SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Xiaoguo Shi,Ke Ma,Yawei Gu,Wenqiu Zhang,Jing Sun
Pyrite have been recognized as a promising Fenton reagent to degrade multitudinous organic contaminants. However, the dominating contribution of heterogeneous and homogeneous Fenton reaction to degradation in pyrite Fenton system is ambiguous. In this work, pyrite FeS 2 nanoparticles were newly prepared by a wet ball milling method with iron, sulfur and ethanol without protective gas. A subsequent heat-treatment was used to optimize the pyrite crystallinity. The degradation performance of synthesized FeS 2 Fenton system for sulfadiazine were systematically investigated for the first time. The synthesized FeS 2 Fenton system exhibited ultra-fast and superior degradation ability at wide pH range (3–9) compared with current pyrite Fenton system and 100% sulfadiazine was removed in 4 min with 0.4 g/L FeS 2 , 2.5 mmol/L H 2 O 2 and initial pH of 7. It’s found that ball milling process and heat-treatment affect the performance of synthesized FeS 2 Fenton system. The pH self-adjustment induced by accelerated dissolution of amorphous FeS 2 and the Fe 2+ /Fe 3+ cyclic regeneration ability resulted in the dominating homogeneous Fenton reaction to degrade sulfadiazine. The maintained excellent degradation ability of synthesized FeS 2 after reused three times, in scale-up system, exposed in air for 5 weeks or in real water system (tap water and river water) indicated its promising application possibility and the possible degradation pathways of sulfadiazine by synthesized FeS 2 Fenton system were also proposed.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 52
·期 5
·2442-2451
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IF 2.302
Cheng Shuang,Wang Jian,Lin Hongzhen,Li Wanfei,Qiu Yongcai,Zheng Zhaozhao,Zhao Xinluo,Zhang Yuegang
Transition metal chalcogenides such as FeS 2 are promising electrode materials for energy storage. However, poor rate performance and low cycling stability hinder the practical application of FeS 2 cathode in secondary batteries. In this study, highly pure pyrite FeS 2 nanocrystals (NCs) with octahedral shape and 200–300 nm size have been synthesized via a facile and environmentally benign approach based on a surfactant-free aqueous reaction. Combined with a compatible ether electrolyte, the prepared FeS 2 NCs, despite their dimension far beyond the quantum confined regime, could achieve high utilization and reversibility as a cathode active material due to the well-defined crystal structure and the uncapped rough surfaces. Furthermore, we find that the last charging voltage step of FeS 2 only contributes a minor capacity but caused severe capacity fading due to the formation of soluble polysulfides. By suppressing this step through setting a proper upper cut-off voltage, the cycle life of the Li/FeS 2 cell is dramatically improved. The Li/FeS 2 cell running over a voltage window of 1.0–2.4 V at 1C delivers an initial capacity of 486.1 mA h g −1 , slightly lower than that running over 1.0–3.0 V (561.1 mA h g −1 ), but outperforms the latter substantially after 500 cycles (367 mA h g −1 vs 315 mA h g −1 ), corresponding to a capacity decay rate as low as 0.048% per cycle. Our results provide a meaningful approach for the development of not only the advanced FeS 2 material for long-life rechargeable batteries, but also other transition metal chalcogenide nanomaterials for a variety of potential applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yuanfeng Liu,Yaxin Sun,Min Zhang,Shiquan Guo,Zijing Su,Tingli Ren,Congju Li
The low power density originating from poor electroactive bacteria (EAB) adhesion and sluggish extracellular electron transfer (EET) at the anode interface, is a major impediment preventing the practical implementation of microbial fuel cells (MFCs). Tailoring the surface properties of anodes is an effective and powerful strategy for addressing this issue. In this study, we successfully fabricated an efficient anode electrocatalyst , consisting of carbon nanotubes encapsulating iron disulfide (FeS 2 @CNT) micropolyhedrons, using simple hydrothermal and freeze-drying methods, which not only strengthened the anode interaction with EAB but also promoted the EET process at the anode interface. As expected, the MFCs with a FeS 2 @CNT anode yielded an outstanding power density of 1914 mW m −2 at a current density of 4350 mA m −2 , which significantly exceeded those of pure CNT (1096.2 mW m −2 , 2703.3 mA m −2 ) and carbon cloth (426.8 mW m −2 , 965.6 mA m −2 ) anodes. The high-power output can be attributed to the synergistic effect between FeS 2 and CNTs, endowing the anode with biocompatibility for biofilm adhesion and colonization, nutrient diffusion , and the presence of abundant Fe and S active sites for EET mediation. Owing to the low cost, facile fabrication process, and excellent electrocatalytic performance toward the redox reactions in biofilms, the synthesized FeS 2 @CNT electrocatalyst is a promising material for high-performance and cost-effective MFCs with commercial applications.
