CHEMOSPHERE
·
2021
·
IF 7.086
Youru Yao,Xin Hu,Yong Zhang,Huan He,Shiyin Li
Ferrous sulfide (FeS) and humic acid (HA) are typical black substances in black bloom water. Based on the strong reduction ability of FeS and the photosensitivity of HA, the transformation of toxic organic pollutants by the combination of FeS and HA (HA-FeS) is not clear. In order to explore this issue, the stability of HA-FeS was analyzed by measuring the hydrodynamic diameter and zeta potential of HA-FeS, and then the removal mechanism and possible degradation pathway of tetrabromobisphenol A (TBBPA) by HA-FeS under continuous illumination were discussed. The results showed that the hydrodynamic diameter of FeS was reduced and the stability of FeS was improved, and it was easily suspended after FeS combined with the HA in the water. The combination of HA and FeS promoted the removal of TBBPA in water, no matter it was in the presence or absence of light. Besides, compared with the absence of light, the removal efficiency of TBBPA was improved by HA-FeS with continuous light. There were two reasons for the increase in the removal efficiency of TBBPA by HA-FeS. On the one hand, Fe 2+ and S 2− of HA-FeS had more stable chemical valence and obtained better reducibility under continuous light than that in the dark. On the other hand, light induced the release of active species ( O 2 − , 1 O 2 , and OH) in the HA-FeS composite colloid and further promoted the degradation of organic pollutants. Therefore, the black substances (FeS) of black blooms may play a beneficial role in the removal of pollutants under sunlight.
研究领域:
环境科学
·
污染控制
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DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Siyu Jin,Yuhua Xie,Hongyuan Xu,Yanping Luo,Jing Li,Weiwei Cai,Hui Xu,Hong Jin
The sluggish redox reactions and the shuttle effect associated with lithium polysulfides significantly impede the advancement of LSBs. To solve these problems, we synthesized CoS-FeS heterostructures supported by N-doped carbon nanocage (CoS-FeS@NC). The kinetic analysis shows that the enriched heterojunctions strengthens the bonding of host with polysulfides, thus promotes the redox reaction kinetics of polysulfides. XPS analysis reveals valence state of cobalt is elevated following incorporation of iron. This increase is attributed to the transfer of electrons from Co 2+ /Co 3+ to Fe 3+ . The configuration of the cationic valence electrons drives this electron transfer, which in turn improves the catalytic efficiency of the CoS-FeS@NC composites. Leveraging these advantages, the S@CoS-FeS/NC cathode demonstrates an exceptional ability to adsorb lithium polysulfides (LiPSs), along with rapid reaction kinetics and enduring stability in cycling (reversible capacity of 638 mAh g −1 at 0.2 C after 200 cycles). Remarkably, even when subjected to a charge/discharge rate as high as 1 C, the cathode sustains a capacity of 619 mAh g −1 and it keeps 542 mAh g −1 at 1 C after 1000 cycles at a degradation rate of merely 0.05 % for each cycle. This offers a feasible strategy to thoughtfully fabricate bimetallic sulfide heterostructures and fosters advancements in various electrochemical energy storage and conversion applications.
研究领域:
材料科学
·
电化学能源存储与转换
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DOI
高影响因子
CARBON
·
2026
·
IF 12.7
Xueyang Wang,Jiaxin Yao,Yi Luo,Bo Niu,Zhe Su,Donghui Long
Ion-exchange resin serve as dual sulfur/carbon sources for C/FeS/Fe 3 O 4 . • Sulfur vacancies and heterointerfaces synergistically boost polarization loss. • Synergistic dielectric-magnetic loss mechanisms yield RL min of −69.2 dB. • Flexible C/FeS/Fe 3 O 4 -silicone rubber plate shows excellent application potential. Transition metal sulfide (TMS)-based composites have shown great promise for microwave absorption, yet achieving high attenuation and broadband absorption simultaneously remains a critical challenge. Herein, ion-exchange resin is innovatively employed as a dual source of sulfur and carbon to prepare a magnetic C/FeS/Fe 3 O 4 composite rich in sulfur vacancies, which achieves synergistic dielectric-magnetic dissipation for efficient electromagnetic wave (EMW) absorption. The preparation involves a simple process of ion exchange, physical adsorption and carbonization, during which FeS and Fe 3 O 4 are generated in situ on the resin-derived porous carbon skeleton. The abundant sulfur vacancies, heterogeneous interfaces, and three-dimensional conductive network synergistically enhance dipole polarization, interfacial polarization and conductive loss. Moreover, the ferromagnetic Fe 3 O 4 component contributes to magnetic loss. These synergistic dielectric-magnetic loss mechanisms endow C/FeS/Fe 3 O 4 composite with both excellent attenuation capacity and favorable impedance matching. Consequently, the composite delivers outstanding EMW absorption performance, exhibiting a minimum reflection loss (RL min ) of −69.2 dB at a thickness of 1.65 mm and an effective absorption bandwidth (EAB) of 5.1 GHz at 1.50 mm. Radar cross-section (RCS) simulations demonstrate that C/FeS/Fe 3 O 4 can significantly suppress radar-wave scattering, achieving a maximum RCS reduction of 28.0 dB m 2 . Furthermore, the composite shows excellent application potential when incorporated into a flexible, heat-dissipating, microwave-absorbing C/FeS/Fe 3 O 4 -silicone rubber plate. This work provides valuable insights into the rational design and fabrication of high-performance TMS-based EMW absorbers. Download: Download high-res image (445KB) Download: Download full-size image
