JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Lei Wu,Kun Zhang,Qiuyan Ye,Yingjie Lv,Jiaqiao Li,Xiaoyan Guo,Yongnan Chen,Yiming Chen
Titanium alloys exhibit excellent mechanical properties, good corrosion resistance and biocompatibility, making they widely used in medical field. Nevertheless, their practical application is frequently constrained by bacterial infection and corrosion issues in physiological environments. To overcome these challenges, this study proposes a novel multifunctional strategy involving the incorporation of Ag + -loaded ZSM-5 zeolites into a micro-arc oxidated (MAO) coating on the surface of titanium alloy to fabricate Ag/ZSM-5@MAO-Ti composite coating. The microstructure, mechanical properties, and functional characteristics of the coating were systematically characterized. Analysis confirmed that Ag/ZSM-5 were evenly dispersed within the MAO coating while preserving the crystal structure intact. By leveraging the mechanical interlocking effect, the particles were securely retained within the micropores of the MAO layer after in-situ hydrothermal secondary growth. The composite coating exhibited exceptional adhesion to the titanium alloy substrate, with an average bond strength of 64 N. Owing to the inherent hydrophilicity of zeolites, the composite coating demonstrated significantly enhanced hydrophilicity with a contact angle of 12.9±0.7°. Antimicrobial tests results revealed that the coating achieved an inhibition rate of more than 99.99% against Escherichia coli (E. coli), and the sustained release of Ag⁺ ensures long-term antimicrobial efficacy. Furthermore, the composite coating displayed superior corrosion resistance in phosphate buffer solution (PBS). In summary, the Ag/ZSM-5 modified MAO coating substantially enhances the antimicrobial properties and corrosion resistance of titanium alloy, offering a promising strategy for the development of advanced medical devices.
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高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Yanjuan Yang,Yuhuan Li,Liang Deng,Shangzhi Xie,Chuang Gao,Zixu Yang,Jing Xu
The production of 5-hydroxymethylfurfural (5-HMF) from saccharide conversion has fallen short of industrial expectations due to low reaction efficiency and high costs. Herein, we fabricated a series of LaPO4 catalysts with controlled crystal structures and tuned acidity via a facile hydrothermal method. The hexagonal LaPO4-120 catalyst exhibited a high glucose conversion of 99.9% and a remarkable 5-HMF yield of 90.1% at 150 °C for 60 min. Additionally, the hexagonal LaPO4-120 catalyst showed promising activities in converting various saccharides including fructose, glucose, cellobiose, sucrose, and inulin. A series of characterization studies and DFT calculations revealed that the hexagonal LaPO4-120 catalyst possessed low-coordination La sites and abundant zeolitic water stored in the open and oxygen-lined channels, which provided Lewis acid sites and a dynamically local Brønsted acid environment to respectively facilitate glucose isomerization and the subsequent dehydration. A plausible reaction mechanism involving a synergetic proton transfer via hydrogen bonding is proposed. This study offers insights for the design of low-cost and heterogeneous catalysts with finely tuned Lewis and Brønsted acid sites for 5-HMF production.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Yijun Luo,Wenxin Yang,Jincheng Liu,Wei Cai,Zewei Liao,Xiaoyan Xiang,Bingjie Li,Yanxiong Fang
The concurrent production of renewable hydrogen and valorization of biomass represents a promising strategy to tackle energy sustainability and environmental concerns. However, designing efficient bifunctional photocatalytic systems capable of driving both reactions remains a significant challenge. This study introduces a Z-scheme heterojunction composed of graphitic carbon nitride (g-C 3 N 4 ) and titanium dioxide (TiO 2 ), synthesized through a combined hydrothermal and self-assembly approach, for simultaneous photocatalytic H 2 evolution and selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF). The heterostructure establishes an internal electric field that directs photogenerated electrons to g-C 3 N 4 and holes to TiO 2 , thereby facilitating effective charge-carrier separation while preserving their strong redox potentials . Structural analyses confirm the uniform growth of TiO 2 nanorods with reduced diameter of less than 10 nm on g-C 3 N 4 nanosheets, which enhances light harvesting and exposes abundant reactive sites. Under optimized conditions, the composite exhibited exceptional performance, achieving H 2 and DFF production rates of 481.9 μmol g −1 h −1 , respectively, with 92.8 % DFF selectivity. This represents a 3.8-fold enhancement in activity compared to pristine g-C 3 N 4 . The improved efficiency is attributed to the Z-scheme charge-transfer pathway, which mitigates recombination losses and optimizes the utilization of electrons and holes for respective reduction and oxidation reactions. This work provides a scalable framework for integrating green hydrogen generation with biomass refining, advancing the development of multifunctional photocatalysts for sustainable energy and chemical synthesis.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Mengyuan Qiu,Yongzhi Xiong,Wei Zhao,Dong Ouyang,Zongxuan Wu,Tangtianxiang Liang,Changzhou Chen,Shengchun Hu,Hao Sun
Designing low-cost, high-performance electrocatalysts for the electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) to produce 2,5-furandicarboxylic acid (FDCA) remains a significant challenge. Herein, we report a novel post-pyrolysis phosphidation method for preparing Nb- and Fe-doped CoP-based catalysts. Nb-CoP@NC delivers a current density of 91.79 mA cm⁻² at a potential of only 1.50 V vs. RHE, achieving nearly 100 % HMF conversion, 98.3 % FDCA selectivity, and 95.6 % Faradaic efficiency (FE). Structural and surface analyses via XRD and XPS reveal that Nb doping significantly modulates the electronic structure of CoP, generating Nb 5+δ active species, which show superior catalytic activity for HMFOR compared to Fe 3+δ . This work not only highlights the pivotal role of Nb doping in enhancing catalytic performance but also provides a general and facile strategy for constructing efficient bimetallic CoP-based catalysts for biomass-derived HMF oxidation.
