A5101648551- Advanced Sensor and Energy Harvesting Materials
- Dielectric materials and actuators
- Innovative Energy Harvesting Technologies
- Conducting polymers and applications
- Minerals Flotation and Separation Techniques
- Advanced Photocatalysis Techniques
- Heavy Metal Exposure and Toxicity
- Ferroelectric and Piezoelectric Materials
- Land Use and Ecosystem Services
- Supercapacitor Materials and Fabrication
- MXene and MAX Phase Materials
- Trace Elements in Health
- Electrospun Nanofibers in Biomedical Applications
- 2D Materials and Applications
- Gas Sensing Nanomaterials and Sensors
- Electromagnetic wave absorption materials
- Graphene research and applications
- Various Chemistry Research Topics
- Place Attachment and Urban Studies
- Nonlocal and gradient elasticity in micro/nano structures
- Peroxisome Proliferator-Activated Receptors
- Vibration Control and Rheological Fluids
- Smart Materials for Construction
- TiO2 Photocatalysis and Solar Cells
- Urban Green Space and Health
Tianjin University
2022-2024
Beijing Normal University
2022-2023
Ministry of Civil Affairs
2022-2023
Chinese Academy of Sciences
2016-2022
Beijing Institute of Nanoenergy and Nanosystems
2016-2022
University of Chinese Academy of Sciences
2022
Northeast Agricultural University
2020-2022
University of Electronic Science and Technology of China
2022
Beijing University of Technology
2022
Harbin University
2021
Abstract Human machine interface (HMI) devices, which can convert human motions to electrical signals control/charge electronic have attracted tremendous attention from the engineering and science fields. Herein, high output voltage a nonpiezoelectric meso ‐poly(lactic acid) ( ‐PLA) electret‐based triboelectric nanogenerator (NG) is combined with relatively current double‐layered poly( l ‐lactic (PLLA)‐based piezoelectric (PENG) for an E‐skin (electronic skin) device application. The hybrid...
The piezoelectric polymer poly(vinylidene fluoride) (PVDF) has been widely employed for energy harvesting or sensors. Its piezoelectricity originates from the unique crystal structure and oriented electric dipoles. Generally, electrospinning (ES) is able to improve crystallinity of PVDF. In this investigation, three types ES, including far-field ES with random (R-PVDF-FFES) aligned distribution (A-PVDF-FFES) near-field (PVDF-NFES), are applied fabricate a one-step polarized PVDF membrane. To...
Ecosystem service (ES) flow is an indispensable link between natural ecosystem and socioeconomic system. Research on ES of great significance for regional management ecological compensation policies. However, previous studies have mainly focused within a region or across regions, without distinguishing the relationship from to its external regions. Therefore, taking Huangshui River Basin in Tibetan Plateau as example, we combined revised equivalent factor method breaking point model analyze...
This paper presents for the first time that poly( l ‐lactic acid) (PLLA) nanofibers can show piezoelectricity along fiber direction (d 33 ) by using an electrospinning method. First, electrospun bundles are characterized scanning electron microscope, X‐ray, and piezoelectric coefficient measurements. The data supercritical CO 2 treatment greatly enhance of PLLA fibers, which be resulting from increased crystallinity fibers. Later, it is found generate a current 8 pA voltage 20 mV simple...
Abstract In addition to the rapid urbanization and industrialization around world, air pollution due particulate matter is a substantial threat human health. A considerable research effort has been devoted development of electrospun polymer nanofibers for filter applications. Among these new technologies, electrostatic charge‐assisted filtration promising technology removing small (PM). this investigation, biodegradable poly( l ‐lactic acid) (PLLA) are employed Electrostatic charges...
In this investigation, it is showed for the first time that a piezoelectric poly‐( l ‐lactic acid) (PLLA) unimorph based cantilever device utilized in energy harvesting applications. The comprises of double layer PLLA and thick polyethylene terephthalate substrate as passive layer. Under optimized conditions, output power devices can reach maximum value 14.17 µW, an open circuit voltage 9.05 V. generated signal be rectified through full‐bridge used to charge lithium‐ion battery 3.2 V within...
Recognizing changes in the supply–demand relationship of Flood Regulation Service (FRS) is significant for rational planning urban patterns and prevention flooding risks river basins. Most existing studies have explored its spatial pattern but pay less attention to spatiotemporal changes. This study dynamic FRS rapidly urbanizing We proposed Supply-Demand Ratio (SDR) method, which used Soil Conservation Curve Number (SCS-CN) model flood vulnerability index quantify supply demand FRS, then,...
