CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Ziming Xin,Chendao Ruan,Jing Wang,Yuejin Zhang,Jiyan Shi
Fe/Mg co-modified biochar enabled simultaneous PFAS adsorption and Cr(VI) reduction–immobilization. • Acid-washed Fe₄Mg₁-NBC showed enhanced removal, pore accessibility, and regenerability. • Experiments and DFT confirmed hierarchical pores, bimetallic sites, and interfacial synergy as key mechanisms. Simultaneous removal of per - and polyfluoroalkyl substances (PFAS) and hexavalent chromium (Cr(VI)) from water remains challenging because of their divergent adsorption, redox, and interfacial behaviors. Herein, Fe/Mg co-modified N-doped biochar (Fe₄Mg₁-NBC) was fabricated through a hydrothermal synthesis strategy followed by pyrolysis and acid washing for the synergistic remediation of PFAS/Cr(VI) co-contaminated water. The optimized Fe/Mg ratio regulated the pore architecture and surface chemistry, producing a hierarchically porous, partially graphitized carbon matrix enriched with oxygen-containing groups and highly dispersed Fe–O/Mg–O active sites. Fe₄Mg₁-NBC exhibited superior removal performance toward PFOA, PFOS, PFBA, PFBS, and Cr(VI) in both single-solute and binary systems, with favorable adsorption under weakly acidic conditions and moderate temperatures. Acid washing further improved performance by eliminating inactive residues, opening blocked pores, and exposing additional active sites, while more than 90% of the initial adsorption efficiency was retained after five regeneration cycles. XPS analysis revealed Fe 2+ /Fe 3+ transformation and Metal–F interactions, indicating that Cr(VI) removal proceeded through Fe-mediated reduction followed by Cr(III) immobilization, whereas PFAS uptake involved electrostatic attraction, coordination, hydrophobic interaction, and pore filling. DFT calculations further demonstrated that Fe/Mg co-doping markedly enhanced PFAS adsorption affinity, decreasing the adsorption energy from +0.43 eV on pristine biochar to −1.24 eV on Fe/Mg-NBC. Co-adsorption configurations also suggested that Fe and Mg sites provided complementary functions for Cr(VI) activation and PFAS stabilization in mixed systems. These findings establish Fe₄Mg₁-NBC as a reusable multifunctional adsorbent for efficient treatment of PFAS/Cr(VI)-contaminated water. Download: Download high-res image (167KB) Download: Download full-size image
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高影响因子
ELECTROCHIMICA ACTA
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2026
·
IF 5.8
Wanying Li,Xing Liu,Jiajing Dong,Jiahui Li,Ting-Ting Li,Ching-Wen Lou
A dual modification strategy combining MHNT tubular structure and Fe doping is proposed. • MHNT tubular structure offers high surface area and effective charge transport channels. • Fe doping introduces impurity levels to tailor the band structure of g-C 3 N. • Photoelectrode material maintains stable photoelectrochemical response after one-year ambient storage. Dopamine (DA), a key neurotransmitter in the central nervous system, exhibits concentration abnormalities that are closely associated with various neurological disorders. Thus, its accurate and stable detection in biological samples is crucial for early diagnosis. In this study, using melamine as a precursor, hydrochloric acid-modified halloysite nanotubes (MHNT) as a porous support material, and FeCl 3 ·6H 2 O as an iron source, an Fe-doped graphitic carbon nitride/halloysite nanotube (Fe-g-C 3 N 4 /MHNT) composite photoelectrode material was successfully synthesized via a hydrothermal dispersion combined with high-temperature calcination method. A photoelectrochemical sensor was subsequently constructed for dopamine detection. Fe doping effectively modulated the band structure of g-C 3 N 4 , broadening the visible light absorption range and suppressing the recombination of photogenerated charge carriers. Meanwhile, the tubular structure of MHNT provided a high specific surface area and efficient charge transport pathways. Under optimized conditions, the sensor exhibited good linearity in the concentration ranges of 10–200 μM and 200–2300 μM, with a sensitivity of 0.527 μA·μM −1 ·cm −2 and a detection limit as low as 0.28 μM (S/N = 3). Moreover, the sensor demonstrated excellent selectivity for dopamine in the presence of interfering substances in simulated body fluid. Notably, after one year of storage at room temperature, the sensor retained a stable linear photocurrent response with a detection limit of only 0.39 μM (S/N = 3), indicating outstanding long-term storage stability. This work effectively overcomes the intrinsic drawbacks of g-C 3 N 4 , including insufficient active sites and rapid charge carrier recombination, through the synergistic strategy of MHNT incorporation and Fe doping, providing a viable pathway for the development of highly selective and stable photoelectrochemical sensors. Download: Download high-res image (201KB) Download: Download full-size image
