ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Long Ni,Xiaoting Liao,Ke Yang,Hang Ye,Hexing Sun,Yinfu Luo,Liwei Yan,Shuang Xia,Mei Liang,Shengtai Zhou,Huawei Zou
In this work, the fabrication of lightweight, hydrophobic, and high-temperature thermal insulative polyimide foam-derived carbon foams (PICFs) with an anisotropic pore structure was proposed. First, polyester ammonium salt (PEAS) precursor powders with different component moieties were synthesized by a copolymerization method. Then, the PEAS powders were subjected to microwave-assisted foaming, thermal imidization, and carbonization processes to prepare PICFs. The “bottom-up” directional foaming behavior and high carbon yield of polyimide foams (PIFs) constructed regular honeycomb-like pores in the vertical direction and aligned ellipsoidal strip-like pores in the horizontal direction of the PICFs. Results showed that the PICFs possessed low density (20–40 kg/m3), small pore size (128 μm), favorable mechanical properties (compressive strength of 86.01 kPa) and excellent thermal stability (T5% > 800 °C). By combining micro/nano porous structures with reduced pore diameters, the PICFs exhibited excellent hydrophobicity, with a water contact angle of up to 128.8° in the vertical direction and 121.2° in the horizontal direction. The PICFs demonstrated superior thermal insulation properties at both room temperature and high temperatures, with thermal conductivity values ranging from 0.0335 to 0.1887 W/(m·K) between 25 and 1000 °C. Thus, lightweight, hydrophobic, and high-temperature thermal insulative PICFs were successfully prepared using the proposed method, which has potential applications in high-end engineering fields such as aerospace, transportation, microelectronics, and nuclear energy sectors, among others.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xin Tang,Ruipeng Mao,Fan Zhang,Yongzhong Jin,Wei Su,Wu Jiang,Junhao Wang
Cemented carbides play a pivotal role in diverse industrial sectors, and controlling abnormal grain growth and regulating the homogeneity of the Co binder phase are the key challenges to improve their properties. In this study, WC-10Co alloy was prepared for the first time by low-pressure sintering technique using (Ti, Cr, V, Nb, Mo)(C, N) high entropy powder as an inhibitor, focusing on the effect of trace additions of (Ti, Cr, V, Nb, Mo)(C, N) on the microstructure and mechanical properties of the alloy as well as friction and wear properties. The results show that under the conditions of sintering at 1420 ℃, a pressure of 3 MPa, and a holding time of 1 hour, the alloy with 0.2 wt.% high-entropy inhibitor exhibited the best comprehensive properties, with a flexural strength of 3752 MPa, a Vickers hardness of 1679 HV 30 , and a fracture toughness of 13.07 MPa·m 1/2 . During the stable stage of tribological testing, the average friction coefficient reached 0.6195, and the wear rate was as low as 1.34×10 -7 mm 3 /(N·m). The toughening and strengthening mechanism of the (Ti, Cr, V, Nb, Mo)(C, N) - modified alloy is mainly attributed to the significant refinement of WC grains, WC lattice contraction, and the formation of Co-based solid solutions by the high-entropy inhibitor. However, excessive addition deteriorates the overall performance. This study provides experimental data and technical insights for the development of a new generation of cemented carbides with high strength, high toughness, and excellent wear resistance.