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高影响因子
ACS Applied Energy Materials
·
2026
·
IF 5.5
Lingxin Yu,Shicai Xiao,Lina Han,Xiaoyuan Zeng,Yi Xie,Baolong Li,Yudong Sui,Yingjie Zhang,Peng Dong
The modification of TMS nanocrystals on highly conductive carriers (e.g., carbon black, graphene, carbon nanotubes) is an effective strategy to adjust the electronic structure and enhance the exposure of active sites, thereby achieving high-performance bifunctional electrocatalysts. In this study, a simple one-step pyrolysis strategy was employed to anchor FeS particles on a nitrogen-doped carbon electrocatalyst (FeS/NC). It was demonstrated that the use of NC as a carrier enriched the morphological structure, enhanced the specific surface area and graphitization degree, and thereby provided more active sites. More importantly, the strong electronic interaction between FeS and NC is suggested to optimize the free energy between reaction intermediates and adsorption sites, as well as the d-band center of FeS/NC, leading to a 0.19 V higher onset potential than that of pristine FeS. FeS/NC exhibited outstanding bifunctional oxygen catalytic performance for both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) (ΔE = 0.87 V), superior to that of FeS and NC. Furthermore, rechargeable zinc-air batteries based on FeS/NC demonstrated a high peak power density (144.08 mW·cm–2), high specific capacity (716.74 mAh·gZn–1), high energy density (724.62 Wh·kgZn–1), and excellent stability.
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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2016
·
IF 5.393
Dong Cheng,Songhu Yuan,Peng Liao,Peng Zhang
Mackinawite (FeS) nanoparticles have been extensively tested for reducing contaminants under anoxic conditions, while the oxidizing impact induced by FeS under oxic conditions has been largely underestimated. In light of previous findings that hydroxyl radicals (·OH) can be produced from oxygenation of sediment Fe(II), herein we revealed that ·OH can be produced efficiently from FeS oxygenation at circumneutral conditions, yielding 84.7 μmol ·OH per g FeS. Much more ·OH was produced from the oxygenation of FeS compared with siderite, pyrite, and zerovalent iron nanoparticles under the same conditions. The oxidation of FeS was a surface-mediated process, in which O2 was transformed by the structural Fe(II) on FeS surface to ·OH with the generation of H2O2 intermediate. A small proportion of Fe(II) was regenerated from the reduction of Fe(III) by FeS and S(-II), but this proportion did not significantly contribute to ·OH production. We further validated that the ·OH produced from FeS oxygenation considerably contributed to the oxidation of arsenic. As the change of redox conditions from anoxic to oxic is common in both natural and artificial processes, our findings suggest that the oxidizing impact induced by FeS at oxic conditions should be concerned due to ·OH production.
研究领域:
环境科学
·
化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xianli Yang,Jingnan Yang,Xuran Liu,Sheng Gong,Xiaodi Ji,Jianmin Chang,Chenxi Li,Qinyi Pan,Dongbo Wang
Maximizing resource recovery by improving the anaerobic treatment efficiency of waste activated sludge (WAS) is critical to reducing carbon emissions. In this study, a concept of “co-treating” WAS with sulfite-laden wastes (sulfite) and mackinawite (FeS) was proposed to improve the anaerobic fermentation performance of WAS. Experimental results showed that the maximal short-chain fatty acids (SCFAs) yield of 2461.4 mg COD/L and corresponding acetate proportion (55.9 %) were obtained with a sulfite/FeS ratio of 0.8 at 500 mg S/L sulfite . It was found that •OH, SO 4 •- , . O 2 , and 1 O 2 free radicals produced by FeS/sulfite pretreatment could decompose the sludge flocs significantly, resulting in reduced particle size and viable cell ratio, thereby providing more available organics for SCFAs production. Mechanism investigations revealed that FeS/sulfite pretreatment enhanced the production of SCFAs by increasing key hydrolytic enzymes, improving the abundance of microorganisms related to hydrolysis and acidification and altering the functional traits of the corresponding microbes. FeS/sulfite pretreatment also facilitated the conversion of propionate and butyrate acid to acetate during anaerobic fermentation, probably due to FeS/sulfite-induced iron reduction and sulfate reduction. The GC–MS results suggested that FeS/sulfite pretreatment promoted the quality of the fermentation mixture by decreasing the refractory compounds. This work provided a practical approach to the final disposal of WAS with added economic and environmental value.
