Royal Society Open Science
·
2025
·Vol. 12
·期 11
·
IF 2.9
Omar Mirna,Omar Sarah,El-Subruiti Gehan M.,Attia Nour F.,Eltaweil Abdelazeem
With growing concerns over water pollution and depletion of freshwater resources, finding sustainable and cost-effective solutions for water treatment is crucial. This study introduces a novel MIL-53(Fe)/Mn-doped SrTiO3 (MIL-53(Fe)/Mn-STO) direct Z-scheme photocatalyst, designed to efficiently degrade organic contaminants in water. Specifically, the photocatalytic degradation of o-nitrophenol (ONP) was investigated under an Xe lamp. The MIL-53(Fe)/Mn-STO photocatalyst demonstrated a maximum removal efficiency of 97.75% within 90 min, with a rate constant (k) of 0.0374 min−1, outperforming the individual MIL-53(Fe) and Mn-STO photocatalysts. A comprehensive analysis of the material’s properties was conducted using Fourier transform Infrared spectroscopy, energy dispersive X-ray spectroscopy, scanning electron microscopy, diffuse reflectance spectroscopy and photoluminescence techniques, and the photocatalytic activity was evaluated under various conditions, including variations in pH, ONP concentration, catalyst dosage and the presence of inorganic anions. The improved photocatalytic activity of the MIL-53(Fe)/Mn-STO system can be ascribed to the synergistic interaction between its two components, which also contributed to its excellent recyclability over five cycles. These findings demonstrate that MIL-53(Fe)/Mn-STO is a highly effective and sustainable photocatalyst with a strong potential for wastewater treatment applications.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Xiaozeng Miao,Borui Cai,Weiwei Wang,Wenhao Wu,Xiaole Weng,Daohui Lin,Kun Yang
Catalytic polymerization represents a promising approach for the removal of sulfonamide antibiotics (SAs) with minimal oxidant demand. Here, we developed a biochar-supported Fe single-atom catalyst (Fe 1 /DNBC) featuring Fe-C x coordination anchored at carbon defects, enabling selective peroxymonosulfate (PMS) activation toward polymerization of SAs. Fe 1 /DNBC achieved 93.4% sulfamethoxazole (SMX) removal and 73.5% total organic carbon (TOC) reduction within 10 min at a low PMS dosage (0.06 mM), corresponding to an approximately 90% reduction in oxidant demand relative to the theoretical requirement for complete mineralization. Mechanistic studies revealed that Fe-C x sites created electron-deficient microenvironments that promoted PMS chemisorption and the formation of surface-bound PMS complex (PMS*) as the dominant reactive species. The shortened O β -O γ and S-O β bonds in PMS* suppressed radical formation and oxygen-transfer pathways, thereby favoring a selective electron-transfer-driven polymerization pathway. Electrochemical analysis demonstrated that the oxidation potential of PMS* could be tuned by PMS concentration, regulating the balance between polymerization and mineralization. This system exhibited robust performance across complex water matrices and continuous-flow conditions. More importantly, Fe 1 /DNBC/PMS treatment effectively eliminated the phytotoxicity of SMX-contaminated water, shifting wheat shoot and root responses from 49.7% and 72.3% inhibition to 19.8% and 17.0% promotion, respectively. This work establishes a Fe-C x coordination engineering strategy to regulate PMS activation pathways, enabling efficient and selective removal of SAs with reduced oxidant consumption and mitigated environmental risks.
