APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
·
IF 19.7
Yifei Liu,Defa Liu,Ying Yu,Zumin Wang,Ruziev Umidjon Abdimajitovich,Donaev Sardor Burkhanovich,Semencha Alexander Vyacheslavovich,Lei Wang,Lingbo Zong,Bin Li,Xufang Qian
Fe-Cu dual-atom sites were prepared through pre-coordination and ultrafast Joule heating. • FeCu-N-MCS displays a large E 1/2 , low H 2 O 2 yield and excellent stability. • FeCu-N-MCS suppresses H 2 O 2 accumulation through hydrogen peroxide reduction reaction (HPRR). • Cooperative interaction of dual-atom sites reduces the energy barrier of OH* desorption for 4e⁻ ORR. • Zn-air batteries achieve ultrahigh power density and remarkable charge/discharge stability. The oxygen reduction reaction (ORR) governs the power output and cycling lifetime of metal-air batteries. Fe-N-C single-atom catalysts are among the most promising precious-metal-free ORR electrocatalysts, but their durability is often compromised by H 2 O 2 generated through the competing two-electron ORR pathway, which can trigger Fenton reactions and radical-induced catalyst degradation. Herein, Fe-Cu dual-atom sites anchored on microporous carbon spheres (FeCu-N-MCS) are constructed through a pre-coordination strategy followed by rapid Joule heating. Combined experimental results and density functional theory (DFT) calculations reveal that the electronic coupling between Fe and Cu sites lowers the energy barrier of the rate-determining step for the four-electron ORR pathway. More importantly, the Fe-Cu dual-site configuration enables spontaneous hydrogen peroxide reduction reaction (HPRR) at Fe sites and significantly facilitates OH* desorption during HPRR, thereby suppressing H 2 O 2 accumulation and alleviating Fenton-type oxidative degradation. Consequently, FeCu-N-MCS delivers outstanding ORR performance with a half-wave potential of 0.91 V, a low H 2 O 2 yield below 2.91%, and 91.05% current retention after 100 h. Aqueous Zn-air batteries (A-ZABs) assembled with FeCu-N-MCS achieve a peak power density of 223.73 mW cm −2 and stable cycling for over 1200 h. FeCu-N-MCS-based Quasi-solid-state ZABs (QSS-ZABs) further exhibit an open-circuit voltage (OCV) of 1.52 V and a power density of 246.85 mW cm −2 . This work establishes a dual-atom-site strategy for coupling high ORR activity with H 2 O 2 -resistant durability, offering mechanistic insight into the design of robust precious-metal-free electrocatalysts for advanced metal-air batteries. Download: Download high-res image (220KB) Download: Download full-size image Fe-Cu dual-atom sites were prepared through pre-coordination and Joule heating. The incorporation of Cu sites into Fe-N-MCS not only reduces the energy barrier of the rate-determining step (RDS) to accelerate the 4e⁻ ORR pathway, but also enables spontaneous hydrogen peroxide reduction reaction (HPRR) to suppress H 2 O 2 accumulation and Fenton corrosion. Consequently, the assembled Zn-air batteries achieve remarkable power density and ultra-long cycling stability.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123857
·
IF 7.5
Weitian Yang,Ning Gan,Jiahao Yu,Siyi Zhao,Hao Yi,Ting Guo,Zuoping Zhao
The efficient removal of nanoplastics from aquatic environments remained a critical environmental challenge. Herein, MIL-88A(Fe) was employed as the precursor to fabricate a series of magnetic iron oxide/carbon composites (M-T, M = MIL-88A(Fe), T = 300–800 °C) via controlled pyrolysis. Among them, the optimized M-600 preserved a spindle–like morphology, with superparamagnetic Fe 3 O 4 nanoparticles uniformly embedded in the carbon matrix. M-600 exhibited exceptional adsorption performance with excellent magnetic separability, achieving 97.46% removal efficiency for polystyrene nanoplastics (PSNPs) (pH=7, 0.3 g·L −1 , 25 °C). It worked within the pH range of 2.0–7.0. The efficiency was 63.97% after five cycles, and the maximum adsorption capacity was 69.97 mg·g −1 . The adsorption kinetics followed the pseudo-first-order model, while the adsorption isotherm was well fitted by the Sips model. Its favorable wettability facilitates interfacial contact, and the efficient capture of PSNPs was dominated by electrostatic attraction and further strengthened by π–π stacking interactions. Overall, this study provides a technically reliable and promising strategy for nanoplastic removal.
