COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Miao Lei,Jun Zhang,Junhang Huang,Junpeng Guo,Chang Liu,Bolin Li,Ye Li
It is of great strategic value for the recovery of uranium resources in seawater. In this work, Fe 3 S 4 /Fe 7 S 8 was synthesized by hydrothermal method to extract the radioactive nuclides of U(Ⅵ). Results of batch experiment discovered that Fe 3 S 4 /Fe 7 S 8 exhibited good U(Ⅵ) removal performance in a wide pH response range, and also had satisfactory selectivity towards uranyl ions even in the presence of co-existing ions (such as K + , Na + , Mg 2+ , Ca 2+ , Cl - , SO 4 2- ). At the temperature of 25°C and pH of 9, the adsorption achieved equilibrium after 120 min with the maximum adsorption capacity of 257.07 mg/g. In addition, the 5 successive adsorption-regeneration experiment and the real seawater experiment of trace U(Ⅵ) adsorption implied that Fe 3 S 4 /Fe 7 S 8 had outstanding reusability and practical application potential in U(Ⅵ) extraction. XRD results showed that the magnetic adsorbent was composed of Fe 3 S 4 and Fe 7 S 8 , with a high crystallinity and stable structure. The ratio of iron to sulfur was close to 7:8 according to semi-quantitative results of SEM-EDS . Further characterization analysis of FTIR and XPS revealed that the removal mechanism of Fe 3 S 4 /Fe 7 S 8 towards U(Ⅵ) mainly included the complexation of S(-Ⅱ), and the reduction of S 2− , S 2 2- and Fe(Ⅱ).
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
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2020
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IF 7.216
Na Cheng,Xiaoyan Chen,Lushuang Zhang,Zhigang Liu
Finding easy-to-operate strategy to obtain anode material with well-designed structure and excellent electrochemical performance is necessary to promote the development of the future potassium-ion batteries (PIBs). In this work, we synthesized reduced graphene oxide doping flower-like Fe 7 S 8 nanosheets electrode materials using one-step hydrothermal strategy. The rGO@Fe 7 S 8 composite is composed of homogeneous Fe 7 S 8 and reduced graphene oxide thin nanosheets. This unique structure not only promotes the penetration of electrolyte and increases the conductive of the pure Fe 7 S 8 electrode materials, but also relieves the volume expansion of K + during charge/discharge process. When applied this interesting anode electrode for PIBs, the rGO@Fe 7 S 8 exhibits excellent electrochemical performance. It delivers a high reversible specific capacity of 445 mAh g −1 at 50 mA g −1 , excellent rate performance (284 mAh g −1 at 500 mA g −1 and 237 mAh g −1 at 1000 mA g −1 ), and a high cycling stability at 100 mA g −1 (maintained 355 mAh g −1 after 300 cycles).
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 20
·9403-9414
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IF 4.682
Fan Lei,Xu Zhilong,Sun Peizheng,An Lanfang,Han Jie,Guo Rong
Bacterial infection is a growing threat to public health worldwide. Ferrous ions have been proved to have good antibacterial properties. However, ferrous ions are easy to be oxidized, which limited its further application. Therefore, the design of nanosystems that can stably release ferrous ions is highly desirable. Here, N-doped hollow carbon nanospheres anchored with Fe 7 S 8 nanosheets (N-HCNs@Fe 7 S 8 ) were synthesized by a hydrothermal method. The particle size, crystal form, and specific surface area of the synthesized composites were characterized. N-HCNs@Fe 7 S 8 can release Fe 2+ ions, which could kill Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) without using light or H 2 O 2 . Fe 2+ concentration increases with the prolonged soak time of N-HCNs@Fe 7 S 8 , and the antibacterial ability is closely related to Fe 2+ concentration. The Fe 2+ released by N-HCNs@Fe 7 S 8 has a promoting effect on the healing of skin wounds infected with S. aureus . The proinflammatory cytokines (TNF-α and IL-6) were effectively reduced in N-HCNs@Fe 7 S 8 -treated wounds, and N-HCNs@Fe 7 S 8 could effectively inhibit inflammation. Therefore, the Fe 2+ release effect of N-HCNs@Fe 7 S 8 and its good biocompatibility make it a candidate material for antibacterial therapy and promoting wound healing. Graphical abstract
研究领域:
材料科学
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微生物学
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医学
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DOI
高影响因子
Batteries & Supercaps
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2021
·Vol. 5
·期 1
·e202100203
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IF 7.093
Yaqian Dong,Yaohui Zhang,Nana Wang,Guifu Zou,Qiang Zhang,Shengquan Gan,Liang He,Zhongchao Bai
