A5022802857- Conducting polymers and applications
- Electrowetting and Microfluidic Technologies
- Advanced Sensor and Energy Harvesting Materials
- Electrohydrodynamics and Fluid Dynamics
- Catalytic C–H Functionalization Methods
- Rock Mechanics and Modeling
- Fluid Dynamics and Thin Films
- Analytical Chemistry and Sensors
- Advanced Fiber Laser Technologies
- Surface Modification and Superhydrophobicity
- Photonic and Optical Devices
- Landslides and related hazards
- Asymmetric Synthesis and Catalysis
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Luminescence and Fluorescent Materials
- Asymmetric Hydrogenation and Catalysis
- Electrochemical sensors and biosensors
- Radical Photochemical Reactions
- Geomechanics and Mining Engineering
- Corrosion Behavior and Inhibition
- Advanced Cellulose Research Studies
- Coal Properties and Utilization
- Natural Fiber Reinforced Composites
- Solar-Powered Water Purification Methods
Peking University
2024
State Key Laboratory of Artificial Microstructure and Mesoscopic Physics
2024
China University of Mining and Technology
2023-2024
Xi'an Jiaotong University
2014-2022
Northeast Normal University
2021-2022
Luye Pharma (China)
2021
Institute of Electrical Engineering
2016
State Key Laboratory of Electrical Insulation and Power Equipment
2016
China XD Group (China)
2016
An efficient and general radical hydroamination of alkenes using Co(salen) as catalyst, N-fluorobenzenesulfonimide (NFSI) its analogues both nitrogen source oxidant was successfully disclosed. A variety alkenes, including aliphatic styrenes, α, β-unsaturated esters, amides, acids, well enones, were all compatible to provide desired amination products. Mechanistic experiments suggest that the reaction underwent a metal-hydride-mediated hydrogen atom transfer (HAT) with alkene, followed by...
An efficient and general intermolecular Cobalt(II)-catalyzed asymmetric alkylation of styrenes with (hetero)arenes including indoles, thiophene electron rich arenes has been developed, providing straightforward access to enantioenriched alkyl(hetero)arenes high enantioselectivity. Mechanistic studies suggest that the reaction underwent a CoH-mediated hydrogen atom transfer (HAT) alkenes, followed by pivotal catalyst-controlled SN 2-like pathway between in situ generated organocobalt(IV)...
Chip-scale integration of optical frequency combs, particularly soliton microcombs, enables miniaturized instrumentation for timekeeping, ranging, and spectroscopy. Although microcombs have been demonstrated on various material platforms, realizing complete comb functionality photonic chips requires the co-integration high-speed modulators efficient doublers, features that are available in a monolithic form X-cut thin-film lithium niobate (TFLN). However, pronounced Raman nonlinearity...
Solutions for the maintenance of safety in an isolated working face has not been well achieved; this is attributed to its unique overburden structure and strong mining-induced stress during advancement. This paper devoted filling research gap based on case study LW 10304 Xinglongzhuang Coal Mine, China. The distribution characteristics were theoretically investigated, followed by development a comprehensive identification method. results showed following: (1) strata form short “T” shape...
With the increase in coal mining depth, many rock bursts triggered by fold structures have been observed, but disaster mechanism is not clear. This research aims at investigating influence of upright structure(UFS) on burst mechanisms. The mechanical model and numerical UFS are constructed, stress evolution law working face a area studied utilizing engineering practice. shows that occurrence disasters structure has obvious regional characteristics. horizontal vertical distribution similar to...
As a green oxidant, H2O2 can be used to induce the polymerization of pyrrole. This approach avoids issue metal residue in polymer caused by oxidants, whereas reaction efficiency is low and corresponding mechanism not clear. In this study, uniform polypyrrole (PPy) nanoparticles were prepared using as an oxidant under UV irradiation presence polyvinylpyrrolidone (PVP). The morphology characterization indicated that spherical PPy capped PVP shell. Through investigation process, it was found...
Polyethylene glycol (PEG)/hybrid carbon foam (CF) phase change materials (PCMs) were prepared by integrating PEG into CF via dynamic-vacuum impregnation. The hybrid was first synthesized mixtures of graphene oxide (GO) and nanotubes (CNTs) with different volume ratios. morphologies, chemical structures, thermal conductivities, shape-stabilization levels, photo-thermal energy conversion levels these composite PCMs characterized systematically. exhibited good showed their original shapes...
