POLYMER
·
2024
·
IF 4.1
Huiting Yu,Xi Sun,Zheng Liu,Heguo Han,Jianhang Qiu,Qifeng Zhang,Yuxuan Sun,Shenghai Li,Suobo Zhang
Semi-crystalline poly (ether ketone) (PEK) materials with intrinsic solvent resistance are ideal materials for the preparation of organic solvent nanofiltration (OSN) membranes. Although some precursor materials have been developed for soluble processing through group protection strategies, these precursors are difficult to hydrolyze, limiting their practical applications. In this work, we designed an easily hydrolyzable N-cyclohexyl-poly (ether ketone ether imide) (CYH-PEKEI) precursor that could be converted to PEK by acid treatment at 80°C within 1 h. The results showed that the prepared membrane was stable in various organic solvents, with a permeance of 1.29 L m −2 h −1 bar −1 in N, N-Dimethylformamide (DMF), a molecular weight cutoff of 320 g/mol, and good long-term operational stability. Additionally, the membrane demonstrated excellent aging resistance during variable temperature DMF operation. This work has stimulated the potential of PEK membranes for OSN applications by optimizing the precursor structure.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuxiao Hu,Kai Zhang,Jiayin Shang,Qiguan Wang,Jiale Chen,Hong Deng,Yuxin Cui,Sumin Wang
Aqueous zinc-ion hybrid capacitors (ZIHCs) are an ideal candidate for energy storage resulted from their low cost and high safety. Nonetheless, their wide applications have been hindered by the sluggish migration kinetics of Zn 2+ , low activity and low structural stability of cathodes during prolonged cycles. Herein, we report a supermolecular route by using two small molecules (melamine and cyanuric acid) inhaled in the interlayered space of expanded graphite (EG) flakes, where they are self-assembled into N-containing supermolecules. After calcination at high temperature, the supermolecules sandwiched in EG are converted to N-containing carbon spherical nanoparticles (NCSN). The insertion of NCSNs enlarges interlayered distance and the nitrogen and oxygen groups on NCSN enhance Zn 2+ adsorption, which boosts the transfer dynamics of zinc ions. Meanwhile, the in-situ formed NCSNs enhance the specific surface area of EG. Thus the fabricated ZIHCs employing the NCSN inserted EG (NCSN@EG) as the cathode deliver a high specific capacity of 355.6 F g −1 with the energy density of 142.7 Wh kg −1 and power density high as 170.2 W kg −1 in the voltage range of 0–1.7 V. In addition, the in-situ formed NCSNs strengthen the stacked two-dimensional structure of EG as bridges, and after 30,000 cycles, the capacity retention rate is as high as 87.2 %.
✓ 已验证
产品关联
DOI
高影响因子
Cell Death & Disease
·
2025
·Vol. 16
·期 1
·1-11
·
IF 9.6
Chu Xiufeng,Zhang Ting,Bukhari Ihtisham,Hu Mei,Xu Jixuan,Xing Yamin,Liang Xinfeng,Zhang Zisen,Zheng Pengyuan
Gasdermin D (GSDMD) is a critical pyroptosis mediator, consisting of one N-terminal pore-forming domain and one C-terminal auto-inhibitory domain. The free N-terminal domain (GD-NT), which is released through caspase-1/11 cleavage, exhibits distinct features from the full-length GSDMD (GD-FL), including oligomerization, membrane translocation, and pore-formation. However, the underlying mechanisms are not well elucidated. Here, we found that GD-NT, but not GD-FL, was massively ubiquitinated in cells. The K63-linked polyubiquitination of GD-NT at Lys236/237 (human/mouse), catalyzed by TRAF1, directly prompted its membrane translocation and pore-formation during pyroptosis. Inhibition of GD-NT ubiquitination via site-directed mutations or the UBA1 inhibitor PYR-41 suppressed cell death in several pyroptosis cell models. Additionally, applying PYR-41 in septic mice efficiently suppressed the release of IL-18 and TNFα. Thus, GD-NT ubiquitination is a key regulatory mechanism controlling its membrane localization and activation, which may provide a novel target for modulating immune activity in pyroptosis-related diseases.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Jingyan Yu,Rajendran Kalimuthu,Xingchen Liu,Wengao Zhang,Yonggen Tan,Kun Yan,Shenglin Ye,Jun Feng
Carbon quantum dots (CQDs) hold great potential as fluorescence probes due to their tunable optical properties, but remain challenges in tailoring surface functionalization for selective metal ion detection, which is essential for environmental monitoring and water quality analysis. This work, synthesized nitrogen and sulfur co-doped carbon quantum dots (N, S-CQDs) were via a one-pot solvothermal method with two different solvents, N, N-dimethylformamide (DMF) and acetone. The influences of solvent selectivity on the surface functionality of CQDs and their fluorescence quenching mechanisms were evaluated in both experimental and computational methods. To represent CQDs surfaces, density functional theory (DFT) calculations of the total density of states (TDOS) and partial density of states (PDOS) were conducted. Our findings revealed that synthesized CQDs in DMF and acetone exhibited fluorescence quenching as static and dynamic. We have achieved the highest quantum yields of 37.85 % and 28.59 %. This shows excellent sensitivities of Fe 3+ at 0.82 μM and 1.19 μM for Co 2+ . Furthermore, the study extended to validated in real water sample analysis. This approach enabled the development of a novel strategy for the selective and sensitive detection of Fe 3+ and Co 2+ ions.
