Journal of Water Process Engineering
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2026
·
IF 6.6
Zengjin Fu,Yan Hao,Tingrui Lin,Huiling Ma,Huazheng Sai,Hui Yang
A novel adsorbent (PHPM) was synthesized through the functionalization of N -(2-Hydroxyethyl) acrylamide (HEAA) with phytic acid (PA) and applied for the adsorption of La(III) and Ce(III) ions. The material was characterized by means of FTIR, TGA, SEM, and XPS. The present study systematically investigated the effects of contact time, adsorbent dosage, initial La(III) or Ce(III) concentration, and pH value on the adsorption capacity. The maximum theoretical adsorption capacities of PHPM for La(III) and Ce(III) were determined to be 198.0 and 186.2 mg·g −1 , respectively. The adsorption process followed the pseudo-second-order kinetic model and the Langmuir isotherm model, as further confirmed by nonlinear fitting with low RMSE and χ 2 values. Thermodynamic analysis revealed negative Δ G values, positive Δ H and Δ S values, indicating a spontaneous, endothermic, and entropy-driven process. Furthermore, PHPM demonstrated high adsorption efficiency toward La(III) and Ce(III), even in the presence of competing ions. A preliminary cost analysis indicated that the preparation of PHPM was economically feasible with low cost. The adsorbent maintained approximately 50% of its initial adsorption capacity after ten consecutive adsorption-desorption cycles. The findings demonstrate that PHPM was a promising adsorbent for the recovery of La(III) and Ce(III) from aqueous environments.
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Chem Catalysis
·
2026
·
IF 10.7
Haiwei Su,William Orbell,Lijuan Sun,Hongwen Zhang,Haibo Yin,Zhen Chen,Qinqin Liu,Peng Zhou,Hua Tang,Junhua Li
Photocatalytic amine oxidation coupled with hydrogen evolution offers a sustainable route to green hydrogen and value-added chemicals, yet efficient N–H bond activation remains challenging. Herein, we construct atomic Ag–N frustrated Lewis pairs (FLPs) composed of low-valence Ag single atoms as Lewis acids and adjacent electron-rich N atoms as Lewis bases by anchoring high-density Ag single atoms onto N-deficient g-C 3 N 4 nanosheets to form an Ag–N 1 C 2 structure. These atomic Ag–N FLP sites enable efficient adsorption and selective N–H bond cleavage through synergistic coordination of Ag with the amine N atom and neighboring N sites with H. Meanwhile, Ag single atoms serve as effective hole-transfer bridges, enhancing surface hole accumulation and accelerating oxidation kinetics. The resulting photocatalyst exhibits a benzylamine oxidation rate of 0.85 mmol g cat −1 h −1 , converts benzylamine to N -benzylidenebenzylamine with >99% selectivity, and achieves a hydrogen evolution rate of 1.86 mmol g cat −1 h −1 .