Graphical Materials for better SIB anode : The synergistic effects of the one-dimensional N-doped carbon and ultra-small Fe 7 S 8 particles in the reported pod-like Fe 7 S 8 @N−C nanocomposite, improve electrical conductivity and alleviate the volume expansion of the anode of SIB during cycling. One dimensional Fe 7 S 8 @N−C nanocomposite, consisting of Fe 7 S 8 nanoparticles homogeneously embedded in N-doped carbon nanowires, was synthesized by a facile hydrothermal-annealing process. As an anode material for sodium-ion batteries, the electrode exhibited capacities of 481 mA h g −1 after 1000 cycles at 5 A g −1 and 591 mA h g −1 at 200 mA g −1 with a retention ratio of 91 %. The excellent rate performance and cycling stability can be attributed to the synergistic effects of the one-dimensional N-doped carbon and ultra-small Fe 7 S 8 particles, which will improve electrical conductivity and alleviate the volume expansion of the electrode during cycling. This work will afford a great reference for further development of iron sulfides-based anode materials towards high-performance sodium-ion batteries.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Xiangfei He,Chao Peng,Lijuan Yue,Xiuli Han,Han Chen,Chunli Guo,Lichun Xu,Jianli Shao,Meiqing Guo
Due to its high reversible capacity, Fe 7 S 8 has emerged as a promising anode material for sodium-ion batteries (SIBs). However, its application is limited by slow reaction kinetics and significant volume expansion during the charging and discharging process, resulting in poor rate capacity and reduced cycling stability. To address these issues, a novel high-temperature gas-expansion method is proposed to uniformly incorporate Fe 7 S 8 nanoparticles into N and S co-doped porous carbon (Fe 7 S 8 @NSC). It effectively reduces the volume expansion of Fe 7 S 8 and improves its electron/ion conductivity. As a result, when used as an anode material in SIBs, Fe 7 S 8 @NSC demonstrates excellent rate performance, delivering a capacity of 500.0 mAh/g at a current density of 5 A/g. Additionally, it exhibits remarkable stability, maintaining 99.83 % of its capacity after 600 cycles at the same high current density.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2018
·Vol. 24
·期 65
·17339-17344
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IF 5.16
Yu-Jiao Zhang,Wei Chang,Jin Qu,Shu-Meng Hao,Qiu-Yu Ji,Zhi-Guo Jiang,Zhong-Zhen Yu
Graphical Dual confinement : Fe 7 S 8 nanoparticles dually confined by both reduced graphene oxide (RGO) and in-situ-formed amorphous carbon (C) were fabricated as Li-ion battery anodes (see figure). The dual-carbon-confined structure prevents pulverization of the solid electrolyte interface film, increases the local concentration of intermediate phases, makes the electrochemical catalytic conversion reaction occur easily, and ensures fast transfer of electrons and increased transport of lithium ions. Although the electrochemical catalytic conversion process is effective in increasing the reversible capacity of lithium-ion batteries, the low contact efficiency between metal catalyst and substrate and pulverization of the solid electrolyte interface (SEI) film without protection are not beneficial for the electrochemical reactions. Herein, Fe 7 S 8 nanoparticles are confined by both reduced graphene oxide (RGO) and in-situ-formed amorphous carbon (C) to form dual-carbon-confined Fe 7 S 8 as a lithium-ion anode. The dual-carbon-confined structure provides a confined space to prevent pulverization of the SEI film and increases the local concentration of intermediate phases, which could be electrocatalytically decomposed by Fe nanoparticles formed in situ to increase the reversibility of the electrochemical reactions and gain high reversible capacity. In addition, the dual-carbon-confined structure ensures fast transfer of electrons and boosts transport of lithium ions due to the highly conductive dual-carbon shell. Thus, the Fe 7 S 8 /C/RGO anode delivers an excellent rate performance and long cycling stability. At current densities of 2000 and 5000 mA g −1 , the reversible capacities are 520 mA h g −1 over 1500 cycles and 294 mA h g −1 over 2000 cycles, respectively.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Xiaolei Wu,Hanqing Zhao,Junmin Xu,Zhuangfei Zhang,Weixia Sheng,Shuge Dai,Tingting Xu,Sen Zhang,Xinchang Wang,Ye Wang,Xinjian Li
