COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
·
IF 8.7
Yunfeng Wang,Yingang Gui,Shasha He,Jiacheng Yang
In this study, through structural design, thin film doping modification, and electrode preparation, a high-performance triboelectric nanogenerator (TENG) has been achieved, and an electromagnetic generator is incorporated as an energy supplement to construct a self-powered sensing system for gas alarm and environmental monitoring. The high porosity of NiO derived from MOFs, high charge accumulation, and the high charge carrier mobility of N-MWCNTs promote charge capture and transfer, greatly enhancing the output performance of the triboelectric nanogenerator. Under the optimal doping ratio, the open-circuit voltage can reach 860 V, and the maximum short-circuit current up to 47 μA, sufficient to power 600 LEDs lights, achieving a power density of 10.45 W/m 2 . Meanwhile, MXene/Carbon/Ecoflex electrodes were fabricated to enhance the contact efficiency between the thin film and electrodes, further obtaining an open circuit voltage of 1020 V. This work provides a viable solution for the design of high-performance hybrid nanogenerators.
研究领域:
纳米技术
·
能量收集
·
材料科学
·
环境监测
·
传感器与执行器
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 59
·期 2
·715-727
·
IF 4.5
Li Bin,Zhou Mengjing,Wu Aolin,Liu Haiying,Du Li,Su Lihua
Preparation of composite hydrogels by in situ polymerization (SP) using choline chloride (ChCl), acrylamide (AM), and urea (U) as raw materials for deep eutectic solvent (DES), with the introduction of PVA and PVDF as fillers into DES. Characterization of the composite hydrogels was conducted using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). This study analyzed the pressure sensitivity, piezoelectricity, swelling behavior, and mechanical properties of the composite hydrogels. The results indicate that due to the dipole–dipole interactions between PVA and PVDF, the composite hydrogels exhibit excellent pressure sensitivity and piezoelectric performance. When the ratio of PVA to PVDF is 1:1, the composite hydrogels exhibit optimal performance, with a 3.37-fold increase in pressure sensitivity and a 6.49-fold increase in piezoelectricity compared to other ratios. This research provides a method for preparing composite hydrogels with excellent piezoelectric performance and pressure sensitivity.
研究领域:
材料科学
·
高分子科学
·
化学工程
·
纳米技术
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DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Xuyang Li,Zongxue Yu,Liangyan Shao,Xiaofang Feng,Haojie Zeng,Yuchuan Liu,Runxuan Long,Ximei Zhu
In order to effectively solve the two major problems of photocatalyst recovery and membrane fouling , this research combines photocatalyst and membrane separation technology . In this study, the NH 2 -MIL-88B(Fe)/CDs@GO material with good photocatalytic properties was synthesized by hydrothermal method and mechanical stirring, and the photocatalytic membrane was obtained by vacuum filtration. The results show that the NH 2 -MIL-88B(Fe)/CDs@GO membrane can effectively intercept and degrade methylene blue (MB). After 10 cycles, the rejection rate of MB can still reach 99.5%, which is about 2.5 times of pure GO membrane (40%). After 15 min of visible light irradiation, the Flux recovery rate (FRR) of NH 2 -MIL-88B(Fe)/CDs@GO membrane can reach 95%, and the antifouling performance is excellent. In this study, the composite photocatalytic membrane shows excellent stability, photocatalytic performance and self-cleaning property, which is conducive to widening the application prospect of wastewater treatment .