研究领域:
环境科学
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微生物学
·
污水处理
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2019
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IF 6.669
Jingde Ma,Haizhen Wu,Yixian Wang,Guanglei Qiu,Bingbing Fu,Chaofei Wu,Chaohai Wei
For wastewaters containing high strength sulfide and nitrogen (e.g. coking wastewater), sulfide might be precipitated and recovered using ferrous salt. This study systematically investigated the feasibility of recovered and precipitated FeS (comparing to commercial FeS minerals) to support autotrophic denitrification for advance nitrogen removal from bio-treated coking wastewater in fluidized bed reactors. The reactor with precipitated FeS could achieve simultaneous removal of NO 3 − -N and inert COD with high efficiencies of around 96.3% and 30.5%, at NO 3 − -N and COD loading rates of 4.18 mg·L −1 ·h −1 and 8.06 mg·L −1 ·h −1 , respectively. Whereas, the performance of commercial FeS reduced gradually and irreversibly after two days, which became completely ineffective after 40 days. Thiobacillus and Rhodanobacter dominated the biomass, which played a key role in the FeS-based denitrification process. This material inter-recycling concept benefits an advance and more sustainable treatment of wastewaters with high strength sulfide and nitrogen.
研究领域:
环境工程
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水处理
·
微生物学
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Peicheng Huang,Weichun Yang,Varney Edwin Johnson,Mengying Si,Feiping Zhao,Qi Liao,Changqing Su,Zhihui Yang
The contamination of soils by mercury (Hg) seriously threatens the local ecological environment and public health. S-functionalized amendments are common remediation technology , yet, Hg re-activation often occurs in the commonly used immobilization remediation by S-functionalized amendments, resulting in an unsatisfactory remediation effect. In this study, a novel FeS–Se functionalized biochar composite (FeS-Se-BC) amendment was prepared and applied for the efficient remediation of Hg-polluted soil. An immobilization efficiency of 99.62% and 99.22% for H 2 O-extractable Hg and TCLP solution-extractable Hg was achieved with the application of FeS-Se-BC (0.05) after 180 d. The analyses of XPS, Hg-TPD, SEM-EDS demonstrated that excellent remediation performance by FeS-Se-BC resulted from the synergistic effect of FeS and Se to form HgS and HgSe concurrently. In comparison to the treatments of biochar and FeS-functionalized biochar (FeS-BC), FeS-Se-BC promoted the transformation of exchangeable, carbonate-bound, and Fe–Mn oxides-bound Hg fractions into organic material-bound, and residual fractions, effectively reducing the risk of Hg-contaminated soil from a highly dangerous level to a low risk. Furthermore, the introduction of Se clearly inhibited the re-activation of Hg and reduced the release of Hg by 81.12% compared to FeS-BC when the ratio of S 2− to Hg was 5: 1 due to the formation of extremely stable HgSe. These results suggest that FeS-Se-BC has good potential for remediation of Hg-polluted soils which provides a new inhibitory idea for Hg re-activation after immobilization.