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高影响因子
Small
·
2026
·
IF 11.8
Junbin Li,Jiaqi Tang,Jingwen Ma,Zhijun Zhang,Xiang Li
To address the stability limitations of conventional Fe─N─C catalysts caused by H 2 O 2 byproducts and reactive oxygen species (ROS), an innovative dual-metal single-atom synergistic strategy is developed, resulting in the fabrication of a hierarchically porous hollow carbon fiber catalyst co-anchored with Fe and Ce dual-atom sites (FeCe DAC/HCNF). The catalyst features an interconnected network of hollow channels and carbon nanocages, forming a hierarchical micro/mesoporous structure (specific surface area: 935.24 m 2 g −1 ) that enhances mass transport efficiency and maximizes exposure of active sites. The dual-atom site is developed to achieve a “kill two birds with one stone” effect: Ce single-atom sites adjacent to Fe centers not only effectively scavenge ROS and decompose H 2 O 2 , but also modulate the Fe centers, thereby synergistically enhancing the intrinsic ORR activity while mitigating carbon matrix degradation. The FeCe DAC/HCNF catalyst exhibits exceptional electrochemical performance and stability in both alkaline and acidic media. When integrated into zinc-air batteries, it achieves superior device performance compared to Fe─N─C catalysts, with a remarkable cycling durability of 2300 cycles (∼1100 h of stable operation). This work breaks the traditional activity-stability trade-off of catalysts, providing a novel pathway for developing high-durability zinc-air batteries.
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高影响因子
Materials Today Physics
·
2026
·
IF 9.3
Xuan Zhang,Xuguang An,Jing Zhang,Qian Liu,Lisi Xie,Zhao Li,Xiaolei Li,Weitang Yao,Qingquan Kong
Self-supported Fe–CoMoO 4 /NF nanosheets were fabricated. • The optimized catalyst delivers an ammonia yield of 44.6 ± 0.12 mg −1 cm −2 and high FE of 98.77 ± 0.23% at −0.8 vs. RHE. • The electrocatalytic mechanism was investigated. • Zn- NO 2 − battery with Fe-CoMoO 4 /NF as cathode were tested. The electrochemical reduction of nitrite to ammonia (NO 2 − RR) plays a pivotal role in closing the nitrogen cycle and mitigating nitrogenous pollution. Herein, we report a self-supported, Fe-doped CoMoO 4 nanosheet electrode grown on nickel foam (Fe-CoMoO 4 /NF), via a scalable hydrothermal-immersion strategy. Benefiting from Fe-induced electronic modulation and retention of the robust, hierarchical nanosheet architecture, the optimized Fe-CoMoO 4 /NF delivers an exceptional NH 3 yield of 44.6 ± 0.12 mg h −1 cm −2 with an ultrahigh Faradaic efficiency of 98.77 ± 0.23% at −0.8 V vs. RHE. In-situ differential electrochemical mass spectrometry (DEMS) coupled with density functional theory (DFT) calculation results reveal that NO 2 − reduction on Fe–CoMoO 4 /NF proceeds through nitric oxide-related intermediates, followed by sequential proton-coupled electron transfer steps toward NH 3 formation. When integrated into a Zn−NO 2 − battery, the catalyst enables a remarkable peak power density of 16.9 mW cm −2 , surpassing the performance of most previously reported electrocatalysts for NO 2 − RR. Fe-doped CoMoO 4 nanosheet self-supported on nickel foam enables highly efficient and selective electrocatalytic reduction of nitrite to ammonia, achieving an exceptional NH 3 yield of 44.6 ± 0.12 mg h −1 cm −2 and an ultrahigh Faradaic efficiency of 98.77 ± 0.23% at −0.8 V vs. RHE in neutral solution. Download: Download high-res image (436KB) Download: Download full-size image
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高影响因子
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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高影响因子
Catalysts
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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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高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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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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高影响因子