研究领域:
环境科学
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材料科学
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电化学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Junxiang Wang,Jie Zhou,Zhihao Yan,Weiwei Zhou,Yuruo Qi,Jianhui Zhu,Maowen Xu,Jian Jiang
Tackling intractable issues of FeS 2 anodes, typically like polysulfide dissolution/shuttle, poor initial Coulombic efficiency (ICE), and severe aerogenesis, is of significance to build practical sodium (Na)-ion hybrid capacitors (SICs). Herein, we propose a smart kinetics-mediated/catalysis-shielding strategy by making selenium (Se)-doped FeS 2 (FeS 1.75 Se 0.25 ) nano solid solutions packaged with thin conformal sulfurized polyacrylonitrile (SPAN) layers. The atomic Se doping aids in regulating FeS 2 electronic structures and strengthening the inherent conductivity, while dense/electrochemical active SPAN shells can avert the polysulfide leakage, smooth Na + diffusion kinetics, and foremost shield catalytic sites to inhibit the adverse electrolyte decomposition/gaseous evolutions. Such SPAN-sheltered FeS 1.75 Se 0.25 anodes demonstrate a remarkable reversible capacity of ∼540 mAh g −1 at a high current density of 10 A g −1 , long-lasting cyclic stability (∼96.8% capacity retention after all cycles), superb ICE as high as 95.5%, and negligible self-discharge phenomena. Systematic in situ examinations are used to unveil the reversible phase-conversion mechanisms, and density functional theory calculations affirm their reduced band gaps and energy barriers. The assembled SICs are able to deliver an impressive energy density of 84.8 Wh kg −1 at 15 kW kg −1 without evident gases evolved upon cycling, and be fully competent as powerful energy suppliers to drive electromagnetic guns.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yaqiong Long,Jing Yang,Xin Gao,Xuena Xu,Weiliu Fan,Jian Yang,Shifeng Hou,Yitai Qian
Transition-metal sulfides/selenides are explored as advanced electrode materials for nonaqueous sodium-ion capacitors, using FeS2–xSex as an example. A solid solution of S/Se in FeS2–xSex allows it to combine the high capacity of FeS2 and the good diffusion kinetics of FeSe2 together, thereby exhibiting excellent cycle stability (∼220 mA h g–1 after 6000 cycles at 2 A g–1) and superior rate capability (∼210 mA h g–1 at 40 A g–1) within 0.8–3.0 V. These results are much better than those of FeS2 and FeSe2, confirming the advantages of S/Se solid solution, as supported by EIS spectra, DFT calculations, and electronic conductivity. As FeS2–xSex is paired with the activated carbon (AC) as Na-ion capacitors, this device is also better than sodium-ion batteries of FeS2–xSex//Na3V2(PO4)3 and sodium-ion capacitors of metal oxides//AC, particularly at high rates. These results open a new door for the applications of sulfides/selenides in another device of electrochemical energy storage.