Searching for low-cost, high capacity, stable and well-designed cathode materials with good rate capability and long-life cycling performances is our long-term goal for rechargeable lithium/sodium batteries . In this work, a simple and scalable strategy is developed to synthesize metal-organic frameworks (MOFs) derived Fe 7 S 8 /C composites by sulfurizing Fe-MIL-88A MOFs. The synthesized Fe 7 S 8 /C composites are of rod-like morphology with the well-dispersed Fe 7 S 8 nanoparticles in porous carbon matrix. Such a structure could offer distinct advantages for Fe 7 S 8 -based electrode materials for both lithium and sodium batteries . When evaluated as a cathode material for rechargeable Fe 7 S 8 /Li batteries , the Fe 7 S 8 /C composites exhibit a long and flat discharge plateau around 1.5 V and delivers a high specific discharge capacity of 473 mA h g −1 at 0.1 A g −1 after 100 cycles with excellent rate capability and long-life cycling performance at high current density (~301 mA h g −1 after 1000 cycles at 1.0 A g −1 ). Moreover, the Fe 7 S 8 /C composites could also exhibit high specific capacities, good rate performance and high cycling stability as an anode material for sodium ion batteries. Our findings demonstrate that Fe 7 S 8 /C composites with rod-like morphology are promising electrode materials for lithium/sodium batteries.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Shangying Qin,Li Huang,Chuang Wen,Zhongwei Lin,Yilin Wang,Xin Shu
By using Fe 7 S 8 nanosheets (NSs) as catalyst, O -phenylenediamine (OPD) as chromogenic substrate, H 2 O 2 as oxidant, and ascorbic acid (AA) as regulator, a dual ratio colorimetric and fluorescence sensing system for determining AA was constructed. The inherent peroxidase like activity of Fe 7 S 8 NSs enables it to catalyze the oxidation of OPD in the existence of H 2 O 2 , resulting in the formation of yellow-colored 2, 3-diaminophenazine (DAP) with a characteristic absorption peak at 450 nm and a fluorescence emission peak at 560 nm. However, the presence of AA could suppress the oxidation of OPD and induce the generation of quinoxaline derivative (QXD) 3-(dihydroxyethyl) furo [3,4-b] quinoxaline-1-one with absorption and fluorescence emission peaks located at 345 and 435 nm, respectively. Thus, employing the absorption of QXD at 345 nm and emission at 435 nm as the reporting signals, and the absorption of DAP at 450 nm and emission at 560 nm as the reference signals, a ratio colorimetric ( A 345 / A 450 ) and ratio fluorescence ( F 435 / F 560 ) dual signal detection method for AA was developed. Under the optimized conditions, the value of A 345 / A 450 was found to be linear with AA concentration in the ranges of 1.0–40 μM and 40–100 μM, and the value of F 435 / F 560 was strongly correlated with AA concentration in the ranges of 1.0–30 μM and 30–100 μM. When applied for the assay of AA in human serum samples, an acceptable recovery ranging from 93.1 to 106.6 % was obtained, confirming the potential of the sensing system in practical applications.
研究领域:
分析化学
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生物传感
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医学检测
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
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2023
·Vol. 13
·期 25
·17428-17435
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IF 3.9
Xiaoyu Wang,Wen Wang,Jixin Yao,Qingxiao Zhang,Xin Gao,Changcheng Lin,Qun Yang,Xueqin Zuo,Shaowei Jin,Guang Li
Dye-sensitized solar cells (DSSCs) can directly convert solar energy into electricity, and have aroused great research interest from researchers. Here, the spherical Fe7S8@rGO nanocomposites were expediently fabricated by facile methods, and applied in DSSCs as counter electrodes (CEs). The morphological features show the porous structure of Fe7S8@rGO, and it is beneficial to enhance the permeability of ions. Reduced graphene oxide (rGO) has a large specific surface area and good electrical conductivity, shortening the electron transfer path. The presence of rGO promotes the catalytic reduction of I3− ions to I− ions and reduces the charge transfer resistance (Rct). The experimental findings show that the power conversion efficiency (PCE) of Fe7S8@rGO as CEs for DSSCs can reach 8.40% (20 wt% for rGO), significantly higher than Fe7S8 (7.60%) and Pt (7.69%). Therefore, Fe7S8@rGO nanocomposite is expected to be an efficient and cost-effective CE material for DSSCs.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Xiao Zhang,Jiankang Wang,Yahui Wang,Zhongping Yao,Wanqian Guo,Hongbo Xu,Zhaohua Jiang