NEW JOURNAL OF CHEMISTRY
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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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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2026
·
IF 5.2
Feng Liu,Yanping Song,Pengzhan Yang,Lei Xiong,Xu Yang,Xiang Zhang,Shuai Han,Cui Liu,Nian Li
Rational design of high-performance, non-precious bifunctional electrocatalysts for overall water splitting is crucial yet challenging. Herein, a synergistic dual-optimization strategy is proposed, which simultaneously enhances the intrinsic activity at the material level and the mass/charge transfer at the electrode level. Specifically, Fe-doped CoS 2 nanoparticles are in-situ anchored onto a three-dimensional porous laser-induced graphene (LIG) framework, constructing an integrated, binder-free Fe-CoS 2 /LIG electrode. Experimental and spectroscopic characterizations reveal that Fe doping effectively modulates the electronic structure of CoS 2 , inducing lattice contraction and enriching high-valence Co 3+ species, thereby optimizing the adsorption energetics of reaction intermediates. Concurrently, the 3D interconnected LIG substrate serves as a highly conductive and hierarchical gas transport network, which not only prevents the restacking of catalysts but also ensures rapid electrolyte infiltration and efficient bubble detachment. Benefiting from this synergistic design, the Fe-CoS 2 /LIG electrode demonstrates superior electrocatalytic performance for both oxygen and hydrogen evolution reactions individually in 1 M KOH. Remarkably, it achieves low overpotentials of 300 mV for the oxygen evolution reaction and 86 mV for the hydrogen evolution reaction at 10 mA cm -2 , along with rapid reaction kinetics (Tafel slopes of 86 and 94 mV dec -1 , respectively) and robust long-term stability (≥36 h). This work underscores the effectiveness of coupled electronic and structural engineering for designing high-performance, non-precious electrocatalysts.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2026
·
IF 4.9
Hongbin He,Xi Zhu,Ziping Huo,Bolong Liang,Shu-Xuan Liang
AgI@MIL-101(Fe) photocatalyst was fabricated via in-situ precipitation method. • The photocatalyst achieved 95.25% degradation efficiency of OTC within 180 min. • The photocatalyst exhibited excellent practical applicability in real water samples. • Z-scheme heterojunction mechanism and degradation pathway were elucidated. Owing to their extensive and long-term application as well as poor degradability, antibiotics are inevitably persistent in aquatic environments due to their extensive and long-term use as well as heir difficulty in degradation. The development of efficient photocatalysts is therefore of crucial significance in environmental purification. In this study, a Z-scheme MIL-101(Fe) heterojunction photocatalyst was rationally designed and fabricated via a combined solvothermal and in-situ precipitation methods for the efficient removal of oxytetracycline hydrochloride (OTC), where MIL-101(Fe) is a typical member of the metal-organic framework (MOF) family. A series of characterization methods were employed to systematically observe the morphology and microstructure, optical properties, and photocatalytic performance of the as-prepared photocatalyst. The AgI@MIL-101(Fe) nanocomposites achieved an OTC degradation efficiency of 95.25% within 180 min under visible-light irradiation, demonstrating superior photocatalytic activity compared to a single-component counterparts. Structural characterizations results indicated that AgI formed a tight interface contact with MIL-101(Fe), which provided an effective structural foundation for theheterojunction construction. AgI particles were well dispersed on MIL-101(Fe), effectively mitigating their aggregation and thus creating abundant light absorption and reaction sites for