANa (PAM: polyacrylamide, PAANa: sodium polyacrylate) polymer network, was synthesized and applied for in-depth profile control in water flooding.

Giant surfactant-stabilized N-foam for enhanced oil recovery after water flooding.

A novel giant surfactant, APOSS-PS, possessing good surface activity, and viscosifying and reinforcing ability as a foam stabilizer, was synthesized successfully to enhance the physical properties of foaming solutions and foam. APOSS-PS was widely distributed at the foam gas-liquid interface and adjacent liquid layers through diffusion and adsorption, obviously decreasing the surface tension and improving the foamability and stability of the foam. Furthermore, the aggregation of APOSS-PS in the foam films resulted in the formation of a self-assembled nano-sized network through supramolecular interactions (such as hydrogen bonding, π-π stacking, and van der Waals attraction), thus increasing the foam viscoelasticity, including its interfacial viscoelastic modulus and apparent viscosity.

Nitrogen self-doped porous carbon with layered structure derived from porcine bladders for high-performance supercapacitors.

Nitrogen-doped layered porous carbon has been successfully fabricated from the biomass of porcine bladders via carbonization and KOH activation. The effects of KOH dosage on the structure, composition and capacitive property of carbon were investigated by a variety of means (SEM, HRTEM, XRD, Raman, XPS, BET and electrochemical test). Owing to the unique layered structure and rich heteroatom content of porcine bladders, the sample obtained at a KOH/carbon mass ratio of 2 were endowed with appropriate pore structure, large specific surface area (1881.

Novel Smart Polymer-Brush-Modified Magnetic Graphene Oxide for Highly Efficient Chiral Recognition and Enantioseparation of Tryptophan Enantiomers.

Multifunctional graphene oxide nanocomposites simultaneously possessing high enantioselectivity, excellent thermosensitivity, and magnetism demonstrate great application potentials in direct enantioseparation. We herein report one novel smart graphene oxide nanocomposite (MGO@PNG-CD) with high enantioselectivity, excellent thermosensitivity, and magnetism for highly efficient chiral identification and enantioseparation of tryptophan enantiomers. The MGO@PNG-CD is composed of graphene oxide nanosheets with immobilized superparamagnetic FeO nanoparticles and grafted PNG-CD smart polymer brushes.

Construction of a non-enzymatic glucose sensor based on copolymer P4VP-co-PAN and Fe2O3 nanoparticles.

An electrochemical sensor based on a copolymer poly(4-vinylpyridine)-co-poly(acrylonitrile), P4VP-co-PAN, and Fe2O3 nanoparticle film modified glassy carbon electrode was developed for the determination of glucose. We studied the response of glucose with the proposed electrode, and determined the optimum conditions by changing the potential, pH and P4VP-co-PAN. The current response measurements were performed in PBS (c=0.