INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Yongdie Zhao,Xiaohao Liu,Rui Diao,Dongxu Yan,Fenglei Qi,Peiyong Ma
Selective hydrogenation of fatty acids is an important method for the preparation of long-chain alkanes and fatty alcohols. Herein, a series of bimetallic catalysts with different Fe/Co ratios were prepared by using phosphoric acid-activated biochar as a support. The anchoring effect of P-containing functional groups in the support greatly improves the sintering resistance of the metals. The conversion pathway of stearic acid (SA) can be regulated by controlling Fe doping and the reduction temperature. The reduction of Fe1Co3/PAC at 400 °C can selectively regulate the hydrodeoxygenation pathway of SA. At 250 °C and 4 MPa, SA was almost completely converted to long-chain alkanes. Mechanism study shows that Fe doping increases the hydrogenation site CoO and dehydration site Fe–O–P in catalysts. However, by further increasing the reduction temperature, the metal phosphides formed in the catalyst can significantly enhance the dehydrogenation of octadecanol and decarbonylation of octadecaldehyde.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yi Fan,Jirui Song,Yongyou Su,Yun Luo,Le Tian,Qingfeng Liu,Zitong Fei,Chenchen Li,Qi Meng,Peng Dong,Yingjie Zhang
The widespread utilization of LiFePO 4 (LFP) batteries has rendered the green regeneration of spent LFP cathode materials (SLFP) an urgent priority. Selective lithium extraction strategies have rapidly advanced through enabling simplified yet efficient lithium recycling. However, under acidic conditions, minor Fe dissolution was observed to significantly reduce the structural stability of regenerated LFP materials while exacerbating Li/Fe antisite defects. A novel strategy based on Fe vacancy site-mediated bond energy reinforcement and nucleation regulation was proposed to achieve structural reinforcement and high-efficiency regeneration. Experimental characterization revealed that Li/Fe antisite defects in regenerated materials were reduced from 1.48 % to 0.93 %, with grain size being significantly refined. The regenerated material exhibited a reversible capacity of 150.2 mAh·g −1 at 1C rate, maintaining 94.74 % capacity retention after 500 cycles, while its discharge capacity at 5C rate was elevated by 60 mAh·g −1 . Environmental and economic assessments conducted via the everbatt model demonstrated significant advantages of this strategy.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Meichun Fu,Zhiyu Shao,Yuan Zhang,Qian Zhu,Kuo He,Mengzhu Zhang,Yuzhu Hou,Laiping Fang,Fei Yan,Shuang Zhang,Jianshi Du,Ping’an Ma,Keke Huang,Shouhua Feng
Despite the multiple advantages of high tissue penetration depth, selectivity, and noninvasiveness of photothermal-assisted antitumor synergistic therapy, developing photothermal agents with multifunctional characteristics, desirable tumor therapeutic effects, and biological stability remains a key challenge. Herein, an electronic structure-regulated strategy is proposed to activate self-adaptive Sn–Fe electron pair centers (Sn2+/Sn4+ and Fe2+/Fe3+) through loading the electron donor Pt (Pt/SFO-1, -2, -3, -4). Experimental and theoretical calculations indicate that abundant dynamic active centers can facilitate the production of reactive oxygen species (ROS), which enables Pt/SFO samples to possess catalase (CAT), peroxidase (POD), and oxidase (OXD) enzyme-like activities. Upon near-infrared (NIR) laser irradiation, Pt/SFO-2 with a Pt load of 0.9% achieves the highest ROS production, showing a 9-fold compared with SnFe2O4 and implements the synergistic therapy of photothermal therapy (PTT), photodynamic therapy (PDT), and chemodynamic therapy (CDT). The electronic state regulation of inorganic photothermal agents not only improves tumor therapeutic effects but also offers a novel strategy to regulate the electron structure of active centers.
