Materials Today Chemistry
·
2025
·
IF 6.7
Bowei Liu,Rui Feng,Ling Zhou,Tong Zhou,Peng Su,Guanghui Zhao,Lijie Dong
Flexible multiferroic materials with lightweight, wearability, portability and high magnetoelectric conversion present significant potential for applications in wearable, wireless and self-powered device engineering. However, simultaneously achieving high magnetoelectric conversion and ideal flexibility remains a demanding challenge of multiferroic composite materials. Here, novel flexible magnetoelectric nanocomposite films are developed based on the self-synthesized ultra-fine magnetostrictive nanofibers and electrostrictive polymer P(VDF-TrFE). The ultra-fine magnetostrictive nanofibers have been tailored into 15 nm of average diameter by utilizing an ultra-fine polymer template ( s PPTA). This design aligns with the dimensions of P(VDF-TrFE) crystals to ensure optimal interfacial compatibility and effective stress transfer between the magnetostrictive and electrostrictive phase. Remarkably, a small amount (3 wt%) of nanofibers in the nanocomposite films enables a synergistic output effect of magnetoelectric coupling coefficient of 43.0 mV·cm −1 ·Oe −1 . The incorporation of ultra-fine and low-content nanofillers contributes to the lightweight and flexible nature of the nanocomposite films with the elongation at a break of 9 %. Moreover, the magneto-machine-electric conversion shows 7 % enhancement with a magnetic field application to verify the active effect of the magnetic field on strain response. This approach opens up a new avenue for the design and modulation of flexible magnetoelectric films and paves the way for wireless and wearable multifunctional devices.
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Reaction Chemistry & Engineering
·
2025
·
IF 3.1
Liping Luo,Wenxuan Wu,Yanan Shen,Yuheng Tao,Liqun Wang,Qing Qing
High-value valorization of cellulose and hemicellulose fractions in lignocellulosic biomass is crucial for a feasible biomass refinery scheme. In this study, an integrated strategy was developed for pretreatment of corncob and coproduction of furfural and high-concentration fermentable sugars. The hemicellulose fraction in raw corncob was selectively extracted to produce a xylose-rich hydrolysate via pretreatment with dilute p-toluenesulfonic acid (p-TsOH) under optimal reaction conditions (0.5% p-TsOH, 160 °C, and 30 min). Thereafter, the xylose hydrolysate was subjected to catalytic conversion in a DES (TEBAC : LA = 1 : 4) system at 190 °C for 10 min. Notably, 78.6% furfural yield was achieved, and the corresponding xylose conversion was close to 100.0%. In addition, the pretreated corncob residue exhibited excellent enzymatic digestibility as the yields of reducing sugar and glucose were 90.7% and 97.0%, respectively, at a high solid loading of 12%. This proposed approach represents an integrated strategy for coproduction of multiple products from agriculture residues.
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MACROMOLECULES
·
2014
·
IF 5.927
Mao Peng,Guohua Xiao,Xinglei Tang,Yang Zhou
Molecular composites comprising poly(p-sulfophenylene terephthalamide) (sPPTA), a sulfonated polyaramid rigid-rod polyelectrolyte, and flexible-chain poly(vinyl alcohol) (PVA) were prepared by a green and easy-to-scale-up water casting method. Influence of sPPTA on the microstructure and properties of the molecular composites was systematically investigated. Fourier transform infrared spectroscopy confirms the existence of hydrogen bonding between sPPTA and PVA. Wide-angle X-ray diffraction patterns do not show the characteristic of neat sPPTA crystalline aggregates in the composites even when the sPPTA content is as high as 33 wt %, suggesting that the strong interaction between sPPTA and PVA prevents the self-aggregation of sPPTA and leads to the formation of PVA/sPPTA complexes inside the composites. Transmission electron microscopy shows that sPPTA has good compatibility with PVA, and nanoscale fibril-like supramolecular assemblies dispersing uniformly in the composites become observable with the increase of sPPTA content. Moreover, the PVA/sPPTA complexes have a strong effect on the melt point, crystallinity, mechanical properties, and thermal stability of PVA. The PVA/sPPTA composites exhibit both high strength and high ductility. When the content of sPPTA is 5 wt %, the PVA/sPPTA composite exhibits the best mechanical properties, with a tensile strength of 169 ± 13 MPa, which is 54% higher than that of neat PVA (110 ± 10 MPa). Surprisingly, the reinforcement factor is even superior to that of multiwalled carbon nanotubes, vapor grown carbon fibers, and nanodiamonds previously reported for the reinforcement of PVA nanocomposites. Moreover, the PVA/sPPTA molecular composites have a relatively low modulus but a much larger elongation at break than prefabricated nanocomposites, showing good ductility. The strong and tough PVA/sPPTA molecular composites can be potentially used as high performance membranes or fibers in the future.
