APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Die Yuan,Kai Li,Xuebin Lu,Chaoqin Zhao,Guijian Zhang,Ping Ning,Dongdong Zhang,Xin Sun,Shuangyou Bao,Chi Wang
A dual-channel electron-donation pathway enables reductant-free Fe 2+ /Co 2+ regeneration. • Pollutants and S 2- synergistically drive reversible M(III)/M(II) redox cycling. • Co 9 S 8 /FeS/PMS achieves rapid and complete levofloxacin degradation within 10 min. A magnetic Co 9 S 8 /FeS composite derived from cobalt slag was developed for reductant-free PMS activation through a novel dual-channel electron-donation pathway involving S 2- species and levofloxacin (LEV). The catalytic performance and mechanism were investigated through degradation kinetics, reactive-species identification, X-ray absorption fine spectroscopy (XAFS), X-ray photoelectron spectroscopy (XPS) analyses, density functional theory (DFT) and life cycle assessment. The Co 9 S 8 /FeS/PMS system completely degraded LEV within 10 min (k = 0.4498 min −1 ), maintained efficient removal over pH 3.0–11.0 and after five cycles (>95%), with 1 O 2 as the dominant reactive species. DFT calculations, together with XAFS/XPS analyses, revealed that S 2− and LEV serve as dual electron donors to facilitate Fe 3+ /Co 3+ reduction, achieving nearly complete Fe/Co redox cycling and sustained PMS activation. Compared with conventional single-electron-donor Fenton-like systems, this strategy eliminates the need for external reductants and substantially reduces environmental impacts, offering a sustainable route for converting cobalt slag into recyclable catalysts for antibiotic wastewater treatment. Download: Download high-res image (176KB) Download: Download full-size image
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高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Tingting Wei,Jiemin Dong,Xu Cheng,Yanhua Zhang,Jiaxin Zhang,Ming Liang,Jianfeng Li,Ting-Feng Yi
The Fe–Cu–Mn based layered oxides have gained considerable attention as particularly promising cathode materials for sodium-ion batteries (SIBs) due to their low cost, earth abundance, and favorable electrochemical properties. However, current research often treats this system as a unified matrix, which obscures the specific contributions of the individual Fe, Cu, and Mn components in determining structural stability and electrochemical performance. Herein, we systematically investigate the ternary Fe–Cu–Mn system without the addition of extraneous elements. By precisely tuning the stoichiometric ratios of Fe, Cu, and Mn within a Mn-rich layered framework, a direct correlation is established between composition, structure, and electrochemical behavior. It reveals that optimizing the Fe/Cu/Mn ratio effectively suppresses undesirable phase transitions, enhances structural stability, and results in superior electrochemical performance. The Na 0.70 Fe 0.15 Cu 0.15 Mn 0.70 O 2 (NFCM-0.70) cathode delivers a high initial energy density of 293.87 Wh kg −1 (based on the mass of the cathode) and presents the excellent capacity retention of 82.9% after 100 cycles at 0.2C. This work underscores the importance of rationally controlling intrinsic component ratios as a strategy for developing low-cost, high-performance layered oxide cathodes for SIBs.
