Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 1
·121114
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IF 7.2
Qing Wang,Lin Deng,Changbo Zhang,Rajendra Prasad Singh,Gongde Wu
Para-nitrophenol (PNP), a highly toxic compound widely detected in water bodies, was investigated as the target contaminant during the UV/chlor(am)ine/Fe(III) processes to evaluate its degradation kinetics model, and disinfection byproducts (DBPs) formation and pathways. The incorporation of Fe(III) introduced a oxidation-reduction cycle of Fe(II) and Fe(III), which can generate additional hydroxyl radicals, reactive chlorine species, and reactive nitrogen species, thereby accelerating PNP degradation by 21.85 % in the UV/chlorine system and 31.08 % in the UV/chloramine system. PNP degradation followed pseudo-first-order kinetics, with observed rate constants ( k obs ) calculated as 0.0938 and 0.0604 min −1 , in the UV/chlorine/Fe(III) and UV/chloramine/Fe(III) systems, respectively. Radical quenching experiments confirmed the dominant reactive species in each system, supporting the mechanistic interpretation. In the UV/chlorine/Fe(III) system, DBP yields ranked as follows: Halonitromethanes (HNMs) > trihalomethanes (THMs) > haloacetamides (HAcAms) > haloacetonitriles (HANs), while the order was HNMs > THMs > HANs > HAcAms, in the UV/chloramine/Fe(III) system. Factors influencing DBP formation, including Fe(III) dosage, initial pH, and chlor(am)ine dosage, were systematically investigated. The cytotoxicity index (CTI) contributions of each DBP in the UV/chlor(am)ine/Fe(III) systems were ranked as follows: HNMs > HANs > THMs > HAcAms. Based on detected transformation products (TPs) and radical contribution analysis, plausible pathways for PNP transformation and DBPs formation were proposed. These findings provide valuable insights into PNP degradation behavior and the mechanisms of DBPs formation in the UV/chlor(am)ine/Fe(III) systems, supporting their future practical applications.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122324
·
IF 7.5
Ze Liu,Peng Liao,Ao Qian,Zheng Wang,Bowen Yang,Jian Wang,Na Zhang,Shiwei Xie
The efficient decontamination and resource recovery of organophosphonate-laden wastewater remain a critical environmental challenge. In this study, a sequential “electrocoagulation-oxidation” coupled process integrating iron electrocoagulation (EC) with peroxymonosulfate (PMS) activation was developed for the degradation of nitrilotris(methylene phosphonic acid) (NTMP). The initial EC stage achieved near-complete (∼100% within 20 min) NTMP removal via adsorption, and subsequent PMS oxidation of the iron precipitates under optimal conditions (50 mA, Fe:PMS molar ratio of 3:1 transformed 53.20% of the adsorbed NTMP into orthophosphate. Notably, the sequential post-addition of PMS yielded significantly superior mineralization efficiency compared to the pre-addition strategy. Advanced solid-phase characterizations revealed that the activation mechanism is driven by in-situ generated structural Fe(II), predominantly hosted within magnetite formed under neutral initial pH. Mechanistic investigations using radical quenching and electron paramagnetic resonance (EPR) spectroscopy identified sulfate radicals (SO 4 • - ) as the dominant reactive species, with a minor contribution from Fe(IV). The oxidation proceeded primarily via surface-mediated C-P bond cleavage, resulting in the in-situ immobilization of the released orthophosphate on the iron mineral matrix. Crucially, phytotoxicity assays using perennial ryegrass confirmed that this oxidative treatment significantly reduced the ecotoxicity of the precipitates and converted the pollutants into a bioavailable phosphorus source. This work establishes the sequential EC-PMS process as a promising, sustainable strategy for the simultaneous decontamination of phosphonates and the recovery of phosphorus resources.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Wei Jiang,Yajun Li,Hongcheng Li,Yuhao Fu,Yi Li,Jian Ren,Qian Li,Limei Pan,Jian Yang
In this work, a unique three-dimensional (3D) network NiFeCoP@Ti₃C₂Tₓ composite, consisting of Co, Fe co-doped Ni 2 P (NiFeCoP) nanosheets anchored on Ti₃C₂Tₓ nanosheets via heterojunction, was situ constructed by phosphidizing the NiFeCo-LDH@Ti₃C₂Tₓ precursor. The 3D network structure establishes a 3D conductive network while generating a built-in electric field at the heterointerface, which efficiently accelerates electron/ion transport and simultaneously improves the structure stability of the electrode. DFT calculations demonstrate that Co doping further optimizes the electronic structure of NiFeCoP, introduces additional active sites, thereby promoting electrochemical reaction kinetics. Meanwhile, the synergistic effect among Ni, Fe, and Co with different redox potentials effectively buffers the volume changes during charge/discharge processes. Consequently, NiFeCoP@Ti₃C₂Tₓ as lithium ion batteries (LIBs) anode shows outstanding electrochemical performance at different current density (950 mAh/g after 340 cycles at 0.5 A/g, 816 mAh/g after 900 cycles at 1 A/g, 541 mAh/g after 1000 cycles at 2 A/g).