In response to the increasingly severe situation of main roadway shock in coal seams, with a focus on strong-bump seam roadways under an asymmetric goaf certain mine, theoretical analysis, numerical simulation, and engineering practices were employed. This study investigated factors influencing roof damage, changes stress, characteristics overlying strata movement. research unveiled mechanism prevention seams goaf. The results indicate that damage can be divided into two categories:...
Zinc is widely used in battery negative electrodes and steel coatings for automotive industries. The anti-corrosion property of zinc the most important factor determining performance lifetime products. In this paper, both size-controlled poly N-(vinyl)pyrrole (PNVPY) nanoparticles carbon black (CB) were compounded with (vinyl butyral) (PVB) binder developing a series composite covered on substrates using spin-coating technique. morphologies surface cross section PNVPY/CB/PVB indicate that...
Conductive polypyrrole was synthesized with hydrogen peroxide (H2O2) as the oxidant. To promote polymerization of pyrrole, UV radiation employed. The effects on preparation were investigated. pyrrole conducted H2O2 concentration in range 0.12–0.96 M and H2SO4 6.8×10−4–0.19 M. structure characterization indicated that product overoxidized partly depending concentrations H2O2. increase led to a slight oxidation overoxidation polypyrrole, simultaneously. However, effectively suppressed...
Abstract An efficient and general radical hydroamination of alkenes using Co(salen) as catalyst, N ‐fluorobenzenesulfonimide (NFSI) its analogues both nitrogen source oxidant was successfully disclosed. A variety alkenes, including aliphatic styrenes, α, β‐unsaturated esters, amides, acids, well enones, were all compatible to provide desired amination products. Mechanistic experiments suggest that the reaction underwent a metal‐hydride‐mediated hydrogen atom transfer (HAT) with alkene,...
There is a very thick water-bearing key strata above the coal seam in Binchang mining area. When scale large, it easily breaks and leads to rockburst with surge of water gushing panel. Adopting layout pattern small panel large pillar can improve stability main strata, but at present, research on under extra-thick still not perfect. Therefore, taking second third panels mine as engineering background, width are optimized by means theoretical analysis, field measurement, numerical simulation...
This communication describes an innovative photocurable leaky dielectric for electrohydrodynamic patterning (EHDP). Based on the well-designed molecular structure, material in its liquid state exhibits low viscosity, high homogeneity, and more importantly a characteristic; meanwhile, UV light irradiation transforms it from into solid perfect instantaneously via interfacial reaction. Two typical EHDP processes have confirmed that beneficial properties of this help to rapidly fulfill higher...
Abstract An efficient and general intermolecular Cobalt(II)‐catalyzed asymmetric alkylation of styrenes with (hetero)arenes including indoles, thiophene electron rich arenes has been developed, providing straightforward access to enantioenriched alkyl(hetero)arenes high enantioselectivity. Mechanistic studies suggest that the reaction underwent a CoH‐mediated hydrogen atom transfer (HAT) alkenes, followed by pivotal catalyst‐controlled S N 2‐like pathway between in situ generated...
This study investigated the feasibility of using nanofibrilliated celluloses (CNF) (0.1% by weight binder materials) with three oxidation degrees, no (NCNF), low (LCNF), and high (HCNF), as a viscosity-modifying agent (VMA) to develop polyethylene fiber (PE)-engineered cementitious composites (ECC). Attenuated total reflection-Fourier transform infrared (ATR-FTIR), dynamic light scattering (DLS), zeta potential were performed characterize properties CNF different degrees. More stable...
Electrohydrodynamic structures with hydrophobic surfaces were fabricated instantaneously at ambient temperature using a designed leaky dielectric photoresist film.
Abstract This communication describes a straightforward, cost‐effective, and contactless lithography technique, electrohydrodynamic patterning, for fabricating the high‐aspect‐ratio micro‐/nanostructures of conducting polymer (CP) films directly on conductive substrate with high integrity throughput. Meanwhile, superhydrophilicity/superhydrophobicity final CP can be obtained by modulating ON/OFF‐state circuit assembly in structure formation process. The patterned are...
To achieve facile fabrication of a flexible patterned film via electrohydrodynamic patterning (EHDP), semiconducting photocurable resin (SCPR) was developed based on an optimized designed hyperbranched polymer and monomer. It showed low interface tension (34.185 mN/m), viscosity (9.21 mPa·s), high dielectric constant (27.6), suitable conductivity (1.63 × 10–5 S/cm), favorable wettability (a contact angle 19.3°), film-forming property ITO-coated substrate. Benefitting from its excellent...