CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Jiawen Hu,Jieling Liu,Ying Zhang,Xian Wang,Tao Wang,Rongzhou Gong,Yan Nie
Porous carbon materials demonstrate significant potential in electromagnetic wave absorption (EMWA). However, precisely tailoring their composition and microstructure remains a major challenge in developing high-performance electromagnetic wave absorbers. Here, a core-shell Fe-NC@TiO 2 nanocomposite with a dielectric gradient structure is presented, designed to effectively regulate dielectric properties and enhance electromagnetic wave absorption. A combined strategy of hydrothermal synthesis and chemical deposition was developed to achieve the in-situ coating of TiO 2 onto MOFs. Subsequently, a pyrolysis strategy was employed to construct core-shell Fe-NC@TiO 2 nanocomposites. Pyrolysis temperature was used to achieve tunable TiO 2 crystallization while maintaining core-shell architecture. The results indicate that the pyrolysis at 800 °C induces a phase transformation of TiO 2 shell from anatase to rutile, resulting in a high dielectric constant. The core-shell structure effectively optimizes the dielectric dispersion characteristics and impedance matching while improving attenuation performance. The Fe-NC@TiO 2 –800 nanocomposites achieved an effective absorption bandwidth (EAB) of 4.93 GHz at 1.47 mm thickness with 30 wt% filler loading, while simultaneously obtained a remarkable minimum reflection loss ( RL min ) of −50.51 dB at 2.05 mm. This work offers novel insights into the structural design of core-shell nanocomposites with tunable electromagnetic properties and has a broad application prospect in the field of EMWA.
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·96
·
IF 36.3
Fang Wenhan,Xu Kailong,Wang Xinlei,Zhu Yuanhang,Li Xiuting,Liu Hui,Li Danlei,Wu Jun
A universal synthetic strategy was proposed to construct heteroatom axially coordinated Fe–N 4 single-atom seawater catalyst materials (Cl–Fe–N 4 and S–Fe–N 4 ).
The Cl–Fe–N 4 catalyst achieves a limiting current density of 5.8 mA cm −2 and a half-wave potential of 0.931 V vs. RHE in alkaline synthetic seawater, outperforming commercial Pt/C (40 wt%).
The seawater-based zinc-air battery fabricated with Cl–Fe–N 4 demonstrates a power density of 187.7 mW cm −2 at 245.1 mA cm −2 and maintains stable cycling performance for 200 h.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 14
·9219-9229
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IF 4.4
Zhao Mo,Wu Wei,Chen Wei,Dong Yayun,Yang Jing,Shi Yuewu,Li Jinxi,Wang Wenbing,Zhou Yifu,Wang Xutong
The magnetostriction effect of ferrite materials will adversely affect their application in high-precision electrical measurement scenarios. In this study, vanadium pentoxide (V 2 O 5 ) was introduced as both a sintering aid and a dopant in the solid-state sintering process of iron-deficient NiCuZn ferrites with the composition (Ni₀.₂Cu₀.₂Zn₀.₆O)₁.₀₃(Fe₂O₃)₀.₉₇. The results show that the addition of V₂O₅ effectively promots grain growth, increasing the average grain size from approximately 1 μm to 6 μm, and enhances the compactness of the material, which would compensate the magnetization reduction due to the replacement of Fe 3+ by V 5+ . When the doping concentration of V 5+ is controlled below 3 at%, the magnetostriction strain of the ferrite can by minimized to approximately 8 ppm without significant loss of key magnetic properties such as permeability and saturation magnetization. In addition, vanadium doping also improved electrical resistivity of NiCuZn ferrite, thereby reducing eddy current losses and power loss of material under high-frequency (50 kHz and 100 kHz) electromagnetic fields, which make the V 5 ⁺ doped NiCuZn ferrites possibly be used in the high-precision and high frequency measurement.