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Hongquan Fu,Chuan Zhang,Yujing Zhang,Zhiyan He
Tetracycline antibiotics are widely used, hard to degrade, and pose significant threats to ecosystems. While biochar adsorption presents both efficiency and cost benefits for tetracycline removal, the specific adsorption sites and underlying mechanism remain inadequately understood. This study investigates the synthesis of nitrogen/oxygen co-doped porous biochar (NSEC) by employing fifth-instar silkworm excrement (fed with formulated feed), melamine, and sodium bicarbonate as activator, through a high-temperature carbonization process. The experimental results revealed that NSEC exhibited a significantly increased specific surface area, higher nitrogen doping levels, and more surface defects, thereby boosting its tetracycline adsorption capacity. Notably, The NSEC900 sample managed to eliminate 87.6% of tetracycline from a 30 mg·L⁻¹ solution in just 2 min and retained about 98.5% after undergoing five adsorption/desorption cycles, showing outstanding stability. The thermodynamic analysis of adsorption aligns with the Freundlich model with multimolecular layer adsorption, the kinetics analysis conforms to the second-order model with an exothermic process. Pyridine nitrogen, pyrrole nitrogen, C O, and O C-OH groups as the primary adsorption sites are from the biochar surface. Furthermore, the adsorption mechanism is characterized by multimolecular layer chemisorption, mainly maintained by van der Waals interactions, hydrogen bonding, and pore filling, which collectively contribute to its high adsorption performance in actual aqueous environments. This study provides novel insights into the development of high-efficiency adsorbent materials and holds significant implications for the control of tetracycline pollution.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·
IF 6.7
Chi Lei,Qixiu Weng,Ping Song,Yingchun Zhu,Liangzhi Li,Lingzhao Kong,Lishi Yan
β-Glucosidase (BGL) is limited by the catalytic efficiency and environmental tolerance in the biomass biorefinery process. In this study, maleimide and its derivatives were used to modify BGL. FT-IR, circular dichroism, ζ-potential, ultraviolet, and fluorescence were used to characterize the conformational alteration of the thiol-modified enzyme and induced the enhancement of rigidity and substrate affinity. Molecular docking revealed that the modified BGL, especially Moc-Mal-BGL, had lower binding energy (−6.8 kcal mol–1) and shorter average hydrogen bond length (2.018 Å) with the substrate. The activity of Moc-Mal-BGL increased by 110.6% compared with native BGL and realized a 2.6-fold increase in catalytic efficiency kcat/Km (13.92 s–1/mM). The corresponding cellobiose conversion rate increased by 19.0%. Thermal stability, storage stability, solvent (GVL and DMSO) tolerance, and glucose tolerance of Moc-Mal-BGL were significantly improved. This work provides a rapid strategy to improve the catalytic efficiency and environmental tolerance of BGL and investigates the mechanism in depth.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Hui Cheng,Tong Yu,Yanhong Wang,Yang Zhao,Qinfu Zhao,Huifen Feng
The limited penetration and efficacy of chemotherapeutic agents, constrained by the distinctive pathophysiological conditions of the tumor microenvironment (TME), remain a major therapeutic obstacle. In recent years, there has been growing interest in modulating the TME to overcome these barriers, which provides a promising way for enhancing cancer treatment. To address this challenge, a multifunctional nanoparticle system (DOX/FeNHC-PEG) was developed for oxidative stress-augmented triple-modal therapy. The system was constructed by doping Fe 3+ ions and N atoms into hollow carbon nanostructures, followed by surface functionalization with NH₂-PEG and subsequent loading of doxorubicin (DOX) into its mesoporous cavities. FeNHC-PEG nanozyme exhibited remarkable multi-enzyme mimetic activities, consuming endogenous glutathione while generating substantial OH through the peroxidase (POD)-like and oxidase (OXD)-like activities, thereby intensifying tumor oxidative stress. Furthermore, the nanozyme demonstrated excellent photothermal conversion efficiency under NIR irradiation. Crucially, real-time shear wave elastography (SWE) revealed that the combined effects of photothermal therapy (PTT) and reactive oxygen species (ROS) significantly reduced tumor viscoelasticity by degrading extracellular matrix components. The change not only enhanced intertumoral drug penetration but also cooperated with persistent oxidative stress to remodel the tumor microenvironment, ultimately leading to a significant increase in chemosensitivity to DOX. Meanwhile, the localized hyperthermia further potentiated the enzyme-like activities, enabling amplified ROS generation. In vivo studies indicated that DOX/FeNHC-PEG exhibited outstanding biocompatibility and potent tumor growth suppression (95.8% ± 1.8% inhibition) with negligible systemic toxicity. The triple-synergistic therapy system represented an innovative approach for tumor microenvironment remodeling, showing considerable translational potential.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Guo Xiurong,Zheng Kaiwen,Liu Zexin,Qiao Lulu,Sun Chaowei,Du Danfeng
