A5019499247- Rare-earth and actinide compounds
- High-pressure geophysics and materials
- Iron-based superconductors research
- Superconductivity in MgB2 and Alloys
- Hydrogen Storage and Materials
- Boron and Carbon Nanomaterials Research
- Carbon Nanotubes in Composites
- Crystallography and molecular interactions
- Advanced Chemical Physics Studies
- Inorganic Chemistry and Materials
- Machine Learning in Materials Science
- Additive Manufacturing and 3D Printing Technologies
- Metal and Thin Film Mechanics
- Diamond and Carbon-based Materials Research
- Laser-induced spectroscopy and plasma
- Topological Materials and Phenomena
- Covalent Organic Framework Applications
- GaN-based semiconductor devices and materials
- Graphene research and applications
- Synthesis and Properties of Aromatic Compounds
- Electrocatalysts for Energy Conversion
- Laser-Plasma Interactions and Diagnostics
- Polymer crystallization and properties
- Tribology and Wear Analysis
- Energetic Materials and Combustion
Center for High Pressure Science and Technology Advanced Research
2021-2025
China Academy of Engineering Physics
2022
Wuhan University
2022
Jilin University
2008-2022
State Key Laboratory of Superhard Materials
2018-2022
Queensland University of Technology
2020-2021
Guizhou University of Finance and Economics
2020
Guangdong University of Petrochemical Technology
2013
The recent discovery of superconductive rare earth and actinide superhydrides has ushered in a new era superconductivity research at high pressures. This distinct type clathrate metal hydrides was first proposed for alkaline-earth-metal hydride CaH_{6} that, however, long eluded experimental synthesis, impeding an understanding pertinent physics. Here, we report successful synthesis its measured superconducting critical temperature T_{c} 215 K 172 GPa, which is evidenced by sharp drop...
Recently, a host/guest clathrate SrB3C3 with sp3-bonded boron-carbon framework was synthesized at around 50 GPa. On the basis of electron count, structure is understood as guest Sr2+ cations intercalated in (B3C3)3- framework. Previous calculations suggest that hole conductor an estimated superconducting critical temperature (Tc) 42 K ambient pressure. If atoms similar radius, such Rb, can substitute lattice, electronic well superconductivity properties this material will be modified...
The interaction of water within synthetic and natural hydrogel systems is fundamental importance in biomaterial science. A systematic study presented on the swelling behavior states for a polyethylene glycol-diacrylate (PEGDA)-based model neutral system that goes beyond previous studies reported literature. Hydrogels with different network structures are crosslinked swollen combinations phosphate-buffered saline (PBS). Network variables, glycol (PEG) molecular weight (MW), fraction...
2,5-Furandicarboxylic acid (FDCA) is one of the top-12 value-added chemicals from sugar. Besides wide application in chemical industry, here we found that solid FDCA polymerized to form an atomic-scale ordered sp3-carbon nanothread (CNTh) upon compression. With help perfectly aligned π-π stacked molecules and strong intermolecular hydrogen bonds, crystalline poly-FDCA CNTh with uniform syn-configuration was obtained above 11 GPa, crystal structure determined by Rietveld refinement X-ray...
Saturated sp3-carbon nanothreads (CNTh) have garnered significant interest due to their predicted high Young's modulus and thermal conductivity. While the incorporation of heteroatoms into central ring has been shown influence formation CNTh yield chemically homogeneous products, impact pendant groups on polymerization process remains underexplored. In this study, we investigate pressure-induced phenol, revealing two phase transitions occurring below 0.5 4 GPa. Above 20 GPa, phenol...
Boron-based clathrate materials, typically with three-dimensional networks of B atoms, have tunable properties through substitution guest but the tuning cages themselves has not yet been developed. By combining crystal structural search laser-heated diamond anvil cell technique, we successfully synthesized a new B-based boride, LaB8, at ~108 GPa and ~2100 K. The novel structure B-richest cage, 26 atoms encapsulating single La atom. LaB8 demonstrates phonon-mediated superconductivity an...
The four-membered nitrogen ring (N4-ring) is predicted to be a high-energy density moiety and has been the target of chemical synthesis for quite long time. Here, by compressing 1:1 co-crystal trans-azobenzene trans-perfluoroazobenzene up ∼40 GPa, azo groups were restrained closely in parallel crystal underwent two competitive addition reactions. One [4 + 2] cycloaddition with group as part diene phenyl dienophile. other [2 between groups, which produced an unprecedented N4-ring structure...