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 10
·596
·
IF 3.5
Wang Shu,Tian Lijiang,Zhai Zhenyu,Zhang Jie,Pan Fan,Wang Minqi,Zong Mengchen
Fe-based Metal–Organic Frameworks (MOFs) show promise as heterogeneous Fenton-like catalysts; however, in the removal of hydrophobic VOCs, traditional wet Fenton systems suffer from slow Fe 3+ /Fe 2+ cycling and high gas–liquid mass transfer resistance, severely limiting their industrial application. To address these challenges, this study proposes a dual optimization strategy. Specifically, a gas-phase H 2 O 2 Fenton-like system was constructed to overcome mass transfer limits, and multivalent Mn was introduced into the MIL-100(Fe) to accelerate the Fe 2+ /Fe 3+ cycle. Among the synthesized catalysts, MIL-100(Fe 4 Mn 1 ) (4FM) exhibited superior catalytic performance, achieving 85% toluene degradation efficiency and a capacity of 87.17 μg C 7 H 8 /(g·min)) under optimized conditions, significantly outperforming its monometallic counterparts. Characterization results reveal that 4FM retains an ordered crystalline structure with highly dispersed active sites and an optimized pore architecture. Mechanistic studies indicate that Fe–Mn synergy induces an “electron pump” effect, utilizing the thermodynamic potential differences to accelerate the reduction of Fe 3+ to Fe 2+ . Concurrently, the system establishes dual reaction centers (Fe and Mn), where efficient Mn 2+ /Mn 3+ /Mn 4+ and Fe 2+ /Fe 3+ redox cycles facilitate sustained gaseous H 2 O 2 activation into hydroxyl radicals (·OH), promoting efficient toluene degradation. This study provides a promising strategy utilizing gas-phase Fenton-like catalytic technology to overcome kinetic and mass transfer bottlenecks in degrading of hydrophobic VOCs. Graphical
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jun Zhu,Jingjing Chen,Congcong Wang,Dehong Yu,Minghao Chao,Hanrong Yan,Ruqi Huang,Zhenxin Wang,Bin Pan,Fenglei Gao
Insufficient generation of reactive oxygen species and the highly active cholesterol metabolism of tumors are two major barriers limiting the efficacy of conventional ferroptosis-based cancer therapies. Here, we engineered a single-atom iron nanozyme (Fe-NC@TASIN-30@FA, abbreviated as FTF) to overcome ferroptosis resistance and sensitize tumors to apoptosis-coupled catalytic therapy by simultaneously delivering a distal cholesterol synthesis inhibitor and catalytically amplifying ROS production. FTF is constructed by loading a selective 7-dehydrocholesterol (7-DHC) synthesis inhibitor, TASIN-30, onto an iron single-atom nanozyme and further functionalizing it with folate-modified polyethylene glycol (SH-PEG-FA) to confer tumor-targeting capability. Notably, TASIN-30 is incorporated with a drug-loading rate of 22.5%, providing efficient payload delivery without compromising nanozyme activity. The iron active centers in FTF exhibit dual enzyme-mimetic activities. One of them is peroxidase-like activity that breaks down H 2 O 2 into hydroxyl radicals, and the other is glutathione peroxidase-like activity that catalyzes the oxidation of reduced glutathione to oxidized glutathione, thereby increasing intracellular ROS levels and consuming antioxidants to achieve a coordinated iron apoptosis effect. In addition, by inhibiting 7-DHC and cholesterol biosynthesis, FTF accelerates the consumption of excess intracellular cholesterol in tumor cells, disrupts the integrity of lipid rafts, and consequently suppresses tumor cell proliferation. In 143B tumor-bearing nude mice, FTF achieves an in vivo tumor inhibition rate of approximately 82.5%, while exhibiting a maximum tolerated dose of 7.5 mg/kg. Overall, this study proposes a new therapeutic strategy that integrates cholesterol metabolic interference with catalytic nanozyme therapy, providing a potent ferroptosis-apoptosis synergistic modality for tumors refractory to conventional treatments.