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Journal of Water Process Engineering
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2026
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IF 6.6
Kun Li,Fangdu Chen,Junbao Yu,Juan Yang
Fe₇₈Si₉B₁₃ maintained stable NOR degradation during ten reuse cycles. • Surface chemical evolution of Fe₇₈Si₉B₁₃ was revealed after catalytic cycling. • Thirty transformation products enabled the proposal of five pH-dependent NOR pathways. • QSAR predicted pathway-dependent ecological risks of NOR transformation products. Fe₇₈Si₉B₁₃ amorphous alloy was employed as a heterogeneous Fenton-like catalyst for norfloxacin (NOR) degradation, with emphasis on pH-dependent transformation behavior and ecological implications of generated intermediates beyond parent-compound removal. The Fe₇₈Si₉B₁₃/H₂O₂ system achieved rapid NOR degradation, with complete removal within minutes under acidic conditions, and maintained catalytic activity during ten consecutive cycles. Structural and surface analyses demonstrated that the amorphous framework remained stable during repeated reactions, accompanied by surface oxidation and chemical-state changes. The transformation of B species from B B to B O during cycling suggested a possible contribution of B evolution to maintaining catalytic performance. High-resolution mass spectrometry identified 30 transformation products and revealed five NOR transformation pathways under acidic and weakly acidic conditions. Density functional theory (DFT) calculations further demonstrated that pH-dependent protonation states altered the electronic distribution and radical-reactive regions of NOR, providing molecular-level insights into pathway variations. Under acidic conditions, transformation products were mainly associated with pathways I–III, whereas weakly acidic conditions were mainly associated with pathways IV and V, leading to distinct transformation profiles and QSAR-predicted ecotoxicity characteristics. These findings highlight that the environmental performance of Fenton-like oxidation processes should be evaluated by integrating degradation efficiency, transformation behavior, and ecological risks of generated intermediates. Download: Download high-res image (211KB) Download: Download full-size image
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
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IF 4.6
Wenhua Li,Ruilin Wang,Xiang Li,Ge Gao,Chuanyong Yan,Qianqiao Chen
ZIF confinement disperses CoFe nitride uniformly and tunes Co/Fe ratio precisely. • Co/Fe bimetallic coupling lead to synergistic effects for bifunctional HER/OER. • Low overpotentials reach 85 mV (HER@10 mA·cm −2 ) and 273 mV (OER@50 mA·cm −2 ). • Overall water splitting requires 1.59 V at 10 mA·cm −2 with durability over 100 h. CoFe-based materials are considered promising bifunctional catalysts for overall water splitting due to multicomponent synergistic effects. However, unrestricted metal atom migration during high-temperature synthesis causes particle aggregation and excessive Co–Fe interdiffusion, which destroys bimetallic interfacial structures, covers active sites, and hinders electronic modulation, thus limiting catalytic activity and stability. To solve these problems, a ZIF-assisted spatial confinement strategy is adopted herein. The ZIF framework constrains high-temperature atomic migration, alleviates particle coarsening, and weakens metal interdiffusion to maintain intact bimetallic interfacial environments, while exposing sufficient active sites. Further combining carbonization and in-situ nitridation modification, a composite system of CoFe metal nitride and N-doped carbon was prepared, significantly improving the kinetic properties of HER and OER. The optimal catalyst achieves an overpotential of 85 mV for the HER at 10 mA·cm −2 , and 273 mV for the OER at 50 mA·cm −2 , exhibiting superior catalytic performance compared with commercial noble-metal benchmarks. The assembled overall water splitting system requires only 1.59 V at a working current of 10 mA·cm −2 , and can operate stably for 100 h at 50 mA·cm −2 . This work provides a reliable strategy for inhibiting high-temperature structural degradation of CoFe-based catalysts toward high-efficiency and durable electrocatalytic water splitting.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·124918
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IF 7.5
Zhouxiao Zhai,Jingce Bi,Linshan Wang,Ningning Liu,Yi Wang,Xia Zhang,Zhuopeng Wang,Yide Han