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高影响因子
Catalysts
·
2025
·Vol. 15
·期 3
·277
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IF 4
Yunhan Pu,Huajie Zhang,Yanjun Li,Chuan Yu,Xiaofei Song,Chen Yang,Mingli Fu
The conversion of methane (CH4) to methanol (CH3OH) under mild conditions remains a significant challenge in catalysis. In this study, we introduce a method to adjust the surface valence states of copper species in Cu-ZSM-5 catalysts by annealing under different atmospheres (N2, air, and H2). Among these, the 10% Cu-ZSM-5 catalyst calcined in H2showed outstanding performance, achieving a methanol productivity of 8.08 mmol/(gcat·h) and 91% selectivity at 70 °C and 3 MPa using H2O2as the oxidant. Comprehensive characterization revealed that H2annealing optimized the Cu surface to a lower valence state (predominantly Cu+), enhancing CH4adsorption and promoting H2O2activation to generate ·OH and ·CH3radicals, which drive selective CH3OH formation. In situ DRIFTS and radical trapping experiments further confirmed the critical role of Cu+in facilitating C-H bond cleavage and suppressing overoxidation.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Haiqing Liu,Muhammad Jawad,Jingmao Zhao,Baomin Fan,Mohammad Tabish,Muhammad Mubeen,Mubashar Mahmood,Jingbao Wang
Under-film filiform corrosion (FFC) poses a significant challenge to the durability and reliability of Zn–Al–Mg-coated steel (ZM-steel), necessitating the development of advanced protective strategies. Herein, benzotriazole 5-carboxylic acid (BTC)-modified titanium zirconium (TiZr) conversion coatings (CCs) were developed as a sustainable solution to mitigate FFC, enhance corrosion resistance, and improve the adhesion of epoxy (EP) coatings on ZM-steel. Through electrochemical impedance spectroscopy, potentiodynamic polarization, FFC, and neutral salt spray (NSS) tests, the optimized BTC-TiZr CC, prepared in a Ti–Zr solution containing 0.5 g/L BTC, a treatment temperature of 25 °C, and a short immersion duration of 120 s, exhibited superior corrosion resistance, robust adhesion strength, and exceptional FFC inhibition. Metal–organic complexes (MOCs) of Ti/Zr/Zn with BTC were identified alongside mixed Ti/Zr/Zn/Al/Mg oxides and fluorides within the BTC-TiZr CC. BTC not only exerted strong corrosion inhibition efficacy for ZM-steel but also facilitated the formation of MOCs with metal ions in TiZr conversion solutions (CSs). Density functional theory calculations revealed that BTC preferentially adsorbs onto the MgZn2 phase, effectively suppressing its dissolution within the ZM layer. These findings establish BTC-TiZr CCs as a promising, environmentally friendly solution for advanced corrosion protection of ZM-steel, especially FFC suppression.
