JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Long Chen,Zhiqing Liu,Youpeng Xiong,Shiyu Liu,Rui Li,Chao Huang,Xinghuan Liu,Xin Jia
Developing single-atom nanozymes (SAzymes) with neighboring metal atom active centers composed of homogeneous metal atoms and precisely regulating the distance of atom pair is still purposeful but challenging. Herein, we report an atomic-scale inter-site distance engineering for rationally designing Fe-SAzymes by regulating the inter-site distance of Fe active centers. The resulting Fe-SAzymes displayed enhanced and tunable peroxidase-like activity and Michaelis-Menten kinetics. Among FeN 4 -SAzyme, Fe 2 N 8 -SAzyme, Fe 2 N 7 -SAzyme and Fe 2 N 6 -SAzyme configurations, the Fe 2 N 7 -SAzyme demonstrates exceptional specific activity (24.72 U mg −1 ). Meanwhile, the density functional theory (DFT) calculations revealed that Fe 2 N 7 -SAzyme exhibited a higher performance of peroxidase-like catalytic activity than Fe 2 N 6 -SAzyme attributed to the strong electron donor ability the neighboring Fe active atom and approaching Fermi level of electronic structure. Furthermore, the resultant Fe 2 N 7 -SAzyme is capable of pesticide detection under low concentrations (2–10 mg L −1 ), which reached the limit of detection to 0.72 mg L −1 of malathion molecules. This work contributes to the rational design and regulation strategy for enhancing the peroxidase-like catalytic activity of SAzymes via atomic-scale inter-site distance engineering.
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高影响因子
Journal of Materials Chemistry A
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2025
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IF 9.5
Mingjing Ma,Huanhuan Yu,Baolin Zhu,Wenjun Zheng,Shoumin Zhang
The design of efficient catalysts with atom clusters (ACs) and single atoms (SAs) as active sites for water splitting presents an effective approach for improving bifunctional electrocatalytic performance by synergistically promoting electron transport and proton transfer kinetics. In this work, a series of Fe2O3-supported noble metal catalysts (M = Ru, Rh, Pd, Ag) incorporating both ACs and SAs sites were developed, with detailed characterization identifying Ru ACs as the primary active centers. The designed-interfacial M-O-Fe bonds play a critical role in charge redistribution, subsequently enhancing electron and proton transfer kinetics. The resulting heterostructure optimizes both the electronic environment and active site accessibility, yielding exceptional electrocatalytic performance. Further density functional theory calculations demonstrate that the incorporation of Ru species leads to increased filling of antibonding orbitals and modulation of the d-band center, subsequently reducing the energy barrier of the rate-determining steps to −0.267 eV for HER and 1.522 eV for OER, respectively. Consequently, the representative Ru/Fe2O3 with Ru content of 1.1 wt.% achieves an OER overpotential of 189 mV and a HER overpotential of 21 mV at a current density of 10 mA cm−2. This study highlights a novel approach to the design of advanced bifunctional electrocatalysts by engineering interfacial bridge bonds.
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Environmental Technology & Innovation
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2025
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IF 7.1
Shuzhen Yang,Bingjing Tian,Yanfang Huang,Bingbing Liu,Shengpeng Su,Wenjuan Wang,Guihong Han
The persistent dye rhodamine B (RhB) in textile wastewater poses severe ecological threats, demanding efficient and sustainable treatment technologies. This study synthesized a novel trimetallic Cu-Fe-Co catalyst via a nitrogen-atmosphere co-reduction method. The catalyst’s unique advantage lies in the synergistic effects of Cu, Fe, and Co, which significantly enhance catalytic performance. The redox-active phases of Cu, combined with the Fenton-like reactivity of Fe, are further optimized by Co doping to improve reactive oxygen species (ROS) generation and electron transfer efficiency. Characterization revealed a dendritic structure dominated by Cu, Cu₂O, and FeO phases, with Co-induced lattice expansion (Δ d / d = +0.25 %) enhancing surface reactivity. Under optimized conditions (pH 3, 1.5 g/L catalyst, 20 mg/L RhB), the ternary Cu-Fe-Co catalyst achieved 99.8 % RhB degradation within 40 min, with high mineralization efficiency (46.5 % TOC removal, 82.1 % COD removal). Mechanistic studies demonstrated that Co incorporation promotes the conversion of superoxide radicals (·O₂⁻) into long-lived singlet oxygen (¹O₂), synergistically enhancing oxidative effects from ·OH and ¹O₂, while in situ H₂O₂ generation drives radical chain reactions. Compared to binary catalysts, the ternary system exhibits superior degradation kinetics for RhB and maintains 95.8 % degradation efficiency even after five cycles. This study provides new insights into trimetallic catalyst design, highlighting its practical potential for wastewater treatment.