It remains challenging to fabricate bimetallic MOF-derived catalysts with efficient redox cycling to active peroxydisulfate (PDS) in advanced oxidation processes for antibiotic removal. Herein, a surface-static synthesis strategy was employed to prepare a bimetallic core–shell catalyst (M@Z(Co 3 Zn 1 )). This strategy retained its original morphology and established synergistic Fe 2 + /Fe 3+ and Co 2+ /Co 3+ redox cycles to facilitate PDS activation. As a result, the M@Z(Co 3 Zn 1 )/PDS system achieved 97.6% tetracycline (TC) removal within 60 min, with a corresponding k obs value of 0.05742 min −1 , which is significantly higher than those of Z(Co 3 Zn 1 ) (77.1% and 0.01922 min −1 ), M(Fe) (62.0% and 0.01184 min −1 ) and catalysts reported in previous studies. The system maintained excellent stability over five consecutive cycles with low metal leaching. Furthermore, an extreme gradient boosting (XGBoost) model was developed to accurately predict catalytic performance under different operating conditions, demonstrating the potential of machine learning for catalyst-system optimization in wastewater treatment. This work provides a new strategy for the structural regulation of bimetallic MOF-derived catalysts and highlights the integration of machine learning with catalytic process design for antibiotic-contaminated water remediation.
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高影响因子
CORROSION SCIENCE
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2026
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IF 10.3
Chengyu Wang,Ming Cheng,Haofeng Luo,Tao Jiang,Wentao Zhou,Yafei Wang
Molten salts are widely used in high-temperature nuclear systems, yet their interactions with structural alloys, particularly under the influence of fission product species, are still not fully understood. In this study, the corrosion behaviors of Fe-based 316L stainless steel (316L SS) and Ni-based Inconel 600 alloy were investigated in LiCl-KCl eutectic molten salt at 500 °C, under the influences of thermodynamically active lanthanide and less-active lanthanide/non-lanthanide fission product species. The results reveal that both active and less-active lanthanide species enhance the corrosion of alloys in molten salt, whereas less-active non-lanthanide barely affect the alloy’s corrosion as thermodynamically expected. The unexpected corrosion enhancement caused by less-active lanthanide species (Ce 3 + , La 3+ , Nd 3+ , Sm 3+ , Pr 3+ , Gd 3+ , and Y 3+ ) is attributed to the formation of lanthanide oxychlorides (LnOCl, Ln represents less-active lanthanide species), driven by trace oxygen present in Ar atmosphere. Furthermore, the 316L SS was found to exhibit better corrosion resistance than Inconel 600 alloy in LiCl-KCl molten salt containing fission products, despite Ni-based alloys being widely regarded as more corrosion-resistant than Fe-based alloys in molten salt environments. This study systematically investigates, for the first time, the effects of fission products on both Fe-based and Ni-based alloys in molten salt, providing a comprehensive understanding of the behavior of structural alloys for molten salt applications in the nuclear industry.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
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IF 4.4
Bingkun Liu,Juncheng Guo,Ziyang Liang,Yuhan Yang,Beibei Liu,Bing Han,Yonghui Zhang
NH 2 -MIL-101(Fe)/few-layer Ti 3 C 2 Schottky heterojunctions are constructed. • NH 2 -MIL-101(Fe)/Ti 3 C 2 composite shows higher photocatalytic activity for Cr(VI) removal. • The Schottky heterojunctions boost the separation of photogenerated charges. • The photogenerated electrons and •O 2 − dominate the Cr(VI) reduction process. The limited charge transfer efficiency of single-component semiconductor photocatalysts remains a critical bottleneck restricting the photocatalytic elimination of harmful pollutants. Here, NH 2 -MIL-101(Fe) nanoparticles are anchored onto few-layer Ti 3 C 2 nanosheets via electrostatic self-assembly to construct NH₂-MIL-101(Fe)/Ti 3 C 2 heterostructure. The few-layered 2D Ti 3 C 2 supplies abundant adsorption and catalytic active sites. Furthermore, benefiting from the Schottky junction and the superior conductive feature of Ti 3 C 2 MXene, the separation and transport of photoinduced carriers are remarkably promoted in the NH 2 -MIL-101(Fe)/Ti 3 C 2 . Accordingly, the optimized NH 2 -MIL-101(Fe)/Ti 3 C 2 –10% sample can remove 95.7% of Cr(VI) after 150 min of visible-light irradiation and still exhibits favorable reusability after three cycles. The electrons and •O 2 − are confirmed as the primary active species driving Cr(VI) reduction. Combined with comprehensive characterizations, a plausible photocatalytic mechanism of Cr(VI) reduction is put forward. This work offers fundamental guidance for developing MXene-based Schottky heterostructures toward improved photocatalytic activity.