Magnetic Fe3O4@hierarchical hollow silica spheres (Fe3O4@HHSS) with high specific surface area (SBET) were successfully synthesized by the microemulsification method. The microstructure and properties of Fe3O4@HHSS studied SEM, HRTEM, XRD, BET, VSM techniques. inner wall is composed small nanospheres Fe3O4 nanoparticles, nanoparticles are covered an external wall. As a magnetic material, showed good response could be easily recovered magnet. exhibited excellent ability to adsorb methylene...
Abstract This study reports a self‐powered pressure sensor based on monocharged electret nanogenerator (MENG). The exhibits great advantages in terms of high reliability, ease fabrication, and relatively sensitivity. working mechanism the MENG is studied by both theoretical derivations finite element analyses to determine electric potential distribution during device operation. stable open circuit voltage ≈10 V at 30.8 kPa corresponding sensitivity 325 mV −1 . stability testing result shows...
Abstract With the development of electrical vehicles and power electronics, demand for high‐temperature energy storage capacitors with high density has grown rapidly. In this investigation, 2D MoS 2 nanosheets are coated a thin layer poly(methyl methacrylate) then mixed polyimide (PI) solution to fabricate nanocomposites. The dielectric constant ‐g‐PMMA/PI (MPP‐3%) reaches 4.2, which is 20% higher than that pristine PI film. MPP‐3% nanocomposite 8.6 J cm −3 , 40% highest addition, electric...
In this investigation, we report the flexoelectricity-enhanced photovoltaic (FPV) effect in a flexible Pb(Zr0.52Ti0.48)O3 nanowire (PZT NW) array/PDMS (polydimethylsiloxane) nanocomposite. The simulation result of density functional theory (DFT) indicated that FPV PZT NWs can be greatly affected by interactions strain gradients with internal field generated self-polarization. We found when nanocomposite film was curved down, current aligned PZT-NW/PDMS composite increased 84.6-fold and...
Abstract Flexoelectricity is an electromechanical coupling effect in which electric polarization generated by a strain gradient. In this investigation, potassium sodium niobite/poly(vinylidene fluoride‐trifluoroethylene) (KNN/PVDF‐TrFE)‐based nanocomposite fabricated, and the flexoelectric used to enhance photovoltaic current ( I pv ) nanocomposite. It found that both pyroelectric can be simultaneously light illumination process. However, process contributes ≈85% of total current. When...
With the rapid development of electric vehicles, power electronics, and medical devices, high-energy-density capacitors have attracted considerable research engineering attention. In this investigation, we added surface-coated BNT-NN ((Bi0.5Na0.5)TiO3–NaNbO3) nanoparticles into poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) matrix to fabricate BNT-NN/PVDF-HFP nanocomposites. We found that composite with ultralow contents (0.5 wt %) exhibited an ultrahigh energy density 36.94 J cm–3...
Defect engineering is a promising means to create patterns on two-dimensional (2D) materials enable unconventional properties. However, defects usually exist abundantly and randomly 2D materials, which makes it difficult tune the properties in controllable manner. Therefore, highly desirable find out formation mechanism fabrication method of materials. In this report, we systematically investigated line monolayer MoS2 formed by introducing oxygen during CVD growth. The were due overoxidation...
Organic/inorganic nanocomposite materials have been extensively studied for high energy density capacitor applications due to their relatively large dielectric constant. However, most of these suffer from a very low breakdown field. In this investigation, poly(methyl methacrylate) (PMMA) grafted titanium dioxide (TiO2) (TiO2-g-PMMA) was synthesized through seeded emulsion polymerization method. Then, the hybrid nanoparticles were incorporated into poly(vinylidene...
We explore the protective effect of dietary SeMet on kidney tissue broilers and determine its potential molecular mechanism action.
Abstract Context In the Tibetan Plateau (TP), supply of cultural ecosystem services (CESs) is unique, and demand for CESs gradually increasing with rapid urbanization. Evaluating relationship between critical guiding regional sustainable development. However, due to difficulty in obtaining empirical data high altitude complex topography TP, relevant research still lacking. Objectives The objective this study was develop an approach address on TP evaluate CESs. Methods Taking...
Abstract The growing demand for electronic devices has induced a significant requirement high energy density capacitors. In this investigation, we introduced small groups of cyanoethyl cellulose (CEC) into polyimide (PI) substrate to create all organic CEC/PI composite films capacitor applications. Due the large dipole moment in C–CN dipoles CEC groups, dielectric constant CEC/PI-5 (5% CEC) increased by 26.3% 4.31. Compared pristine PI film at room temperature, breakdown field CEC/PI-0.5...