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JOURNAL OF SOLID STATE CHEMISTRY
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2025
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IF 3.5
Jie He,Wei Xiong,Fupeng Liu,Zhicong Ni,Lin Zeng,Jiaming Liu,Xue Li
Transition metal phosphides (TMPs) have emerged as promising high-capacity anode materials for lithium-ion batteries (LIBs). However, their practical application remains constrained by the dual challenges of intrinsic low conductivity and structural degradation during cycling. In this study, CoP/C composites with hollow spherical (denoted as s-CoP/C) and sea urchin-like (u-CoP/C) morphologies were synthesized in a morphology-controlled manner using sodium citrate as a structure directing agent, aiming to elucidate the structure-performance relationship in lithium storage. Systematic characterization reveals the hollow spherical architecture of s-CoP/C effectively enhances charge transfer kinetics and buffered volume variations during cycling, outperforming its u-CoP/C counterpart. As a result, s-CoP/C delivered a stable reversible specific capacity of 527.5 mAh g −1 after 600 cycles at 1 A g −1 . Kinetic analysis demonstrates a dominant pseudocapacitive contributes of 85.6 % at a sweep rate of 1.5 mV s −1 . In addition, robust interfacial chemical bonding between CoP and carbon matrix through C–P and Co– O –C linkages ensures structural integrity during prolonged cycling. This work establishes a synergistic strategy combining morphological engineering with interfacial optimization to develop durable TMP-based anodes for advanced energy storage systems.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Di Liu,Yan Wang,Xue He,Shasha Liu,Wei Kong,Hui Zhang,Qiyao Chen,Zhenxia Song,Hai Tang
Ultrafiltration is widely employed for the advanced treatment of real textile wastewater; however, it encounters significant challenges of low separation efficiency and severe membrane fouling caused by residual organic matter (DOM) present in the conventionally treated biodegradable effluent. This study developed a blending membrane by incorporating cobalt-carbon (Co-C) nanocomposites, derived from ZIF-67, with polyvinylidene fluoride (PVDF) for synergistic filtration and peroxymonosulfate (PMS)-activated radical oxidation of real textile wastewater. The results indicate that an efficient removal of 62.9 % of total organic carbon-based DOM was achieved through online filtration-oxidation at a PMS concentration of 0.5 g/L, which is 3.7 times greater than the performance of pristine PVDF filtration. Furthermore, the system exhibited exceptional antifouling properties, evidenced by a flux recovery rate (FRR) of 71.2 % and a reduction in irreversible fouling ratio (R ir =22.7 %), attributed to the in-situ oxidative degradation of foulants. Molecular-level analysis using three-dimensional fluorescence excitation-emission matrix and fourier transform ion cyclotron resonance mass spectrometry revealed that SO 4 •− /•OH radicals preferentially degraded aromatic DOM components. The membrane’s surface roughness reduction and loose foulant layer formation further alleviated fouling. This work provides a preliminary data for textile wastewater remediation and deepens the mechanistic understanding of catalytic membrane processes.
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Cell Reports
·
2025
·
IF 6.9
Mingfang Wang,Jia Zeng,Binbin Cui,Guangliang Wu,Xiayu Chen,Yikai Fu,Bing Gu,Yinyue Deng
It was previously demonstrated that intestinal pathogens have evolved different mechanisms to enhance their infection and colonization in the intestines of hosts. However, it is unclear how Shigella effectively survives in the presence of bile salts. Here, we report that the biofilm formation and pathogenicity of S . sonnei are induced by primary bile salts through the two-component system EvgS/EvgA. The response regulator EvgA controls the transcription of the cyclic AMP synthase-encoding gene. Furthermore, the effector protein CRP of the cyclic AMP (cAMP) signal not only positively controls the transcription of ydeH , a gene encoding cyclic di-GMP (c-di-GMP) synthase, but also forms a complex with YdeH to improve its catalytic production of c-di-GMP. Additionally, interacting with YdeH enhances the ability of CRP to bind to the promoter of ydeH . Our work provides insights into how S . sonnei utilizes cascade amplification of c-di-GMP to promote fitness and pathogenicity in response to primary bile salts.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mengli Zhou,Sichan Li,Haojie Tian,Xinyu Liu,Zhimin Wu,Qiying Liu,Jianchun Jiang
Levlinic acid (LA) and its derived γ-valerolactone (GVL) are the two important biomass derived platform molecules, which showed wide application in the fields of fine chemicals, drug and liquid fuel industrials. Considering the coupling of sequential steps for glucose to LA and GVL, selective production of LA and GVL via glucose one-pot conversion in water is an open challenge. Herein, we used metal chlorides as the acidic catalyst for glucose conversion to LA, obtaining the high yield of 77.8 C-mol% over SnCl 4 . Moreover, using the SnCl 4 and Ru/C as the combined catalyst, glucose or cellulose could be converted to GVL with the high yield of 60.1 or 57.9 C-mol% in the case of in situ hydrogenation by formic acid (the by-products during LA formation) decomposition. The formation of LA was responsible for the cooperative effect of BAS (Bronsted acid sites) and LAS (Lewis acid sites) of SnCl 4 for accelerating glucose isomerization, fructose dehydration followed by 5-hydroxymethyl furfural (HMF) rehydration, while the GVL production is relative to the highly efficient formic acid decomposition to H 2 followed by LA hydrogenation to GVL over Ru/C. This study provided an avenue for facile and highly efficient conversion of biomass and the derivatives to LA and GVL using commercial catalysts.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Yunle Yao,Rui Pan,Hua Cheng,Yi Gong,Lin Chen,Xian Zhang,Meng Xue,Xingyou Tian
