A5101633064- Covalent Organic Framework Applications
- Advanced Photocatalysis Techniques
- High voltage insulation and dielectric phenomena
- Metal-Organic Frameworks: Synthesis and Applications
- Luminescence and Fluorescent Materials
- Advanced biosensing and bioanalysis techniques
- Microstructure and mechanical properties
- Dielectric materials and actuators
- ZnO doping and properties
- Inorganic Fluorides and Related Compounds
- Membrane Separation and Gas Transport
- Electrocatalysts for Energy Conversion
- Corrosion Behavior and Inhibition
- Advanced battery technologies research
- Metal and Thin Film Mechanics
- Thermal Analysis in Power Transmission
- High-Velocity Impact and Material Behavior
- Multiferroics and related materials
- Advanced Surface Polishing Techniques
- Ferroelectric and Piezoelectric Materials
- Pickering emulsions and particle stabilization
- Advanced Sensor and Energy Harvesting Materials
- Electromagnetic Scattering and Analysis
- X-ray Diffraction in Crystallography
- Catalytic Processes in Materials Science
Beijing National Laboratory for Molecular Sciences
2021-2024
Chinese Academy of Sciences
2021-2024
Institute of Chemistry
2021-2024
University of Chinese Academy of Sciences
2021-2024
University of Connecticut
2021-2024
State Key Laboratory of Crystal Materials
2018-2023
Shandong University
2018-2023
Tsinghua University
2017-2023
Peking University
2022-2023
Anhui University of Science and Technology
2022
Investigating a high-efficiency photoelectrochemical (PEC) system is an essential strategy to realize solar energy conversion, and the catalytic activity mostly regulated by intrinsic electronic structure. Here, we synthesize ferromagnetic ZnFe2O4 (ZFO) photoelectrode with improved property introducing cation disorder oxygen vacancies. Ferromagnetic enables significant enhancement of PEC performance simply placement permanent magnet provide magnetic field. The improvement assigned electron...
Covalent organic frameworks (COFs) can exhibit high specific surface area and catalytic activity, but traditional solution-based synthesis methods often lead to insoluble infusible powders or fragile films on solution surface. Herein we report large-area -C=N- linked two-dimensional (2D) COF with controllable thicknesses via vapor induced conversion in a chemical deposition (CVD) system. The assembly process is achieved by reversible Schiff base polycondensation between PyTTA film TPA vapor,...
Two-dimensional (2D) imine-based covalent organic frameworks (COFs) hold potential for photocatalytic CO2 reduction. However, high energy barrier of imine linkage impede the in-plane photoelectron transfer process, resulting in inadequate efficiency photoreduction. Herein, we present a dimensionality induced local electronic modulation strategy through construction one-dimensional (1D) pyrene-based (PyTTA-COF). The dual-chain-like edge architectures 1D PyTTA-COF enable stabilization aromatic...
Constructing uniform covalent organic framework (COF) film on substrates for electronic devices is highly desirable. Here, a simple and mild strategy developed to prepare them by polymerization solid-liquid interface. The universality of the method confirmed successful preparation five COF films with different microstructures. These have large lateral size, controllable thickness, high crystalline quality. And patterns can also be directly achieved via hydrophilic hydrophobic interface...
Developing highly active materials that efficiently utilize solar spectra is crucial for photocatalysis, but still remains a challenge. Here, we report new donor-acceptor (D-A) covalent organic framework (COF) with wide absorption range from 200 nm to 900 (ultraviolet-visible-near infrared light). We find the thiophene functional group accurately introduced into electron acceptor units of TpDPP-Py (TpDPP: 5,5'-(2,5-bis(2-ethylhexyl)-3,6-dioxo-2,3,5,6-tetrahydropyrrolo...
Abstract The preparation of large‐area 2D conductive metal–organic framework (MOF) films remains highly desirable but challenging. Here, inspired by the capillary phenomenon, a face‐to‐face confinement growth method to grow Cu 2 (TCPP) (TCPP = meso‐tetra(4‐carboxyphenyl)porphine) MOF on dielectric substrates is developed. Trace amounts solutions containing low‐concentration 2+ and TCPP are pumped cyclically into micropore interface produce this growth. crystal structures confirmed with...
We demonstrate the aggregation-induced electrochemiluminescence (AIECL) generated by 1,1,2,2-tetrakis(4-bromophenyl)ethane (TBPE)-based conjugated microporous polymers (TBPE-CMPs) and its biosensing application. synthesized three TBPE-CMPs (i.e., TBPE-CMP-1, -2, -3) using different molecules including tris(4-ethynylphenyl)amine (TEPA), 4,4'-diethynylbiphenyl (DEP), 2,4,6-tris(4-ethynylphenyl)-1,3,5-triazine (TEPT). The can act as (ECL) emitters to generate AIECL. Among them, TBPE-CMP-1...
Abstract Conductive metal-organic frameworks (MOFs) have performed well in the fields of energy and catalysis, among which two-dimensional (2D) three-dimensional (3D) MOFs are well-known. Here, we synthesized a one-dimensional (1D) conductive framework (MOF) hexacoordinated 1,5-Diamino-4,8-dihydroxy-9,10-anthraceneedione (DDA) ligands connected by double Cu ions, resulting nanoribbon layers with 1D π-d conjugated plane out-of-plane π-π stacking, facilitates charge transport along two...