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POLYHEDRON
·
2026
·
IF 2.8
Haiyan Tao,Ye Zhang,Weixiong Dong,Jianyue Li,Huwei Lan,Na Xia
Organic dye pollutants is one of the serious pollutants in recent years，which is a major global challenge that threatens human health and sustainable societal development. Therefore, effective efficient removal of organic contaminants from water has thus become a vital issue. As an advanced oxidation process, the Fenton reaction has gained considerable attention owing to its effectiveness in degrading refractory organic pollutants. In this study, a simple sol-gel process was used to prepare carboxymethyl fiber copper‑iron complex (Fe/Cu-CMF) heterogeneous Fenton reaction catalyst by co-coordination with copper (II) and iron (III) using esterification-modified cottonseed meal fiber (CMF) as raw material. The results showed that the Fe/Cu-CMF membrane grafting was successful, and the carboxyl group was successfully introduced into the fiber surface structure by the esterification reaction. The preparation of a carboxylate fiber iron‑copper complex through coordination with Fe 3+ and Cu 2+ was carried out for the degradation of reactive red 195 dye, and its catalytic performance was evaluated. Under light irradiation, Fe/Cu-CMF significantly enhanced dye degradation, achieving a decolorization rate of 95.6% in 50 min. The catalyst exhibited optimal activity at pH 3.0 and maintained high efficiency over five consecutive reuse cycles, with the decolorization rate consistently at 95% without significant loss of activity. The research indicates that Fe/Cu-CMF materials are highly promising for use in technologies aimed at treating organic dye wastewater.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Chong Zhang,Xinbao Li,Lei Chen,Gonggang Sun,Qi Wang
Liquid hydrogen is attractive for large-scale hydrogen storage and long-distance transport because of its high volumetric energy density. However, exothermic ortho-para hydrogen conversion at cryogenic temperature causes boil-off loss and requires efficient catalysts. Iron-based catalysts are widely used, but their practical application is limited by poor stability under water, oxygen, and impurity attack. Herein, Fe@SiO 2 core-shell catalysts with tunable shell thicknesses were prepared by precipitation combined with hydrolytic coating and evaluated at 77 K. An amorphous SiO 2 shell was uniformly formed on the iron-based particles without destroying the active phase. The optimized catalyst achieved an outlet para-H 2 content of 47.5% and remained stable over 120 h. The improved catalytic performance is attributed to the SiO 2 coating, which enhances the structural stability of the iron-based particles while retaining accessible mesoporous transport pathways. These pathways facilitate H 2 transport to the iron-based active phase while reducing its exposure to the external environment.
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高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Qi Cheng,Tenghui Qiu,Jiashun Liu,Zixuan He,Hua Tian,Lingfeng Shi,Gequn Shu
Photo-assisted lithium‑carbon dioxide battery (Li-CO 2 ) can utilize the charge carriers generated at the cathode by light to reduce the kinetic barriers of carbon dioxide reduction and lithium carbonate decomposition reactions. However, rapid recombination of photogenerated carriers and sluggish interfacial charge transfer still lead to high overpotentials and limited cycle life in photo-assisted Li-CO 2 batteries. Therefore, it is crucial to design highly efficient photocatalysts that can suppress carrier recombination and accelerate interfacial charge transfer for rational optimization. Herein, we adopted the design strategy of metal ion doping and synthesized a Fe-doped ZnS (Zn 1-x Fe x S, denoted as ZFS-x) photocathode by the hydrothermal synthesis method. The doping of iron ions effectively regulates the electronic structure of ZnS, inhibits the recombination of photogenerated carriers, and accelerates the interfacial charge transfer kinetics. The photo-assisted ZFS-x cathode delivers a markedly prolonged cycling lifetime of up to 300 cycles (600 h) at a current density of 0.01 mA cm −2 , substantially exceeding that achieved under dark conditions (144 h). Furthermore, the single-cycle overpotential is significantly reduced from 2.27 V in the dark to 0.49 V under illumination. Morphology studies confirm that appropriate Fe-ion doping significantly enhances the uniformity of the discharge products, which are present as uniformly dispersed nanoscale particles rather than densely packed plate-like or aggregated structures. Moreover, their highly reversible decomposition during charging effectively mitigates pore blockage and interfacial passivation. These results indicate that the incorporation of iron can improve charge separation and regulate the formation and decomposition of Li 2 CO 3 , thereby effectively modulating the ZnS photocathode and ultimately enabling the development of photo-assisted Li-CO 2 batteries with low overpotential and long cycle life.
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高影响因子
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
·
2026
·Vol. 96
·期 9
·283
·
IF 1
Qing Yan,Chai Chunxiao,Li Kuan,Jiang Ye,Li Jingjing
MOF-based nanozymes are promising for colorimetric biosensing but are often limited by rigid coordination environments and poor active-site accessibility. Here, a 2-methylimidazole-regulated MIL-88B(Fe) nanozyme (2-MIM@MIL-88B) was prepared via an in situ coordination-competition strategy. Compared with pristine MIL-88B(Fe), 2-MIM@MIL-88B retained a spindle-like morphology but showed reduced crystallinity, nitrogen-containing species, pore-texture reorganization, and local Fe-site electronic modulation with increased defect-related centers. These changes correlated with enhanced peroxidase-like activity in the TMB-H 2 O 2 system, despite a reduced BET surface area. In a glucose oxidase-coupled colorimetric assay, 2-MIM@MIL-88B enabled glucose detection over 0.015–0.5 mM with a detection limit of 1.7 µM.