Encapsulation is a crucial technology for isolating and protecting moisture-sensitive materials. However, traditional organic-inorganic composite films often exhibit poor adhesion at the interface and high gas permeability, making stable operation difficult. In this work, an enhanced atomic layer deposition (EALD) method was used to uniformly deposit a layer of thickness-controlled alumina on a Polyethylene Naphthalate (PEN) film with oxygen-containing polar groups(CTPEN) on its surface, successfully producing a high-barrier composite film (EALD-Al 2 O 3 /CTPEN) with Al-O-C chemical bonds. The designed CTPEN film significantly enhanced the adhesion of alumina, thereby improving the performance of the composite film. Moreover, the mechanical properties of the composite film were significantly enhanced, with the elongation at break of EALD-Al 2 O 3 /CTPEN at 72 % being considerably higher than that of ALD-Al 2 O 3 /PEN at 44 %, and the tensile strength reaching 220 MPa. At the same time, EALD-Al 2 O 3 /CTPEN maintained excellent light transmission, exceeding 85 %. Humidity -sensitive resistors encapsulated with EALD-Al 2 O 3 /CTPEN exhibited stable operating performance in both air and humidity-sensitive environments, confirming the superior barrier properties of the composite film. This EALD-Al 2 O 3 /CTPEN composite layer holds promise as a prospective encapsulation layer for future flexible devices.
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Advanced Industrial and Engineering Polymer Research
·
2025
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IF 12
Zijian Zhao,Zhenyang Zheng,Kaixiang Chen,Mengqi Ma,Mingqiu Zhang,Wenhong Ruan
Silicon anodes have been extensively researched due to their high capacity and potential to revolutionize energy storage. However, during lithiation and delithiation cycles, the volume expansion of silicon anodes can lead to mechanical damage and significant capacity decay. To address this issue, three-dimensional polymer binders have been introduced to suppress volume changes by providing mechanical support. Although cross-linking in these binders improves their robustness, current options with high molecular weights and cross-linked structures are not biodegradable. To provide an environmentally friendly solution, we propose grafting degradable starch microspheres (DSM) with poly(acrylic acid) (PAA) and cross-linking with polyethylene glycol (PEG) to form DSM-g-PAA-c-PEG, a binder that demonstrates strong adhesive properties and superior mechanical strength compared to PAA. The UV-Visible spectrum confirms DSM’s continued degradability. After cycling the Si@DSM-g-PAA-c-PEG anode 100 times at 0.25 C, it achieves a capacity retention rate of 58.1 % with a reversible capacity of 2127.8 mAh g −1 . This work provides new insight into the engineering of next-generation silicon electrode using an environmentally-friendly binding strategy, which may advance the large-scale industrial application of lithium-ion batteries.
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Pharmaceuticals
·
2025
·Vol. 18
·期 9
·1319
·
IF 4.8
Xiaoxiao Chen,Jing Tang,Shijie Zhan,Yixian Qiu,Jing Li,Weiguang Shan,Youmin Ying
Background/Objectives:Acute lung injury (ALI) is a respiratory disorder lacking specific targeted therapy. Our preliminary screening revealed that the ethanol extract of the seeds ofPodocarpus nakaii(EESPN) alleviated the symptoms of ALI in mice. The objectives of this study were to identify the active constituents in EESPN and study the mechanism involved.Methods:Column chromatography was performed to separate the chemical constituents of EESPN. The structures of the isolates were determined via spectroscopic methods. MTT assays, Western blotting, histological analysis, TUNEL assays, immunofluorescence staining, transcriptomic analysis, and quantitative real-time polymerase chain reaction (qRT–PCR) were employed to evaluate the anti-inflammatory activity and to elucidate the potential mechanism of nagilactone C (3, Nag C) in ALI treatment.Results:Twelve compounds were isolated from EESPN and structurally characterized. The structure of podolactone E (1) was confirmed via single-crystal X-ray diffraction. In vitro, Nag C showed potent anti-inflammatory activity in LPS-induced RAW 264.7 cells. Nag C liposomes significantly ameliorated LPS-induced histopathological damage to the lungs, reduced neutrophil infiltration and inflammatory cytokine levels, increased myeloperoxidase (MPO) activity, and promoted apoptosis in mice. In addition to suppressing inflammation, Nag C also significantly suppressed the phosphorylation of the NF-κB, STAT3, and STAT1 proteins.Conclusions:Nag C is an active constituent of EESPN. It may protect against LPS-induced ALI via inhibition of the STAT signaling pathway. Thus, Nag C is a promising lead compound in the development of novel STAT-targeted anti-inflammatory agents.
