POLYMER
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2025
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IF 4.5
Jinghang Zhu,Jiahao Shen,Haitong Zhao,Honghong Luo,Yiqun Fang,Weihong Wang,Yongming Song,Qingwen Wang
s With growing global resource constraints and environmental concerns, sustainable and eco-friendly characteristics have made bio-based materials the focus of considerable attention. In this work, a novel bio-based composite intumescent flame retardant (SVDP), incorporating P, N, and S as flame-retardant elements, was prepared through Schiff base condensation, addition reaction, and electrostatic ionic interaction, employing phytic acid, vanillin, sulfonamide, and 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide as precursors. SVDP was introduced into polypropylene-based wood-plastic composites (WFPP) to enhance flame retardancy and smoke suppression performance. Relative to the neat WFPP, the incorporation of 20 wt% SVDP increased the limiting oxygen index (LOI) to 27.2%, while the peak heat release rate (PHRR) decreased by 23.3% and the total heat release (THR) declined by 25.8%. Even at low loadings, SVDP demonstrated notable smoke suppression effects. The flame-retardant mechanism of the SVDP/WFPP system was comprehensively investigated using TG-FTIR, Raman spectroscopy, SEM, and other characterization techniques. By employing a multifunctional bio-based composite flame retardant, this work provides an eco-friendly and efficient strategy to strengthen the fire-retardant performance of wood-plastic composites.
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高影响因子
BIOSENSORS & BIOELECTRONICS
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2025
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IF 10.5
Yujie Liu,Xinyu Zhang,Haomin Chen,Ziling Yuan,Xiujuan Tian,Nan Xu,Ruihua Liu,Chao Yang
The previously constructed biosensors for organophosphate pesticides (OPs) detection cannot be used to measure OPs concentrations under high salt conditions. In this study, a novel halotolerant whole-cell biosensor J9U-pBBR- pobRA - gfp , which consisted of a p -nitrophenol (pNP)-responsive transcription regulator PobR and its cognate promoter fused to a reporter GFP, was constructed from a salt-tolerant chassis Halomonas cupida J9 for pNP-substituted OPs detection in high-salinity environments. Through dynamic regulation of PobR expression levels, the leaky fluorescence was significantly reduced. Furthermore, the optimized biosensing circuits were introduced into an OP-degrading chassis J9U- mpd , to generate dual-functional biosensors that could degrade 40 μM methyl parathion (MP) within 80 min in high-salinity media. The biosensors exhibited broad specificity towards pNP-substituted OPs (e.g., MP and fenitrothion), while showing no response to non-pNP-substituted OPs like chlorpyrifos. Dose-response curves indicated that the three biosensors J9U- mpd -pBBR-P3 (P15 or P17) pobRA - gfp maintained a linear detection range of 0.1–60 μM for pNP and 0.1–20 μM for MP in high-saline media. Biosensors J9U- mpd -pBBR-P3 (or P17) pobRA - gfp achieved a low detection limit (LOD) of 0.1 μM for both pNP and MP in seawater and high-salinity river water, and showed a LOD of 0.019 mg/kg for pNP and 0.026 mg/kg for MP in saline-alkali soil. pNP and MP concentrations estimated by the biosensors J9U- mpd -pBBR-P3 (or P17) pobRA - gfp matched well with pollutant concentrations measured by HPLC analysis, demonstrating the reliability of the biosensor detection results. The halotolerant biosensor can be applied to efficient degradation and precise quantification of OPs in hypersaline aquatic and terrestrial ecosystems. Our strategy of combining synthetic biology with extremophile chassis may be utilized to create novel biosensors for pollutant detection in extreme environments.