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Applied Materials Today
·
2026
·
IF 7
Weixiao Gong,Zhendong Liu,Zheng Wang,Yannan Jia,Guanghui Lu,Lu Li,Xiaoqin Li,Junchi Zhang,Haichen Cui,Yuanxiang Shan,Wanting Feng,Hongqin Xue
FeMn-HATP was synthesized as an efficient Sb(III) adsorbent. • Synergistic oxidative adsorption by FeMn-HATP enhances Sb(III) removal efficiency. • Kinetic, isotherm, and thermodynamic studies investigated FeMn-HATP adsorption. • An Sb(III) degradation mechanistic pathway is proposed. • FeMn-HATP demonstrated excellent regeneration performance in fixed-bed column tests. An affordable, environmentally friendly, simple adsorbent for Sb(III) removal from aqueous solutions was prepared using attapulgite (ATP) as the matrix, and FeSO 4 and KMnO 4 as metal precursors, through an in situ precipitation approach. The morphology, pore structure, and surface chemical properties of the material were analyzed using various characterization techniques. The results indicate that the iron-manganese bimetallic-modified acid-activated ATP (FeMn-HATP) surface is loaded with relatively uniformly distributed iron and manganese components, and its specific surface area and pore structure differ significantly from the original ATP. These changes promote pollutant molecule diffusion and contact. In batch adsorption experiments, FeMn-HATP achieved good Sb(III) removal performance and remained relatively stable within a pH range of 4 −10. The material maintained a relatively stable adsorption capacity even in the presence of high concentrations of other anions. Adsorption of Sb(III) by the modified ATP better conforms to both Elovich kinetic and Langmuir isotherm models, with a theoretical maximum adsorption capacity of 102.79 mg/g at 318.15 K. Fixed-bed cycling experiments demonstrated that FeMn-HATP retained significant adsorption capacity after five NaOH regenerations, with a dynamic adsorption capacity of 14.68 mg/g and a regeneration efficiency of 68.16%. Overall, FeMn-HATP exhibits good potential for Sb(III) removal with a degree of reusability, indicating promise for the treatment of antimony-containing wastewater. Download: Download high-res image (262KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Qinqin Yu,Youzhi Dai,Zhu Zhang,Bo Feng
A novel photo-Fenton coupling system was constructed in this paper to address the problems of low visible light utilization, narrow pH applicability range and difficult separation and recovery of common photo-Fenton. Fe single-atom material with high activity was used as a bridge connecting photocatalysis and Fenton oxidation, and the performance and mechanism of the coupling system were investigated using a typical antibiotic ciprofloxacin (CIP) as the target pollutant. It was found that the degradation performance of the photo-Fenton coupling system is significantly improved, and can be maintained in acidic, neutral and alkaline wastewaters; the main active species of the coupling system are ·O 2 – , 1 O 2 and h + , and the enhancement mechanism is a combination of Fe single atoms, S-scheme heterojunction and multiple active species.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 14
·40534-40550
·
IF 5.8
Fang Lei,Wu Guojian,Yao Keyu,Zhang Dongyang,Zhou Yongchao
A novel heterogeneous catalyst named MoS 2 /MIL-53(Fe, Cu) (MMFC) was prepared by hydrothermal method and applied in a heterogeneous electro-Fenton (hetero-EF) system for lomefloxacin (LOM) degradation in this work. Under the optimal conditions of current density 3 mA/cm 2 , catalyst dosage 0.100 g/L, and initial pH 6, 93.5% LOM (2 mg/L) removal efficiency was achieved in the MMFC hetero-EF system within 60 min, indicating an obvious improvement compared with the MIL-53(Fe, Cu) hetero-EF system. The good catalytic activity was attributed to more effective active sites of the catalyst and the conversion of Fe(II)/Fe(III) and Cu(I)/Cu(II) promoted by Mo(IV) in MoS 2 , which could be inferred by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) characterizations. The reusability and stability of MMFC were explored based on five cyclic experiments, and the average degradation efficiency reached 73.9%. Furthermore, the hetero-EF system could achieve the total removal of moxifloxacin and tetracycline within 6 min and 40 min, respectively. Quenching experiments revealed that the hydroxyl radicals (·OH) were the main reactive radicals while superoxide radicals (·O 2 − ) and singlet oxygen ( 1 O 2 ) played a certain part in LOM degradation. Finally, the possible mechanism of the hetero-EF process and LOM degradation pathways were proposed, including substitution, elimination, and cleavage of ring structures. Accounting for good catalytic performance, low preparation cost, and satisfactory versatility, the MMFC exhibited good potential to work as a hetero-EF catalyst for wastewater treatment.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xin Fang,Ling Tan,Haopeng Luo,Fang Jiang,Huan Chen