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JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Quanhui Hou,Jinhui Wang,Yang Zhou,Peng Jiang,Yuting Li,Zhao Ding,Qianyang Wang,Yonglian Xiong
Developing sustainable catalysts for magnesium-based hydrogen storage systems is crucial for advancing clean energy technologies. Here, we report a facile synthesis strategy for Co/C nanocomposites using renewable sugarcane bagasse as a carbon precursor, achieving uniform dispersion of Co nanoparticles (<200 nm) within a hierarchically porous carbon matrix. The optimized MgH 2 +10 wt% Co/C composite exhibits dramatically enhanced hydrogen storage performance, with a reduction in dehydrogenation onset temperature from 330.4 °C to 209.4 °C and a 26 % decrease in apparent activation energy. The composite achieves rapid hydrogen uptake (6.2 wt% within 10 min at 150 °C) and excellent cycling stability (6.28 wt% after 10 cycles at 300 °C). Mechanistic studies reveal that the superior performance originates from the synergistic effects between the in-situ formed CoMg 2 /CoMg 2 H 5 phases acting as "hydrogen pumps" and the porous carbon framework providing efficient pathways for mass/heat transfer. This work not only demonstrates an effective approach for developing high-performance hydrogen storage materials from renewable resources but also provides fundamental insights into the rational design of sustainable energy materials.
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CHEMISTRY OF NATURAL COMPOUNDS
·
2025
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IF 0.9
Popov S. A.,Qi Z.,Yang G.,Wang C.,Semenova M. D.,Shpatov A. V.,Shults E. E.
New conjugates of lupane triterpenoids bound through a 1,2,3-triazole linker with gallate derivatives were prepared via Cu-catalyzed cycloaddition reactions of [3 β ,28-diacetoxy-20(29)-lupen-30-yl]azide and 3 β -acetoxylup-20(29)-en-30-azido-28-oic acid with gallate derivatives with propargyl substituents in various positions. Conjugate 4 based on betulin with a modified gallate substituent containing a dioxolane moiety possessed potent antioxidant properties and anti-inflammatory activity (suppression of NO hyperexpression).
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
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IF 4.9
Qian Liu,Chenye Zhang,Meimei Ren,Jinyi Wang,Leixin Feng,Yixuan Wang,Chuang Liu,Ningru Xiao,Haiming Zhang
Development of low Pt-loading electrocatalyst with enhanced activity towards oxygen reduction reaction (ORR) is highly demanded for widespread penetration of clean energy technologies. Heterointerface regulation can effectively optimize the electronic structure and intrinsic activity of the carbon supported Pt-based electrocatalyst to reduce Pt consumption. Here, by judicious choice of a sulfur-doped Fe-N-C (Fe-NS-C) as support, we construct a novel Pt/Fe-N-C heterointerface with sulfur incorporation and develop a hybrid electrocatalyst (denoted as Pt@Fe-NS-C) with ultralow Pt-loading (1.51 wt%). The incorporation of sulfur triggers the charge redistribution at the heterointerface and reduces the electron transfer from Pt to Fe-NS-C, prompting the electron density around Pt sites and boosting the electrocatalytic performance towards ORR (half-wave potential: 0.903 V; mass activity of 1.28 A mg −1 Pt at 0.9 V). In comparison, Pt species dispersed onto Fe-N-C without sulfur doping (Pt@Fe-N-C) are electron-deficient, which is not conductive to activate O 2 and results in inferior ORR activity. Zinc-air battery fabricated with Pt@Fe-NS-C as the cathode catalysts shows a large peak power density and a specific capacity of 806.7 mAh g −1 Zn . This work offers an effective way to tailor the heterointerface of hybrid or supported electrocatalyst with optimized electronic structures towards advanced electrocatalysis .
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