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JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2019
·Vol. 53
·期 5
·055504
·
IF 2.829
Shixin Wei,Qiong Fu,Yang Liu,Qian Ji,Yafei Hou,Laihui Luo,Weiping Li
An enhanced energy storage ability, under a low operating electric field, was achieved in Fe3O4@TiO2-P(VDF-HFP) composite films. The low conductivity TiO2 layer was coated onto the high polarization Fe3O4 to construct Fe3O4@TiO2 core–shell fillers for decreasing filler fraction and alleviating conductivity contrast. For instance, the 2 vol.% Fe3O4@TiO2-P(VDF-HFP) film shows a discharged energy density and energy efficiency of 8.6 J cm−3 and 61.7%, respectively, under a low operating electric field of 261.9 kV mm−1. The coated TiO2 and modified –OH groups not only restrict the adverse effects (such as high conductivity, easy agglomeration, etc) caused by Fe3O4, but also contribute greatly to the improvement of polarization and breakdown strength, leading to a significantly improved energy storage performance. Additionally, the present work might possess great potential applications for energy storage owing to the low filler fraction, simple, and low electric filed operation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xiaofei Zhou,Guijuan Wei,Chang Liu,Qian Zhao,Hui Gao,Wenbo Wang,Xixia Zhao,Xin Zhao,Honglei Chen
The production of hydrogen through seawater electrolysis has recently garnered increasing concern. However, hydrogen evolution reaction (HER) by alkaline seawater electrocatalysis is severely impeded by the slow H 2 O adsorption and H* binding kinetics at industrial current densities . Herein, a face-centered cubic/hexagonal close packed (fcc/hcp) NiRu alloy heterojunction was fabricated on Ni foam (N doped NiRu-inf/NF) by a low-temperature nitrogen plasma activation. Simultaneously, nitrogen atoms are introduced into the alloy to facilitate d-p hybridization. When N doped NiRu-inf/NF is integrated into a dual-electrode cell for urea-assisted seawater electrolysis, it achieves 100 mA cm −2 with an ultra-low voltage of 1.36 V and excellent stability. Density functional theory (DFT) verifies that the robust d-p hybridization among Ni, Ru and N exhibits more energy level matching for H 2 O molecule adsorption at the Ru sites, while simultaneously reducing the interaction between H* and Ni sites in N -doped NiRu-inf.
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NANOTECHNOLOGY
·
2020
·Vol. 31
·期 14
·145717
·
IF 3.551
Wei Yue,Meifeng Hao,Bin Yu,Ruizhuo Ouyang,Yuqing Miao
The synthesis of inorganic micro-/nano-materials by dry combustion is somewhat dangerous since it is performed under high temperature. The ultrathin Bi nanofilms with 3D structures were synthesized using a safe approach of non-combustion explosion in H2O/DMF solution at room temperature and atmospheric pressure. The violent reaction between H2O2 and NH3 · H2O resulted in a non-combustion explosion due to the fast evolution of gases. Then under high temperature and high pressure during solvothermal process, the further slight explosion occurred where the oxygen-containing molecules of H2O2 and NO3− acted as oxidants, while the hydrogen-containing molecules of NaBH4, NH3 · H2O and DMF acted as reductants. The release of gases was accompanied with BiIII reduction by NaBH4. The 3D structure of ultrathin Bi nanofilms with many void spaces formed due to the explosive force and foams from the sharp liberation of gases. Such ultrathin Bi nanofilms with 3D structure exhibited outstanding catalytic activity for p-nitrophenol hydrogenation which is important to treat the environmental pollution from p-nitrophenol discharge. Within only several seconds p-nitrophenol hydrogenation was completed without delay. The non-combustion explosion exhibits potential applications for the synthesis of 3D ultrathin film materials as high efficient catalysts.