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Bioresource Technology Reports
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2026
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IF 5
Chao Li,Tangtang Xie,Junfeng Lin,Chengfa Li,Dengyun Cao,Guangming Du,Xintai Su
Composted pig manure (CPM) contains abundant organic matter; however, its complex matrix tends to undergo competitive carbonization during pyrolysis, limiting humification efficiency. In this study, a two-step process combining Fe-assisted low-temperature pyrolysis with alkaline extraction was developed to convert CPM into potassium humate (HA-K). Under optimized conditions (225 °C, 120 min, 5 wt% KOH), the HA-K yield increased from 49.07% to 78.14% with the addition of 1.5 wt% Fe, indicating a substantial enhancement in conversion efficiency. Fe incorporation promoted oxygen functionalization, aromatic condensation, and molecular reorganization, resulting in more humified structures approaching natural humic substances. Mechanistically, Fe facilitated the redistribution of reactive intermediates during pyrolysis, favoring the formation of nitrogen-containing heterocycles and stable aromatic frameworks. Correspondingly, the obtained humic substances exhibited enhanced bioactivity, significantly promoting wheat growth. At the optimal concentration (100 mg/L), shoot and root lengths increased by 8.15% and 54.78%, respectively, accompanied by increased biomass accumulation and protein content. This work provides new insight into Fe-driven thermochemical humification and offers a scalable route for the high-value utilization of livestock waste.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Lingzhen Miao,Siqi Luo,Ziru Liang,Ming Lu,Pengcheng Wang
The treatment of wastewater laden with energetic compounds, particularly 2,2′,4,4′,6,6′-hexanitrostilbene (HNS), remains highly challenging owing to the environmental persistence and inherent toxicity of nitroaromatic derivatives. Herein, we reported a CoFe 2 O 4 /PMS system for the first-time efficient degradation of HNS. The CoFe 2 O 4 /PMS process afforded 96.3% removal of HNS within 150 min, together with 89.3% chemical oxygen demand (COD) removal and 49.5% total organic carbon (TOC) removal, indicating substantial deep oxidation and partial mineralization. Mechanistic studies combining quenching experiments, EPR spectroscopy, electrochemical analysis, and DFT calculations disclosed a synergistic radical/non-radical pathway dominated by 1 O 2 , with Fe incorporation enhancing PMS adsorption, charge transfer, and catalytic activation. HPLC-MS revealed degradation intermediates and supported three plausible degradation pathways, whereas QSAR analysis indicated progressive detoxification during oxidation. The catalyst further exhibited excellent stability, negligible metal leaching, and broad applicability toward actual HNS production wastewater and other energetic organic pollutants. These findings identify CoFe 2 O 4 /PMS as a promising platform for the efficient remediation of hazardous energetic compound wastewater.
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JOURNAL OF FLUORESCENCE
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2026
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IF 3.4
Hou Huijing,Luo Mingming,Li Fang,Tan Yijun,Liu Ruowei,Xu Longping,Feng Yanwen,Guo Xiangli,Wu Zijian
Kanamycin (KANA) is a veterinary drug residue that is highly scrutinized in food safety testing. In this study, a metal-organic framework-based aptamer-nanoenzyme (NH 2 -MIL-88B(Fe)/CDs-Apt) was introduced for the dual-mode detection of KANA. NH 2 -MIL-88B(Fe) catalyzes the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) by H₂O₂ to form blue ox-TMB, thereby enabling colorimetric detection. As a fluorescence quencher, NH 2 -MIL-88B(Fe) quenches the fluorescence of CDs via photogenerated electron transfer (PET) or fluorescence resonance energy transfer (FRET) mechanisms. The detection limits were 0.716 fM (fluorescent) and 0.709 fM (colorimetric), respectively. The proposed aptasensor was successfully applied to the detection of KANA in eggs, honey, and lake water. This aptasensor demonstrates high sensitivity and accuracy, as well as broad application potential.