研究领域:
环境科学
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土壤修复
·
化学工程
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Duogui Wu,Rong Li,Yunlong Shi,Yun Li,Mei Yang,Yanyue Xiao,Meiyao Wu,Chunhua Wang,Changjiang Yu,Shuwen Wang
In the present study, sodium alginate (SA) was employed as the precursor and cross-linked with Fe3+ ions to form an SA–Fe3+ hydrogel. In an alkaline Na2S solution, the prepared hydrogel gradually released Fe3+ ions, which subsequently reacted with S2− ions to produce a uniformly dispersed alginate-FeS/S hybrid sol (denoted as SA-FeS/S). The SA-FeS/S sol was then converted into an FeS/FeSn carbon cryogel (BC@FeS/FeSn-T, where BC stands for biochar) through sequential freeze-drying and pyrolysis. The microstructure and composition of the resulting BC@FeS/FeSn-T cryogel were systematically characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The performance for the adsorption of Cr(VI) and the corresponding reaction mechanism of BC@FeS/FeSn-700 were thoroughly investigated. Moreover, BC@FeS/FeSn-700 exhibited superior Cr(VI) removal efficiency over a wide pH range, making it a highly promising candidate for remediating Cr(VI)-contaminated soils. The adsorption process proceeded via five distinct pathways: (i) Cr(VI)'s reduction by Fe2+ and HS− species released from FeS; (ii) direct electron transfer from FeS; (iii) redox reactions with various iron sulfides (FeS2, Fe3S4, and Fe1−xS); (iv) reduction by sulfite ions; and (v) surface adsorption onto biochar or metal oxides.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 16
·7155-7161
·
IF 9.931
Mingbao Huang,Anding Xu,Huanhuan Duan,Songping Wu
To meet heavy-duty applications for LIBs, development of superior electrode materials with high-efficiency lithium-storage capability has become very crucial and urgent. Herein, a simple one-pot method has been developed for the synthesis of a reduced graphene oxide-wrapped FeS nanoflake (FeS@rGO) composite using oleylamine as a solvent, reductant, and surfactant. The as-prepared FeS@rGO composite as an anode material for LIBs showed excellent cycling ability and rate performance, i.e., reversible capacities of 887 mA h g−1 at the current density of 200 mA g−1 after 150 cycles, 662 mA h g−1 at 1.0 A g−1 after 200 cycles, and 325 mA h g−1 at 5.0 A g−1 even after 1000 cycles. These enhanced electrochemical performances can be attributed to the unique cladding structure, in which rGO can act as a protective coating to accommodate volume changes of FeS upon Li-cycling and offer a fast electron transfer channel. A two-dimensional sheet structure also facilitates Li+ ion diffusion in active electrode materials. More importantly, the enhanced extrinsic pseudocapacitance can promote the charge transfer rate and afford significant Li-storage capacity, thereby promoting the rate capability of a material at large current densities. Therefore, as a promising anode with high power density and long lifespan, this composite has shown its distinct potential and advantage for heavy-duty LIBs.
研究领域:
材料科学
·
电化学
·
纳米能源材料
·
储能技术
·
先进电池
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DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Jujun Yuan,Meiqi Mu,Xijun Xu,Yunfei Gan,Haishan He,Xianke Zhang,Xiaokang Li,Fanguang Kuang,Haixia Li,Jun Liu
The three-dimensional (3D) FeS@N doped Carbon (NC) nanosheets are successfully synthesized using a simple sol-gel method followed by a solid sulfidation process. As SIBs anode, the 3D FeS@NC nanosheets exhibit a maintainable capacity (254 mAh g −1 at 1.5 A g −1 upon 1100 cycles) and outstanding rate behaviour. As PIBs anode, the 3D FeS@NC nanosheets also exhibit a maintainable capacity (120 mAh g −1 at 1 A g −1 upon 1100 cycles) and outstanding rate behaviour. The excellent electrochemical performance can be attributed to the distinctive 3D porous FeS@NC nanosheets, which can inhibit the aggregation and pulverization of FeS, enhance electronic/ionic conductivity, firmly immobilize the dissolved polysulfides , and provide a larger contact area between active materials and electrolytes. Moreover, the N-doped carbon framework can also provide substantial active sites for Na + (K + ) storage. Our synthesizing strategy can be potentially utilized for fabricating other 3D metal sulfide@C composites for SIB (PIB) anodes.
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DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 37
·13052-13058
·
IF 4.39
Hui Zheng,Changhao Ding,Han-Shu Xu,Lulu Tang,Huimin Liu,Lianwei Wei,Kaibin Tang
Several FeS-derived intercalated compounds (C2H8N2)xFeS and Ax(C2H8N2)yFeS (A = Li, Na) were successfully synthesized via a novel ammonothermal method. The powder X-ray diffraction (XRD) measurements reveal that the FeS intercalated samples have the same tetragonal crystal structure as the parent FeS. After intercalation, these three as-synthesized samples do not show superconductor behavior, which is confirmed by the magnetization and the electrical resistivity measurements. (C2H8N2)xFeS exhibits paramagnetic semiconductor behavior, while the newly synthesized Ax(C2H8N2)yFeS (A = Li, Na) shows antiferromagnetic semiconductor behavior. The absence of superconductivity in these FeS-derived compounds should be closely related to the iron vacancies in the FeS layer.
研究领域:
材料科学
·
固体化学
·
凝聚态物理
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DOI
高影响因子
危险品化学品经营许可证（带存储）