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MICROCHIMICA ACTA
·
2012
·Vol. 179
·期 1
·171-177
·
IF 3.033
Yi Wen Jiao,Li Yang,Ran Gu,Luo Hong Qun,Li Nian Bing
We have developed a sensor for the square wave anodic stripping voltammetric determination of Pb(II). A glassy carbon electrode was modified with a thin film of an antimony/poly(p-aminobenzene sulfonic acid) composite in air-saturated aqueous solution of pH 2.0. Compared to a conventional antimony film electrode, the new one yields a larger stripping signal for Pb(II). The conditions of polymerization, the concentration of Sb(III), the pH value of the sample solution, the deposition potential and time, frequency, potential amplitude, and step increment potential were optimized. Under the optimum conditions, a linear response was observed for Pb(II) in the range of 0.5 to 150.0 μg L −1 . The detection limit for Pb(II) is 0.1 μg L −1 .
The surface of a glassy carbon electrode (GCE) was modified by electropolymerization of p-aminobenzene sulfonic acid (p-ABSA) and the modified electrode was then prepared by in situ depositing antimony and target metal on the poly(p-ABSA) coated glassy carbon electrode. The antimony/poly(p-ABSA) film electrode displays high electrochemical activity in giving a peak current that is proportional to the concentration of Pb(II) in a certain range.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2017
·Vol. 77
·期 1
·91-100
·
IF 1.197
Chen Dan,Zhou Jun,Wang Hongyu,Yang Kai
There is an increasing need to explore effective and clean approaches for hazardous contamination removal from wastewaters. In this work, a novel bead adsorbent, polyvinyl alcohol–graphene oxide (PVA-GO) macroporous hydrogel bead was prepared as filter media for p -nitrophenol (PNP), dye methylene blue (MB), and heavy metal U(VI) removal from aqueous solution. Batch and fixed-bed column experiments were carried out to evaluate the adsorption capacities of PNP, MB, and U(VI) on this bead. From batch experiments, the maximum adsorption capacities of PNP, MB, and U(VI) reached 347.87, 422.90, and 327.55 mg/g. From the fixed-bed column experiments, the adsorption capacities of PNP, MB, and U(VI) decreased with initial concentration increasing from 100 to 400 mg/L. The adsorption capacities of PNP, MB, and U(VI) decreased with increasing flow rate. Also, the maximum adsorption capacity of PNP decreased as pH increased from 3 to 9, while MB and U(VI) presented opposite tendencies. Furthermore, the bed depth service Time (BDST) model showed good linear relationships for the three ions' adsorption processes in this fixed-bed column, which indicated that the BDST model effectively evaluated and optimized the adsorption process of PVA-GO macroporous hydrogel bead in fixed-bed columns for hazardous contaminant removal from wastewaters.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Nanke Ma,Yuwei Chen,Liya Wang,Ping Tan,Nayu Chen,Yuan Jin,Jian Song,Guangli Li
Conductive hydrogels have garnered significant attention for flexible electronics, yet simultaneously achieving optimal mechanical robustness and electrical performance under harsh conditions remains challenging. Herein, an ion/electron dual-mode conductive Ag/AgCl@Agar/P(AM- co -HEAA) hydrogel was developed for wearable motion detection and electrophysiological signal monitoring. The hydrogel exhibited outstanding mechanical properties, including excellent stretchability (2207 %), high tensile stress (0.32 MPa), and remarkable toughness (3.90 MJ/m 3 ). As a strain sensor, it displayed high sensitivity (GF of 4.17 within 1100–1400 % strain), stable and reproducible resistance signal output across both micro-strains (0.01–0.1 %) and macro-strains (200–1400 %), and excellent working durability and reliability (200 cycles at 200 % strain). Notably, it also demonstrated reliable sensing performance even at −20 °C due to the ion/electron hybrid conductive mechanism. These unique properties enabled the hydrogel successfully applied in real-time human motion detection and human-machine interaction. Moreover, the hydrogel semi-dry electrodes displayed low potential drift (4.64 μV/min) and electrode-scalp impedance (13.2 ± 1.6 kΩ at 10 Hz). Significantly, the hydrogel electrodes achieve clinical-grade ECG and EEG signal acquisition, comparable to commercial wet electrodes. These superior properties, combined with facile fabrication, make this multifunctional hydrogel a promising candidate for next-generation wearable devices in motion monitoring and human–machine interactions.