The rapid advancement of new energy vehicles presents numerous challenges, among which the growing incidence of battery overheating-related accidents highlights the urgent need for effective thermal insulation materials for battery thermal management. To address this demand, microencapsulated phase-change materials (MEPCMs) comprising a titanium dioxide (TiO 2 ) shell and an n-hexadecane core were synthesized through interfacial polymerization. Incorporation of the MEPCMs into SiO 2 aerogels (SA) prepared by ambient drying yielded a novel phase-change aerogel composite material (MSA). The composite demonstrated a slightly higher thermal conductivity, 0.041 W/m·K, than both pristine silica aerogels and those directly loaded with n-hexadecane. Its latent heat reached 91.39 J/g, thereby combining thermal insulation with energy storage to achieve dynamic thermal regulation. Overall, this simple and scalable fabrication approach underscores the aerogel composite’s promise in battery thermal management and other thermal regulation uses. Graphical
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CELLULOSE
·
2026
·
IF 4.6
Han Qiuxia,Xu Yanmeng,Wang Fei,Zhang Qiang,Chen Yong,Lv Shaoping
In a synergistic unit of N -halamine and cationic salt, an increased ratio of the N -halamine elicited a higher biocidal efficacy. However, the upper limit to the N -halamine content where the synergism is not impaired because of the diminished role of the cationic salt is still unknown. Herein, 4 N -halamine sites, one more than the current maximum, were combined with 1 cationic salt in a composite unit for the evaluation of the effect of such a ratio on synergism. Briefly, 4-aminopyridine was quaternized with 1-chlorohexane to form a cationic pyridinium. Uramil and the cationic pyridinium were successively bonded to allylsuccinic anhydride via ammonolysis and amidation to form a product with 1 cationic salt and 4 N–H bonds as N -halamine precursors. The allylic C=C of the product subsequently reacted with Si–H of poly(methylhydrosiloxane) via hydrosilylation to prepare a polysiloxane that was interpenetrated into cotton cellulose at 50 °C and 28 MPa in supercritical CO 2 . Chlorination of N–H bonds transformed each polysiloxane pendant to the target composite unit that existed in a 71 nm modification layer on the interpenetrated cotton. Antibacterial tests showed that the designed composite units completely eradicated ~ 10 7 CFU of Staphylococcus aureus and Escherichia coli in 15 min, an efficacy between those of a counterpart with only 4 corresponding N -halamine sites and a reported unit with 1 N -halamine and 1 cationic center under comparable conditions, which suggested that the increase of N -halamine to such a ratio did not further benefit synergism. Evaluations of biocidal stability and rechargeability indicated that the modifier was chemically robust and scCO 2 interpenetration produced a durable connection between the modifier and cellulose. Graphical
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Weiya Tian,Lixia Guo,Jiaju Lu,Xiaoling Wang,Jiabin Ding,Junxian Hu
Corncob-shaped Bi/V 2 O 3 @NC composite was designed and constructed. • Bi/V 2 O 3 @NC composite delivers 266.9 mAh g −1 at 1 A g −1 , and high rate performance. • Bi/V 2 O 3 heterostructure and carbon shell ease volume expansion for stable cycling. • Phase transition mechanism of Bi/V 2 O 3 @NC composite during cycling was investigated. Bismuth (Bi) is considered a promising anode candidate for alkali metal-ion batteries owing to its abundant natural reserves, outstanding theoretical capacity, intrinsic conductivity, and moderate charge/discharge potential. However, during cycling, it suffers from pulverization and agglomeration, leading to severe volume expansion, structural collapse, and rapid capacity decay. In addition, its sluggish alloying reaction kinetics limits the rate capability and practical applications. To address these challenges, a corncob-shaped Bi/V 2 O 3 @NC composite is designed, in which Bi and V 2 O 3 nanoparticles are uniformly encapsulated within