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
DESALINATION
·
2026
·
IF 9.9
Chen Wu,Hongai Zheng,Xiqian Zheng,Daquan Zhang,Lizhi Zhang,Feiyu Chen,Lifeng Yang,Junliang Wang
FeOCl/MIL-88A composites were used to modify the surface of polyvinylidene fluoride (PVDF) membranes. • Simultaneous high pollutant degradation (94% RhB, 91% MB) and remarkable antifouling with FRR increased from 61% to 93%. • Low Fe leaching (0.102 mg/L) and sustained performance over 5 cycles confirm excellent reusability and safety. • The heterojunction between FeOCl and MIL-88A facilitates charge separation and generates ·OH and·O 2 − . Catalytic membranes fabricated by surface loading of active materials have shown great potential for antifouling improvement. This study investigated a photo-Fenton synergistic membrane separation process by fabricating a FeOCl/MIL-88A composite on the surface of PVDF membranes, which markedly enhanced the membrane performance. The modified membrane (FM-3) maintained high pure water flux (518.2 L/m 2 ·h·bar) and porosity (80%) while exhibiting hydrophilicity (contact angle of 8°). Compared with the pristine membrane, FM-3 achieved a substantially higher HA rejection (78%) with only a minor loss of permeability, alleviating the conventional permeability–rejection trade-off. Under visible-light-driven photo-Fenton conditions, FM-3 demonstrated high degradation efficiencies of 94% for RhB and 91% for MB, with stable performance over 5 cycles. Moreover, the membrane demonstrated remarkable antifouling performance, with a flux recovery ratio (FRR) of 93% and an irreversible fouling rate (R ir ) of only 7%. Finally, a possible membrane antifouling mechanism is proposed:·OH and·O 2 − are the primary active species in the catalytic process. The formed heterojunction facilitates efficient charge separation and promotes the Fe 3+ /Fe 2+ cycle. DFT calculations further confirmed the electron transfer direction from FeOCl to MIL-88A, providing theoretical support for the proposed heterojunction mechanism. This work provides a novel and effective approach for designing high-performance catalytic membranes with synergistic separation and anti-fouling functions for sustainable wastewater treatment. Download: Download high-res image (145KB) Download: Download full-size image
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2026
·Vol. 26
·期 17
·6875-6885
·
IF 3.6
Li Yanan,Wang Haijun,Yu Qianqian,Chen Yilin,Zhang Fuyuan
Poly(vinylidene
fluoride) (PVDF)-based piezoelectric materials
are commonly constrained by low polar-phase content. Here, we report
an APTES-assisted in situ crystallization strategy to fabricate PVDF/APTES@CsPbBr 3 nanocomposites. APTES acts as a bifunctional linker that
passivates CsPbBr 3 quantum dot surfaces while introducing
protonated ammonium (−NH 3 + ) groups. When
incorporated into electrospun PVDF fibers, these -NH 3 + groups interact with fluorine atoms of PVDF chains via ionic-dipole
interactions, as evidenced by a blue shift of the C–F stretching
band in Fourier-transform infrared (FT-IR). This molecular-level interaction
lowers the free energy barrier for polar phase nucleation, promoting
the transformation from nonpolar α phase to electroactive β
phase, as confirmed by X-ray diffraction (XRD), FT-IR, and differential
scanning calorimetry (DSC). The optimized composite achieves a markedly
higher β-phase fraction compared to pure PVDF and unmodified
CsPbBr 3 composites. As a functional demonstration, the
material delivers substantially enhanced piezoelectric output (130
V) and operates as a self-powered motion sensor. When coupled with
a support vector machine classifier, the system achieves high-accuracy
recognition (94.6%) of diverse human activities. This work establishes
APTES-mediated interfacial engineering as a versatile platform for
controlling polymer crystallization in hybrid systems toward high-performance
piezoelectric applications, with the output enhancement attributed
to a synergistic combination of increased β-phase fraction,
intrinsic piezoelectricity of the perovskite fillers, improved interfacial
stress transfer, and refined fiber morphology.
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产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2026
·
IF 2.8
Hou Dusong,Gao Danhong,Liu Hongwei,Deng Hanling,Lu Qianyao,Xiong Fan,Shao Hengwei,Lu Yuanyuan,Wang Mengxin,He Xinjian,Huang Sheng
The advancements in flexible display technology impose stringent demands on the optical properties and environmental stability of perovskite luminescent materials. Addressing the core challenges of poor environmental stability and optical performance degradation in methylammonium lead bromide (MAPbBr 3 ) quantum dots, this study proposes a dual-stability strategy combining “internal crystallization regulation” with “external physical protection.” A ZnO/MAPbBr 3 /PVDF composite film was prepared through synergistic modification with zinc oxide (ZnO) and polyvinylidene fluoride (PVDF), with the optimal ZnO content identified as 40 μL. Under these conditions, the composite film exhibited a green light emission full width at half maximum (FWHM) as low as 19.88 nm and a photoluminescence quantum yield (PLQY) of 76.06%, demonstrating high color purity. After heating at 100°C for 60 min, the PL intensity decayed by only 30%, and after 168 h of immersion in water, it retained 65% of its initial PL intensity, indicating significantly enhanced environmental tolerance. When this film served as the green conversion layer integrated with red CsPbI 3 quantum dot films and GaN blue LEDs to form a white light-emitting diode (WLED), the device achieved a color gamut coverage of 126% of the NTSC standard and 94% of the Rec. 2020 specification. Research indicates that ZnO enhances crystalline integrity by regulating MAPbBr 3 nucleation and growth, while PVDF forms a compact hydrophobic barrier. Their combined effect enhances both the film’s optical performance and environmental stability, enabling WLEDs with ultrawide color gamut that meet the requirements of high-performance flexible display and lighting applications.