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Hao Pu,Weiqing He,Chun Yan,Yingdan Zhu,Lingyu Yue,Haibing Xu,Gang Chen,Xiaochen Yu
The interfacial bonding performance between carbon fibers and the resin matrix is a critical factor limiting the performance optimization of carbon fiber reinforced polymer composites. This work utilizes Fe 3+ as the iron source and fumaric acid as the organic ligand to construct the precursor of iron-based metal–organic framework (MIL-88-A) through in situ growth on carbon fiber surfaces. Subsequently, the grafting of magnetic Fe 3 O 4 nanoparticles onto carbon fiber surfaces was accomplished via a pyrolytic treatment. These modified carbon fiber reinforced epoxy composites were then fabricated using vacuum-assisted resin infusion (VARI). The results indicate that the interfacial shear strength (IFSS) and interlaminar shear strength (ILSS) of the Fe 3 O 4 nanoparticle-modified CF/EP composites reached 106.4 MPa and 68.8 MPa, respectively, representing significant improvements of 63.7% and 48.9% compared to those of the desized carbon fiber composites. This enhancement can be attributed to the fact that the magnetic Fe 3 O 4 nanoparticles not only improved the wettability between the carbon fiber surface and the epoxy resin but also increased the surface roughness of the fibers, thereby enhancing mechanical interlocking and stress transfer efficiency in the interfacial region. Meanwhile, owing to the presence of magnetic Fe 3 O 4 nanoparticles, the CF/EP composites exhibit outstanding electromagnetic shielding performance with an average shielding effectiveness of 47.1 dB in the X-band. This study offers new design insights for improving the interfacial properties of carbon fiber-reinforced polymer (CFRP) composites and expanding their multifunctional applications.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Junsheng Liu,Derun Guo,Minghui Zhu,Zixu Yang,Yi-Fan Han
Catalytic cracking of naphtha is a pivotal route for light olefin production, yet the rapid deactivation of ZSM-5 zeolites due to coking remains a critical bottleneck. While Fe modification is known to modulate acidity, its specific impact on the reaction kinetic network and the interplay with zeolite topology remain underexplored. Herein, we synthesized Fe-incorporated microporous (CZ) and hierarchical (NC) ZSM-5 zeolites to decouple the effects of framework integrity and mesoporosity. Counterintuitively, the microporous CZ series significantly outperformed the hierarchical NC series, revealing that preserving framework integrity is more critical for Fe efficacy than introducing mesopores, which compromised crystallinity during synthesis. The optimal Fe0.66-CZ catalyst demonstrated superior stability, reducing coke deposition by 74% (2.11% vs 8.05%) and enhancing butene selectivity compared to the parent ZSM-5. Crucially, kinetic modeling elucidates the origin of this coke resistance: although Fe species slightly lowered the barrier for initial oligomerization, they drastically reduced the activation energy for the secondary cracking of heavy intermediates (C7→C2–5) from 69.77 to 50.00 kJ/mol. This kinetic preference facilitates the rapid recracking of coke precursors back into light olefins before they evolve into graphitic deposits. This work provides a new kinetic perspective on designing long-life catalysts by tuning the precursor consumption rate.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2026
·Vol. 132
·期 3
·226
·
IF 3