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PubMed
高影响因子
SOLID STATE IONICS
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2025
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IF 3.3
Yongsheng Chen,Siman Yang,Jianbin Zheng,Mingwei Hu,Mingdeng Wei,Peixun Xiong
As an excellent cathode material, lithium iron phosphate (LiFePO 4 ) has been widely used in commercial lithium-ion batteries (LIBs). However, the impact of synthetic conditions on LiFePO 4 cathode derived from amorphous iron phosphate (FePO 4 ) remains underexplored. In the present study, the effects of Li/P molar ratio on the crystallinity and electrochemical properties of LiFePO 4 were investigated in detail using FePO 4 as a precursor. When the Li/P molar ratio in LiFePO 4 was approximately 1, the material exhibited an excellent long-term cycling stability with a high capacity retention of 97 % after 500 cycles. In addition, multiple characterizations demonstrate that the higher molar ratio of the Li/P resulted in the higher concentration of defects in LiFePO 4 crystals, which not only reduced the reversible capacity but also compromised the structural stability, leading to a poor cyclic stability and quick capacity degradation. Therefore, such a work could provide a scientific insight for rational design and synthesis of high-performance LiFePO 4 cathodes from amorphous FePO 4 precursor.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Nengcui Zhang,Yimin Zhang,Feng Wu,Ziyan Liu,Xinyu Xu,Qiang Li,Yi Mei,Yun Zu
Phosphorus (P)-doping H-ZSM-5 zeolites, which is crucial for industrial applications, aim to adjust both acidity and framework stability while optimizing product distribution in heterogeneous catalysis. Nonetheless, current phosphating methods often suffer from inadequate phosphorus dispersion and unclear interfacial interactions with framework aluminum (Al). In this work, P-doping ZSM-5 zeolites were successfully one-step prepared by using tributylphosphine served as an organophosphorus precursor, assisting by density functional theory calculations. On account of this, a stable interface of tetracoordinated-phosphorus and framework Al was fabricated uniformly. Such an interfacial structure not only made more framework Al sit in the straight/sinusoidal channels, but also remodeled Brønsted acid sites and reinforced its acidity. Under comparable conditions, methanol-to-propylene (MTP) evaluations indicated that the high-silica PZ-75 zeolite catalyst displayed an appreciable catalytic lifetime (30 h) and a higher C 3 H 6 selectivity (52.4 %). Additionally, in-situ Fourier transform infrared spectroscopy further revealed that this exceptional MTP performance was attributable to the predominant olefinic pathway and lower hydrogen transfer ability. These results provide valuable information for cognizing phosphorus-zeolite chemistry and creating high-performance MTP catalytic materials.
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PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2025
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IF 8.9
Wei-Chen Zhou,Shuang He,Ze-Yong Zhao,Cong Deng,Yu-Zhong Wang
The intrinsic flammability of polypropylene (PP)—a pivotal thermoplastic in automotive engineering—poses a significant safety challenge amid the accelerating shift toward new energy transportation. However, achieving high flame retardancy without compromising mechanical performance remains a critical challenge due to the poor compatibility between non-polar PP and polar flame retardants—a dilemma known as the “performance paradox.” In this study, we report the design of a novel flame retardant, BAPPAM, featuring adaptive interfaces, constructed through the ionic complexation of hyperbranched semi-aromatic polyamide-amine (BA-PAMAM) with phytic acid, followed by sol–gel-based silane encapsulation to yield a phosphorus–nitrogen–silicon hybrid architecture. Benefiting from the synergistic effects among P, N, and Si elements, BAPPAM endows PP composites with outstanding flame retardancy—achieving a limiting oxygen index of 28.5 %, UL-94V-0 rating, and effective suppression of heat release (86 % reduction in peak heat release rate and 69 % decrement in total heat release) and smoke emission (72 % decline in peak smoke production rate and 67 % slippage in total smoke production) at a 20 wt% loading. Remarkably, the adaptive interfaces formed by BAPPAM accommodate mechanical deformation under stress, affording a high elongation at break (up to 453.4 %) comparable to pure PP, along with enhancements of 41.2 % in Young’s modulus (1440 MPa) and 11.2 % in impact strength (3.9 kJ/m 2 ). This work pioneers a novel interfacial engineering strategy that reconciles fire safety with mechanical robustness, offering a solution for the next generation of high-performance, flame-retardant polyolefin composites.
