A5101409420- Dielectric materials and actuators
- Catalytic C–H Functionalization Methods
- High voltage insulation and dielectric phenomena
- Asymmetric Hydrogenation and Catalysis
- Ferroelectric and Piezoelectric Materials
- Advanced Sensor and Energy Harvesting Materials
- Multiferroics and related materials
- Nanomaterials for catalytic reactions
- Microwave Dielectric Ceramics Synthesis
- Asymmetric Synthesis and Catalysis
- Polymer crystallization and properties
- Molecular Sensors and Ion Detection
- Polymer Nanocomposites and Properties
- Luminescence and Fluorescent Materials
- Intellectual Property and Patents
- Synthetic Organic Chemistry Methods
- Nanoplatforms for cancer theranostics
- Analytical Chemistry and Chromatography
- Conducting polymers and applications
- Electrostatic Discharge in Electronics
- Oxidative Organic Chemistry Reactions
- Aluminum Alloy Microstructure Properties
- Quinazolinone synthesis and applications
- Biopolymer Synthesis and Applications
- Nanocluster Synthesis and Applications
Zhejiang University
2023-2024
Zhejiang Lab
2023-2024
Beijing Chemical Industry Research Institute (China)
2018-2024
Northwest A&F University
2024
Nanjing University of Aeronautics and Astronautics
2022-2023
Sinopec (China)
2018-2023
Tsinghua University
1993-2022
Hebei University
2022
Shanghai Polytechnic University
2006-2022
Jiangnan University
2017-2022
Dielectric capacitors, serving as the indispensable components in advanced high-power energy storage devices, have attracted ever-increasing attention with rapid development of science and technology. Among various dielectric ceramic capacitors perovskite structures show unique advantages actual application, e.g., excellent adaptability high-temperature environments. And optimization their performance has become a hot research topic recently. This review presents basic principles ceramics...
We have discovered a new class of cooperative catalytic system, consisting heterogeneous polymer-immobilized bimetallic Pt/Ir alloyed nanoclusters (NCs) and 4-tert-butylcatechol, for the aerobic oxidation amines to imines under ambient conditions. After optimization, desired were obtained in good excellent yields with broad substrate scope. The reaction rate was determined be first-order respect catechol zero-order NC catalyst. Control studies revealed that both catalyst 4-tert-butylcatechol...
Reversible NIR luminescent probes with negligible photocytotoxicity are required for long-term tracking of cycling hypoxia in vivo. However, almost all the reported organic fluorescent until now were irreversible. Here we report a reversible arylazo-conjugated probe (HDSF) imaging. HDSF displays an off-on fluorescence switch at 705 nm normoxia-hypoxia cycles. Mass spectroscopic and theoretical studies confirm that sensing behavior is attributed to two electron-withdrawing trifluoromethyl...
Grafting modification is an effective method to enhance the electrical characteristics of polymeric materials by establishing deep traps that prevent carriers from being injected and transmitted. However, grafted polymers for insulation suffer large leakage current at elevated temperatures, limiting their application in harsh environments. We report itaconic anhydride polypropylene synthesized solution grafting preserves excellent insulating properties up 120 °C. It demonstrated restrains...
Dielectric energy storage devices with high power density show great potential in applications of smart grids, electrical vehicles, pulsed weapons, and so on. However, their limited recoverable badly restricts utilization harms the miniaturization, portability, integration electronics. Herein, equivalent amounts Bi2O3 Sc2O3 were introduced to improve property 0.10 wt % MnO2-doped AgNbO3@SiO2 ceramics by simultaneously enhancing maximum polarization, breakdown strength, relaxation feature. It...
Abstract A cooperative catalytic system of heterogeneous polymer‐supported bi‐metallic platinum/iridium (Pt/Ir) alloyed nanoclusters and 5,5′,6,6′‐tetrahydroxy‐3,3,3′,3′‐tetramethyl‐1,1′‐spiro‐bisindane (TTSBI) enabled the facile preparation quinazoline derivatives with low catalyst loadings broad substrate scope under mild aerobic oxidative conditions. The ability to perform reaction in gram‐scale open‐air conditions highlights synthetic application this system.
