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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WATER RESEARCH
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2025
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IF 12.4
Zhiqiang Zuo,Yiying He,Miao Guo,Tao Liu,Min Zheng,Yanchen Liu
Ferrous-based iron salts (e.g., FeCl 2 ) have been commonly used for sulfide control in sewers, where they chemically generate ferrous sulfide (FeS) particles to remove dissolved sulfide. This study demonstrates that oxidation of FeS particles in sewer sediments can further enhance sulfide removal, likely due to the formation of hydroxyl radical (•OH) during FeS oxygenation. For the first time, an integrated kinetic model was developed to describe •OH production and consumption by FeS oxygenation in sewer environment. The model was validated against three independent sets of batch experiments, including (1) dynamics of •OH production from FeS oxygenation, (2) dynamics of •OH production from sewer sediment oxygenation, and (3) sulfide removal under various conditions. Model-based analysis identified three key sulfide chemical oxidation pathways (•OH, Fe (III), O 2 ), with the •OH pathway significantly contributing 63–97 % of sulfide oxidation in gravity sewers with surface reaeration. An empirical function ( a × C FeS b ) was further introduced to quantify the influence of FeS on sulfide oxidation rates, which can be integrated into existing sewer management models for improved control strategies. Overall, this work identifies •OH oxidation as a dominant pathway for sulfide removal in ferrous-dosed sewers, challenging the traditional view that oxygen is the primary driver of sulfide oxidation.
研究领域:
环境工程
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化学工程
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水处理
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无机化学
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建模与仿真
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PubMed
高影响因子
FOOD CHEMISTRY
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2025
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IF 9.8
Zhen Huang,Lu Luo,Pengcheng Lin,Donglin Cao,Wei Xiao
Glutathione (GSH) is a key bioactive substance that significantly influences food nutrition and safety. In this study, a novel colorimetric sensing platform was developed based on sulfur vacancy FeS (SV-FeS) mimetic enzyme for rapid and quantitative detection of GSH in food samples. The mimetic enzyme features a three-dimensional micro-flower structure with high specific surface area, exhibiting exceptional peroxidase-like (POD-like) activity. It demonstrates high substrate affinity with a low Michaelis constant (Kₘ) of 0.123 mM toward H 2 O 2 . The sensor showed excellent linearity in the range of 0.5–100 μM (R 2 = 0.998) with a detection limit of 0.38 μM. To meet point-of-care testing (POCT) requirements, a microfluidic paper-based analytical devices (μPADs) integrated with an SV-FeS (pH = 3, 1 h) mimetic enzyme and a smartphone-based readout system was constructed. This sensor enables one-step GSH quantification within 5 min, achieving a linear range of 35–500 μM (R 2 = 0.990) and a detection limit of 10.4 μM. In practical applications, the sensor demonstrated satisfactory performance with spiked recoveries of 95.5 %–102.5 %, relative standard deviation below 8 %, and maintained stability for 14 days at 4 °C. This work provides an effective solution for on-site GSH detection in food quality and safety monitoring.
研究领域:
食品科学与技术
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分析化学
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生物传感器
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纳米材料
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现场检测
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PubMed
高影响因子
WATER RESEARCH
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2023
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IF 12.8
Huimin Liu,Dejin Liu,Yuancai Chen
Considering the negligent degradation of sulfamethoxazole (SMX) by Citrobacter freundii JH , the incorporation of bio-FeS could initiate the SMX biodegradation to 0.0444 (S-FeS), and further to 0.0564 mg L −1 mg −1 protein d −1 (SN-FeS) when coexisted with nitrate. Electrochemical (LSV, I-t , DPV, EIS and EDC) and respiratory inhibition experiments clarified that the bio-FeS could greatly switch/redistribute electron transmembrane-transfer from intracellular to extracellular mainly via FDH/Hases-S-chain, as revealed by the significant increase of ipa- FDH/Hases / ipa- FC-Cyts and ipc- FDH/Hases / ipc- FC-Cyts (from 1.09 and 1.07 (SN-native) to 1.50 and 3.58 (SN-FeS)), while nitrate (linear fitting with NADH ( R 2 = 0.9903)) mainly intensified CoQ-L-chain related INET from Complex I to CoQ to compensate for the electronic competition with SMX. SN-FeS system detoxified the SMX on microbial metabolism (such as membrane rupture and oxidative stress induction) with high SOD activity (737.93 U g FW −1 ). Structural equation modeling indicated that bio-FeS up-regulated PMF-mediated ATP synthesis ( P PMF-ATPs from 0.12 (SN-native) to 0.74 (SN-FeS)) and PMF-mediated NADH ( P PMF-NADH from -0.72 (SN-native) to 0.63 (SN-FeS)), and the nitrate addition intensified this positive feedback. Overall, this study provides a new perspective for bionanoparticles via electron transfer/redistribution to detoxify and launch the antibiotics biodegradation in ecological environment.