Recent discovery of superconductive rare earth/actinide superhydrides has ushered in a new era superconductivity research at high pressures. This distinct type clathrate metal hydrides was first proposed for alkaline-earth-metal hydride CaH6 that, however, long eluded experimental synthesis, impeding an understanding pertinent physics. Here, we report successful synthesis and its measured superconducting critical temperature Tc 215 K 172 GPa, which is evidenced by sharp drop resistivity to...
In pursuit of high-Tc hydride superconductors, the molecular hydrides have attracted less attention because hydrogen quasimolecules are usually inactive for superconductivity. Here, we report on successful synthesis a novel bismuth superconductor C2/c-BiH4 at pressures around 170–180 GPa. Its structure comprises atoms and elongated molecules with H–H bond length 0.81 Å 170 GPa, characterizing it as typical hydride. Transport measurements revealed occurrence superconductivity Tc up to 91 K...
The synergistic reaction between alkyne and phenyl groups is a promising pathway for decreasing the pressures of aromatics enabling scalable high-pressure synthesis carbon materials via pressure-induced polymerization (PIP). Here by combining theoretical calculations experimental data, we demonstrate that simultaneous alkynyl occurred in phenylpropiolic acid (PPA) with threshold distance dC···C = 3.3 Å, generating an extended structure consisting sp2 sp3 carbons. pressure was significantly...
We present a comprehensive study on structural and electronic properties of lanthanum intermetallic compounds (${M}_{x}{\mathrm{La}}_{y}$, $M=\text{Be}$, Mg, Al, Ga, In, Tl, Pb, Bi) under high pressure. By using swarm intelligence structure search method combined with first-principles calculations, pressure-induced phase transitions ${M}_{x}{\mathrm{La}}_{y}$ were investigated, several new structures predicted. A universal yet intriguing phenomenon was found; that is, all these will...
Stereolithography (SL) has several advantages over traditional biomanufacturing techniques such as fused deposition modeling, including increased speed, accuracy, and efficiency. While SL been broadly used in tissue engineering for the fabrication of three-dimensional scaffolds that can mimic vivo environment cell growth regeneration, lithographic printing is usually performed on single-component materials cured with ultraviolet light, severely limiting versatility cytocompatibility systems....
Developing highly active and cost-effective electrocatalysts to replace Pt-based catalysts for the sluggish oxygen reduction reaction (ORR) is a major challenge in commercialization of fuel cells. Although two-dimensional (2D) transition-metal tellurides have recently been proposed as alternative low-cost ORR catalysts, fundamental study on origin activity required further optimize their composition performance. Herein, we investigated electronic properties catalytic performances series...
The crystal structure of 1H-tetrazole under high pressure is redetermined with one molecule in a unit cell and its reversible polymerization C–N bonding demonstrated below 100 GPa by experimental theoretical methods.
Polypropylene grafted with maleic anhydride (PP-g-MA) was prepared and then used as compatibilizer in the alloy of r-PET/PP to improve compatibility different phases. The influences grafting ratio MA, additive amount PP-g-MA, r-PET PP flowability mechanical properties were researched. results obtained show that PP-g-MA can phases; favorite MA on mainchains is 1.4%; when 12%, melt index indicates not only becomes better but also tensile strengthen higher; should be designed at 20/80 order...
Based on the demands for logistics services, establish a dynamic neural network quality function deployment, and combined with an automotive enterprise, build linear programming model evaluation. The optimization method this paper presents will make enterprises get market demand momentarily optimize indexes possibly.
Pressure of gigapascal (GPa) is a robust force for driving phase transitions and chemical reactions with negative volume change intensely used promoting combination/addition reactions. Here, we find that the pressure gradient between high-pressure region ambient-pressure environment in diamond anvil cell an even stronger to drive decomposition/elimination A difference tens GPa can "push" hydrogen out from its compounds environment. More importantly, transition metal hydroxides such as MnOOH,...
This paper introduces the current situation of ethylene oxide/ethylene glycol plants decarbonization system Sinopec Maoming company. The solid polymer produced in condensate liquid reecycle gas is characterized. formative factors are analysed.Some referential basises provided for long-periodic safety production.