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高影响因子
Sustainable Materials and Technologies
·
2025
·
IF 9.2
Xianjin Qi,Guizhi Yan,Boyu Du,Mengmeng Wang,Yongkui Li
Arsenic (As) contamination is a global problem that requires innovative remediation, this study successfully synthesized a novel MnFe 2 O 4 -Zn/Co ZIFs@MIL-53(Fe) (MFZM) using a solvent method to remove As(V) from contaminated water. The MFZM exhibited a rhomboidal dodecahedron structure with a high specific surface area of 158.93 m 2 /g, which contributed to its exceptional adsorption performance under both acidic and neutral pH conditions. Notably, the adsorption capacity for As(V) reached approximately 599.90 mg/g at an equilibrium concentration of 500 mg/L, surpassing the performance of several previously reported adsorbents. The kinetic modelling results indicated that the adsorption process followed a pseudo-second-order mechanism, suggesting chemisorption as the dominant process. However, the isotherm studies demonstrate favorable single-layer adsorption, with the Langmuir model providing the best fit for the experimental data. The X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDS) analysis revealed that the Fe/Mn/Co on the MFZM surface can hydrolyze and generate Fe/Mn/Co-OH groups under pH conditions ranging from 3 to 7, facilitating the formation of stable coordination complexes with As(V). Furthermore, the MFZM provided abundant positively charged adsorption sites that effectively attracted HAsO 4 2− via electrostatic interactions, leading to efficient As(V) removal. These findings underscore the potential of the MFZM as a promising adsorbent for the effective remediation of As-contaminated wastewater, supporting sustainable environmental management.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Aojie Li,Qiao Jiang,Tianyi Suo,Liang Chen,Hong Yin,Junlin Huang,Wen-Yuan Xu,Yuan Li,Binhong He,Wei Wang
Non-noble metal single-atom catalysts with high catalytic activity have garnered considerable attention from researchers in recent years. Yet, their synthesis is affected by various factors, making process optimization a challenging and systematic task. In this study, single-atom Fe–N–C porous hollow microspheres were successfully synthesized via ultrasonic spray pyrolysis, with machine learning employed to optimize the fabrication process. Machine learning models, trained on pre-experimental data, identified the key factors influencing material structure and oxygen reduction reaction (ORR) performance. The resulting Fe–N–C (600–900) material demonstrated excellent ORR activity with a half-wave potential of 0.865 V, along with high stability and methanol tolerance. When applied to traditional liquid zinc–air batteries (ZABs), it achieved an open-circuit voltage of 1.56 V and a maximum power density of 313.4 mW cm–2, with a discharge capacity of 806.5 mAh gZn–1 at 10 mA cm–2, outperforming commercial noble metal catalysts. This work offers valuable insights into the application of machine learning for optimizing ORR catalysts and designing high-performance materials for energy conversion devices.