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Journal of Materials Chemistry C
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2025
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IF 5.1
Kai Xu,Pei Liu,Yinxu Ni,Qingqing Gao,Jin Chen,Shuai Yin,Zixuan Ding,Guohui Tang,Changtian Zhu,Fenghua Liu
Electromagnetic (EM) pollution has emerged as a pressing concern, driving the demand for high-performance microwave absorbing materials. In this work, attapulgite (ATP) was employed as a natural, porous scaffold for the in situ integration of amorphous TiO2, Fe3O4, and polyaniline (PANI), constructing a multifunctional composite with tailored dielectric and magnetic properties. The TiO2 and PANI coatings not only induced strong interfacial and conduction polarization but also formed a continuous 3D conductive network, enabling efficient energy dissipation. Benefiting from the magneto-electric synergy among PANI, TiO2, and Fe3O4, the composite exhibited multiple loss mechanisms and excellent impedance matching. As a result, a minimum reflection loss of -56.24 dB was achieved at 11.63 GHz (2.9 mm thickness), with an ultra-wide effective absorption bandwidth of 8.1 GHz. More importantly, by integrating 3D printing with metamaterial-inspired design, the absorption range was successfully extended into the low-frequency region (4–6 GHz), while simultaneously enhancing structural integrity and corrosion resistance. This study offers a scalable strategy for designing lightweight, corrosion-resistant microwave absorbers by combining hierarchical conductive frameworks with multifunctional components, opening new avenues for next-generation EM shielding and stealth technologies.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Wenjie Wang,Shan Ni,Yue Zhao,Yafeng Liu,Wang Yao,Jianrong Zeng,Congmei Chen,Huizhou Liu,Liangrong Yang
Uranium capture from aqueous solution is a hopeful project for the development of the nuclear industry, while the construction of adsorbents with high adsorption capacity, kinetics and selectivity remains a challenge. Herein, a feasible two-dimensional superstructure of Fe-based Mott-Schottky heterojunction (2D-Fe-N-C) is fabricated by an ice template and pyrolysis coupling strategy, which synergistically achieves the high-performance adsorption and reduction of UO 2 2+ from aqueous solution. The two-dimensional superstructure exposes more active sites and promotes ion transport, thereby increasing the adsorption capacity and accelerating the adsorption rate of the material. In addition, the internal electric field generated by the work function difference formed by each component of heterojunction contributes to improving the conductivity and speeding up the charge transfer. Meanwhile, the resulting charge space at the heterogeneous interface enhances the adsorption of uranium and the reduction reaction. Thus, the designed 2D-Fe-N-C demonstrates excellent adsorption and reduction properties for uranium, with extraction efficiency reaching up to 1348.0 mg/g and achieving adsorption equilibrium within 4 h. Moreover, 2D-Fe-N-C demonstrates high selectivity for various ions and exhibits superior adsorption performance in real water systems. This research offers a feasible strategy based on the synergistic effects of superstructure and interface engineering to achieve highly efficient selective adsorption of uranium.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Qifeng Li,Wenzhi Jiang,Xiaoling Wu,Hongming Lou,Xueqing Qiu,Zhixian Li
Single-atom nanozymes (SAzymes) precisely emulate enzyme catalytic centers at the atomic level, offering exceptional catalytic efficiency and selectivity. Inspired by the heme structure of natural enzymes, this study introduces chlorine axial coordination into the Fe–N3O single-atom nanozyme, constructing a unique Fe–N3O–Cl catalytic site (Fe–N/O/Cl–C SA). As a result, the Fe–N/O/Cl–C SA demonstrates remarkable peroxidase-like activity toward the substrate 3,3′,5,5′-tetramethylbenzidine (TMB), achieving a catalytic efficiency 1.96-fold greater than horseradish peroxidase (HRP). Density functional theory (DFT) calculations further reveal that axial chlorine coordination significantly reduces the reaction energy barrier, complementing the planar oxygen coordination, which shortens the activation pathway for H2O2. Moreover, the Fe–N/O/Cl–C SA efficiently catalyzes the oxidative depolymerization of birch lignin under mild conditions, producing high-value aromatic monomers such as vanillin and cinnamaldehyde. These findings underscore the critical role of chlorine axial coordination in enhancing catalytic performance and highlight the great potential of single-atom nanozymes in biomass conversion and renewable energy applications.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Qiansheng Li,Yi Dai,Hong Lu,Xiaoman Li,Fanghao Cheng,Jiti Zhou