Hong Khanh Trung,Dang Huu Phuc,Le Hanh Ngoc Thi,Dieu Nguyen,Duyen Ky,Nguyen Quoc Thang,Nguyen Van Cuong
This study introduces a rapid synthesis method for nitrogen-doped carbon quantum dots (N-CQDs) using microwave irradiation, with citric acid and urea serving as the carbon and nitrogen sources, respectively. The material was characterized by Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), ultraviolet-visible (UV-Vis) spectroscopy, and fluorescence spectroscopy, revealing a uniform structure, nanoscale size (4–10 nm), and excellent optical properties. N-CQDs were used as fluorescent sensors to detect Fe³⁺ ions and oxytetracycline (OTC) with high sensitivity and selectivity. The results demonstrated limits of detection (LOD) of 1.685 µM and 0.638 µM for Fe³⁺ and OTC, respectively, within linear ranges of 1–32 µM and 0.2–100 µM, respectively. The fluorescence quenching mechanism for Fe³⁺ was attributed to static quenching, whereas OTC enhanced the fluorescence via hydrogen bonding and π–π interactions. The analytical performance of the N-CQDs surpassed that of many previously reported methods, highlighting their potential for environmental sensing and antibiotic residue monitoring.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Haibing Ye,Canhui Zhang,Zitian Zhao,Magdi E.A. Zaki,Boyuan Gao,Arafat Toghan,Minghua Huang
A ternary–atom Ni DA /Fe SA OER catalyst with Ni 2 N 6 and FeN 4 sites is constructed. • Fe auxiliary sites induce spin polarization and tune the d-band center of Ni 2 N 6 sites. • Ni DA /Fe SA –N–HCB shows a low OER overpotential of 230 mV at 10 mA cm −2 . • Aqueous and solid–state Zn–air batteries exhibit long-term cycling stability up to 700 h and 200 h respectively. Air–breathing energy conversion systems, particularly rechargeable zinc–air batteries (RZABs), are among the most promising high–efficiency energy storage technologies, whose long–term charge–discharge performance is critically governed by the sluggish cathodic oxygen evolution reaction (OER). Nitrogen–doped carbon–supported nickel–based dual–atom catalysts (Ni–DACs) have shown considerable potential for catalyzing this multi–proton–electron reaction, yet their activity is constrained by the difficulty of precisely tuning the electronic structure to balance the adsorption/desorption of key intermediates (*OH, *O, and *OOH). Herein, isolated Fe single–atoms are introduced as auxiliary centers to regulate adjacent Ni 2 dual–atom sites anchored on a nitrogen–doped hollow carbon bowl substrate (Ni DA /Fe SA –N–HCB), constructing a ternary–atom OER electrocatalyst with optimized electronic configuration. Multidimensional in situ spectroscopic characterizations combined with density functional theory calculations demonstrate that Fe incorporation induces electronic redistribution and spin polarization at Ni 2 sites, shifts the d–band center, and lowers the energy barrier of the rate–determining step by optimizing intermediate adsorption/desorption energetics. Consequently, Ni DA /Fe SA –N–HCB achieves an overpotential of 230 mV at 10 mA cm −2 . When applied as the air cathode catalyst, both aqueous and solid–state RZABs exhibit outstanding cycling stability of 700 and 200 h, respectively, with minimal charge–voltage decay of 0.01 and 0.02 V . This work provides an effective electronic structure engineering strategy for constructing durable and efficient OER catalysts toward practical zinc–air battery systems. This work presents an auxiliary–site engineering strategy that couples single–atom Fe sites with dual–atom Ni 2 centers to induce electron spin polarization and optimize the d–band center of the Ni₂ sites. Benefiting from this Fe–induced electronic structure modulation, the resulting ternary–atom catalyst delivers outstanding oxygen evolution activity and achieves long–term operational stability in both aqueous and solid–state rechargeable zinc–air batteries with negligible voltage decay. Download: Download high-res image (65KB) Download: Download full-size image