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高影响因子
Biomed Research International
·
2022
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IF 3.246
Yan Xu,Mingwei Cheng,Peijun Zhu,Shuo Yang,Chunhua Lai,Shulan Xu
During bone tissue regeneration, neovascularization is critical, and the formation of a blood supply network is crucial for bone growth stimulation and remodeling. Previous studies suggest that bioelectric signals facilitate the process of angiogenesis. Owing to their biomimetic electroactivity, piezoelectric membranes have garnered substantial interest in the field of guided bone regeneration. Nevertheless, the knowledge of their influence due to varying surface potentials on the progression of angiogenesis remains ambiguous. Therefore, we proposed the preparation of an electroactive material, P(VDF-TrFE), and investigated its effects on the activity and angiogenic functions of human umbilical vein endothelial cells (HUVECs). The HUVECs were directly cultured on P(VDF-TrFE) membranes with different surface potentials. Subsequently, cell viability, proliferation, migration, tube formation, and expressions of related factors were assessed through appropriate assays. Our results revealed that the negative surface potential groups exerted differential effects on the modulation of angiogenesis in vitro. The P(VDF-TrFE) membranes with negative surface potential exhibited the greatest effect on cellular behaviors, including proliferation, migration, tube formation, and promotion of angiogenesis by releasing key factors such as VEGF-A and CD31. Overall, these results indicated that the surface potential of piezoelectric P(VDF-TrFE) membranes could exert differential effects on angiogenesis in vitro. We present a novel approach for designing bioactive materials for guided bone regeneration.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yu Huang,Guoping Zhu,Zhennan Wang,Yadong Wang,Zongmin Zhu
This study designed and synthesized a novel phosphorus silicon synergistic flame retardant PDD. Only adding 1 wt% PDD can achieve excellent UL-94 V-0 flame-retardant rating for PLA composite, and the limit oxygen index (LOI) can be increased to 26.8 %. At the same time, the thermal stability and crystallinity of composites are significantly improved. The results of the cone calorimeter test show that compared with pure PLA, PLA/1 % PDD reduces the peak heat release rate (pHRR), total heat release (THR), and peak of CO 2 release rate (pCO 2 P) by 38.2 %, 42.9 %, and 26.6 %, respectively. It is worth noting that PDD not only enhances the tensile strength and impact toughness of PLA composites, but also accelerates their chemical degradation process in alkaline environments through ester bond hydrolysis promoted by phosphorus silicon synergy. This work has achieved a multifunctional integration of mechanical properties, efficient flame retardancy, and chemical degradation, providing new ideas for the development of multi-functional biodegradable polymers.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2015
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IF 2.587
Zhiqiao He,Lixian Jiang,Da Wang,Jianping Qiu,Jianmeng Chen,Shuang Song
A series of fluorinated anatase TiO2 nanosheets with dominant {001} facets were synthesized to oxidize p-chlorophenol (PCP) and reduce Cr(VI) simultaneously under visible light. The {001}/{101} surface facets ratio of TiO2 was controlled by varying the initial HF concentration, and fluorine-free samples were obtained by alkaline-washing. A synergistic effect among TiO2, Cr(VI), and PCP was observed, which is ascribed to effective trapping of photogenerated electrons and holes by Cr(VI) and PCP, respectively. A maximum synergistic effect was obtained at a molar ratio of [PCP] to [Cr(VI)] of one. Using X-ray diffraction, X-ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, field-emission scanning electron microscopy, transmission electron microscopy, and Brunauer–Emmett–Teller analyses, the optimum ratio of exposed {001} to {101} facets for TiO2 was determined to be 80:20 because of selective transfer and charge balance of photogenerated carriers. Surface fluorination facilitates the formation of oxygen vacancies and unsaturated Ti atoms, which is useful for visible light activity induction, extending the lifetime of photogenerated electron-hole pairs, and enhancing the rate of PCP oxidation and Cr(VI) reduction.
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2017
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IF 3.154
Dezhen Wang,Wentao Zhu,Yao Wang,Jin Yan,Miaomiao Teng,Jiyan Miao,Zhiqiang Zhou