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PubMed
高影响因子
ACS Nano
·
2025
·
IF 16
Fengbo Wang,Xiyu He,Guangmeng Qu,Muhammad Mamoor,Yanjun Zhai,Lu Wang,Bin Wang,Zhongxin Jing,Yueyue Kong,Dedong Wang,Lingtong Kong,Liqiang Xu
The application of a flexible Zn–air battery (FZAB) in next-generation wearable electronics is mainly hindered by the sluggish oxygen reduction/evolution reaction (ORR/OER) and unstable Zn/electrolyte interface, particularly at relatively high-rate ability (10 mA cm–2). Herein, a Fe2N/pyridinic N-rich coordinated Fe single atom (defined as “Fe2N/PR-Fe SA”) heterostructure is designed for optimizing the plane-symmetric Fe-4N coordination, which demonstrates outstanding bifunctional electrocatalytic performance with a low ORR/OER potential gap of 0.63 V. Experimental analyses and theoretical calculations reveal that the electronic structure of Fe single atoms, derived from the synergistic interaction between Fe2N with a triangular pyramidal Fe3N coordination and pyridinic FeN4, can effectively accelerate the desorption of the *OH intermediate in the ORR and optimize the *OOH/*O adsorption behavior during the OER process. Moreover, the in situ hydrogel electrolyte (HGE) is designed on the surface of the zinc anode to limit interface water content and eliminate the formation of deposition “hot spots” for improving Zn electrochemical reversibility (203 h at 1 mA cm–2/1 mA h cm–2 with Zn//Zn-symmetric battery). Therefore, the constructed FZAB based on Fe2N/PR-Fe SA and the in situ HGE exhibits a high maximum power density (157.3 mW cm–2), a long lifetime (193 h at 2 mA cm–2), small discharge/charge voltage polarization (0.81 V at 10 mA cm–2), and excellent mechanical flexibility.
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PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 25
·19826-19835
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IF 4.6
Suxing Luo,Jiang Li,Meizhi Yang,Ping Zeng,Yuanhui Wu
Enhancing supercapacitor performance by incorporating heteroatoms into biochar represents a fascinating strategy. Our study presented an uncomplicated process for creating porous biochar simultaneously doped with nitrogen (N), phosphorus (P), and iron (Fe). The source material was excess sludge from sauce-flavor liquor production, which conveniently provided high initial N and Fe content for the resulting biochar. The phosphorus originated from phytic acid, while gentle activation was achieved using potassium carbonate (K2CO3). We found that adjusting the K2CO3 proportion and activation heating allowed precise control over the final material's characteristics, including its pore network, surface chemistry, plus the ultimate N, P, and Fe levels. Through electrochemical assessment, the N, P, Fe/BC-700-2 sample demonstrated superior performance, exhibiting a specific capacitance up to 141.7 F g−1 when tested at a 1 A g−1 current density in 6 M KOH electrolyte. This efficacy stemmed from several contributing elements: a large specific surface area (BET, 824.5 m2 g−1), abundant structural imperfections coupled with extensive mesoporosity, and advantageous synergistic effects arising from N, P, Fe co-incorporation. This investigation demonstrates that transforming sauce-flavor liquor excess sludge (SFLS) into heteroatom-enriched biochar not only offers significant promise for developing advanced supercapacitor electrode materials but also provides a sustainable pathway for valorizing problematic industrial waste.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 3.9
Chen Chen,Guo Yan,He Leilei,Liang Ying,Zhang Mingxin,Wang Wenmin,Chen Yuliang,Wu Yuliang,Meng Rui,Huang Weiwei,Yang Fei,Cheng Jun,Yi Xuesong
The development of efficient and cost-effective catalytic systems for antibiotic degradation remains a significant challenge in environmental remediation. Herein, a novel Co/CuFe 2 O 4 composite was synthesized via a sol–gel combustion method to construct a multi-metal synergistic photocatalytic-Fenton-like system for the degradation of oxytetracycline (OTC). Density functional theory (DFT) calculations indicate that the incorporation of Co leads to a more negative material formation energy, suggesting that Co/CuFe 2 O 4 has a more stable electronic structure. This optimized electronic structure enhances the redox cycle (Fe 3+ /Fe 2+ , Cu 2+ /Cu + , and Co 2+ /Co 3+ ), thereby improving the activation efficiency at low concentrations of H 2 O 2 (0.1–6 mmol/L). Under optimal conditions (pH 3, 35 °C, 4 mmol/L H 2 O 2 ), the 13% Co/CuFe 2 O 4 catalyst achieved complete OTC degradation within 60 min, with an 0.1 mmol/L H 2 O 2 utilization rate of 17.81% at neutral pH. Moreover, the catalyst exhibited excellent stability, retaining 87.5% degradation efficiency after five cycles. Radical quenching experiments confirmed that ·OH, h + , and ·O 2 − were the dominant reactive species, while the synergistic effect of multiple metal redox pairs facilitated efficient electron transfer and H 2 O 2 activation. This work provides a promising strategy for designing high-performance Fenton-like catalysts with broad pH adaptability and low oxidant consumption, offering significant potential for the treatment of antibiotic-contaminated wastewater. Graphical
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