JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 21
·9250-9264
·
IF 3.5
Liu Lvfei,Zhang Yao,Gu Yunjie,Qu Jiangwen,Wang Naiguang,Ge Shuaichen,Li Jingsha
The sluggish oxygen reduction reaction (ORR) has been one of the most majority bottlenecks of fuel cells and metal-air batteries. It is extremely desirable but challenging to explore low cost, highly active, stable catalysts toward ORR to replace commercial Pt/C catalysts. Herein, a novel hybrid system consisting of trace copper and bi-nonmetallic (N/S) modified the commercial ketjenblack (KB) carbon (Cu–NS–C) has been successfully fabricated by a pyrolysis of Cu–MOF/KB and thiourea to transform crystalline Cu/Cu 2 O nanoparticles into copper sulfide nanoparticles and the subsequent acid leaching. The optimized Cu–NS–C delivers a half-wave potential of 0.81 V versus RHE and a limiting-current density of 5.0 mA cm −2 , which is next to those of commercial 20 wt% Pt/C catalyst. Furthermore, this catalyst demonstrates much better durability and methanol tolerance than Pt/C catalyst.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jie Chen,Wen Zeng,Huiyao Huang,Xiaoyu Lou,Song Chen,Changshen Ye,Zhixian Huang,Ting Qiu
Conjugated micro-mesoporous poly(aniline)s (CMPAs) synthesized through Buchwald-Hartwig coupling represent a cutting-edge material platform for selective sequestration of Hg (II) but suffer from moderate porosities and constrained availability of adsorption sites. Herein, we show a salt strategy for fine-tuning the porosity and Hg (II) adsorption performance of a series of S, N dual heteroatom functionalized CMPAs (CMPA-SN). The salt of NaF with appropriate dosage results in strikingly improved surface areas from 26 to 735 m 2 /g and intensified Hg (II) adsorption capacity from 311 mg/g to 649 mg/g. Moreover, CMPA-SN exhibits an efficient adsorption rate ( h = 1250 mg/g/min) and excellent affinity with high K d as high as 1.24 × 10 6 mL/g. We successfully correlate the adsorption capacity and surface area, and reveal the synergistic electron-sharing mechanism from N-containing ligands and in-situ decorated S heteroatoms, with 67.6 %/32.4 % contributions and Δ E ads = -0.419 eV/Δ E ads = -0.487 eV adsorption energy.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Wenmiao He,Xiu Chen,Shijie Zhou,Zuqiang Fu,Jin Xu,Qian Liu,Francisco Javier Cubero,Zhong Li,Yong Zhou,Dayong Wang,Guibin Jiang,Aihua Gu
Despite the widespread prevalence of BPS in human populations, its potential impacts on offspring and the underlying mechanisms remain poorly understood. In this study, we found that parental exposure to BPS at environmental doses induced lipid accumulation in Caenorhabditis elegans from one-generational parent (P0) to two-generational offspring (F2), even in the absence of BPS exposure in offspring. Mechanistically, BPS-induced transgenerational lipid accumulation was due to the activation of lipogenic genes (fat-5 and fat-7, encoding delta-9 desaturases) and the associated transcriptional regulators (sbp-1 and mdt-15). Knockdown of methyltransferase wdr-5.1 reversed BPS-induced transgenerational inheritance via inhibiting histone H3K4 trimethylation (H3K4me3). Interestingly, germline-specific wdr-5.1/H3K4me3, rather than intestinal, was identified as being responsible for transgenerational inheritance. Our study provides the first evidence elucidating the mechanisms through which environmentally relevant BPS exposure induces lipid accumulation and transmits this effect across generations.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Kunfeng Zhang,Jinxia Liang,Sainan Yang,Fangfei Song,Hongxia Chen,Baozhong Zhang,Bo Peng,Hanyu Chen,Hongxing Dai
Constructing an S-scheme heterojunction presents an effective strategy to enhance photocatalytic efficiency via accelerating photoexcited charge separation while preserving strong redox potentials. Herein, amorphous Ni(OH) 2 (a-NH) was in-situ integrated with crystalline Bi 12 O 17 Br 2 (BOB) nanosheets to form an amorphous/crystalline a-NH/BOB S-scheme heterojunction. The as-synthesized a-NH/BOB-0.5 photocatalyst exhibited superior bisphenol A (BPA) degradation efficiency, achieving 48.7 and 3.7-fold enhancements compared to individual a-NH and BOB, respectively. Comprehensive investigations revealed that the improved photocatalytic activity originated from the synergistic effects of enhanced light-harvesting ability and the formation of strong interfacial electric field at the amorphous/crystalline interface. Moreover, the influences of solution pH, coexisting anions, and water matrices on BPA degradation efficiency were also investigated. Reaction mechanism and toxicity assessment demonstrated that BPA could be gradually transformed into small molecules with low toxicity. This work demonstrates an efficient approach for the design of high-performance photocatalysts for environmental remediation by constructing amorphous/crystalline interface and S-scheme charge transfer mechanism.