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高影响因子
PEST MANAGEMENT SCIENCE
·
2025
·
IF 3.8
Linfeng Kai,Chao Qin,Hongfei He,Qing X. Li,Rimao Hua,Pei Lv
BACKGROUND Phytohormones regulate plant growth, development, and stress responses. Strigolactones are a class of phytohormones that have attracted significant scientific interest because of their multifunctional roles in plant biology and ecological interactions. RESULTS In this study, 34 strigolactone mimics were efficiently synthesized by substituting pre-synthesized 5-chloro-3-methylfuran-2(5 H )-one with phenolics and benzenethiols. Most of the chemicals showed seed germination-promoting activities on corn, sorghum, soybean, and sunflower seeds. At a concentration of 100 mg/L, 3 s and 4 h showed a promotion rate of 56% and 63% on corn bud growth and 50% and 62% on sorghum root growth, respectively. The promotion rates of 3 s and 4 h on corn, sorghum, soybean, and sunflower root growth ranged between 35–48% and 46–71%, respectively. The effect on germination of the target compound exhibited a dose-dependent trend, increasing within the range of 0.01–10 mg/L and decreasing within the range of 10–100 mg/L. Optimal promotion rates for corn root and shoot growth at 3 s and 4 h were achieved at a concentration of 10 mg/L. 3 s and 4 h regulated the content of the abscisic acid, auxin, cytokinin, and gibberellin to promote plant germination. The binding energy of GR24 docking with strigolactone receptor proteins derived from Arabidopsis (AtD14) was −7.30 kcal/mol, while 3 s and 4 h were −7.96 and −8.05 kcal/mol, respectively. CONCLUSIONS The structure–activity relationships of 34 novel strigolactone mimics and docking simulations provided structural optimization strategies for designing new strigolactone mimics as plant growth regulators. © 2025 Society of Chemical Industry.
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高影响因子
FUEL PROCESSING TECHNOLOGY
·
2025
·
IF 7.7
Yingnan Sun,Cuicui Sun,Zhengkai Wu,Weilong Che,Qingkun Shang
The preparation of 5-hydroxymethylfurfural (5-HMF) from glucose is an important reaction in the field of solid acid-catalyzed biomass conversion. The reaction is usually carried out at high temperatures and pressures. In this paper, a nonmetallic solid acid catalyst CNs-PF 6 was synthesized from cheap melamine and hexafluorophosphoric acid (HPF 6 ) by low-temperature calcination and immersion method. The catalyst achieved the conversion of glucose to 5-HMF by photo-induction at a lower temperature (80 °C) and atmospheric pressure. And it also has a very high stability for recycling. The unique mechanism of photo-induced CNs-PF 6 catalyzing the conversion of glucose to 5-HMF has been elucidated by photoelectron characterization, transient absorption spectroscopy and theoretical calculations. Namely, under photoinduction, CNs-PF 6 possesses both Lewis acid and Brønsted acid properties. Since light simultaneously provides energy for the conversion reaction, it enables the reaction to proceed at lower temperatures and pressures. Combining light induction with acid catalysis fully leverages the synergistic effects between photocatalysts and solid acid catalysts. This research provides a new successful model for achieving biomass conversion at lower temperatures and pressures.
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高影响因子
Advanced Sustainable Systems
·
2024
·
IF 6.5
Jiawei Zhou,Ming Liu,Shiyang Bai,Jihong Sun,Jia Wei,Ju Wang
The MOF-5@clinoptilolite (MOF@CP) composites are successfully synthesized using polyvinylpyrrolidone (PVP) for adsorption separation of CO 2 /CH 4 , CO 2 /N 2 , and CH 4 /N 2 . The effects of the PVP amounts on the dispersity of MOF-5 on CP random lamellas of the MOF@CPs are evaluated via various characterizations. Meanwhile, their single-component gas adsorption isotherms, breakthrough experiments, and cycling test are measured. The results elucidate that the used PVP amount has a significant influence on the particle size and the uniformity of MOF-5 dispersed on CP random lamellas. The MOF-5-loaded amount in MOF@CP is estimated to be up to 42.52 wt.%. Especially, the surface fractal evolutions indicated the surfaces of MOF@CP became from rough to smooth with the increase of PVP. The CO 2 /CH 4 , CO 2 /N 2 , and CH 4 /N 2 selectivity factors of MOF@CP are higher than that of CP, displaying a better separation performance. Their cycling test revealed that MOF@CPs could be used repetitively, highlighting efficiency for CO 2 and CH 4 separation. Meanwhile, the MOF-5@CP stability under moisture is preliminarily investigated, showing higher moisture resistance stability than MOF-5. Additionally, the grand canonical Monte Carlo simulations demonstrated the adsorption separation mechanism of the prepared MOF@CPs.