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·404
·
IF 38.5
Zhang Yifan,Kong Kexin,Jie Hongyuan,Jin Xiaoyan,Tian Long,Liu Yipu,Pan Zhijuan,Hwang Seong-Ju,Li Liang,Wang Zhe
Dual-atom catalysts (DACs) show great promise in catalyzing oxygen reduction/evolution reactions (ORR/OER), yet facing significant challenges in achieving simultaneous high catalytic activity and stability in zinc–air batteries (ZABs). In this study, we synthesized a porous three-dimensional carbon aerogel anchored with atomically isolated FeN4/NiN4 dual sites and Ru6 nanoclusters (FeN4–Ru6–NiN4@PCA) to address these challenges. The adjacent Ru6 nanoclusters effectively regulate the geometric structures of FeN4 and NiN4 sites and catalyze the formation of a highly graphitic carbon matrix. These structural features endow FeN4–Ru6–NiN4@PCA with remarkable ORR/OER activity and stability, outperforming counterparts with only FeN4/NiN4 dual species and benchmark Pt/C and RuO2 catalysts. Density functional theory calculations reveal that Ru6 clusters induce obvious electron redistribution of FeN4/NiN4 sites and optimize their electron transfer to the key oxygen intermediates (OH*) at the rate-determining steps, thereby accelerating the ORR and OER kinetics. When employed FeN4–Ru6–NiN4@PCA as the cathode catalyst in ZABs, the resulting ZAB delivers a peak power density of 197.76 mW cm–2 and demonstrates outstanding cycling stability over 2000 h, highlighting its great potential for use in applications of energy storage device.
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PubMed
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2026
·Vol. 101
·期 6
·1263-1272
·
IF 2.7
Zahid Iqbal,Jia-Yao Gao,Meng-Meng Wang,Wen-Fang Cai,Yun-Hai Wang
BACKGROUND The environmental persistence and resistance-promoting potential of tetracycline demands an efficient catalytic system capable of its complete oxidation. Herein, a bamboo derived Fe-N co-doped activated biochar (designated as Fe-N/C-A-2P) was engineered by two-step synthesis strategy to activate H 2 O 2 in a heterogeneous Fenton system for efficient tetracycline (TC) degradation. RESULTS The catalyst under optimized conditions (catalyst dosage = 0.5 g L −1 , pH = 3, H 2 O 2 concentration = 300 mg L −1 , temperature = 25 °C, and TC = 70 mg L −1 ) achieved about 90% TC removal within 60 min. It exhibited significantly enhanced reaction kinetics and sustained performance over multiple cycles with minimal iron leaching, indicating strong Fe retention and preserved stability. Radical quenching analysis confirmed a dual oxidative route, involving both radical (·OH and O 2 · − ) and non-radical ( 1 O 2 ) mechanism for TC degradation. The catalyst displayed strong resistance to common inorganic anions and humic substances, highlighting its applicability beyond idealized conditions. CONCLUSION These findings demonstrate that Fe-N/C-A-2P catalyst serves as an efficient heterogeneous Fenton catalyst for removal of TC, providing a feasible approach for mitigating antibiotic contamination in aqueous media. © 2026 Society of Chemical Industry (SCI).