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高影响因子
DESALINATION
·
2026
·
IF 9.9
Zhenwu Chen,Haoran Zhang,Ziyi Zhang,Mengxin Liu,Kunlai Zhang,Lei Pan
Template-free blade-coating fabricates a MXene/PVDF membrane with gradient pores. • Top-small and bottom-large pores enable fast water transport and heat localization. • One-sun evaporation rate is 1.54 kg m −2 h −1 and photothermal efficiency is 93.66%. • Outstanding salt resistance and long-term durability are achieved. • Desalinated seawater meets both WHO and Chinese standards for drinking water. Addressing the global freshwater scarcity crisis, solar-driven interfacial evaporation represents a promising, energy-efficient desalination technology. Conventional porous evaporators, however, face a fundamental performance trade-off between efficient water supply and effective surface heat localization. To resolve this conflict, this study presents a novel two-dimensional (2D) MXene/polyvinylidene fluoride (PVDF) composite membrane featuring an architecturally gradient “top-small, bottom-large” pore structure, fabricated via a straightforward blade-coating and immersion precipitation phase inversion process without any template. This unique design simultaneously enables rapid capillary-driven water transport and confines thermal energy at the evaporation interface. A hydrophobic fluorinated silica (F-SiO 2 ) is further applied to ensure stable self-floating and prevent salt accumulation. The resulting membrane (~0.25 mm thick) demonstrates high porosity (~40.7%) and superior broad-spectrum light absorption (~95%). Under 1-sun illumination, it achieves a high evaporation rate of 1.54 kg m −2 h −1 and a remarkable photothermal conversion efficiency of 93.66%, while also exhibiting excellent cycling stability and salt resistance. Practical desalination tests using Bohai Sea water confirm that the purified water meets both World Health Organization (WHO) and Chinese drinking water standards. This work provides an effective strategy for designing high-performance, low-cost solar evaporator, demonstrating significant potential for scalable desalination and water purification applications. Download: Download high-res image (237KB) Download: Download full-size image
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 16
·1295
·
IF 3.2
Zeng Weiqiang,Fan Ping,Zhang Yukang
Circumventing the intricate high-voltage poling process is a pivotal challenge for advancing the practical application of poly(vinylidene fluoride) (PVDF)-based flexible piezoelectric devices. This study employs a synergistic strategy that combines molybdenum disulfide modified with polar compounds (P-MoS 2 ) as β -crystal inducer with thermal stretching to successfully fabricate high-performance self-polarized PVDF composite films. The results demonstrate that the P-MoS 2 significantly enhances the β -phase crystal content of PVDF via strong interfacial interactions and charge-induction effects, while simultaneously achieving initial dipole alignment. This results in simultaneous improvements in piezoelectric output and dielectric constant. A more significant discovery is that, after controlled thermal stretching of the aforementioned self-polarized films, the piezoelectric and dielectric properties of the material exhibit distinct evolutionary trajectories: as the degree of stretching increases, both the β -crystal content and piezoelectric output voltage show a continuous monotonic rise, while the dielectric constant exhibits a non-monotonic change of first increasing and then decreasing. This “performance decoupling” phenomenon reveals a dynamic shift in the dominant physical mechanisms within the material where the sustained enhancement of piezoelectric output primarily stems from the extreme optimization of β -crystal macroscopic orientation achieved through thermal stretching. Conversely, the evolution of the dielectric constant arises from the interplay between two competing mechanisms: the initial interface polarization strengthened by improved filler dispersion and the subsequent highly oriented crystal structure that severely restricts polymer chain segment mobility while suppressing dipole switching polarization. This work not only demonstrates the tremendous potential of a synergistic strategy combining chemical modification and physical stretching for achieving highly efficient self-polarization, but more importantly, elucidates the inconsistent performance evolution. By revealing the competition among multiple mechanisms within self-polarizing materials, it provides crucial theoretical and experimental foundations for designing new-generation of high-performance flexible piezoelectric materials that require no high-voltage polarization.
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高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
He Liu,Zixu He,Chenbo Gong,Runyi Han,Zichen Qi,Lin Shi,Zhaohong Song,Fan Wang,Dong Wen,Zhaopeng Xu
To address the lack of non-invasive real-time monitoring of hand motor symptoms in Parkinson’s disease, this study proposes a flexible piezoelectric sensor that detects electrical signal responses generated under different finger bending angles and frequencies, which can be used to monitor and evaluate finger motor function and rehabilitation training in patients with Parkinson’s disease. Moreover, the sensor maintains stable output over seven days and exhibits good biocompatibility. A doping strategy employing polypyrrole-coated BaTiO 3 (PPy@BT) nanoparticles is used to significantly enhance the piezoelectric performance of poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE) nanofiber sensors. PVDF-TrFE/PPy@BT composite nanofiber membranes are prepared by electrospinning and assembled into a flexible piezoelectric nanogenerator (PENG). The microstructure, dielectric properties, mechanical, and piezoelectric performance of the composite are systematically characterized. Experimental results demonstrate that, under optimal doping conditions, the PENG exhibits an open-circuit voltage of 13.64 V, which corresponds to approximately 455% of the value of the undoped PVDF-TrFE membrane. Furthermore, the device maintains a stable output over 3000 cyclic loadings. The device achieves a maximum sensitivity of 39.34 V·kPa⁻ 1 in the low-pressure region (0–1 kPa) and delivers a peak power density of 0.32 W·m⁻ 2 at a load resistance of 10 8 Ω, demonstrating its excellent energy conversion efficiency.