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高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Xingchen Pan,WenKai Li,Chen Wang,Zhiyong Xie
Owing to the high theoretical energy density, lithium–sulfur batteries (LSBs) have been regarded as a highly competitive technology for next-generation energy storage systems. However, the commercial deployment of LSBs is affected by the diffusional loss of lithium polysulfides (LiPSs) and the inherently slow electrochemical conversion rates. Dual atom catalysts (DACs) have emerged as one of the most promising catalytic materials for LSB by expediting the kinetic conversion of LiPSs and facilitate the formation/decomposition of Li 2 S during the battery cycling process, thereby reducing the migration of LiPSs. In this study, we developed Fe-Ni DACs supported on nitrogen-doped few-layer graphene (FeNi-N-G) as a host for sulfur cathode. Both theoretical calculations and experimental results demonstrate that this few-layer graphene structure provides high conductivity and a porous framework, which significantly improves electron and lithium-ion transport. The dual-functional Fe-Ni–N site serve as strong anchoring centers for polysulfides while simultaneously providing active sites to improve the Li–S redox kinetics. Consequently, the cathode achieves a high initial capacity of 1164.6 mAh g −1 and maintains a capacity retention of 83.1% after 100 cycles at 0.2 C. Such performance underscores its exceptional cycling durability, particularly under high sulfur loading conditions.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 22
·1771
·
IF 3.2
Zhang Enlei,Xu Zhiyi,Song Xiaowen,Wang Shuyuan,Zhang Bengui,Xie Yingpeng,Wang Guosheng
Hydrogen peroxide (H 2 O 2 ) detection is of great significance in environmental monitoring, food safety, and clinical diagnosis. Copper doping into α-FeOOH nanorods significantly enhanced the sensitivity and stability for electrochemical detection of H 2 O 2 . The structure and surface morphology of the products were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The electrochemical properties of CuFe 2 O 4 /α-FeOOH were studied by cyclic voltammetry and amperometry. The results showed that the composition and morphology of the as-prepared products were dependent on the Cu doping level. When the Cu doping level was up to 10 mol%, a spinel copper ferrite (CuFe 2 O 4 ) phase was formed in the product, accompanied by a morphological evolution into nanoparticles. The CuFe 2 O 4 /α-FeOOH/FTO (Fluorine-doped tin oxide) electrode exhibited excellent performance to detection of H 2 O 2 with high sensitivity (125.86 μA·mM −1 ·cm −2 ) and a low detection limit (0.56 μM, S/N = 3). Finally, the possible mechanism of the CuFe 2 O 4 /α-FeOOH catalysts for H 2 O 2 detection was analyzed and discussed.
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高影响因子
Water
·
2026
·Vol. 18
·期 16
·1928
·
IF 3.5
Yixin Pan,Yajun Chen,Wenshuo Zhang,Xiaofan Lv
A nitrogen-doped carbon-confined cobalt–iron bimetallic catalyst (CFNC) was fabricated through high-temperature pyrolysis of a ZIF-67-modified CoFe2O4precursor and employed as a heterogeneous activator for peroxymonosulfate (PMS)-mediated Rhodamine B (RhB) degradation. The physicochemical properties of the as-prepared catalyst were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET) analysis. These analyses demonstrated that Co–Fe bimetallic species were successfully embedded within the nitrogen-doped carbon framework, forming a confined carbon-supported catalytic structure. Under optimized conditions (CFNC dosage of 20 mg L−1, PMS concentration of 150 mg L−1, and initial pH of 7), the CFNC/PMS system achieved 99.45% RhB removal within 10 min. Moreover, the catalyst retained 78.91% degradation efficiency after five successive cycles, indicating its satisfactory reusability and structural stability. Mechanistic investigations based on radical scavenging experiments and electron paramagnetic resonance (EPR) analysis revealed that PMS activation over CFNC involved the coexistence of radical and non-radical oxidation pathways, in which singlet oxygen (1O2) played a predominant role. The defect-rich nitrogen-doped carbon matrix facilitated PMS adsorption and activation, promoting the selective formation of1O2, while the confined Co–Fe bimetallic sites contributed to efficient electron transfer during the catalytic process. The synergistic coupling between the Co–Fe active centers and conductive carbon framework accounted for the enhanced catalytic performance, suppressed metal leaching, and long-term stability of CFNC. This work presents a promising approach for constructing robust bimetallic carbon-based catalysts and advances the application of PMS-driven advanced oxidation processes for wastewater remediation.