Designing electrocatalysts for nitrate (NO 3 - ) reduction with excellent activity, low cost and stability is of great interest. Herein we synthesized a novel transition bimetallic phosphide (CuFeP-x, x referred to the phosphidation temperature) catalyst by phosphidation using CuFe-Prussian blue analogue (PBA) nanoparticles as the precursor. The obtained CuFeP-450 maintained the morphology of nanocube with the average size of 33.0 nm and bimetallic phosphide nanoparticles formed during the phosphidation process. The higher electrocatalytic activity of CuFeP-x in electrochemical NO 3 - reduction were attained as compared to that of calcined CuFe-450, because the CuFeP-x have a lower interface impedance and the dominated species for NO 3 - reduction changes from electron to atomic H* , which effectively enhanced the removal rate. The appropriate phosphidation temperature can form a crystal structure that facilitated reaction kinetics. As a result, CuFeP-450 showed the best electrocatalytic performance for NO 3 - reduction (99.42%), and the selectivity of N 2 can reach nearly 100% under the condition of 1000 mg L −1 chloride ions . This simple method using PBA with binary transition metals to prepare bimetallic phosphide provides a new direction for designing efficient non-noble metal electrocatalysts for NO 3 - reduction.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Fenli Liu,Yujing Ren,Jianglin Duan,Pengcheng Deng,Jianyu Lu,Huibin Ge,Xin Liu,Qixing Xia,Haifeng Qi,Na Yang,Yong Qin
Activating hydrogen peroxide (H 2 O 2 ) to produce hydroxyl radical ( • OH) (Fenton-like process) is of great importance in heterogeneous catalytic oxidations. However, most of transition metal nano-catalysts as well as recently reported carbon supported Fe-N 4 single atom catalysts (SACs) suffer from unsatisfactory catalytic performance. Herein, a novel Fe 1 /C 3 N 4 SAC with Fe-N 5 active site was constructed. Using this SAC, the electron/structure-symmetry of Fe-N 4 site can be broken by axial nitrogen-coordination, which transforms less active Fe-N 4 species into highly active Fe-N 5 species in Fenton-like reaction. Specifically, Fe-N 5 site exhibits an unprecedented activity for 3,3′,5,5′-tetramethylbenzidine oxidation, which is at least one order of magnitude more active than reported Fe-N 4 /C SACs. Mechanism studies reveal that the unique role of axial nitrogen-coordination over Fe-N x sites is to change the adsorption behavior of H 2 O over Fe-N 5 site without influencing H 2 O 2 activation. This discovery provides a new approach for rationally designing efficient catalysts in Fenton-like reactions.
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CHEMOSPHERE
·
2022
·
IF 8.943
Jiaojiao Yang,Binyu Guo,Lei Li,Quanyuan Chen,Chensi Shen,Juan Zhou
The limited regeneration of Fe 2+ in the Fe-catalyzed advanced oxidation processes (AOPs) constrained its application for the removal of organic pollutants. Herein, MoSe 2 was introduced to promote the degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) in the Fe 2+ /PMS system. Compared with Fe 2+ /PMS processes, the 2,4-D degradation efficiency and PMS decomposition rate respectively increased by 73.8% and 84.2% in the MoSe 2 /Fe 2+ /PMS system. DFT simulation results suggested that Se atoms acted smoothly as the bridge supporting the charge transfer from Mo to adjacent Fe atoms, which led to the reduction of Fe 3+ . The rapid regeneration of Fe 2+ boosted the activation of PMS and the degradation of pollutants. Additionally, the electron paramagnetic resonance (EPR) and quenching experiments results indicated that SO 4 ∙ − , ∙OH, and 1 O 2 accounted for 2,4-D degradation, and SO 4 ∙ − and 1 O 2 predominated the reaction. The Mo based co-catalysts showed better co-catalytic effect than the W counterparts, and the moderate adsorption for PMS and lower electron transfer electron transfer resistance accounted for the more excellent co-catalytic performance of MoSe 2 than that of WSe 2 . In addition, the degradation efficiency of 2,4-D was up to 95.5% after five cycles of MoSe 2 in the co-catalytic system. The coexistent humic acid (HA) and Cl − showed ignorant negative effect on the degradation, while HCO 3 − would depress the oxidation reaction. The acidic etching wastewater can be applied as the Fe ions source in this co-catalytic process to remove 2,4-D effectively.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Meng Zhang,Yu Zhang,Yucong Chen,Xiaoru Tian,Lingzhi Liu,Yizhong Wang,Ruijie Guo,Hong Yan
MIL-88(Fe) was used as an oxidant and a hard template for the synthesis of polypyrrole (PPy) on its surface, and the formation of PPy made the surface of MIL-88(Fe) rougher as well as more voids formed in the interior. The increased specific surface area allowed more benzotriazole (BTA) (17.8 wt%) loaded on PPy/MIL-88 particles. BTA/PPy/MIL-88(Fe) was employed as a novel corrosion inhibitor to enhance the corrosion resistance of epoxy coating for carbon steel. BTA/PPy/MIL-88(Fe) filler improved the corrosion resistance of EP coating without/with artificial scratch by delaying the cathodic and anodic reactions in corrosive media. Both BTA and MIL-88(Fe) played the role of corrosion inhibitors, making EP coating possess active corrosion protection and pH-sensitive performance. Besides, BTA/PPy/MIL-88(Fe) enhanced the adhesion of EP coating by filling the pores inside.
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