✓ 已验证
产品关联
DOI
高影响因子
WEAR
·
2024
·
IF 5.3
Zhihui Zhang,Jianxin Deng,Yang Lu,Jiaxing Wu,Ran Wang,Yichen Bao
In this paper, the electrojet mask in-situ forming technology was used to prepare (CF x ) n /CaF 2 -ZrO 2 /TiO 2 composite films with different ZrO 2 /TiO 2 texture distributions, to improve the adhesion properties and tribological performance of (CF x ) n /CaF 2 lubricant films. The microstructure, mechanical properties, and reciprocating wear characteristics between the composite films and 304 stainless steel counterparts were studied. The results showed that the textured hard film significantly improved the adhesion strength of the soft film and the tribological properties of the composite film. The composite film sample B had the lowest friction coefficient (∼0.100) and a lower film wear rate of ∼2.85 × 10 −7 mm 3 N −1 mm −1 , and also showed good self-lubricating properties in the high-temperature wear process. Sample C had a lower friction coefficient of ∼0.107 and the lowest film wear rate of ∼2.75 × 10 −7 mm 3 N −1 mm −1 . Compared with untextured composite film sample DC, sample B showed a 21.3 % reduction in friction coefficient, while sample C showed a 54.8 % decrease in film wear rate. This was because the surface texturing treatment of hard films enhanced the storage and flow of lubricant particles, and maintained a stable self-lubricating film during reciprocating wear. Moreover, (CF x ) n and CaF 2 have a synergistic effect in a wide temperature range of 25 °C–600 °C.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Siyue He,Ningxuan Xue,Guanjie Lin,Yiyang Chen,Xinyu Gai,Yalin Yu,Fengling Liu,Zhaobing Guo,Pengxiang Qiu
Nowadays, organic contaminants have posed a considerable threat to the natural environment. Ferrate (Fe (VI)) is an environmentally friendly oxidant for decomposing organic contaminants in water. In this study, Co modified N-doped carbon nanosheets were prepared to enhance phenol degradation by Fe (VI) under alkaline conditions. Also, the properties, mechanism and transformation pathways were investigated. Co/NC-1000 significantly accelerated Fe(VI) activation, resulting in phenol degradation to be 1.5–4 times faster than with Fe(VI) alone, achieving 92 % removal within 75 seconds. Also, •OH is the essential active oxidizing species for the degradation of phenol in the Fe (VI)-Co/NC-1000 group, followed by 1 O 2 and Fe(V)/Fe(IV). Moreover, the catalyst remained stable over five cycles, making the Fe(VI)-Co/NC system a promising method for efficient water treatment.