Microbial-driven Fenton reactions are essential sources of reactive oxygen species in the aqueous environment and important pathways for pollutant degradation. However, their rates are usually limited by microbial respiration. Herein, N and Fe co-doped CDs (N, Fe-CDs) were used to construct a biological Fenton system with marine community YEP-1 for ketoprofen (KTP) removal. The addition of N, Fe-CDs significantly increased the aerobic degradation rate of KTP by 60.8 % at 48 h. Further analysis showed that N, Fe-CDs enhanced the microbial electron transfer system activity of YEP-1 to produce more H 2 O 2 . Moreover, the regeneration of Fe(II) in extracellular N, Fe-CDs was achieved under aerobic conditions, which was beneficial to activate the extracellular H 2 O 2 for more ·OH generation. Based on the metagenome analysis, N, Fe-CDs significantly increased the populations of genera Exiguobacterium , Leucobacter and Microbacterium . The enriched genes related to electron transfer and Fe(III) reduction were found to be closely associated with Microbacterium . Furthermore, the relative abundances of genes related to the chemotaxis and degradation of aromatic compounds were also increased. These results indicated that biological enzyme-catalyzed processes and N, Fe-CD-mediated Fenton reaction were jointly involved in KTP degradation. This work further advances our understanding of N, Fe-CDs-mediated microbial Fenton reactions.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Xiaoqin Sun,Xuejiao Feng,Yuan Dang,Sining Yun
Sulfite is deemed as a promising precursor to produce highly reactive species for contaminants remediation. Herein, the urchin-like Ni-Fe-Mo sulfide (NiFeMoS x ) was anchored in-situ on nickel foam as a cathode to activate CaSO 3 for efficient degradation of tetracycline (TC) under natural condition. The degradation efficiency reached 92.7% within 60 min, which was about 1.81 times higher than that of the electro-Fenton process based on NiFeMoS x . The beneficial performance came from the synergistic activation of CaSO 3 by simultaneous rapid redox cycles of Fe(II)/Fe(III) and Ni(II)/Ni(III) on the NiFeMoS x cathode. Specifically, the primary intermediates Fe(II)-HSO 3 - and Ni(II)-SO 3 2- triggered a series of radical chain reactions, accompanied the reduction of Ni(III)/Fe(III) by electrochemistry and electron donor of Mo(IV) and S 2- on the surface of the catalyst. The regeneration of the Fe(II)/Ni(II) was quickly realized and subsequently triggered the chain reactions, which would accelerate the formation rate of reactive species, such as SO 4 ∙ − , ·OH, O 2 ∙ − and 1 O 2 , of which 1 O 2 and O 2 •- played important roles on degradation TC. This work provides a promising application for the efficient removal of persistent organic pollutants by metal sulfide activated sulfite.
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MATERIALS CHEMISTRY AND PHYSICS
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2025
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IF 4.7
Ziwei Chen,JinChang Zhao,Qing Li,Rufen Chen,HuiJiao Zhang,Hui Zhao,Kezhong Wu
The synergistic coupling of different metal species endows mixed transition metal oxides (MTMOs) as electrode materials for supercapacitors with multiple redox reaction pathways and enhances the electronic conductivity. In this study, three MoO 2 @FeMoO 4 electrode materials were derived from the precursor PMo 12 @MIL-101(Fe) by pyrolysis at 600 °C, 700 °C, and 800 °C under an O 2 atmosphere. The precursor was composed of polyoxomolybdate (H 3 PMo 12 O 40 , PMo 12 ) and Fe-based metal-organic frameworks (MOFs) MIL-101(Fe). The structural characteristics of the three obtained MoO 2 @FeMoO 4 composites were characterized by XRD, XPS, SEM, and N 2 adsorption measurement. Then, the effects of the pyrolysis preparation temperature for the MoO 2 @FeMoO 4 composites on the energy storage performance of the supercapacitor electrode were evaluated by cyclic voltammetry (CV) and galvanostatic charge/discharge tests. Among three electrodes, the specific capacitance of 339.6 F g −1 of the obtained MoO 2 @FeMoO 4 (700 °C) electrode was the highest compared to 291.2 F g −1 of MoO 2 @FeMoO 4 (600 °C) and 209.7 F g −1 of MoO 2 @FeMoO 4 (800 °C) at a current density of 0.5 A g −1 in 1.0 M NaOH electrolyte. As a result, the different pyrolysis preparation temperatures can alter the atomic microelectronic state and geometric configuration of the MoO 2 @FeMoO 4 , which can construct a high-density Fe–Mo bimetallic multicatalytic active site, thus affecting the activity of the composites. The excellent pseudo-supercapacitance response of the MoO 2 @FeMoO 4 (700 °C) electrode can be ascribed to its larger S BET and greater number of voids, which can generate more Fe–Mo bimetallic active sites and facilitate the electrolyte diffusion, indicating high energy conversion efficiency for potential application in supercapacitors.