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Progress in Natural Science-Materials International
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2025
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IF 7.1
Xu Wang,Qiang Zhang,Shuangjie Chu,Tong Qin,Qian Liu,Zhengzheng Li,Jun Wang,Jiayu Wan,Bo Mao
Zinc-bromine flow batteries (ZBFBs) are promising for sustainable energy storage due to their high energy density and cost-effectiveness. However, the sluggish kinetics of the Br 2 /Br − redox reaction at the cathode limits their performance. Here, we developed Fe/N co-doped micro-mesoporous carbon nanofibers (Fe-N-CNFs) as a high-performance cathode catalyst. Synthesized via electrospinning Fe/Zn-ZIFs with PAN/PVP, followed by carbonization, the Fe-N-CNFs exhibited a hierarchical pore structure with a specific surface area of 1057 m 2 g −1 and an average pore size of 2.5 nm. The optimized catalyst, doped with 4 wt% Fe, achieved an energy efficiency of 81 % at 80 mA cm −2 and maintained a Coulombic efficiency of 98.4 % over 200 cycles. This work demonstrates the potential of integrating electrospinning with MOF-derived catalysts to enhance ZBFB performance, offering a scalable solution for high-efficiency energy storage systems.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Jiahui Ma,Bin Jiang,Longfei Zhang,Feihong Chu,Na Yang,Yongli Sun,Luhong Zhang
Traditional textile wastewater treatment methods face significant challenges in achieving effective dye/salt separation with low energy consumption. In this study, a high-performance loose nanofiltration (LNF) membrane based on metal-polyphenol bio-adhesion was fabricated. By exchanging Fe 3+ onto Laponite (Lp) nanosheets, the coordination between tannic acid (TA) and Fe 3+ was controlled, optimizing the structure of the selective layer. Subsequently, PVP was introduced to regulate membrane structure owing to the hydrogen bonding between TA and PVP, thereby enhancing both separation performance and stability of the membrane. The optimized Fe@Lp/TA-PVP membrane exhibited favorable separation performance by modulating preparation conditions including the Fe 3+ exchanging on Lp nanosheets, PVP concentration, and coating time. The LNF membrane possessed high water permeability (167.7 L·m −2 ·h −1 ·bar −1 ) and favorable separating efficiency for dyes from salts. A high rejection of 99.9 % was achieved for Congo Red and Methyl Blue, while the rejection of Na 2 SO 4 and MgCl 2 remained low, at 8.93 % and 2.21 %, respectively. Besides, the membrane demonstrated desirable antifouling capability. Therefore, this work enriches the applications of metal-polyphenol coordination in water treatment, provides new insights into the design of LNF membranes.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Fei Chai,Samuel Kolog Badazabra,Feiping Zhao,Xu Yan,Qingwei Wang,Xiaobo Min,Liyuan Chai
Arsenic is a widely acknowledged environmental pollutant commonly found in both natural and industrial water systems, posing critical risks to both ecosystems and human health. This study introduces an iron-modified MnMg layered double hydroxide (FeMnMg-LDH) engineered to enhance arsenic removal efficiency for both As(III) and As(V) under environmentally relevant conditions. The materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). The incorporation of Fe into MnMg-LDH led to increased surface area, optimized surface chemistry, and mitigated particle aggregation, thereby exposing additional active sites. The FeMnMg-LDH demonstrated remarkable adsorption capacities of 106.67 mg g −1 for As(III) and 107.63 mg g −1 for As(V), representing a sixfold and twofold enhancement, respectively, over the pristine MnMg-LDH. Adsorption kinetics and isotherms aligned closely with pseudo-second-order and Langmuir models, indicating monolayer chemisorption. Competitive anion experiments revealed minimal interference except for PO 4 3- , underscoring the material’s selectivity. The FeMnMg-LDH retained > 80 % of its initial capacity after three regeneration cycles, demonstrating robust reusability. The mechanisms investigation reveals a synergistic oxidation-adsorption process, where Fe/Mn redox couples facilitated As(III) oxidation to more adsorbable As(V), coupled with immobilization via coprecipitation, surface complexation, electrostatic interactions, and ion exchange. These findings reveal that FeMnMg-LDH is a promising sorbent for arsenic-contained wastewater treatment, offering practical advantages in stability, efficiency, and scalability.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Yuzhe Liu,Qi Li,Yuhan Liang,Junhao Liang,XuLei Sui,Zhenbo Wang