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Fan Gao,Ying Nie,Yue Zhang,Tao Wang
Carbon nanomaterial is a momentous field of current biomedical research. However, extensive exploration is still required to endow carbon nanomaterial with both antibacterial properties and biological safety. In this study, fullerenol and calcium ions were synthesized into C 60 (OH) n -Ca nanoparticles through an electrostatic self-assembly strategy. Morphological and chemical analyses revealed that the C 60 (OH) n -Ca nanoparticles contained 4.52 at.% Ca, with a minimum size of approximately 10 nm. The electrostatic self-assembly did not alter the chemical structure of the fullerenol. The photodynamic antibacterial effect of the C 60 (OH) n -Ca nanoparticles was concentration-dependent, showing antibacterial rates of 94 % and 96.6 % against Escherichia coli and Staphylococcus aureus at a concentration of 100 μg/mL, while the antibacterial effect was unsatisfactory under dark conditions. Additionally, C 60 (OH) n -Ca nanoparticles promoted the proliferation of MC3T3-E1 cells, demonstrating desirable biological safety. The C 60 (OH) n -Ca nanoparticles synthesized in this article achieved a balance between antibacterial and cytocompatibility, thus possess potential applications in biomedical fields.
✓ 已验证
产品关联
DOI
高影响因子
Energy Materials
·
2025
·Vol. 5
·期 3
·N
·
IF 11.2
Hongwei Liu,Zhenming Cui,Yan Sun,Zhennan Qiao,Yanlan Zhang,Qiang Bai,Yongzhen Wang
Carbon-based supercapacitors have emerged as promising energy storage components for renewable energy applications due to the unique combination of various physicochemical characteristics in porous carbon materials (PCMs) that can improve specific capacitance (SC) properties. It is essential to develop a methodical approach that exploits the synergy of these effects in PCMs to achieve superior capacitance performance. In this study, machine learning (ML) provided a clear direction for experiments in the screening of key physicochemical features; SHapley Additive exPlanations analysis on ML indicated that specific surface area and specific doping species had a significant synergistic impact on SC enhancement. Utilizing these insights, an O, N co-doped hierarchical porous carbon (ONPC-900) was synthesized using a synergistic pyrolysis strategy through K2CO3-assisted in-situ thermal exfoliation and nanopore generation. This method leverages the role of carbon nitride (graphite-phase carbon nitride) as an in-situ layer-stacked template and the oxygen (O)-rich properties of the pre-treated lignite, enabling controlled synthesis of graphene-like folded and amorphous hybrid structures engineered for the efficient N and O doping sites and high specific surface area, resulting in an electrode material with enhanced structural adaptability, rapid charge transfer, and diffusion mass transfer capacity. Density functional theory (DFT) calculations further confirmed that pyrrole nitrogen (N-5), carboxyl (-COOH) active sites, and the defect structure formed by pores synergically enhanced the adsorption of electrolyte ions (K+) and electron transfer, improving the SC performance. The optimized ONPC-900 electrode exhibited impressive SC properties of 440 F g-1 (0.5 A g-1), outperforming most coal-based PCMs. This study provides a methodology for designing and synthesizing high SC electrode materials by optimizing the key characteristic parameters of synergism from complex structure-activity relationships through the combination of ML screening, experimental synthesis, and density functional theory validation.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 10
·7869-7875
·
IF 4.6
Zheng Chen,Shuting Wang,Hongyan Zhou,Suyuan Zeng
Molybdenum carbide (Mo2C) has emerged as a subject of considerable research interest as an intrinsically Pt-like electronic and cost-effective alternative to platinum-based catalysts for the sustainable hydrogen evolution reaction (HER). However, a high carbonization temperature can easily cause the agglomeration of nanoparticles. Therefore, we employed a zeolitic imidazolate framework (ZIF)-assisted synthesis strategy, obtaining Mo2C/CN-T nanoparticles by calcining the precursor Mo-ZIF at high temperature and low pressure. Utilizing the carbon defects, nitrogen doping, and nanosized active sites provided by ZIFs, the as-prepared electrocatalyst enables swift catalytic reaction kinetics and superior activity stability. The as-prepared Mo2C/CN-850 manifests a high HER catalytic activity in acid and alkaline media with a small overpotential of 97 and 117 mV at 10 mA cm−2, respectively and good stability at the industrial current density above 200 mA cm−2.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE RESEARCH
·
2024
·
IF 2.4
Lin Wang,Yu Pang,Zhongwen Su,Meihua Xin,Mingchun Li,Yangfan Mao