研究领域:
电化学
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储能技术
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材料科学
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电池技术
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纳米材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Huanyu Liang,Xinyu Wang,Jing Shi,Jingwei Chen,Weiqian Tian,Minghua Huang,Jingyi Wu,Yue Zhu,Huanlei Wang
The means of structural hybridization such as heterojunction construction and carbon-coating engineering for facilitating charge transfer and electron transport are considered viable strategies to address the challenges associated with the low rate capability and poor cycling stability of sulfide-based anodes in potassium-ion batteries (PIBs). Motivated by these concepts, we have successfully prepared a hydrangea-like bimetallic sulfide heterostructure encapsulated in nitrogen-doped carbon (FMS@NC) using a simple solvothermal method, followed by poly-dopamine wrapping and a one-step sulfidation/carbonization process. When served as an anode for PIBs, this FMS@NC demonstrates a high specific capacity (585 mAh g −1 at 0.05 A/g) and long cycling stability. Synergetic effects of mitigated volume expansions and enhanced conductivity that are responsbile for such high performance have been verified to originate from the heterostructured sulfides and the N -doped carbon matrix. Meanwhile, comprehensive characterization reveals existence of an intercalation-conversion hybrid K-ion storage mechanism in this material. Impressively, a K-ion capacitor with the FMS@NC anode and a commercial activated carbon cathode exhibits a superior energy density of up to 192 Wh kg −1 , a high power density, and outstanding cycling stability. This study provides constructive guidance for designing high-performance and durable potassium-ion storage anodes for next-generation energy storage devices.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Xinrui Huang,Jingsong Liu,Mengshi Zeng,Xiaowei Yang,Xiaojiang Liu
In this article, the MgO imporous fibers, MgO porous fibers and hydrofluoric acid (HF) modified MgO porous fibers were researched as the electrolyte binders in Li–Si/LiCl–KCl/FeS 2 thermal batteries respectively. The results show that the wettability between the LiCl–KCl molten salt and the MgO fiber binders increases significantly in order of MgO porous fibers and HF modified MgO porous fibers. The separator pellet using the MgO porous fiber modified by 40 mol% (of the MgO fiber) HF solution as the electrolyte binder exhibits an extremely small amount of electrolyte leakages (19.6 mg cm −2 ) and the highest ionic conductivity (0.66 S cm −1 at 450 °C). Meanwhile, the corresponding thermal battery shows the largest discharge capacity (425 mA h g −1 at 1.0 V voltage plateau). Moreover, the effect of HF modification on the ion migration was analyzed based on the analysis of element diffusion and the formed MgF 2 phase. In summary, modification of MgO porous fiber binder by HF solution is a potential way to improve the performance of thermal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wutao Wei,Xi Jia,Xuyan Qin,Zhikai Wang,Yide Zhang,Fang He,Liwei Mi
Magnesium/lithium-sulfur hybrid batteries (ML-SHBs) are considered to be the strongest candidate to replace lithium-ion batteries (LIBs) due to their high volumetric energy density and dendrite-free. In this study, S@FeS 2 /CoS 2 was prepared on the basis of a hollow, eggshell-shaped construction by using the less-liquid method. In this method, the reactants carry water of crystallization during the reaction to provide a liquid environment, and the metal ions on the surface of the droplets promote the formation of S@FeS 2 /CoS 2 . The configuration of the eggshell facilitates the generation of additional reaction interfaces, thereby expediting the interaction with the electrolyte and facilitating transport processes. This structure promotes efficient charge transfer and accelerates the transport rate. By implementing strategies such as heterostructure building and bimetallic doping, the controllable construction of the morphological structure can be realized. The induced effect of heterostructured interfaces can be excited within the nanocrystals to form an electric field, which effectively reduces the ion diffusion barrier and synchronously enhances the interfacial electron transfer efficiency by modulating the electronic behavior. The discharge specific capacity of the cell was found to be 1096.73 mAh g −1 at a current density of 200 mA g −1 , exhibiting a high rate capacity. The Coulombic efficiency remained at 99.8 % after 100 cycles at a current density of 500 mA g −1 .
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiaofei Fu,Chenyang Zhu,Jitao Yan,Xinru Lu,Zuming He,Yongmei Xia,Wenqian Lian,Qiangshun Wu,Jiali Chen,Jiameng Pu,Tinghai Yang,Yong Gao
The rational design of heterostructure photocatalysts is of great significance for maximizing the synergistic effects from individual material characteristics during photocatalytic processes. Herein, a triple-engineered Bi 4 O 5 Br 2 /FeS 2 heterojunction was successfully developed via a combined calcination–hydrothermal method. The optimized heterojunction (BOB/FS-21) demonstrated a cefalexin degradation rate of 98.6 % within 60 min, and exhibited exceptional performance in the treatment of real pharmaceutical wastewater, effectively reducing the COD from 7852 mg/L to 1987 mg/L. The superior performance was attributed to the following benefits, either directly or indirectly: i) interfacial S − O bonds built specific charge transfer channels, ii) Z -scheme mode optimized the charge transfer path, iii) photothermal-assisted effect accelerated reaction kinetics and suppressed carrier recombination. Experiments, characterizations, and calculations collectively validated these synergistic benefits driving the efficient and active charge transfer process, realizing a unified “three-in-one” functional system. Besides, the breakdown mechanism of cefalexin was investigated by employing mass spectrometry and DFT methods, and a toxicity evaluation of the intermediate products during degradation was carried out using toxicological assessments. Overall, this work establishes a triple-synergy paradigm for the design of advanced heterogeneous photocatalysts toward sustainable antibiotic remediation.