The non-precious metal Fe-N-C catalyst is regarded as a potential substitute for the precious metal catalysts for the oxygen reduction reaction (ORR) application. However, its catalytic activity and stability still fall short of those of the precious metal catalysts. Here, Fe-N-C catalyst with an ordered macroporous framework was achieved through using polystyrene (PS) as templates. The results indicate the particle size and structural orderliness of PS templates have great influence on the morphology and the catalytic performance of the obtained Fe-N-C catalysts. The optimized catalyst, derived from ordered PS with 200 nm, exhibits exceptional ORR activity in acidic media with a half-wave potential of 0.885 V (vs. RHE), surpassing commercial Pt/C (0.847 V) and Fe-N-C without PS counterparts (0.796 V), and superior mass activity (26.54 A g⁻¹, 0.8 V) and kinetic current density (14.7 mA cm⁻²,0.85 V), while maintaining outstanding durability under 30,000 potential cycles (18 mV loss). The catalyst, as the cathode in an H₂/O₂ fuel cell, exhibits a peak power density of 0.83 W cm⁻². This excellent activity arises from its regular morphology combined with ordered macroporous framework facilitating active site exposure and reactant diffusion. The regularly arranged template-induced structural ordering enhances the graphitization and integrity of carbon matrix during pyrolysis, promoting the stability. These findings establish a template-size-dependent design principle for non-precious metal catalysts, offering a viable pathway to balance activity-stability trade-offs in proton-exchange membrane fuel cells and related electrochemical energy technologies.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Yingying Zhang,Shuai Dong,Chong Wan,Yuqi Zhu,Suhang Chen,Fengqi Zhao,Kangzhen Xu
Ammonium perchlorate (AP), cyclotrimethylenetrinitramine (RDX) and 1,1’-dihydroxy-5,5’-ditetrazolium dihydroxyl ammonium (TKX-50) play a vital role in aerospace and military applications. However, improving their thermal decomposition performance remains a critical technical bottleneck. In this study, CuBi 2 O 4 (CBO) was selected as combustion catalyst due to its superior thermal stability and structural tunability, and Fe doping strategy was introduced to modulate its electronic band structure. The effective incorporation of Fe in CBO not only induces lattice distortion, but also stabilizes the thermodynamic nonequilibrium state, thereby reducing the energy barrier for electron transfer and effectively suppressing carrier recombination. Fe-CBO exhibits narrow band gap (1.73 eV), excellent electron transport properties and abundant active sites, which can significantly improve catalytic performance. Systematic optimization of Fe-doping contents reveals that 15 %Fe-CBO has optimal catalytic performance, reducing thermal decomposition peak temperatures of AP, RDX, and TKX-50 by 76.3, 5.7 and 36.3 °C respectively, while lowering apparent activation energies to 125.26, 182.34 and 164.60 kJ·mol −1 . Laser ignition experiments further demonstrates that 15 %Fe-CBO can enhance flame brightness, expand the flame propagation area of AP, RDX and TKX-50, and reduce the time to achieve stable combustion. Moreover, the burning rate of the AP-based composite solid propellant is increased by 1.95 times after the introduction of 15 %Fe-CBO. The decomposition mechanism of AP, RDX, and TKX-50 catalyzed by 15 %Fe-CBO was proposed based on valence band theory and comprehensive experimental characterization. Fe-doping strategy provides a novel approach for the design of efficient combustion catalysts.