研究领域:
环境生物学
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微生物学
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Liping Liang,Yun Zhang,Fenfen Xi,Songhua Lu,Jianfeng Ma
The photocatalytic reduction of soluble U(VI) to insoluble U(IV) is an effective method for the treatment of uranium-containing wastewater. This study focuses on developing an efficient catalyst for the photocatalytic reduction of U(VI). Herein, FeS was synthesized by liquid-phase precipitation and modified onto BiFeVO 4 . The results demonstrated that the BiFeVO 4 -to-FeS mass ratio of 1:1 combined with a material aging time of 24 h (denoted as BiFeVO 4 /FeS-24) achieved the highest U(VI) reduction efficiency under visible light, which was mainly attributed to the adsorption and reduction of U(VI) by FeS, and the reduction of U(VI) by photo-induced electron and •O 2 − . Notably, the U(VI) removal efficiency of BiFeVO 4 /FeS-24 (84.3 %) was significantly higher that of BiFeVO 4 (9.1 %) and FeS (56.7 %) alone. The maximum U(VI) adsorption capacity of the material is 87.26 mg/g in the dark reaction stage, whereas its maximum U(VI) removal capacity reaches 301.2 mg/g under visible light. BiFeVO₄/FeS-24 maintains high removal efficiency even after five reuse cycles, indicating its high stability and excellent recyclability. The photocatalytic reduction mechanism of U(VI) by BiFeVO 4 /FeS-24 was elucidated through XPS, Mott-Schottky, EIS, I-t, and EPR. These analyses revealed that the excellent photocatalytic performance of BiFeVO 4 /FeS-24 in U(VI) removal stems from crystal structural integration and the formation of a Z -scheme heterojunction, which effectively narrows the band gap, enhances visible light absorption, and facilitates the separation of photogenerated electron-hole pairs. Overall, this study provided a simple approach for the effective removal of U(VI) from uranium-containing wastewater.
研究领域:
环境科学
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材料化学
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光催化
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核废物处理
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水净化
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高影响因子
Journal of Water Process Engineering
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2026
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IF 6.6
Kaipian Shi,Junfeng An,Yu Yin,Li Yin,Ziyu Rong,Jinyu Han,Shiyin Li
A stable XG-WAS@n-FeS slurry was constructed for simultaneous removal of Cr(VI) and TBBPA. • Xanthan gum enhanced slurry viscosity, stability, and oxidation resistance. • TBBPA was transformed through successive debromination reactions. • Coexisting contaminants influenced TBBPA removal through site competition. Nanoscale ferrous sulfide (n-FeS) is a promising reductant for water treatment, but rapid oxidation, particle aggregation, and poor transportability restrict its practical use. In this study, n-FeS was immobilized on alkali-modified waste activated sludge (WAS), and xanthan gum (XG) was added as a structural regulator. This approach produced a stable, shear-thinning XG-WAS@n-FeS slurry for the simultaneous removal of Cr(VI) and tetrabromobisphenol A (TBBPA). Carboxyl and hydroxyl groups contributed to the binding of FeS within the XG-WAS matrix, which helped establish a stable reactive interface. The slurry exhibited lower viscosity at higher shear rates, confirming its shear-thinning behavior. Increasing the XG concentration also improved sedimentation stability and oxidation resistance. Cr(VI) was completely removed at all tested concentrations. By contrast, TBBPA removal decreased from 81.93% to 53.19% as the Cr(VI) concentration increased from 20 to 80 mg L −1 . It also decreased from 92.49% to 58.99% when the TBBPA concentration increased from 5 to 20 μM. These concentration-dependent trends reflect the finite reducing capacity of the slurry and the preferential consumption of electrons by Cr(VI). Humic acid, Ca 2+ , Mg 2+ , and Cl − enhanced TBBPA removal to varying degrees, while Cr(VI) removal remained complete. XPS analysis showed that Cr(VI) was reduced and immobilized as Cr(III) species. HPLC-MS analysis revealed the stepwise debromination of TBBPA to BPA. These findings demonstrate that XG-WAS@n-FeS is a stable and effective slurry for treating water containing both Cr(VI) and TBBPA. Download: Download high-res image (190KB) Download: Download full-size image