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高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Xiang Zhang,Yingjie Song,Xiang Xiong,Zhaoyang Li,Weiming Yang,Haishun Liu
Removing azo dyes from effluents poses an environmental and socio-economic challenge due to their carcinogenic and mutagenic risks. The Fenton-like reaction using Fe-based metallic glass (MG) is feasible for wastewater remediation; however, the oxidation-induced passive film will impede the further reaction of Fe-based catalysts, especially for Fe-based MG recycled from end-of-life soft magnetic products. Here, the oxidation behavior of Fe 73.5 Si 13.5 B 9 Cu 1 Nb 3 MG ribbons and the consequential effect on the degradation performance of acid orange 7 have been systematically investigated. When the Fe-based MG is oxidized at low temperatures (<520 °C), a continuous and dense oxide layer forms, shielding the zero-valence iron (ZVI) from interacting with dye molecules. As the oxidation temperature rises to 580–680 °C, numerous α-Fe(Si) nanocrystals and CuO nuclei will appear and degrade the protective oxide film during the rapid high-temperature oxidation (RHTO), enhancing the azo dye decolorization rate. Further oxidation at higher temperatures (>700 °C) will increase the oxide layer thickness and consume ZVI, thereby blocking the Fenton-like reactions. Notably, the RHTO could reactivate the inactivated Fe-based MG and endow the inactivated MG with a high dye degradation constant k of 1.5 min −1 , indicating a promising method for reusing the end-of-life Fe-based MG electronic products for textile dye wastewater treatment.
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高影响因子
Water
·
2025
·Vol. 17
·期 11
·1700
·
IF 3
Xiaoni Lin,Qiang Ge,Xianbo Zhou,Yan Wang,Congyun Zhu,Kuanyong Liu,Jinquan Wan
Bimetallic catalysts can effectively enhance the catalytic degradation efficiency of peroxymonosulfate (PMS), which is usually attributed to the enhancement of electron transfer, but currently, there is no clear explanation of the mechanism of how the electron transfer is enhanced. A nitrogen-doped Fe/Mn composite biochar (FeMn-NBC) was co-constructed by hydrothermal synthesis and high-temperature calcination. The FeMn-NBC activated PMS more efficiently than the monometallic one due to the enhanced electron transfer between Fe and Mn. The FeMn-NBC/PMS system activated PMS with Mn as the active center, and the high oxidation state of Mn4+promoted the acceleration of the PMS adsorption of the generation of Mn2+/Mn3+. This gaining effect accelerated the electron cycling between Fe2+/Fe3+and Mn2+/Mn3+/Mn4+, which enhanced the PMS catalysis to generate free radicals (•OH, SO4•−and •O2−) and non-radicals (1O2) for the efficient degradation of diisobutyl phthalate (DIBP). Benefiting from this gaining effect, the degradation rate of DIBP by the FeMn-NBC/PMS system was increased by 2.43 and 3.38 times compared to Fe-NBC and Mn-NBC. The bimetallic-enhanced electron transfer mechanism proposed in this study facilitated the development of efficient catalysts for more efficient and selective removal of organic pollutants.
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高影响因子
CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Dan Zhao,Wenjie Jiang,Wang Zhang,Chenhao Zhang,Wenjun Zhao,Zhizhou Chen,Yanan Liu,Jiajie Xu
Antibiotic overuse has led to drug-resistant bacteria and superbugs, necessitating urgent strategies. MOFs, although they are potential antimicrobial carriers, have limitations at low doses and in single therapy. Here, by adding different amounts of CTAB in the precursor solution, two different morphologies of NH2-MIL-101(Fe)@Ag nanoagents were obtained, namely, NH2-MIL-101(Fe)@Ag-1 (Cube) and NH2-MIL-101(Fe)@Ag-2 (Octahedron). Antibacterial experiments showed that these two nano reagents with both photothermal and photodynamic effects exhibited nearly 100% bactericidal rate against high concentrations of Staphylococcus aureus and Escherichia coli (107 CFU/mL) within 15 min. The combination of inactivation of intracellular proteins and disruption of cell membranes induced by Ag ions and high temperature resulted in NH2-MIL-101(Fe)@Ag 100% in an octahedron showing durable and superior bactericidal performance at low doses (64 μg/mL), which is much better than other antibacterial reagents. Furthermore, the enhanced mechanism was discussed in detail by DFT calculations. A special electron transfer process occurred between Ag and NH2-MIL-101 (Fe) under 880 nm NIR irradiation, which promoted the generation of ROS and enhanced the antibacterial effect. In addition, these two nano reagents have good therapeutic effects on wound healing in vivo due to silver ions and photothermal effects.
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高影响因子
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