N -(sodium 2-hydroxypropylsulfonate) chitosan (HSCS), N -sulfonate chitosan (SCS) and N -isonicotinic sulfonate chitosan (ISCS) were prepared. The structures of the prepared chitosan derivatives were characterized by nuclear magnetic resonance ( 1 H NMR) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, ultraviolet–visible (UV–vis) spectroscopy and elemental analysis (EA). Antibacterial and antibiofilm activities of these chitosan derivatives were evaluated in vitro . The minimum inhibitory concentration (MIC) of HSCS and SCS against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) were 0.625 mg/mL and 0.156 mg/mL, respectively. ISCS exhibited MIC values of 0.313 mg/mL and 0.078 mg/mL against E. coli and S. aureus , respectively. ISCS demonstrated superior antibacterial and antibiofilm properties compared to SCS and HSCS. These findings suggest that the incorporation of a pyridine structure into sulfonate chitosan enhances its antibacterial and antibiofilm activities, and the prepared ISCS has a promising application prospect for controlling the reproduction of microorganisms in the field of food packaging.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Yao Fang,Yuanjun Tang,Guoneng Li,Jun Dong,Chao Ye,Zhongming Bu,Wenwen Guo
The efficient removal of fluoroquinolone antibiotics from water is critical for water pollution control. In this study, a novel self-nitrogen doped porous biochar (KBC) was synthesized using waste peanut meal as a precursor, combined with high-temperature pyrolysis (900 °C) and an activating agent (C 2 H 2 K 2 O 5 ) at an optimal mass ratio of 1:2. The KBC exhibited excellent adsorption capacity for levofloxacin (LEV) with the maximum capacity of 717.87 mg g −1 (at 0.15 g L −1 ). The adsorbents demonstrated rapid adsorption kinetics, achieving 83.36 % of total adsorption within 2 h, and exhibited pH-dependent adsorption behavior, with optimal performance at pH = 9. Thermodynamic studies indicated that the adsorption process was spontaneous and endothermic. The adsorption isotherm followed the Langmuir model, suggesting monolayer chemisorption as the dominant mechanism. Additionally, the pseudo-second-order kinetic model further confirmed the involvement of chemical interactions. Material characterization and density functional theory (DFT) simulations were employed to reveal the underlying adsorption mechanisms: (1) micropore filling-dominated physical adsorption (BET surface area = 2119.96 m 2 g −1 ); (2) hydrogen bonding and π-π electron donor-acceptor interactions between oxygen-containing functional groups on the KBC surface and LEV molecules; (3) DFT calculations revealed that the adsorption energy of anionic LEV (−321.72 kJ mol −1 ) was significantly higher than that of neutral and cationic forms, consistent with the experimental pH-dependent trend; and (4) DFT-optimized configurations demonstrated strong interactions between LEV and the biochar with a bond distance of 2.0 Å, providing atomic-level evidence for adsorption stability. These findings offer practical insights into the valorization of agricultural waste and advanced strategies for water remediation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Jirui Qu,Yusheng Tong,Yujiao Bi,Wenbo Sun,Yanyue Shi,Zexuan Zhao,Zhihui Liu,Shaofeng Wang,Lei Liu,Xilei Chen,Chuanmei Jiao
In recent years, P-N based hybrids flame retardants have received more and more attention in the field of fire safety due to their synergistic effect in the gas and condensed phases, which makes it easy to achieve efficient flame retardancy. However, their flame retardant mechanism in the gas phase rests more on the increase of non-flammable gases than on the conversion of harmful gases to harmless gases, and their hybrids are often not sufficiently stable. Therefore, in this study, P-N hybrids were encapsulated and modified using MXene, which has high thermal stability and outstanding catalytic ability, to prepare a novel flame-retardant hybrid, MDAPP, which was incorporated into rigid polyurethane foam (RPUF) to achieve more efficient fire safety performance. The results showed that MDAPP significantly enhanced the fire safety properties of RPUF composites. Specifically, RPUF-2.0MDAPP resulted in 40.98%, 63.16, and 60.00% decreases in total heat release (THR), total smoke release (TSP), and CO production rate (COPR) of RPUF, respectively. Moreover, the system also achieves synergistic flame retardant effects in the gas and condensed phases. At the same time, RPUF-2.0MDAPP has excellent thermal shielding performance, with a temperature reduction of 88.14% compared to RPUF in a fire source heating test when placed in a vertical position. In addition, the compressive strength and hydrophobicity of RPUF-2.0MDAPP have been improved to ensure its longevity in complex environments. This study proposes a solution to the problem of reducing the fire risk of RPUFs and promotes the widespread use of RPUF.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）