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ChemCatChem
·
2025
·
IF 3.9
Zhi Cao,Haitao Cao,Chao Liu,Zhongxiang Fan,Yixiang Shi,Yin Wang,Tao Shen,Lei Li,Gang Qi
Here, a series of schiff-base porous organic polymer-supported silver-nanoparticle, Ag0 NPs@PPTA-x were prepared with a two-step ion coordination/hydrogen reduction. The resulting composite Ag0 NPs@PPTA-9.08 shows excellent catalytic performance for HMF oxidation to HMFCA, and an impressive HMFCA yield of 99.3% was achieved under optimal condition (NaOH 1.5 eq, 50 mL/min air flow, 20 °C, 6 h). Analysis techniques such as ICP-OES, XRD, TEM, SEM, N2 adsorption-desorption, and XPS were employed to characterize the structure and properties of Ag0 NPs@PPTA-x. The results indicate that the coordination of the nitrogen atom is the key factor for the higher activity and stability of Ag0 NPs@PPTA-9.08. The results of leaching and reusing tests as well as structural characterization (XRD, SEM, and FT-IR) shows that the Ag0 NPs@PPTA-9.08 has good stability and robustness structure. Furthermore, a gram-scale oxidation of HMF indicates this catalytic system can be readily scaled up to an industrial level. Finally, the results of other aldehydes oxidation over Ag0 NPs@PPTA-9.08 indicate the good substrate adaptability of the Ag0 NPs@PPTA-9.08. This work provides a new method for stabilizing nano-silver catalysts and opens up a simple avenue to selective oxidation of aldehydes that easily to scaled up.
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INTERNATIONAL MICROBIOLOGY
·
2022
·Vol. 26
·期 1
·59-68
·
IF 3.097
Yang Hua,Zhao Dengqi,Wang Shuping,Yang Lijun,Huang Jianying,Zhang Zibin,Li Shijun
An increasing number of infections caused by multidrug-resistant (MDR) Staphylococcus aureus （ S. aureus ） and Escherichia coli （ E. coli ） have severely affected human society. Thus, it is essential to develop an alternative type of antibacterial agents that has a different bacterial resistance mechanism from that of traditional antibiotics. After the synthesis and structural characterization of a cationic pillar[5]arene with pyridinium groups (PP5), the antibacterial and antibiofilm activities as well as its microbial resistance were systematically investigated. In-depth evaluation of biological studies revealed that PP5 was an active antibacterial agent, with surprising antibiofilm formation ability against E. coli and S. aureus. From the results of differential scanning calorimetry and transmission electron microscopy, it was concluded that the microbicidal activity of PP5 was due to the physical disruption of the pathogen’s membrane and the subsequent leakage of cytoplasmic components, which could greatly reduce the rapid generation of resistance. It was presented that the easily available PP5 has high activity to inhibit Gram-positive and Gram-negative bacteria and/or their biofilms with low cytotoxicity. This pillar[5]arene derivative can be used as a good candidate for controlling drug-resistant pathogenic bacterial infections and treating MDR bacteria.
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高影响因子
BIOMEDICINE & PHARMACOTHERAPY
·
2020
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IF 4.545
Ye Zhou,Meng Zhang,Zhilei Zhang,Yuming Jia,Chong Zhang,Li Peng
Hydrazinocurcumin (HZC), a curcumin analogue, serves as a tumor suppressor in breast cancer and lung cancer. In this study, we investigate the role and mechanism of HZC in regulating HepG2 cell apoptosis and tumorigenicity, and its synergistic effects with 5-fluorouracil (5-Fu). HepG2 cells were treated with HZC and/or 5-Fu to analyze the possible synergistic effects on cell proliferation, apoptosis and cell cycle distribution in vitro using EdU staining, Hoechst staining and flow cytometry, respectively. For mechanistic investigation we used pic, a phosphatase and tensin homolog (PTEN) inhibitor, and in other studies assessed the expression pattern of PTEN and PI3K/Akt signaling pathway-related genes. Additionally, we tested in vivo effects of HZC and 5-Fu treatment on growth of HepG2 cell tumors in nude mice. We found that HZC or 5-Fu induced apoptosis and repressed proliferation of HepG2 cells by upregulating the expression of PTEN and disrupting the PI3K/Akt signaling pathway activation. Moreover, HZC had a higher pro-apoptotic effect than 5-Fu. HZC and 5-Fu induced HepG2 cell apoptosis and inhibited their tumorigenicity in vivo . Inhibition of PTEN expression activated the PI3K/Akt signaling pathway and reversed the protective effects of HZC or 5-Fu. Thus, HZC and 5-Fu increase PTEN, which blocks the PI3K/Akt signaling pathway, ultimately inducing HepG2 cell apoptosis. Importantly, the synergistic combination of HZC and 5-Fu may present promising strategy for the treatment of HCC.
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高影响因子
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