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高影响因子
ACS Applied Engineering Materials
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2026
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IF 3.5
Yang Tianyu,Pan Yuwen,Yang Yufang,Zhou Huiya,Ren Heran,Zhang Shuangshuang,Zhao Rongda,Wu Fufa,Miao Lihua
Against the background of carbon peaking and carbon neutrality goals, green hydrogen has become a clean and efficient energy carrier and a core driving force for energy transition. Water electrolysis accounts for 90% of green hydrogen production and serves as the key route for green hydrogen preparation. However, performance bottlenecks of conventional catalysts severely restrict the large-scale application of green hydrogen. High-entropy alloys, with their unique cocktail effect and lattice distortion, offer an approach to overcome this challenge and have emerged as a critical breakthrough in the green hydrogen field. This work systematically investigated the effect of vanadium content on the electrocatalytic performance of Fe 40− x (CoCrNiMn) 60 V x high-entropy alloys, focusing on the optimization of hydrogen evolution reaction (HER) activity, and aimed to develop non-noble metal bifunctional electrocatalysts suitable for both freshwater and seawater working conditions. The results showed that the Fe 39 (CoCrNiMn) 60 V 1 alloy exhibited excellent HER performance within the same system in 1 M KOH electrolyte at a current density of −10 mA cm −2 , with an HER overpotential of only 98.3 mV, which was superior to that of most non-noble metal catalysts. This alloy also delivered favorable oxygen evolution reaction (OER) activity with an OER overpotential of 291.7 mV, and no obvious performance decay occurred after a 30 h stability test. In alkaline seawater electrolyte, the alloy maintained stable HER activity, with the HER overpotential slightly increasing to 106.2 mV at an equivalent current density, and the OER overpotential reached 350 mV. In overall water splitting tests, the Fe 39 (CoCrNiMn) 60 V 1 alloy retained outstanding performance after 100 h of testing in both alkaline freshwater and alkaline seawater electrolytes, which fully demonstrated its great potential to replace noble metal catalysts and realize efficient hydrogen production from seawater. This work not only provided insights into the design of high-entropy alloy electrocatalysts but also was of great significance for enhancing HER performance, promoting large-scale green hydrogen production, and achieving efficient utilization of seawater resources.
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Journal of Water Process Engineering
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2026
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IF 6.6
Lixun Fan,Yonggang Zhao,Mingli Ye,Hongyun Niu,Yaqi Cai
NH₂-MIL(Fe) is grafted onto amino-functionalized NH₂-PS resin to gain micro-nanoscale adsorbent. • SMX adsorption is favorable at pH 5.2–8.0 with an adsorption capacity of 250.61 mg·g −1 . • Hydrogen bonding and electrostatic attraction are the driving forces for SMX adsorption. • The Fe(III) centers in MOF endow NH₂-PS@NH₂-MIL(Fe) Fenton-like catalytic activity. Sulfonamide antibiotics (SAs) are ubiquitous in the aquatic environment and difficult to remove using conventional wastewater treatment processes. Adsorption and Fenton-like oxidation are efficient techniques for the elimination of SAs from water. In this study, a novel hierarchical micro-nano structural adsorbent was synthesized by grafting Fe-based MOFs (NH 2 -MIL(Fe)) onto amino-functionalized polystyrene-divinylbenzene resin (NH 2 -PS). The physicochemical properties and structural features of the composite (NH 2 -PS@NH 2 -MIL(Fe)) were systematically characterized by SEM, EDS, XRD, FTIR, BET and XPS, confirming the successful immobilization of NH 2 -MIL(Fe) on the PS surface and the presence of abundant active sites. The adsorption behavior of sulfamethoxazole (SMX) on NH 2 -PS@NH 2 -MIL(Fe) was evaluated under various conditions, including pH, adsorbent dosage, and coexisting anions. The adsorption process followed the pseudo-second-order kinetic model and Langmuir isotherm model, indicating a monolayer sorption with a maximum capacity of 250.6 mg·g −1 at pH 5.2 and thermodynamic analyses revealed that the adsorption was spontaneous and exothermic. Based on FTIR, XRD and XPS analyses, electrostatic attraction, hydrogen bonding, π–π stacking, and metal–ligand coordination/Lewis acid-base interaction collectively governed the adsorption of SMX. Furthermore, the Fe(III) centers endowed NH 2 -PS@NH 2 -MIL(Fe) Fenton-like catalytic activity. With the addition of H 2 O 2 , over 95% of SMX was eliminated rapidly from water in a wide pH range. Based on the dual functions, this material can efficiently remove SMX from surface water samples. These results highlight the great potential of NH 2 -PS@NH 2 -MIL(Fe) for efficient removal of sulfonamide antibiotics. Download: Download high-res image (319KB) Download: Download full-size image