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Yue Sun,Yuanli Liu,Zimo Lou,Kunlun Yang,Dan Lv,Jiasheng Zhou,Shams Ali Baig,Xinhua Xu
Iron sulfide (FeS) nanoparticles with large specific surface area and abundant pore structure have been recognized as effective Hg(II) adsorbents. However, bare FeS nanoparticles can aggregate easily, which greatly limited their engineering applications. In this study, FeS nanoparticles were stabilized by biomaterials, including sodium carboxymethyl cellulose (CMC), gelatin and starch, and thoroughly investigated for the stabilization effects. Results demonstrated that the three biomaterial stabilized FeS nanoparticles namely CMC-FeS, gelatin-FeS and starch-FeS enhanced the adsorption efficiency significantly. The maximum adsorption capacities of CMC-FeS, gelatin-FeS and starch-FeS (mass ratio of stabilizer to FeS was 1:6) achieved ∼1726 mg/g, ∼1939 mg/g and ∼1989 mg/g respectively, which were over twice of the bare FeS. TEM images suggested that biomaterial-FeS nanoparticles were dispersed more uniformly than bare FeS. The removal processes of the three materials obeyed pseudo-second-order kinetic model ( R 2 ≥ 0.9986), implying that the rate-limiting step was the chemical sorption process. High removal efficiency of biomaterial-FeS nanoparticles was observed in the initial pH range of 6–11. The presence of Cl − could accelerate the reaction process, whereas the presence of humic acid (HA) could inhibit Hg(II) uptake. In addition, high concentration of coexisting cations (30 mM as Cd 2+ , Pb 2+ , Cu 2+ , and Ca 2+ ) had no significant effect on Hg(II) removal.
研究领域:
环境科学
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材料科学
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化学工程
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Dong Cheng,Wenjuan Liao,Songhu Yuan
Interaction of mackinawite (FeS) with O 2 has attracted much attention recently for contaminant transformation due to reactive oxidant production. However, the effect of in situ generated Fe (oxyhydr)oxide coatings on FeS reactivity and the resultant reactive oxidant production remains poorly understood. To clarify this effect, we specially prepared partially oxidized FeS with in situ generated Fe (oxyhydr)oxide coatings, and then stored it in the anoxic environment to explore the interactions between FeS and Fe (oxyhydr)oxide coatings, and characterized the variation of morphology and Fe(II) species by STEM, XRD, Mössbauer spectroscopy and XPS. We found that the reactivity of FeS upon oxygenation and the resultant OH production for phenol oxidation were prominently accelerated after anoxic settling. XRD patterns exhibited the formation of more crystalline Fe (oxyhydr)oxide coatings, Mössbauer spectra identified the generation of a new Fe(II) species, and XPS results revealed the increase in Fe(II) fraction on the surface during anoxic settling. These variations were most probably attributed to the electron transfer between FeS core and Fe (oxyhydr)oxide coatings driven by the redox potential gradient. Our findings deepened the mechanistic understanding of FeS reactivity and the resultant oxidizing impact on contaminant transformation under O 2 -perturbed conditions.
研究领域:
环境科学
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化学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Yan Wang,Ming Liu,Haibing Liu,Junhang Ding,Tian Wang,Jinfeng Dong,Bingbing Wang,Xing Tian,Yanzhi Xia
Search for anode materials for sodium ions batteries (SIBs) attracts researchers around the world because of their high-rate capability and excellent capacity. However, their stability needs to be improved. Thus, this work demonstrates a controllable method for the synthesis of one-dimensional (1D) hollow microfibers using “egg-box-structured” Fe-alginate fibers. The goal was to obtain an SIBs anode material with the optimal number of voids for efficient Na + storage. An optimized micro and pore structures were designed to obtain the shortest Na + -diffusion distance. The novel FeS 2 /Fe 2 O 3 -HF composite was able to withstand volume expansion during charge/discharge processes and showed high specificity and rate capacity (483 mAh/g at 100 mA/g, 241 mAh/g at 2000 mA/g). The capacity retention of this cell was excellent: it maintained 245 mAh/g over four hundred 1000 mA/g cycles. Thus, FeS 2 /Fe 2 O 3 -HF composite is a very promising active anode material for SIBs.