a nitrogen-doped carbon nanoshell. This hierarchical architecture shortens ion/electron transport pathways and provides abundant electrochemically active sites. The Bi/V 2 O 3 heterointerface mitigates the volume expansion of Bi during cycling while enhancing reversible capacity, as evidenced by the stable cycling performance. The nitrogen-doped carbon coating suppresses volume deformation, enhances electrode conductivity, and facilitates ion diffusion, contributing to improved structural stability and electrochemical kinetics. Benefiting from these structural features, the Bi/V 2 O 3 @NC delivers a reversible capacity of 206.5 mAh g −1 at 10 A g −1 and retains 233.4 mAh g −1 after 3500 cycles at 5 A g −1 . Electrochemical analysis and ex situ characterization reveal that this performance originates from the synergistic effect of surface-capacitive and diffusion-controlled processes, with a high capacitive contribution (93.8% at 1.2 mV s −1 ) enabling fast kinetics. The sodium storage mechanism involves reversible alloying (Bi ↔ NaBi ↔ Na 3 Bi) and intercalation (V 2 O 3 ↔ Na x V 2 O 3 ) reactions, as confirmed by ex situ XRD. This work provides a design strategy for metal/metal oxide heterostructures and offers insights into the electrochemical mechanisms of alloy-based anodes for sodium-ion batteries. Download: Download high-res image (301KB) Download: Download full-size image
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MOLECULES
·
2026
·Vol. 31
·期 11
·1908
·
IF 5.1
Wei Cao,Lifang Chen,Tingting Wang,Ke Wang,Zhen Song,Zhiwen Qi
In order to address corrosion and pollution problems of liquid acids and limitations of traditional solid acids, sulfated MOF-808-SO4catalysts were developed by creating unsaturated sites in MOF-808 for sulfate grafting with ligand defect engineering. Characterization verified framework integrity, successful sulfate coordination, and maintenance of high surface areas and tunable porosity. Temperature-programmed desorption of ammonia (NH3-TPD) establishes a clear consistent trend between defect density and the concentration as well as the strength of acid sites, indicating that a higher degree of ligand deficiency promotes the formation of more abundant and stronger acid centers. For esterification of acetic acid with n-butanol, the catalyst prepared by replacing 40 mol% of BTC with BDC achieved ≥99% conversion of acetic acid under mild conditions of 2.0 wt% catalyst loading and 1:2 alcohol/acid molar ratio at 120 °C for 6 h, outperforming conventional solid acids. This performance stems from high-density strong Brønsted acid sites strongly coordinated at defects and an open pore structure facilitating diffusion. The catalyst was easily recovered by ethanol washing and maintained stable activity over five cycles without loss of catalytic capability. This work suggests defect engineering as an effective strategy for tuning acidity and catalytic performance in MOF-based solid acids for green esterification.
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Materials
·
2026
·Vol. 19
·期 11
·2286
·
IF 3.7
Yi Zhou,Yi Zhang,Zhanhong Zhao,Yansen Qu,Jiajun Wu,Xueqin Ma,Xinghua Chang
Silicon-based anodes are considered promising alternatives to graphite anodes owing to their high theoretical lithium-storage capacity and abundant reserves. However, silicon nanoparticle anodes are severely limited by large volume expansion, unstable interfacial chemistry, and poor electrical connectivity during repeated lithiation/delithiation. Herein, we develop a yolk–shell N-doped carbon network (NCN) strategy to construct Si@void@NCN composites. The optimized Si@void@NCN-1 achieves a balanced architecture between void buffering and carbon network integrity, delivering a high initial discharge capacity of 1245.5 mAh g−1and an initial charge capacity of 735.8 mAh g−1. It also demonstrates stable long-term cycling performance, retaining a reversible capacity of 402.5 mAh g−1after 500 cycles at 0.5 A g−1with a capacity retention of 68.66%, and shows improved rate reversibility and electrode structural stability, with an electrode thickness increase of only 80.4% after rate cycling, much lower than that of densely carbon-coated Si@C. Kinetic analysis, post-cycling structural characterization, and in situ EIS further reveal that the yolk–shell void-buffering structure and the N-doped three-dimensional conductive network act synergistically to mitigate Si volume expansion, enhance structural stability, and facilitate electron/ion transport. This study emphasizes the importance of integrating buffering structures with Si/C composites, providing guidance for the rational design of advanced silicon-based electrode materials.