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PubMed
高影响因子
Materials Advances
·
2025
·
IF 4.7
Xinxin Li,Lianjie Du,Zhou Wan,Doudou Xu,Chen Liu
In this study, novel ZnO/BiOI/AgI ternary heterojunction photocatalysts were synthesized via a facile precipitation method to address challenges in organic pollutant degradation and microbial disinfection under visible light irradiation. The composites were systematically characterized (XRD, SEM, TEM, XPS, BET, UV-vis DRS, and PL), showing significantly enhanced visible light absorption, efficient charge carrier separation, and superior photocatalytic performance, compared to binary and single-component counterparts. The optimized ZnO/BiOI/AgI-3030 sample achieved 98.1% degradation of Rhodamine B (RhB) and 59.1% degradation of Norfloxacin (NOR) within 3 hours, attributed to the synergistic effects of the heterojunction structure, which facilitated efficient charge transfer and promoted the generation of reactive oxygen species (ROS). Furthermore, the composite demonstrated remarkable antibacterial activity against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and methicillin-resistant Staphylococcus aureus (MRSA), with bactericidal rates exceeding 99.8%. Cytotoxicity assays revealed 88.79% inhibition of DLD-1 colorectal cancer cells. Mechanistic studies confirmed the formation of a unique n–p–n heterostructure, enabling effective charge carrier separation and strong redox capabilities. Additionally, the photocatalysts exhibited excellent stability and reusability over four consecutive degradation cycles, maintaining high catalytic efficiency. These findings underscore the potential of ZnO/BiOI/AgI ternary composites as efficient and sustainable photocatalysts for environmental remediation and antimicrobial applications.
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MOLECULAR NEUROBIOLOGY
·
2022
·Vol. 59
·期 9
·5612-5629
·
IF 5.682
Cao Shu-qin,Aman Yahyah,Fang Evandro F.,Tencomnao Tewin
Alzheimer’s disease (AD) is a common and devastating disease characterized by pathological aggregations of beta-amyloid (Aβ) plaques extracellularly, and Tau tangles intracellularly. While our understandings of the aetiologies of AD have greatly expanded over the decades, there is no drug available to stop disease progression. Here, we demonstrate the potential of Passiflora edulis ( P. edulis ) pericarp extract in protecting against Aβ-mediated neurotoxicity in mammalian cells and Caenorhabditis elegans ( C. elegans ) models of AD. We show P. edulis pericarp protects against memory deficit and neuronal loss, and promotes longevity in the Aβ model of AD via stimulation of mitophagy, a selective cellular clearance of damaged and dysfunctional mitochondria. P. edulis pericarp also restores memory and increases neuronal resilience in a C. elegans Tau model of AD. While defective mitophagy-induced accumulation of damaged mitochondria contributes to AD progression, P. edulis pericarp improves mitochondrial quality and homeostasis through BNIP3/DCT1-dependent mitophagy and SOD-3-dependent mitochondrial resilience, both via increased nuclear translocation of the upstream transcriptional regulator FOXO3/DAF-16. Further studies to identify active molecules in P. edulis pericarp that could maintain neuronal mitochondrial homeostasis may enable the development of potential drug candidates for AD.
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PubMed
高影响因子
Results in Engineering
·
2025
·
IF 7.9
Ning Wang,Yingqi Luo,Xiaoxiao Yang,Hejia Sun,Yonghong Liu,Yunfeng Li
The pervasive contamination of water bodies by antibiotics necessitates the development of efficient remediation technologies. Herein, A visible-light-responsive BiOI/TiO 2 p-n heterojunction photocatalyst was engineered through a facile solvothermal approach, achieving exceptional oxytetracycline (OTC) degradation in simulated complex aquatic environments. The optimized BiOI/TiO 2 (2:1) composite degraded 92.8% of 20 mg/L OTC within 90 min––2.3-fold and 3.1-fold faster than pristine BiOI and TiO 2 , respectively––while exhibiting a record-high specific degradation rate ((SDR): 5.16×10⁻ 5 mg/(g·W·min)). Systematic characterizations (XPS/EIS/EPR) revealed that the built-in electric field at the p-n interface spatially separates charges, suppresses recombination by 54.5%, and extends carrier lifetime. Crucially, the composite maintained >85% efficiency in saline (0.1 M NaCl) and organic-rich water (20 mg/L HA), with <6% activity loss after 5 cycles due to Bi-O-Ti interfacial stabilization (XRD/ICP-MS). Mechanistic studies identified dual reactive pathways: h + -directed oxidation (primary) and ·O 2 ⁻-mediated cleavage (secondary), achieving >70% mineralization (TOC). This work provides a scalable interfacial engineering strategy for designing robust photocatalysts applicable to antibiotic-contaminated wastewater.
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