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高影响因子
Sustainable Materials and Technologies
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2025
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IF 9.2
Dawei Gao,Qiaoli Lu,Jiajun Tang,Lili Wang
Norfloxacin (NOR), a common antibiotic, generates substantial wastewater during the production process. This wastewater infiltrates lakes, rivers, and groundwater systems, giving rise to water pollution. It also poses risks of human accidental ingestion. Once entering the human body, NOR may cause damage to organisms and enhance drug resistance, thereby posing a severe threat to human health. NOR has been recognized as an emerging micro-pollutant, and traditional wastewater treatment technologies struggle to efficiently remove it. Therefore, there is an urgent need to develop an effective and environmentally friendly technology for the removal of norfloxacin from water. In this study, a reusable fabric-based highly efficient catalyst, DHCA@MoS 2 @CMCF-Fe, was developed. The research results indicate that under mild stirring conditions, the surface of DHCA@MoS 2 @CMCF-Fe can generate abundant free charges, enabling the efficient activation of peroxomonosulfate (PMS). Moreover, the exposed Mo(IV) active sites in DHCA@MoS 2 @CMCF-Fe effectively accelerate the electron transfer and redox cycle of Fe(II)/Fe(III), ensuring the continuous and efficient activation of PMS. Furthermore, the synergistic effect between MoS 2 and Fe further optimizes the electron conduction pathway, enhancing the efficiency of charge separation and transfer within the system, and enabling the continuous generation of a large number of highly reactive radicals. The degradation rate of NOR by the DHCA@MoS 2 @CMCF-Fe system can reach 95.7 %, which is 102 % higher than that of the DHCA@MoS 2 @CMCF system. In experiments exploring the effects of various inorganic anions on the degradation of NOR, it was found that Cl − and SO 4 2− had relatively minor impacts on NOR degradation. In contrast, HCO 3 − exerted a certain inhibitory effect, causing the degradation rate to decline from 95.7 % to 80 %. To elucidate the degradation mechanism of NOR, quenching experiments and electron paramagnetic resonance (EPR) spectroscopy were conducted. The results confirmed that 1 O 2 and SO 4 − · were the key reactive species dominating the degradation of NOR. Subsequently, a detailed analysis was performed to uncover the catalytic mechanism by which the DHCA@MoS 2 @CMCF-Fe system degrades NOR. Furthermore, after five cycles of reuse, the catalyst maintained high catalytic activity, with the degradation rate of NOR remaining above 85 %. Aiming at the drawbacks of traditional powder catalysts, such as difficult recovery and potential for secondary pollution, this study supported the catalyst on fabric, effectively addressing these issues to the greatest extent. This research not only opens up a new pathway for the application of PMS in the treatment of antibiotic-contaminated water but also fully demonstrates the immense application potential of DHCA@MoS 2 @CMCF-Fe in the removal of organic pollutants, providing novel ideas and directions for the development of environmental remediation technologies.