The first dearomative indole [5+2] cycloaddition reaction with an oxidopyrylium ylide resulted in efficient and diastereoselective construction of some highly functionalized synthetically challenging oxacyclohepta[b]indoles. protocol proceeds under very mild conditions, thus enabling high functional-group tolerance unique endo selectivity.
Introducing deep traps by grafting functional groups on molecular chains of polymeric dielectric materials has been proved as an effective way to improve their electrical properties, especially suppressing the space charge injection and accumulation. However, underlying physical mechanism origins effects properties dielectrics not fully understood. In order explore in grafted polymers, both simulations electronic band structures well 3D electric potential distributions at level experiments...
Lead-free antiferroelectric ceramics with high energy storage performance show great potential in pulsed power capacitors. However, poor breakdown strength and stability are the two main drawbacks that limit of ceramics. Herein, high-quality (Ag1-xNax)(Nb1-xTax)O3 were prepared by tape casting process. The was greatly improved as a result density fine grains, while enhanced owning to M2 phase. Benefiting from synergistic improvement stability, (Ag0.80Na0.20)(Nb0.80Ta0.20)O3 ceramic reveals...
Chemiluminescence (CL) imaging, as an excitation-free technique, exhibits a markedly improved signal-to-noise ratio (SNR) owing to the absence of excitation light source and autofluorescence interference. However, conventional chemiluminescence imaging generally focuses on visible first near-infrared (NIR-I) regions, which hinders high-performance biological due strong tissue scattering absorption. To address issue, self-luminescent NIR-II CL nanoprobes with second (NIR-II) luminescence in...
Abstract Despite polylactide (PLA) representing one of the most promising biodegradable materials, its applications lag far behind owing to disadvantages inherent brittleness and flammability, which is challengeable simultaneously overcome. In this work, a phosphorus‐containing core‐shell starch nanoparticle (FR‐CSS) was synthesized via soap‐free emulsion polymerization for concurrent improvement toughness flame retardancy PLA. The results revealed that with incorporation 10 wt% FR‐CSS,...
Antiferroelectric and paraelectric phases coexist at RT in AgNbO 3 ceramics, contributing to record-high energy density, ultrahigh efficiency breakdown strength.
Abstract Platinum nanoclusters supported on a polymer/carbon black composite material was found to be an excellent catalyst for the oxidative cyclization of phenolic and thiophenolic Schiff bases 2‐substituted benzoxazoles benzothiazoles under ambient conditions.
AgNbO3-based Pb-free antiferroelectric (AFE) ceramics have attracted increasing interest owing to their excellent potential in energy storage applications. Herein, a high recoverable density (Wrec) of 7.62 J/cm3 is realized La-doped AgNbO3 prepared via tape casting. The Wrec attributed breakdown strength Eb 380 kV/cm induced by dense microstructure as well fine grain size and enhanced AFE stability stemming from M2 phase reduced tolerance factor t. exceeding 6 was maintained wide temperature...
Polypropylene (PP) exhibits excellent insulation properties, high thermo-stability, and recyclable nature, thus expected to be the next-generation material for HV cable application. Chemical grafting modification is an effective technology improve electrical properties of polypropylene. In this paper, we develop report a new-type grafted PP by water-phase technology. The comprehensive including electrical, thermal, mechanical it are tested compared with traditional material—crosslinked...
Non-symmetric thieno[3,2-<italic>b</italic>]thiophene-fused BODIPYs were designed and characterized, further functionalization through the Knoevenagel condensation reaction to form a NIR sensor was achieved.
CouDE could monitor the endogenous H<sub>2</sub>S level change induced by alteration of CBS enzyme activity in living cells and <italic>in vivo</italic>.
Deep traps play an important role in the high-temperature dielectric properties enhancement of chemically grafting-modified polypropylene (PP), which is fairly promising field insulation material application. This study quantitatively investigates deep methyl methacrylate (MMA)-grafted PP from three points view: thermally stimulated depolarization current (TSDC), quantum chemistry computation, and direct (DC) volume resistivity. The TSDC results indicate that grafted MMA groups can deepen...