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Zhiru Yang,Zi Yang,Wentao Hou,Hai Zhou,Hao He,Chao Jin
This study modifies the structure of bimetallic cobalt‑nickel metal-organic framework (CoNi-MOF) via a sulfur doping strategy to form a composite material (CoNi-MOF-S) and investigates the mechanism for enhancing its electrochemical performance as a supercapacitor electrode. Compared with undoped CoNi-MOF, the introduction of sulfur plays a dual role: on one hand, sulfur replaces partial elements in organic ligands to form metal‑sulfur covalent bonds, which enhance electron transport efficiency; on the other hand, it successfully induces the formation of cobalt sulfate and nickel sulfate crystalline phases. These newly generated crystal phases construct a stable framework within the nanostructure, effectively alleviating the volume expansion problem during charge-discharge processes. The synergistic effect between the two endows the material with excellent charge-discharge performance and cycling stability. Experimental results show that CoNi-MOF-S2 exhibits superior specific capacitance (701C/g at 0.5 A g −1 ) and cycling stability (capacity retention >85 % after 5000 cycles at 5 A g −1 ) in 6 M KOH electrolyte. Furthermore, a flexible quasi-solid-state supercapacitor with a sandwich structure is constructed using CoNi-MOF-S2 as the positive electrode, activated carbon (AC) as the negative electrode, and a gel electrolyte. This device achieves an energy density of 53.4 Wh kg −1 at a power density of 379.4 W kg −1 , maintains 76.9 % capacity after 5000 cycles at 5 A g −1 , and can operate normally during bending. Demonstrating the synergistic mechanism of crystalline phase reconstruction and electronic structure optimization, this study offers new insights to enhance the performance of CoNi-MOF for electrode materials.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 4
Yu Shi-Han,Wang Lu,Zhang Meng-Chao,Li Hong-Kun
Exploration of new green polymerization strategies for the construction of conjugated polymers is important but challengeable. In this work, a multicomponent polymerization of acetylarenes, alkynones and ammonium acetate for in situ construction of conjugated poly(triarylpyridine)s was developed. The polymerization reactions of diacetylarenes, aromatic dialkynones and NH 4 OAc were performed in dimethylsulfoxide (DMSO) under heating in the presence of potassium tert-butoxide ( t -BuOK), affording four conjugated poly(2,4,6-triarylpyridine)s (PTAPs) in satisfactory yields. The resulting PTAPs have good solubility in common organic solvents and high thermal stability with 5% weight loss temperatures reaching up to 460 °C. They are also electrochemically active. The PTAPs incorporating tetraphenylethene units manifest aggregation-induced emission features. Moreover, through simply being doped into poly(vinyl alcohol) (PVA) matrix, the polymer and model compound containing triphenylamine moieties exhibit room-temperature phosphorescence properties with ultralong lifetimes up to 696.2 ms and high quantum yields up to 28.7%. This work not only provides a facile green synthetic route for conjugated polymers but also offers new insights into the design of advanced materials with unique photophysical properties.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ying Wang,Shanze Liu,Fangbiao Wang,Xin Fan,Qi Chen,Youjin Zheng