photocatalytic reactions. Photoelectrochemical measurements further demonstrated that the nanocomposite possessed strong light absorption ability and high separation efficiency for photogenerated carriers. The as-prepared photocatalyst also exhibited excellent practical applicability in the treatment of actual water samples from Baiyangdian Lake. Five cycles of experiments indicated that its outstanding structural and catalytic stability. Mechanistic investigations identified superoxide radicals (•O 2 − ) as the primary active factors responsible for OTC degradation. Finally, the typical Z-scheme heterojunction mechanism and degradation pathway of OTC were finally proposed. This work provides a new design strategy and practical reference for the development of high-performance photocatalysts targeting the efficient removal of OTC and other antibiotics from aquatic environments. Download: Download high-res image (211KB) Download: Download full-size image
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Yujie Sun,Daijie Deng,Chaozhong Guo,Rong Hu,Yimin Chen,Huiyan Cao,Zhiyuan Cui,Rong Jin,Yao Liu,Yujun Si,Quan Xu
The development of highly active and durable oxygen reduction reaction (ORR) electrocatalysts is crucial for the advancement of zinc-air batteries. A dual-ligand stepwise preordination strategy is employed to synthesize the Fe–Ce bimetallic carbon-based catalyst (Ce/Fe–NC) with abundant Fe–N x /Ce–N x sites and Fe 3 O 4 , and a hierarchical micropore-mesopore structure. The introduction of Ce-related species significantly modulates the electronic structure of Fe sites, which is consistent with possible d–f orbital hybridization and d -band center regulation of Fe. Such electronic effect reduces the ORR energy barrier and endows Ce/Fe–NC with a half-wave potential of 0.875 V. The prepared CeO 2 with a fast Ce 3 + /Ce 4+ redox couple efficiently scavenges reactive oxygen species to inhibit the degradation of Fe–Nₓ sites and Fe 3 O 4 species, as well as the corrosion of carbon skeleton caused by Fenton reaction byproducts, ultimately enhancing the stability of the Ce/Fe–NC. After 30,000 accelerated cycles, the half-wave potential of the Ce/Fe–NC only decreases by 15 mV, and maintains a 95.4% current retention rate over 10,000 s. The zinc-air battery with Ce/Fe–NC achieves a peak power density of 230 mW cm −2 , a specific energy of 870.5 Wh kg –1 (Zn) , and a stable charge-discharge voltage gap over 100 h of cycling. This work provides a novel strategy for the preparation of high-performance non-precious metal ORR catalysts.
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高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 5
·347
·
IF 5.4
Li Xiaoming,Mao Qiu,He Lin,Zhang Zhengwei,Liu Dongmei,Liu Lu,Ju Pan,Ding Shijia,Li Siqiao,Luo Rong
Bimetallic Fe/Mo-doped carbon dots (Fe/Mo-CDs) have been developed as a high-performance nanozyme to construct a self-validating dual-mode (colorimetric/fluorometric) platform for hydroquinone (HQ) detection. The Fe/Mo-CDs exhibited strong peroxidase-like activity, catalyzing H 2 O 2 -mediated TMB oxidation to generate oxTMB, which simultaneously yields a colorimetric signal and quenches the fluorescence of Fe/Mo-CDs through a confirmed FRET process. The introduction of HQ competitively scavenges the essential reactive oxygen species, inhibiting oxTMB formation and triggering synchronous signal inversion in both channels. This endogenous self-validating function enables favorable analytical performance, with wide linear ranges and ultralow detection limits (0.03 µM for colorimetric; 0.016 µM for fluorometric). Successful application in commercial creams with satisfactory recoveries underscores its strong potential for accurate and reliable screening in complex samples. This work not only presents a sensitive sensor for HQ but also offers a novel design strategy for developing intelligent, self-validating biosensing systems.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）