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高影响因子
JOURNAL OF FOOD ENGINEERING
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2025
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IF 5.8
Sihang Li,Xun Zhou,Jiahao Cui,Xingjian Zou,Zijian Li,Wirote Youravong,Ming Li,Haihua Wang,Zhenyu Li
Residual Alicyclobacillus acidoterrestris severely impacts juice quality. Conventional thermal treatments fail to completely eliminate bacteria and simultaneously cause the loss of heat-sensitive components. Ultrafiltration (UF) has been a nonthermal alternative to conventional thermal process for the sterilization of apple juice. However, membrane fouling, particularly biofouling is an obstacle for deployment of UF in food processing. In order to tackle the challenging issue of membrane biofouling while ensuring food safety, functionalized UF membrane was developed by multi-stage modifications including metal chelator coating and chlorogenic acid-encapsulated MIL-53(Fe) microparticle grafting. The engineered membrane was applied for cold sterilization of apple juice to remove Alicyclobacillus acidoterrestris . Results showed that (i) the engineered membrane could release chlorogenic acid in response to pH stimulation, (ii) the steady state flux of engineered membrane was maintained higher than the pristine membrane after filtration with contaminated apple juice. Only 4.9% viable bacteria were observed on the membrane surface, (iii) the antibacterial mechanism of engineered membrane was mainly due to the disruption of cellular structural integrity and enhanced permeability of cell membranes, which caused the damage to A. acidoterrestris cell, (iv) after filtration, the Fe 3+ concentration in the permeate solution was almost undetectable. The engineered membrane can simultaneously exclude and inactivate A. acidoterrestris in apple juice, while demonstrating excellent anti-adhesion and anti-biofouling properties. Furthermore, the engineered membrane complies with food safety requirements, which verifies that this metal-organic framework modification method has the potential for practical application in food processing.
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高影响因子
JOURNAL OF CATALYSIS
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2025
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IF 6.5
Qi Chen,Xingxing Huang,Cheng Liu,Yueling Chen,Jionghua Wu,Jimmy C. Yu,Ling Wu
The attainment of rapid charge mobility and effective N 2 activation is of critical importance for photocatalytic nitrogen fixation but it has always been a challenge. Such challenge may be met by the construction of a Type II MoS 2 nanoparticles/ MIL-100(Fe) heterojunction photocatalyst. The new material possesses charge migration channels that facilitate the separation of photogenerated carriers. This charge redistribution during photocatalysis is confirmed by experimental results showing a decrease of charge density on the Fe species and an increase of that on Mo. Moreover, DFT calculations show that the adsorption of N 2 and H 2 O is more likely to occur on Fe sites and Mo sites, respectively. These findings clearly suggest a drastically improved spatial isolation of reduction and oxidation sites on the photocatalyst as compared to pristine MIL-100(Fe). The optimized MoS 2 /MIL-100(Fe) exhibits a NH 4 + yield rate of 1.29 μmol·h −1 as excellent utilization of photoinduced electron-hole pairs and effective adsorption and activation of N 2 become possible. This work offers an insight on the synergy of heterojunction engineering with coordinated activation for photocatalytic ammonia synthesis.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Zheyu Huang,Jingzhong Kuang,Tingsheng Qiu,Mingming Yu
Metal-phenolic networks (MPNs) offer a promising, environmentally compatible strategy for cleaner, more efficient tungsten resource utilization due to their tunable structures and efficient interfacial regulation. This paper investigates the structural regulation effect of a self-assembled Fe(Ⅲ)-tannic acid (TA) MPN, formed through the coordination of TA and Fe 3 + , on the flotation separation of scheelite and calcite. The adsorption mechanisms were elucidated through contact angle, adsorption capacity, zeta potential and XPS analyses, while TEM, UV–vis spectroscopy and DFT calculations were employed to probe the micro- and coordination structures. The results demonstrated that the Fe(Ⅲ)-TA MPN formed at pH= 4 with TA:Fe= 1:1/2 exhibited minimal inhibition of scheelite but strong suppression of calcite, yielding a tungsten concentrate with a WO 3 grade of 71.35 % and recovery of 86.94 %. This behavior was attributed to the formation of a mono-coordination network (Fe:TA=1:1), which adsorbed onto both mineral surfaces through Fe-mediated interactions. In contrast, the tris-coordination network (Fe:TA=1:3) displayed the highest intrinsic reactivity but was limited by Fe(OH) 3 colloid deposition, hindering collector adsorption. The bis-coordination network (Fe:TA=1:2) remained stable over pH= 3–8 and selectively adsorbed on calcite via synergistic electrostatic attraction, hydrogen bonding, and chemical bonding, forming stable hydrophilic films. However, strong electrostatic repulsion hindered Fe(Ⅲ)–TA MPN adsorption on scheelite, thus maintaining its floatability. This study elucidates the structure-function relationship of Fe(III)-TA MPNs, offering new perspectives for designing environmentally friendly inhibitors for selective tungsten flotation.
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高影响因子
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