Previous studies have demonstrated the endocrine disruption of o,p′-DDT. In this study, we used a 1H NMR based metabolomics approach to investigate the estrogenic effects of o,p′-DDT (300 mg/kg) on the uterus and brain after 3 days of oral gavage administration, and ethynylestradiol (EE, 100 μg/kg) was used as a positive control. A supervised statistical analysis (PLS-DA) indicated that o,p′-DDT exerted both estrogenic receptor-(ER)-dependent and independent effects on the uterus but mainly ER-independent effects on the brain at metabolome levels, which was verified by coexposing with the antiestrogenic ICI 182,780. Four changed metabolites—glycine, choline, fumarate, and phenylalanine—were identified as ER-independent alterations in the uterus, while more metabolites, including γ-aminobutyrate, N-acetyl aspartate, and some amino acids, were disturbed based on the ER-independent mechanism in the brain. Together with biological end points, metabolomics is a promising approach to study potential estrogenic chemicals.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2019
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IF 7.65
Jaehyeong Park,Sungjun Bae
In this study, a magnetically recyclable Pd catalyst was developed by using the novel support of iron-rich coal fly ash/silica (IRFA@SiO 2 ) for highly efficient reduction of p -nitrophenol ( p -NP). IRFA microspheres were coated with amorphous SiO 2 synthesized from non-magnetic coal fly ash (NMFA) and then loaded with Pd by impregnation method for the synthesis of Pd/IRFA@SiO 2 . Various surface analyses demonstrated that amorphous SiO 2 was well deposited on the surface of IRFA, providing a unique three-dimensionally structured SiO 2 layer to suppress aggregation of IRFA and enhance dispersion of Pd nanoparticles. Pd/IRFA@SiO 2 exhibited a significantly enhanced p -NP reduction than those of Pd/IRFA, Pd/Al 2 O 3 , and Pd/SiO 2 . Compared to other Pd- and metal-loaded catalysts, Pd/IRFA@SiO 2 showed ˜4000× enhancements in k obs-p-NP /C M (L min −1 g M −1 , M = precious metals) values and ˜3800× increases in price-normalized k obs-p-NP values, indicating that Pd/IRFA@SiO 2 is a highly efficient and cost-effective alternative catalyst. The catalyst was successfully recycled five times without significant leaching of Pd, Si, and heavy metals because of the magnetic property of Pd/IRFA@SiO 2 . The experimental results suggest the applicability of the surface-modified IRFA support for the development of novel magnetically recoverable catalysts without severe toxicity problems.
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高影响因子
POLYMER TESTING
·
2019
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IF 2.943
Xuan Yang,Qunzhang Tu,Xinmin Shen,Ming Pan,Chengming Jiang,Pengxiao Zhu,Yi Li,Pei Li,Caibing Hu
In order to improve the interfacial adhesion between the poly(p-phenylene terephthalamide) fibers and rubber matrix while enhance the fiber strength simultaneously, a mild surface modification method was presented to graft polydopamine-polyethyleneimine/graphene oxide (PDA-PEI/GO) multilayer films onto the fiber surface. In this way, PDA could be first non-covalently deposited onto the fiber surface via dopamine biomimetic modification, and then the positively charged PEI was absorbed on the PDA through Michael addition reaction. After that, the negatively GO was grafted on the surface by the layer-by-layer (LbL) assembly to construct the PDA-PEI/GO multilayer films. The results of mechanical properties tests and pull-out force tests showed that the highest single-filament tensile strength and the highest pull-out force of the modified fibers increased by 15.1% and 78.1%, respectively. The optimal time of PEI/GO multilayer for the enhancement of adhesive properties was 7 and the excessive amount of PEI/GO would lead to high aggregation to decrease the adhesive strength.
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高影响因子
LANGMUIR
·
2024
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IF 3.7
Yujie Huang,Binyao Liu,Yiwen Yang,Hao Xiao,Tao Han,Hanmei Jiang,Jiahe Li,Yong Zhou,Gaili Ke,Huichao He
Water oxidation is an endothermic and kinetics–sluggish reaction; the research of photoanodes with photothermal and cocatalytic properties is of great significance. Herein, BiVO4/CoAl2O4 film photoanodes were studied for solar water splitting through coupling spinel p-type CoAl2O4 nanoparticles on n-type BiVO4 films. Compared to the BiVO4 photoanode, better performance was observed on the BiVO4/CoAl2O4 photoanode during water oxidation. A photocurrent of 3.47 mA/cm2 was produced on the BiVO4/CoAl2O4 photoanode at 1.23 V vs RHE, which is two-fold to the BiVO4 photoanode (1.70 mA/cm2). Additionally, the BiVO4/CoAl2O4 photoanodes showed an acceptable stability for water oxidation. The BiVO4/CoAl2O4 photoanode being of higher water oxidation performance could be attributed to the presence of p–n heterojunction, cocatalytic, and photothermal effects. In specific, under the excitation of λ < 520 nm light, the holes produced in/on BiVO4 can be transferred to CoAl2O4 owing to the p–n heterojunctions of BiVO4/CoAl2O4. Meanwhile, the temperature on the BiVO4/CoAl2O4 photoanode rises quickly up to ∼53 °C under AM 1.5 G irradiation due to the photothermal property of CoAl2O4 through capturing the 520 < λ < 720 nm light. The temperature rising on the BiVO4/CoAl2O4 photoanode improves the cocatalytic activity of CoAl2O4 and modifies the wettability of BiVO4/CoAl2O4 for effective water oxidation.
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高影响因子
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