The high-pressure effect can effectively regulate the bandgap width of thermoelectric materials, thus optimizing the material properties. In this study, the high temperature and high pressure (HPHT) technique was employed to synthesize In-filled, Te/S double-substituted skutterudite-based thermoelectric materials. The effects of synthesis pressures ranging from 2.0 to 3.5 GPa on their phase structure, microstructure, and thermoelectric properties were systematically investigated. XRD and EDS analyses confirm the phase-pure synthesis of In 0.05 Co 4 Sb 11.3 Te 0.6 S 0.1 . The experimental results combined with first-principles calculations indicate that the pressure-induced bandgap widens from 0.245 eV at 2.0 GPa to 0.270 eV at 3.0 GPa, resulting in not only an exponential decay of the conductivity but also a significant increase in the absolute value of the Seebeck coefficient. The analysis based on the Callaway model demonstrates that introducing In, Te, and S elements strengthens grain boundaries, increases point defects, and enhances resonance scattering, thereby effectively reducing lattice thermal conductivity. At 773 K, the 3.0 GPa sample exhibits the lowest thermal conductivity of 1.56 Wm −1 K −1 and a maximum zT value of 1.20, representing a 40.18 % increase over that of the sample synthesized at 2.0 GPa and an 11.02 % increase over that of the Co 4 Sb 11.3 Te 0.6 S 0.1 sample. In addition, the sample synthesized at 3.5 GPa demonstrates excellent mechanical performance, exhibiting a Vickers hardness of 11.12 GPa. New strategies have been provided for the development of materials with both high thermoelectric and mechanical properties.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Guanhong Liu,Rongze Tang,Congcong Wang,Dehong Yu,Zhenxin Wang,Haochen Yang,Jia Wei,Shunhua Zhu,Fenglei Gao,Feng Yuan,Bin Pan
Cuproptosis and ferroptosis are difficult to synergize in tumor suppression due to their spatiotemporal asynchrony and mechanistic dispersion. Therefore, we proposed a new paradigm of Ferroptosis-Cuproptosis self-recycling. An iron‑sulfur cluster (Fe-S) metabolic collapse was constructed by hyaluronic acid (HA)-functionalized bimetallic nano-enzymes (HA@CuCo-NC) to initiate this tumoricidal mechanism. HA@CuCo-NC specifically accumulates in osteosarcoma cells through HA-mediated targeting. The multi-enzyme activity triggers a surge of reactive oxygen species (ROS) in the tumor microenvironment, which, along with Co 2+ , induces ferroptosis. This leads to severe mitochondrial damage and glutathione (GSH) depletion, which in turn activates the cuproptosis cascade. Cuproptosis causes Fe-S protein degradation and Fe 2+ release into the labile iron pool (LIP) by inhibiting Fe-S cluster formation and dihydrolipoamide acetyltransferase (DLAT) oligomerization. The released Fe 2+ enhances oxidative stress and promotes membrane disassembly via the Fenton reaction. The two act synergistically to form a dynamic self-reinforcing cycle: Ferroptosis-related mitochondrial damage exacerbates the toxicity of Cu 2+ . Cuproptosis-released Fe 2+ further activates ferroptosis. In vivo experiments demonstrated that HA@CuCo-NC significantly inhibited the growth of osteosarcoma in situ without causing systemic toxicity. This research introduces a novel approach to treating solid tumors by reconstructing the metabolic interaction network of copper and iron.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Jiangyu Wu,Jianghua Wu,Yuwen Xue,Yunwu Zheng,Jingyan Liu,Xu Lin,Fulin Yang,Yuan Zou,Can Liu
This study develops an environmentally friendly method to create S/P dual-doped porous carbon (WSC-SP-800) from walnut shells for supercapacitor electrodes. Compared with the raw carbon materials, WSC-SP-800 exhibits higher specific surface area, richer microporous and mesoporous structures, as well as superior electrochemical performance. The specific surface area rises from 1533.40 m 2 g −1 to 3061.96 m 2 g −1 , and the capacitance increases from 156 F g −1 to 417 F g −1 at a current density of 0.5 A g −1 . Additionally, WSC-SP-800 maintains a capacitance of 270 F g −1 even at a high current density of 10 A g −1 . When assembled into a symmetric supercapacitor, it achieves an energy density of 13.15 Wh kg −1 at a power density of 250 W kg −1 and retains 100 % of its capacity after 5000 cycles. This work not only achieves cost-effective, high-performance energy storage with environmentally benign characteristics but also establishes a novel paradigm for the valorization of biowaste through heteroatom engineering, providing a sustainable pathway for supercapacitor development.