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122734
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IF 7.5
Zhenda Liang,Jiangpeng Li,Jian Liu,Yijun Pang,Li Zhou,Bing Yan
Cephalosporins are widely used β -lactam antibiotics frequently detected in aquatic environments, posing risks to ecosystem health and contribute to the dissemination of antibiotic resistance. Manganese dioxide (MnO 2 ) has attracted considerable attention as a low-cost oxidant for cephalosporin degradation. However, its performance is severely limited under neutral and alkaline conditions. Here, we demonstrate that defect-rich ε -MnO 2 achieved over 60% removal of eight representative cephalosporins at pH 7.0 through the combined contributions of Mn redox reactions and oxygen-vacancy-mediated reactive oxygen species (ROS) pathways. Fe doping further increased surface oxygen-vacancy density and catalytic activity, producing Fe- ε -MnO 2 with boosted degradation performance across a broad pH range (3.0–11.0). Using ceftriaxone as a model compound, mechanistic investigations revealed that singlet oxygen ( 1 O 2 ) dominated under neutral conditions, whereas hydroxyl radicals (•OH) became increasingly important under alkaline conditions, compensating for reduced lattice-mediated oxidation and partially suppressed 1 O 2 production. To facilitate catalyst recovery and practical application, Fe- ε -MnO 2 was immobilized in situ onto a commercial melamine sponge, forming a stable composite with effective performance in diverse real water matrices. Toxicity assays confirmed substantial detoxification of ceftriaxone after treatment. Overall, this study demonstrates that defect-rich MnO 2 combined with Fe doping provides an effective strategy for enhancing antibiotic degradation and expanding catalytic activity across a wide pH range.
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JOURNAL OF HAZARDOUS MATERIALS
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2026
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IF 10.6
Fen Liu,Wei Xiang,Chen Wang,Yongchun Zhao,Tao Zhou,Mingjie Huang,Xiaohui Wu
High-concentration glyphosate (Gly) wastewater presents a formidable remediation challenge due to its recalcitrance and the inherent risk of generating toxic intermediates like aminomethylphosphonic acid (AMPA). Herein, we report a facile “waste-treats-waste” strategy utilizing a self-accelerated Fe(II)/O 2 system that operates efficiently under neutral pH, effectively circumventing the acidic constraints of traditional Fenton processes. This system achieved a 57% Gly removal efficiency (initial concentration 0.5 g/L) within 60 min, with a kinetic rate constant ( k obs = 0.029 min −1 ) significantly outperforming conventional oxidation technologies. Mechanistic investigations reveal that Gly acts as a suicide ligand, forming an inner-sphere Fe(II)-Gly complex that lowers the Gibbs free energy barrier, thereby rendering O 2 activation thermodynamically favorable. The degradation proceeds via a dual-pathway mechanism, synergizing hydroxyl radical (•OH) attack (∼40%) with a dominant intramolecular ligand-to-metal charge transfer (LMCT) process (∼60%). Crucially, density functional theory (DFT) calculations elucidate that Fe(III) coordination induces a regioselective weakening of the C–N bond adjacent to the phosphonate group. This steric and electronic modulation steers the reaction pathway toward the preferential formation of benign glycine, successfully suppressing the generation of highly toxic AMPA. Bioassays using Tetrahymena thermophila confirmed that this glycine-selective pathway optimization significantly mitigates the acute toxicity of the effluent, validating the system as a sustainable and eco-safe solution for herbicide wastewater treatment.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Huiwen Tang,Jinquan Wan,Yan Wang