研究领域:
材料科学
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能源存储
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2026
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IF 6.9
Yiming Zong,Chuanyong Yan,Shuya Zheng,Yong'en Shi,Sixi Zhu,Xuefeng Ren,Li Feng
Background Coal gasification fly ash (CGFS) poses severe environmental threats due to its massive discharge, necessitating urgent treatment and valorization. Methods This study developed a facile chemical precipitation method to synthesize CGFS-supported iron sulfide catalyst (FeS@CGFS) for activating persulfate to treat coal chemical wastewater. Significant findings FeS@CGFS exhibited a unique coral-like structure with well-dispersed FeS nanoparticles on CGFS, effectively suppressing aggregation. The catalyst demonstrated exceptional Rhodamine B degradation activity across a broad pH range (3–9), achieving 98.64% removal of 20 mg/L RhB within 10 min under optimal conditions (pH 6, 0.060 g/L catalyst, 0.05 mM potassium persulfate). Mechanistic studies identified sulfate radicals (SO₄•⁻) and hydroxyl radicals (•OH) as primary reactive species. The coral-like structure enhanced pollutant adsorption and electron transfer, while S²⁻ facilitated Fe³⁺/Fe²⁺ cycling to sustain reactive species generation. This work provides a strategic blueprint for the high-value utilization of CGFS, and also offers a representative case for implementing the "waste-treats-waste" strategy and on-site treatment of coal chemical wastewater.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2026
·Vol. 37
·期 9
·672
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IF 3.2
Zheng Jiahong,Wang Binyu,Zheng Xin
In the context of escalating global environmental concerns, the pursuit of highly efficient photocatalysts has emerged as a prominent research focus. In this study, PBA-derived CoS₂/FeS was anchored to b-CNTs through hydrothermal and calcination techniques to serve as a Photo-Fenton-like catalyst. The CoS 2 /FeS/b-CNTs exhibited remarkable photocatalytic Fenton activity. Under xenon lamp irradiation, an impressive degradation efficiency of 97% for RhB was achieved within a mere 210 s, concomitantly exhibiting extensive adaptability across a wide pH range of pollutant solutions. Even after three consecutive cycles and magnetic recovery separation procedures, the degradation efficiency of RhB still remains at a high degradation efficiency of 94.6%. Free radical capture experiments unambiguously indicated that singlet oxygen ( 1 O 2 ) and hydroxyl radicals (•OH) played pivotal roles as the principal active species during the degradation process. This research not only pioneers a novel avenue for the design of PBA-derived layered nanostructured photocatalysts but also holds significant potential for future applications in Photo-Fenton-like degradation of recalcitrant organic pollutants, heralding a new era in environmental remediation technology.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Siyuan Sun,Fan Yang,Xiaoyun Zhang,Jinxiu Qian,Kexin Wei,Junpu An,Yang Sun,Shuyang Wang,Xi Li,Yongfeng Li
Transition metal single-atom catalysts (SACs) have been widely used in oxygen reduction reactions (ORR) and oxygen evolution reaction (OER) due to its greatest atomic utilization and low costs, which catalytic performance can be further enhanced by electron distribution adjustment. Herein, we synthesized a carbon-encapsulated FeS/Fe 3 C nanoparticles doped carbon-based Fe single atom catalyst from fluid catalytic cracking (FCC) slurry though a one-pot pyrolysis. The synergistic effect between FeS/Fe 3 C nanoparticles and Fe single atom structure (FeN x ) promotes the ORR/OER processes, which may due to the reduction of the adsorption free energy of intermediates. Meanwhile, the polyaromatic hydrocarbon in FCC slurry enhances the graphitization of catalyst to facilitate charge transfer in electrocatalysis process, and the carbon-encapsulated nanoparticles sites possess higher stability and dispersion. As a result, the optimized catalyst (FeS/Fe 3 C@Fe-N-C) presents a high nanoparticles dispersion and graphitization level, which has a higher ORR catalytic ability (E 1/2 = 0.91 V vs RHE) compared with commercial Pt/C (20 wt%, E 1/2 = 0.879 V vs RHE) and a similar OER catalytic ability (E 10 = 0.1.506 V vs RHE) compared with RuO 2 (E 10 = 1.518 V vs RHE). A liquid Zn-air battery assembled with FeS/Fe 3 C@Fe-N-C show a peak power density of 113 mW cm −2 and an open potential of 1.432 V. This work sheds light on a new method to design transition metal active sites carbon based single-atom catalyst for enhanced ORR and OER processes.
研究领域:
材料科学
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电化学
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高影响因子
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