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高影响因子
LUMINESCENCE
·
2025
·Vol. 40
·期 8
·e70271
·
IF 3
Zixuan Pu,Manjun Guan,Guilong Wang,Kuan Li,Mingtian Li
Nitrogen and sulfur co-doped yellow-green fluorescent carbon dots (N,SCDs) were synthesized using thiourea and 5-sulfo salicylic acid as raw materials through a one-step microwave solid-phase method. A series of characterizations, including transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared (FT-IR), UV–Vis spectrum, and fluorescent spectrum, were conducted, revealing that N,SCDs are carbon dots with an average size of approximately 5.65 nm. These dots were found to possess a surface rich in hydroxyl, amino, carbonyl, and sulfhydryl groups, along with excellent solid-state luminescent properties. N,SCDs were combined with starch to form N,SCDs-starch composite, which was successfully utilized for high-quality fingerprint development. Additionally, the solid-state N,SCDs were dissolved in DMSO to produce the liquid form, L-N,SCDs, which was effectively applied for the analysis and detection of Fe 3+ and OH − . The limits of detection (LODs) for Fe 3+ were determined to be 0.73 and 2.65 μM in the concentration ranges of 0–100 and 100–237.5 μM, respectively. Similarly, the LODs for OH − were found to be 0.027 and 0.66 μM in the ranges of 0–225and 225–525 μM, respectively. Furthermore, L-N,SCDs configured as fluorescent inks were demonstrated to exhibit significant potential in applications related to information anticounterfeiting.
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高影响因子
POLYMER INTERNATIONAL
·
2025
·
IF 3.6
Jinglei Xing,Lei Yang,Tianci Ma,Guofei Chen
With the rapid development of flexible optoelectronic devices, colorless polyimide films with excellent comprehensive performance have received widespread attention. In this work, a series of poly(amide-imide)s (PAIs) were synthesized by copolymerization of 4,4′-(hexafluoroisopropylidene)diphthalic anhydride, 1,4-cyclohexanedicarbonyl chloride (CHDC) and 2,2′-bis(trifluoromethyl)benzidine. The thermal dimensional stability and mechanical properties of the PAI films were improved due to the introduction of rigid rod-like amide bonds in the polymer chain. In addition, the PAIs with more trans -CHDC content showed higher glass transition temperature ( T g ) and lower coefficient of thermal expansion (CTE). At the same time, the cooperative conformational transitions of cyclohexane rings in trans -CHDC promoted molecular chain slip and improved the film toughness. Moreover, with the introduction of the cyclohexane moiety, these PAIs had excellent optical transparency and solubility. In particular, PAI-6 exhibited high T g of 364 °C, low CTE of 29.8 ppm K −1 , high transmittance of 87% at 400 nm, tensile modulus of 3.6 GPa and elongation at break of 9.7%. Therefore, the incorporation of cyclohexane structures and amide bonds into the main chain through copolymerization with CHDC provided a simple method for the synthesis of tough colorless PAIs with excellent comprehensive properties. © 2025 Society of Chemical Industry.
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高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·Vol. 64
·期 3
·1299-1311
·
IF 3.2
Gang Ma,Xingzhong Fang,Guofei Chen
Aromatic nucleophilic substitution polymerization was used to synthesize five poly(ether nitrile imide)s (PENIs) that include benzonitrile and bulky cardo groups from a mixture of phenolphthalein (PP), 4,4′-bis(4-fluorophthalimide) diphenyl ether (4,4′-BFPI), and 2,6-difluorobenzonitrile (DFBN). The structure and properties relationship of PENIs with different ratios of DFBN and 4,4′-BFPI was explored. It was found that the glass transition temperature ( T g ) of PENIs decreased from 280 to 260°C, while the temperature of 5% thermal weight loss ( T 5% ) in N 2 increased from 429 to 453°C as the benzonitrile content in PENI increased. The produced PENI films had good mechanical characteristics, including tensile strengths of 103–112 MPa, elongations at break of 5.6%–8.2%, and tensile moduli of 2.9–3.4 GPa. Furthermore, the solubility and melt processability were also improved with the introduction of the benzonitrile group. Compared with poly(ether ketone imide)s (PEKIs) and poly(ether sulfone imide)s (PESIs), PENIs with benzonitrile displayed higher T g , tensile modules, and lower complex viscosity.
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