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Materials Today Chemistry
·
2026
·
IF 7.4
Yangyang Ren,Zehao Zang,Hua Ning,Guichao Zhang,Lanlan Li,Xiaojing Yang,Zunming Lu,Xinghua Zhang,Xiaofei Yu
Highly graphitic carbon-supported Pt particles (Pt/Co–N–C) was developed. • Regulating the electronic structure of Pt through the strong metal-support interaction. • Intrinsic activity was increased by optimizing O 2 adsorption and lowering energy barrier. • High mass activity and excellent stability of Pt/Co–N–C were achieved. Developing durable supported Pt-based materials is essential for advancing the oxygen reduction reaction in fuel cells, as harsh electrocatalytic conditions often trigger corrosion of carbon supports. The support materials’ physical and chemical properties play a crucial role in the overall performance of Pt-based catalysts. Herein, a highly stable electrocatalyst (Pt/Co–N–C) consisting of small Pt particles coupled tightly with highly graphitized Co–N–C substrate for efficient catalysis was proposed. Pt/Co–N–C exhibited a remarkable mass activity in acidic media, 6.4 times higher than that of commercial Pt/C. Notably, Pt/Co–N–C displayed exceptional stability, with only a 3 mV decrease in half-wave potential and retaining 95.8% mass activity even after 50,000 potential cycles during the accelerated durability tests. Experimental and theoretical analysis highlighted the enhanced support-catalyst and electronic effects between Pt and Co–N–C matrix, thereby enhancing the mass transfer and preventing the structural degradation of the electrocatalyst. This work underscored the possibility of simultaneously modifying Pt active sites and carbon support as effective electrode catalysts in fuel cells. Download: Download high-res image (307KB) Download: Download full-size image
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Jing Zhang,Yixuan Gao,Hongna Li,Sihui Zhan
B–N doping disrupts π-conjugation and localizes electrons in biochar. • B–N sites and carbon vacancies promote axial electron transfer and PMS adsorption. • BN-Cv-Biochar enables highly selective 1 O 2 generation and rapid SMX degradation. • BN-Cv-Biochar/PMS system markedly reduces the phytotoxicity of treated water. Selective activation of peroxymonosulfate (PMS) to produce singlet oxygen ( 1 O 2 ) is desirable for efficient water purification. Graphitized biochar is a promising catalyst, but its extended π-conjugated structure favors in-plane charge delocalization and hinders axial electron transfer, leading to low 1 O 2 selectivity. Herein, we fabricated a boron-nitrogen (B–N) conjugated doped carbon-vacancy biochar (BN-Cv-Biochar) to modulate the local π-electronic system. B–N doping breaks the extended π-conjugation, creating polarized active sites and localized electrons that strengthen axial electron transfer and selective PMS adsorption. The degradation rate constant of sulfamethoxazole (SMX) of BN-Cv-Biochar is 1.68 and 4.45 times higher than that of pristine (Biochar) and nitrogen-doped carbon-vacancy biochar (N-Cv-Biochar), respectively. Experimental and theoretical results reveal that B–N sites coupled with carbon vacancies optimize the electronic environment, reduce the energy barrier for 1 O 2 generation, and preferentially promote 1 O 2 -dominated PMS activation. Product analysis clarifies the SMX degradation pathway, and toxicity assays using radish seedlings confirm the reduced toxicity of treated water. This work provides a novel strategy to tune the π-conjugated structure of biochar for high-performance carbon catalysts in advanced oxidation processes. Download: Download high-res image (201KB) Download: Download full-size image
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