This study proposes a strategy for constructing catalysts based on carbon nanotube (CNT)-regulated pore structures. By coating CNTs onto the outer surface of a metal-organic framework, a series of composite catalysts (PCC-x) were successfully prepared. The introduction of CNTs not only optimized the pore environment of the catalyst, but also established continuous electron-transfer pathways, thereby promoting interfacial charge transfer and peroxymonosulfate (PMS) activation. Under the conditions of 0.6 g/L catalyst, 2 mmol/L PMS, and 10 mg/L 2,4,6-trichlorophenol (2,4,6-TCP), PCC-5 exhibited the best catalytic performance, achieving a removal efficiency of 95.1% for 2,4,6-TCP. The corresponding apparent rate constant is 1.75 times higher than that of the non-composite catalyst (NPC). Electrochemical impedance spectroscopy showed that the charge-transfer resistance of PCC-5 was 418.8 Ω, which was 17.2% lower than that of NPC (506.0 Ω), confirming that CNT incorporation effectively promoted interfacial electron transfer and thereby enhanced the catalytic performance. This study provides a new strategy for designing CNT-modified catalysts for the efficient and stable removal of phenolic pollutants.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Zhihui Zhao,Qian Bai,Juanjuan Qi,Hao Han,Junhai Chen,Suiyi Song,Xudong Yang,Qiangwei Li,Jianhui Wang,Lidong Wang
Overcoming the symmetric electronic structure of single-atom catalysts (SACs) to promote the cleavage of O-O bond remains critical for efficient H 2 O 2 activation. Herein, the high-loading Fe SACs (FeN 1 C 2 /C 2 N, 7.2 wt%) is designed via in-situ carbon defect engineering, which breaks the symmetric electronic structure through the nonplanar asymmetric coordination of Fe. DFT calculations and characterizations reveal that compared to the planar symmetric Fe-N 2 structure, N 1 -Fe-C 2 coordination modifies d-p orbital hybridization, inducing the spin state of Fe from low-spin (LS, t 2g : ↑↓ , ↑↓ , ↑↓ ; e g : _, _, _) to high-spin (HS, t 2g : ↑↓ , ↑ , ↑ ; e g : ↑ , ↑ ; _). The HS state weakens the coupling between *H 2 O 2 and Fe 3 d orbitals, promoting H 2 O 2 decomposition into abundant •OH, further achieving electron-rich pollutant Sulfamerazine (SMR) degradation with the rate constant of k obs =0.3308 min -1 . Additionally, such nonplanar asymmetric coordination releases the N atoms adjacent to the Fe sites, allowing them to form electron-transfer channel with SMR, which establishes nonradical electron transfer pathway (ETP). Pollutant pre-adsorption enables •OH to attack the target in situ along an ultrashort pathway, resulting in an efficient ETP-assisted radical oxidation mechanism. Overall, this work provides new insights into SACs design and a novel perspective for Fenton-like systems application.
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高影响因子
Environmental Science-Nano
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2026
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IF 5.6
Mengru Shan,Yufeng Zhang,Haobin Jin,Siyu Luo,Yanqing Cong,Shiwen Lv,Jing Xu,Yi Zhang
In this work, ZIF-67/Fe nanozymes with specific binding sites toward tetracycline antibiotics (TCs) were synthesized via a one-step method, taking advantage of the strong interaction between Fe and oxygen-containing functional groups in TCs. Taking advantage of the specific enhancement effect of TCs on the peroxidase-like activity of ZIF-67/Fe, a high-performance colorimetric sensor array was constructed. This array could successfully discriminate four types of TCs, namely oxytetracycline, tetracycline, doxycycline, and doxycycline hydrochloride. It exhibited a linear detection range of 50–1000 μg L−1 for all four antibiotics, with limits of detection (LOD) as low as 17.78, 19.71, 33.39, and 38.05 μg L−1, respectively. Density functional theory (DFT) calculations revealed that Fe doping significantly enhanced the peroxidase-like activity of the nanozyme by facilitating electron transfer between the nanozyme and TCs. Furthermore, the ZIF-67/Fe nanozyme could effectively achieve TC removal after the detection process, and it still maintained the capability to accurately distinguish tetracycline antibiotics in real water samples. The one-step preparation strategy proposed in this study simplifies the synthesis process of MOF-based nanozymes. The constructed sensor array breaks through the technical bottleneck that traditional methods find it difficult to distinguish antibiotics of the same category. With the dual functions of high-sensitivity detection and pollutant removal, it provides a new idea for the accurate monitoring and control of TCs in aquatic environments.
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