研究领域:
环境催化
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光催化
·
水污染控制
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环境功能材料
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分子生物学
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药物代谢
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毒理学评估
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可持续修复技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Chao Gong,Jinli Zhai,Xi Wang,Wenjie Zhu,Daoli Yang,Yongming Luo,Xiaoya Gao
Herein, a heterogeneous photo-Fenton and photo-catalytic system was constructed using oxide pyrite (FeS 2 /Fe 2 O 3 ) mineral and organic acids including tartaric acid (TA), ascorbic acid (AA), and citric acid (CA). In the proposed system, FeS 2 /Fe 2 O 3 can be successfully activated through irradiation to generate photogenerated carriers, which generated H 2 O 2 in-situ through the reduction reactions between e - and O 2 . The addition of organic acids enhanced the dissolution of iron from FeS 2 /Fe 2 O 3 . Based on the iron and in-situ generated H 2 O 2 , •OH was produced through a photo-Fenton reaction. Furthermore, h + , e - , and •O 2 − , which were generated through the photo-catalytic activation of FeS 2 /Fe 2 O 3 , also played a certain role in the degradation of carbamazepine (CBZ). Therefore, the synergistic photo-Fenton and photo-catalytic reaction improved the degradation of CBZ, with the degradation efficiencies of 86%, 62%, and 68% in FeS 2 /Fe 2 O 3 /TA, FeS 2 /Fe 2 O 3 /AA, and FeS 2 /Fe 2 O 3 /CA systems, respectively. This investigation provides an innovative strategy for the removal of organic pollutants using natural minerals.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Mingxing Hu,Hanmin Zhang,Yu Tian
An innovative partial nitrification and short-cut sulfur autotrophic denitrification (PN-SSAD, NH 4 + -N → NO 2 − -N → N 2 ) coupled system in a single-stage SBR was proposed to treat low C/N wastewater with low material and energy consumption. Nearly 50 % alkalinity consumption and 40 % sulfate production were reduced in S 0 -SSAD compared with S 0 -SAD, whereas the autotrophic denitrification rate was increased by 65 %. In S 0 -PN-SSAD, the TN removal efficiency reached almost 99 % without additional organic carbon. Furthermore, pyrite (FeS 2 ) rather than S 0 served as the electron donor to optimize the PN-SSAD process. The practical sulfate production in S 0 -PN-SSAD and FeS 2 -PN-SSAD were about 38 % and 52 % lower than complete nitrification and sulfur autotrophic denitrification (CN-SAD), respectively. Thiobacillus was the major autotrophic denitrification bacteria in S 0 -PN-SSAD (34.47 %) and FeS 2 -PN-SSAD (14.88 %). Nitrosomonas and Thiobacillus played a synergistic effect in the coupled system. FeS 2 -PN-SSAD is expected as an alternative technology for nitrification and heterotrophic denitrification (HD) in treating low C/N wastewater.
研究领域:
环境工程
·
微生物学
·
水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Chuxin Deng,Ningning Zhang,Jinrong Sun,Zifan Li,Mengjie Li,Shilei Xie,Shoushan Wang,Faliang Cheng
Zinc–air batteries are considered one of the most promising batteries for energy storage owing to their low cost, high safety, and high energy density. Developing effective bifunctional electrocatalysts is one of the important issues for zinc–air batteries. Although Fe2N demonstrates oxygen reduction activity comparable to that of Pt-based catalysts, its relatively poor catalytic activity for oxygen evolution and limited exposure of active sites still restrict its application. Herein, we report on the rational design and synthesis of FeS2 and Fe2N nanostructures on sulfur- and nitrogen-codoped carbon nanotubes as effective and ultrastable bifunctional electrocatalysts. The highly dispersed FeS2 and Fe2N nanostructures on CNTs provide numerous active catalytic sites, and the introduction of FeS2 improves the electronic structure and charge distribution of the electrocatalysts, significantly reducing the Gibbs free energy for rate-determining steps in the oxygen evolution reaction. The carbon nanotubes here can also accelerate the transportation of electrons and oxygen molecules, as well as enhance the stability of the electrocatalysts. Consequently, it achieved impressive oxygen reduction activity with a half-wave potential of 0.765 V vs RHE and a low overpotential of 0.46 V for the oxygen evolution reaction at a current density of 10 mA cm–2, respectively. Moreover, the homemade zinc–air battery based on the FeS2–Fe2N/SN-CNTs air-cathode can deliver a maximum power density of 119.2 mW cm–2. This study introduces a novel approach to the design of dual-function catalysts and zinc–air batteries.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米材料
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）