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Publications (30)
Crystal structures determine material properties, suggesting that crystal phase transformations have the potential for application in a variety of systems and devices. Phase transitions are more likely to occur in smaller crystals; however, in quantum‐sized semiconductor nanocrystals, the microscopic mechanisms by which phase transitions occur are...
This review presents a brief scenario about the development of cathodes, anodes, and electrolytes for the next generation of Li-ion batteries (LIBs) and supercapacitors for future energy technologies. Specific capacity and power density are two prime requirements for energy storage devices, mainly decided by the microstructure and compositions of e...
Searching for low-cost and highly active bifunctional electrocatalysts toward hydrogen/oxygen evolution reactions is a grand challenge for water splitting hydrogen production. Herein, we prepare a trimetallic nickel, iron, and molybdenum...
Nitrogen (N)-doped carbon is widely used as an anode material for Li-ion battery (LIB). However, the identification of a specific type of N-configuration responsible for Li-ion storage in N-doped carbon is an elusive topic for LIB. Herein, the N-doped porous carbon nanofibers (N-pCNFs) with various atomic percentages of N and different types of N-c...
Metal oxynitrides have been considered recently as emerging electrode materials for supercapacitors. Herein, we converted titanate nanotubes into a series of titanium oxynitride (TiON) nanorods at nitridation temperatures of 800, 900, and 1000 °C in ammonia gas and tested them as supercapacitor electrodes. TiON-800, TiON-900, and TiON-1000 showed c...
Using graphene oxide (GO) and titanium dioxide (TiO2), various types of composites comprised of graphene-bonded and grafted anatase TiO2 were synthesized without employing a cross-linking reagent in this study. Graphene sheets were uniformly dispersed among the TiO2 particles, to enhance the cyclability and electronic conductivity of the TiO2 anode...
Carbon capsules with mesoporous wall and hollow interior were used to fabricate the sensing thin films for volatile aromatic vapors. To grow the thin film based on convenient layer-by-layer (LbL) process, carbon capsules need precoating with surfactants to assist their dispersion into aqueous solution. The influence of the surface covered surfactan...
Photoactivity of graphitic carbon nitride (g-C3N4) is seriously restricted by high recombination rate of photoinduced charge carriers. Herein, a g-C3N4/conjugated polyene (CP) complex is synthesized for the first time via a simple low-temperature calcination process. Lower photoluminescence intensity, longer fluorescence lifetimes, and higher photo...
Herein, a smart strategy is proposed to tailor unique interwoven nanocable architecture consisting of MnCoO
x
nanoparticles embedded in one-dimensional (1D) mesoporous N-doped carbon nanofibers (NCNFs) by using electrospinning technique. The as-prepared network mat of N-doped carbon nanofibers with embedded MnCoO
x
nanoparticles (MnCoO
x
@NCNFs)...
Visible light-induced degradation of gas-phase acetaldehyde (CH3CHO) is investigated using O-deficient reduced TiO2−x-loaded carbon paper. The carbon paper is synthesized by the pyrolysis of a filter paper, and the reduced TiO2−x is prepared by the magnesiothermic reduction of commercial anatase TiO2. The surface areas of the non-carbonized filter...
Herein, we report the development of hydrogenated MoS2 QDs- TiO2 (HMT) heterojunction as an efficient photocatalytic system via one-pot hydrothermal reaction followed by hydrogenation. Synthetic strategy facilitates the formation of MoS2 QDs with enhanced band gap and its proper heterojunction with TiO2, which accelerates the fast charge transfer a...
An innovative spongy nanographene (SG) shell for a silicon substrate was prepared by low-temperature chemical vapor deposition on a hierarchical nickel nanotemplate. The SG-functionalized silicon (Si@SG) composite shows outstanding properties, which may be helpful to overcome issues affecting current silicon anodes used in lithium ion batteries suc...
Despite extensive study on single-layer layered double hydroxides (SL-LDHs) with NO3− counterions, SL-LDHs with CO32− counterions (CO32− SL-LDHs) have never been prepared before. Herein, a CoAl-CO32− SL-LDH which stays stable in water and powdery state is firstly synthesized using ethylene glycol as a reaction medium. The SL-LDH, with thickness of...
Proton exchange membrane fuel cells have been promoted due to improved breakthrough and increased commercialization. The assembly pressure put on a single cell and a fuel cell stack has important influence on the geometric deformation of the gas diffusion layers (GDLs) resulting in a change in porosity, permeability, and the resistance for heat and...
Porous carbons were prepared from a metal-organic framework (MOF, named ZIF-8), with or without modification, via high temperature pyrolysis. Porous carbons with high nitrogen content were obtained from the calcination of MOF after introducing an ionic liquid (IL) (IL@MOF) via the ship-in-bottle method. The MOF-derived carbons (MDCs) and IL@MOF-der...
Objective:
To establish a digital workflow in the treatment of mandibular condylar osteochondroma with secondary dentofacial deformities using navigation and endoscope combined with orthognathic surgery.Methods:Thirty-six patients with unilateral condylar osteochondroma were analyzed retrospectively. Preoperative planning and simulation were carrie...
Bio-inspired non-precious-metal catalysts based on iron and cobalt porphyrins are promising alternatives to replace costly platinum-based catalysts for oxygen reduction reaction (ORR) in fuel cells. However, the exact nature of the active sites is still not clearly understood, and further optimization design is needed for practical applications. He...
Nanostructured NiCo2 O4 is directly grown on the surface of three-dimensional graphene-coated nickel foam (3D-GNF) by a facile electrodeposition technique and subsequent annealing. The resulting NiCo2 O4 possesses a distinct flower or sheet morphology, tuned by potential or current variation electrodeposition, which are used as binder-free lithium-...
The mystery of the bio-inspired non-precious-metal catalyst, based on metal-porphyrin-like moieties, is unraveled by combining first principles calculation and experiment. Square-pyramid FeN5 and square-planar CoN4 moieties are proved to surpass the catalytic activity on Pt (111) surface.
Disclosed is a method for preparing a platinum/support catalyst or a platinum alloy/support catalyst, including: a) preparing a dispersion solution including urea, a support and a water-soluble salt of at least one metal(s) having catalytic activity; (b) reacting the dispersion solution at high temperature so as to deposit the metal hydroxide parti...
Disclosed are a method for recycling silica waste and a method for preparing nanoporous material and other valuable silica materials. More specifically, a method for preparing a nanoporous material by recycling silica-containing waste produced from a silica etching process in the synthesis of nanoporous carbon is provided. The present disclosure al...