Interstitial oxygen embrittles titanium, particularly at cryogenic temperatures, which necessitates a stringent control of content in fabricating titanium and its alloys. Here, we propose structural strategy, via grain refinement, to alleviate this problem. Compared coarse-grained counterpart that is extremely brittle 77 K, the uniform elongation an ultrafine-grained (UFG) microstructure (grain size ~ 2.0 µm) Ti-0.3wt.%O successfully increased by order magnitude, maintaining ultrahigh yield...
The manipulation of topological architectures in two-dimensional (2D) covalent organic framework (COF) materials for different applications is promising but remains a great challenge. Here, we first report the topology-selective synthesis two distinct varieties 2DCOFs, imine-based HT-COFs and benzimidazole-fused BI-HT-COFs, by simply altering acid catalysts. To HT-COFs, superlattice 1D channel with persistent triangular shape formed via Schiff base reaction, while to hexagonal lattice...
Two-dimensional (2D) conjugated metal-organic framework (c-MOF) films bring a completely new opportunity in the fields of catalysis, energy, and sensors, but preparing large-area continuous 2D c-MOF remains tremendous challenge. Here, we report universal recrystallization strategy to synthesize films, revealing that can significantly improve electrochemical sensor sensitivity. Applying Cu3(HHTP)2 (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) film as active layer, for glucose detection shows...
Polymer-based dielectrics are essential components in electrical and power electronic systems for high density storage conversion. A mounting challenge polymer is how to maintain their insulation at not only electric fields but also elevated temperatures, order meet the growing needs renewable energies grand electrifications. Here, a sandwiched barium titanate/polyamideimide nanocomposite with reinforced interfaces via two-dimensional nanocoatings presented. It demonstrated that boron...
We present a dimensional regulating charge transfer strategy to achieve an enhanced electrochemiluminescence (ECL) by constructing one-dimensional pyrene-based covalent organic framework (1D-COF). The dual-chain-like edge architecture in 1D-COF facilitates the stabilization of aromatic backbones, enhancement electronic conjugations, and decrease energy loss. generates anodic (92.5-fold) cathodic (3.2-fold) signals with tripropylamine (TPrA) K2S2O8 as coreactants, respectively, compared...
By mimicking the layered structure of nacre, we successfully fabricated a nano-laminar coating on high-voltage insulators. The is demonstrated to achieve higher flashover strength by effectively dissipating surface charge under dc stress.
Surface charge accumulation on the insulator surface and resulting flashover voltage reduction are considered primary factors to hinder large-scale use of HVDC system, especially gas-insulated system. In this study, Buckminster-fullerene C60 different loadings is introduced into epoxy resin for purpose restricting mobility carriers within material thus suppressing under dc voltage. Experimental results have shown that with addition tiny amount fullerene epoxy, conductivity composites...
Facile synthesis and post-processing of covalent organic frameworks (COFs) under mild synthetic conditions are highly sought after important for widespread utilizations in catalysis energy storage. Here we report the chemically stable aza-fused COFs BPT-COF PT-COF by a liquid-phase method. The process involves spontaneous polycondensation vicinal diamines diketones, is driven near-equilibrium growth COF domains at very low monomer concentration. method permits situ assembly COF-GO hybrid...
Adjusting the local coordination environment of single-atom electrocatalysts is a viable way to improve catalytic performance. The diversity geometric structures limited traditional in-plane configuration, with only little consideration paid out-of-plane configurations due lack suitable carriers and fabrication methods. This study reports Co-based catalysts mediated by conjugated bipyridine-rich covalent organic framework (COF). bipyridine nitrogen on COF layer backbone these serves as...
We demonstrate the construction of an aggregation-induced electrochemiluminescent (AIECL) sensor for glutathione (GSH) assay by integrating aminal-linked covalent organic framework (A-COF) with manganese dioxide (MnO2) nanosheets. The AIECL A-COF is quenched MnO2 nanosheets via resonance energy transfer (ERET) from excited to MnO2. presence GSH can reduce into Mn2+, restoring emission A-COF. This has characteristics fast response, high sensitivity, and good selectivity toward GSH, it...
C4F7N [2,3,3,3-tetrafluoro-2-(trifluoromethyl)propanenitrile]/CO2 gas mixtures are being developed as an eco-friendly electrical insulator to replace SF6, the most potent greenhouse industrial gaseous dielectric. However, recent studies have reported complicated and often conflicting decomposition pathways for C4F7N/CO2 mixtures, which has raised concerns. In this work, characteristics of were studied comprehensively by both designed computations experiments. Computations performed starting...
Charge accumulation on a solid dielectric surface is one of the critical concerns for design and optimization insulation system in high-voltage power equipment, since it will lead to overstress electrical insulation. Therefore, important obtain charge density distribution with high accuracy. The acquisition insulators requires multipoint potential measurements establish inverse calculation determination an unknown distribution. Up now, extensive studies have been conducted this subject;...
The effective synthesis of functional nanoplatforms for simple, selective, and sensitive hydrogen sulfide detection has received significant attention because the toxicity sulfide. Here, a new porphyrin-based porous organic polymer, FePPOPEPA, was fabricated through Pd-/CuI-catalyzed Sonogashira cross-coupling reaction between tris(4-ethynylphenyl)amine iron(III) 5,10,15,20-tetrakis-(4′-bromophenyl)porphyrinato (FeTBrPP). Results showed that FePPOPEPA framework, high BET surface areas, wide...