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Qingmei Zhang,Yonghua Du,Zewei Cheng,Peng Gao,Qi Jin,Wei Wang,Bing Li
Dual-mode optical probes that are low-cost, sustainable, and stable over long periods are attractive for fieldable chemical and temperature readouts. We report a one-pot hydrothermal synthesis of nitrogen- and sulfur-codoped carbon dots (N, S-CDs) from fennel and garlic. The N, S-CDs exhibit green emission (λex/λem ≈ 459/525 nm) with a quantum yield of 9.98%. As a Fe³⁺ fluorescent probe, the material shows a linear response over 20–100 μM with a limit of detection of 0.37 μM (3σ/k). As a thermometric probe, the fluorescence intensity decreases linearly from 0–100 °C with a relative sensitivity of 0.58% °C⁻¹, accompanied by a progressive blue shift that enables intuitive colorimetric readout. After one year of ambient storage, the thermometric performance remains essentially unchanged (e.g., intensity variation at 0 °C ≤ ~4%), underscoring exceptional long-term stability. The combination of green synthesis, dual-function sensing (Fe³⁺ and temperature), and year-long durability positions these N, S-CDs as a practical platform for environmental monitoring and low-power visual thermometry.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·125033
·
IF 7.5
Rui Li,Xinyi Wang,Ying Gao,Yongchao Liu,Li Li,Shiliu Yang,Min Guo
Fe/Mg co-doped MoS 2 nanoflowers were prepared by a hydrothermal method. • Mg doping enlarged the MoS 2 interlayer spacing and enhanced piezo-response. • Mg enhanced H 2 O 2 adsorption on Fe sites and strengthened Fenton activity. • ·OH was confirmed as the dominant species for tetracycline degradation. • 5% Fe 3 Mg 1 -MoS 2 achieved 97.8% TC removal and 95.1% after six cycles. Pristine MoS 2 shows promise for piezo-Fenton degradation of organic pollutants, yet its weak piezoelectric response and sluggish surface reaction kinetics severely limit catalytic efficiency. Herein, Fe/Mg co-doped MoS 2 nanoflowers were prepared by a one-step hydrothermal method, and the Fe/Mg ratio was adjusted to construct a catalyst with both piezoelectric response and Fenton activity. Among the samples, 5% Fe 3 Mg 1 -MoS 2 exhibited the best performance. Under ultrasound alone, it degraded 71.9% of tetracycline within 60 min, with an apparent rate constant of 0.0213 min −1 . In the ultrasound/H 2 O 2 system, the degradation efficiency increased to 97.8%, and the rate constant reached 0.0620 min −1 , about 4.0 times that of p-MoS 2 . Structural and surface chemical analyses showed that Mg enlarged the MoS 2 interlayer spacing, induced local lattice distortion, and promoted fewer-layer structures, providing favorable structural conditions for the piezoelectric response under ultrasound. Fe species provided Fe 3+ /Fe 2+ redox sites and promoted H 2 O 2 activation. Radical scavenging and fluorescence tests indicated that ·OH was the dominant reactive species in the ultrasound/H 2 O 2 system, while ·O 2 - and h + also participated in degradation. DFT calculations further showed that Mg neighboring Fe sites enhanced H 2 O 2 adsorption on Fe sites and regulated the local charge distribution. This study demonstrates that Fe/Mg co-doping improves the piezo-Fenton catalytic performance of MoS 2 through structural regulation and electronic coupling, offering guidance for efficient MoS 2 -based catalysts. Download: Download high-res image (350KB) Download: Download full-size image Fe/Mg co-doped MoS 2 nanoflowers were synthesized via a one-step hydrothermal method and achieved 97.8% tetracycline degradation within 60 min, with a rate constant 4.0 times that of p-MoS 2 .
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Catalysts
·
2026
·Vol. 16
·期 9
·769
·
IF 4.5
Jingsi Liu,Fan Yang,He Guo
Sulfamethoxazole (SMX), a persistent sulfonamide antibiotic widespread in aquatic environments, resists conventional water treatment degradation. This work developed a NaOAc/Fe3+/O3homogeneous ozonation system for SMX abatement. Four comparative reaction groups confirmed significant synergism between trace Fe3+and sodium acetate. Under optimized near-neutral conditions, 96.19% SMX was removed within 30 min with kobs= 0.107 min−1, outperforming sole O3, O3/NaOAc and O3/Fe3+by 11.0%, 31.0% and 21.9% respectively. Single-factor tests revealed excess Fe3+or acetate suppressed catalytic activity, while alkaline conditions accelerated degradation yet aggravated iron precipitation. Radical quenching and p-CBA probing indicated that acetate coordination did not increase bulk ·OH exposure, while the stronger TEMP-derived TEMPO response after acetate addition was consistent with enhanced1O2-associated oxidation, suggesting that acetate altered the relative contributions of ozone-derived oxidation pathways. Post acetate background deduction, the ternary system achieved higher TOC/COD elimination. Twelve SMX intermediates were identified via LC-MS, with three ring-opening degradation pathways proposed. QSAR toxicity evaluation indicated that most intermediates possessed lower bioconcentration and developmental risks than raw SMX. Overall, the results indicate that weak acetate ligands can alter iron-mediated ozone oxidation pathways, providing a low-dose and economical strategy for antibiotic wastewater treatment.
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