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2026
·
IF 5.5
Lu Kun-Rong,Li Dong-Yang,Wang Hong-Yu,Han Yue-Xi,Shi Fa-Nian,Wang Peng-Fei,Zhang Yu-Hang
Polyethylene oxide (PEO)-based polymer electrolytes hold promise for application in solid-state lithium metal batteries. However, the high crystallinity of PEO poses a significant challenge to ion transport, particularly limiting its room-temperature performance. Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), a semi-crystalline polymer with rigid fluorocarbon chains, can provide robust mechanical support to the electrolyte system. Herein, a quasi-solid electrolyte (QSE) was fabricated by using PEO and PVDF-HFP, in which succinonitrile (SN) was introduced as a plasticizer to enhance the electrochemical properties at room temperature. Innovatively, 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) was employed as a shield layer to prevent direct contact between the Li anode and the prepared SN-modified PEO/PVDF-HFP-QSE, thus forming a stable anode/electrolyte interface. The obtained TTE-P 8 P 2 S(12%)-QSE exhibits high room-temperature electrochemical properties, with an ionic conductivity of 4.02 × 10 –4 S cm –1 , a lithium-ion transport number of 0.47, and a wide electrochemical window of 5.4 V vs. Li + /Li. By interfacial modification, TTE-P 8 P 2 S(12%)-QSE can enable long-term cycling of LiCoO 2 cathodes and Li anodes, with an initial discharge capacity of 126.9 mAh g –1 , and achieve an average capacity of 142.8 mAh g –1 within 100 cycles at room temperature. Characterizations reveal that the incorporation of TTE preserves the structural integrity of the lithium electrodes, promotes efficient utilization of active lithium ions, and tailors the composition and structure of the solid-electrolyte interphase (SEI) on the lithium metal anode, thereby substantially enhancing interfacial stability. This work provides a feasible strategy for building high-energy-density lithium metal batteries for room-temperature applications.
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·
IF 7.5
Qinjuan Cao,Jian Jian,Yixiao Dan,Yuxin Liu,Zihao He,Weijie Sun,Zhengqiu Yuan,Yusheng Zhang,LeLin Zeng,Xiaowen Zhang,Hu Zhou
A novel "sheet-on-particle" Z-scheme Bi 2 MoO 6 @BiOBr heterojunction was structurally engineered and immobilized within a porous polyvinylidene fluoride membrane using an integrated ultrasonic-assisted in-situ precipitation and hydrothermal approach. The Bi 2 MoO 6 nanoparticles are uniformly distributed on the BiOBr nanosheets, establishing abundant heterogeneous interfaces that facilitate efficient Z-scheme charge transfer. This configuration enhances the visible light response and reduces carrier recombination. The composite membrane demonstrates exceptional photocatalytic activity, achieving a 98.71% degradation rate of ofloxacin through the predominant action of •O 2 ⁻ and h⁺ species. Its adaptability across a wide pH range and its capability for broad-spectrum pollutant degradation highlight its strong potential for scalable photocatalytic wastewater treatment applications.
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DOI
高影响因子
DENTAL MATERIALS
·
2026
·
IF 6.3
Shixin Jin,Jiali Yu,Chi-Wai Kan,Chengfei Zhang,James Kit-Hon Tsoi
Objective To develop a self-powered, flexible, and biocompatible piezoelectric energy harvesting device for real-time oral health monitoring and therapeutic applications. Methods A composite membrane was fabricated by combining polyvinylidene fluoride (PVDF) with zirconium dioxide (ZrO₂) nanoparticles (0–3.0 wt%) using electrospinning technology. The membrane was characterized morphologically, chemically, mechanically, and piezoelectrically. The resulting piezoelectric nanogenerator (PENG) was integrated into bite-force testing films, mouthguards, and aligners. Biocompatibility was assessed using CCK-8, LIVE/DEAD, immunofluorescence, and ICP-OES analyses. Results The addition of 1.0 wt% ZrO₂ significantly increased the β-phase content and piezoelectric output, yielding a peak voltage of 0.81 V under 0.5 MPa pressure. A two-layer mouthguard achieved up to 1.05 V, enabling real-time bite-force monitoring with excellent linear response. Biocompatibility tests confirmed no cytotoxicity, along with normal cell adhesion and proliferation. Significance This work provides a biocompatible, self-powered piezoelectric platform that can harvest oral mechanical energy for wearable diagnostics and therapies, offering a promising strategy for advanced, real-time oral healthcare systems.
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PubMed
高影响因子
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