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COMPOSITES PART B-ENGINEERING
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2025
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IF 14.2
Xusheng Chen,Ye Yang,Lina Si,Hongjuan Yan,Zhaoliang Dou,Fengbin Liu,Huanxiong Xia
To address the inadequate bonding strength between machined carbon fiber reinforced polymer (CFRP) and metal, this study investigates a novel precoating treatment utilizing organic nanoparticles. Leveraging the synergistic effect between the silane coupling agent (3-aminopropyl) triethoxysilane (APS) and polydopamine-chelated iron nanoparticles (PDA-Fe), a dense protective layer forms on the damaged CFRP surface. Single lap shear (SLS) tests demonstrated a significant 93 % increase in shear strength for joints with APS-(PDA-Fe) treated CFRP. Comparative studies with inorganic particles—multi-walled carbon nanotubes (MWCNTs), zinc oxide (ZnO), and silica (SiO 2 )—revealed that APS-(PDA-Fe) yielded the highest bonding strength enhancement for milled CFRP. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), surface wettability analysis, and microscopic morphology characterization elucidated the underlying mechanism: the formation of a protective encapsulating layer that repairs and reinforces damaged fibers, combined with abundant polar functional groups (e.g., hydroxyl, amino, quinone) in APS and PDA-Fe, which substantially enhance resin adhesion to the CFRP surface.
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JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Yulu Xu,Yu Mei,Yanjun Li,Chenye Fu,Yuantai Li,Yuheng Zhong,Junxi Song,Gang Yang,Shihuai Deng,Xiaohui Lu,Jiali Peng,Bo Lai
The iron-activated periodate (PI) process may be limited by the sluggish kinetics of Fe(II) regeneration and Fe(III) accumulation. Herein, tungsten boride (WB), serving as a co-catalyst, can effectively overcome the inherent drawback of oxidation reactions. The WB/Fe(III)/PI system exhibited different removal efficiencies toward sulfisoxazole (SIZ) under varying PI concentrations. Based on the qualitative and semiquantitative tests, the generation of reactive species changes with various PI concentrations. Specifically, at low PI concentration, Fe(IV), generated via Fe(II)-mediated PI activation following WB-driven Fe(III) reduction, was the primary reactive species responsible for rapid SIZ removal. However, at high PI concentrations, the limited generation of Fe(IV) contributes only marginally to SIZ removal. In situ Raman characterization and electrochemical tests revealed that at high PI concentration, WB could react with PI and Fe(III) to form high-potential metastable intermediates (WB-Fe(III)-PI*), facilitating direct electron transfer pathway (ETP) from the SIZ to PI. Density functional theory (DFT) calculations further confirmed the interactions among WB, Fe(III), and PI. Besides, at low PI concentrations, the WB/Fe(III)/PI system selectively and rapidly oxidized oxygen-transfer-prone pollutants, while at high PI concentrations, it favored sustained oxidation of electron-rich pollutants. Additionally, WB exhibits excellent reusability during cyclic use. This comprehensive investigation deepens insight into PI-based co-catalytic process and offers an efficient strategy for selecting appropriate oxidant concentrations for wastewater treatment.
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Journal of Energy Storage
·
2025
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IF 9.8
Yongxiang Yuan,Jianglong Kang,Shengping Jin,Dengdeng Ai,Wenying Zhao,Jiatai Wang,Yulong Kang,Xiaoyi Hou
P2-type layered Mn-based excess metal oxide cathode is considered to be one of the most promising cathode materials for sodium-ion batteries (SIBs) due to the open sodium ion diffusion channels and low diffusion energy barrier. However, the deep charge/discharge process of the P2-type layered oxide cathodes at high potential leads to the displacement and irreversible alterations of the crystal structure, thereby resulting in poor rate capability and deteriorated capacity retention. The charge/discharge curves are smoothed after Fe doping. The specific discharge capacity, rate capability and cycling stability of the samples are significantly improved by Fe-doping. When x = 0.03, the obtained Na 0.6 Mn 1-x Fe x O 2 cathode delivers excellent electrochemical performance. The initial discharge specific capacity of the cathode is 193.14 mAh g −1 at 0.1C, and can remain 91.05 mAh g −1 after 100 cycles. The capacity retention rate is as high as 86.02 % when the current density turn back to 0.1C after cycles at different current densities. The present work may propose a strategy to improve P2-type layered Mn-based cathode materials for sodium-ion batteries by a doping method, which will be of great significance for the commercialization of sodium-ion batteries.
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