The enhancement of electron transport process on multiple channels of C−Fe and C−S−Fe bonds between dual-reaction centres was investigated for stimulating the antibiotics degradation in Fenton-like processes. Herein, multiple channels structure of sulfur-doped carbon coupled Fe 7 S 8 cluster through C−Fe bond and C−S−Fe bond was constructed through density functional theory (DFT), and S-doped carbon framework coated Fe 7 S 8 nanoparticles (Fe 7 S 8 /SC) Fenton-like catalyst was prepared through hydrothermal and subsequent sulfuration process. The DFT calculations revealed that electrons are thermodynamically transferred from carbon to iron along both C−Fe and C−S−Fe bonds. The optimized Fe 7 S 8 /SC catalyst exhibited desirable catalytic property for Fenton-like degradation for various antibiotics, the removal of amoxicillin, norfloxacin, and tetracycline hydrochloride reach 98.9%, 97.8%, and 99.3% respectively within 40 min under neutral pH, and catalyst also demonstrated excellent cycle stability after five runs. The excellent degradation effect of antibiotics by Fenton-like catalyst was attributed to the intensified electron transport process by multiple electron transfer channels between dual reaction centres, making Fe II easier to regenerate. This study spreads a new route for the enhancement of electron transport process in Fenton-like catalysts by constructing multiple channels.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Shu Zhu,Shangying Qin,Chonghui Wei,Li Cen,Luyun Xiong,Xingyu Luo,Yilin Wang
Background Organophosphorus pesticides (OPs) play important roles in the natural environment, agricultural fields, and biological prevention. The development of OPs detection has gradually become an effective strategy to avoid the dangers of pesticides abuse and solve the severe environmental and health problems in humans. Although conventional assays for OPs analysis such as the bulky instrument required analytical methods have been well-developed, it still remains the limitation of inconvenient, inefficient and lab-dependence analysis in real samples. Hence, there is an urgent demand to develop efficient detection methods for OPs analysis in real scenarios. Results Here, by virtue of the highly efficient catalytic performance in Fe 7 S 8 nanoflakes (Fe 7 S 8 NFs), we propose an OPs detection method that rationally integrated Fe 7 S 8 NFs into the acetylcholine (ACh) triggered enzymatic cascade reaction (ATECR) for proceeding better detection performances. In this method, OPs serve as the enzyme inhibitors for inhibiting ATECR among ACh, acetylcholinesterase (AChE), and choline oxidase (CHO), then reduce the generation of H 2 O 2 to suppress the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) that catalyzed by Fe 7 S 8 NFs. Benefiting from the integration of Fe 7 S 8 NFs and ATECR, it enables a sensitive detection for OPs ( e.g. dimethoate). The proposed method has presented good linear ranges of OPs detection ranging from 0.1 to 10 μg mL −1 . Compared to the other methods, the comparable limits of detection (LOD) of OPs are as low as 0.05 μg mL −1 . Significance Furthermore, the proposed method has also achieved a favorable visual detection performance of revealing OPs analysis in real samples. The visual signals of OPs can be transformed into RGB values and gathered by using smartphones, indicating the great potential in simple, sensitive, instrument-free and on-site analysis of pesticide residues in environmental monitoring and biosecurity research.
研究领域:
分析化学
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环境科学
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生物技术
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农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Fengyue Zhao,Juan Xiao,Shipeng Geng,Yi Wang,Panagiotis Tsiakaras,Shuqin Song
Fe 3+ /Fe 2+ interconversion is one of the key factors for heterogeneous electro-Fenton degradation of organic pollutants. In this study, MIL-101Fe-derived carbon wrapping Fe 7 S 8 nanocomposite (Fe 7 S 8 /C-1-600) exhibits outstanding rhodamine B (RhB) degradation ability with extremely low iron leaching and high recyclable degradability within 60 min in a wide pH range. Moreover, Fe 7 S 8 /C-1-600 presents a much higher activity for RhB degradation than Fe 3 O 4 counterpart without sulfidation, which could be mainly attributed to the accelerated Fe 3+ /Fe 2+ cycling by iron with both multiple valences (Fe 0 , Fe 2+ , and Fe 3+ ) and sulfur species (S 2− and S 2 2− ) of the catalyst. The enhancement of H 2 O 2 adsorption and activation into OH on Fe 7 S 8 surface is confirmed by density functional theory calculations with respect to that on Fe 3 O 4 . Interestingly, SO 4 · − can be generated by reacting S 2 2− with dissolved O 2 and subsequently converted into ·OH, which further facilitates RhB degradation. These findings may shed a new insight into the potential application of metal sulfides for wastewater treatment.
研究领域:
环境科学
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化学工程
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材料科学
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水处理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）