CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zunqing Wen,Xiaoguo Shi,Huiying Sui,Minglu Zhang,Longquan Zhang,Yawei Gu,Qing Feng,Ke Ma,Na Zhang,Mingzhe Wang,Ruiyan Zhang,Chongqing Xu,Zengjin Li,Rong Xue
Numerous studies have revealed that air oxidation behavior profoundly impacts pyrite properties. Whereas its influence on pyrite Fenton performance remains controversial. Herein, pyrite FeS 2 nanoparticles synthesized by facile wet-mechanochemical method was employed as oxidation model and its oxidation degree was evaluated by XPS depth profiling technique. Based on theoretical calculation and experimental evidence, the properties and Fenton performance of surface oxidized pyrite (SOP x ) were comprehensively assessed. With oxidation degree increase, free radical generation selectivity was alternated from •O 2 – to •OH, and the selectivity to •OH showed strong correlations with {210} facet ratio, Fe(Ⅱ)-O and sulfur vacancies (SVs) contents. The oxidation degree dependence in •OH selective production primarily stemmed from different electron-donating and Fe 2+ releasing capacity. Moderately oxidized pyrite (SOP 4 ) with high {210} facet ratio, SVs and Fe(Ⅱ)-O contents could donate electrons for H 2 O 2 barrierless dissociation and Fe 2+ /Fe 3+ redox-cycle, and cause more Fe 2+ releasing to enhance homogeneous Fenton reaction. As the oxidation degree increased (from SOP 0 to SOP 4 ), the Fenton systems demonstrated a significant enhancement in sulfadiazine (SDZ) degradation kinetics, with the rate constant increasing from 0.02039 to 0.06904 min −1 . The superior SDZ removal efficiency in SOP 4 system at wide pH range (5–9) indicated moderate oxidation significantly improved its decontamination and practical application ability. However, the amorphous iron oxide layer generated in the over-oxidized pyrite (SOP 6 ) impaired its catalytic activity, resulting in a decrease of the rate constant (0.0485 min −1 ). These findings unveiled the mystery of Fenton performance regulated by FeS 2 oxidation via {210} facet, SVs and Fe(Ⅱ)-O, and offered fresh insights into developing targeted structures for tunable performance.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Hong-Hong Fan,Huan-Huan Li,Ke-Cheng Huang,Chao-Ying Fan,Xiao-Ying Zhang,Xing-Long Wu,Jing-Ping Zhang
Marcasite (m-FeS2) exhibits higher electronic conductivity than that of pyrite (p-FeS2) because of its lower semiconducting gap (0.4 vs 0.7 eV). Meanwhile, as demonstrates stronger Fe–S bonds and less S–S interactions, the m-FeS2 seems to be a better choice for electrode materials compared to p-FeS2. However, the m-FeS2 has been seldom studied due to its sophisticated synthetic methods until now. Herein, a hierarchical m-FeS2 and carbon nanofibers composite (m-FeS2/CNFs) with grape-cluster structure was designed and successfully prepared by a straightforward hydrothermal method. When evaluated as an electrode material for lithium ion batteries, the m-FeS2/CNFs exhibited superior lithium storage properties with a high reversible capacity of 1399.5 mAh g–1 after 100 cycles at 100 mA g–1 and good rate capability of 782.2 mAh g–1 up to 10 A g–1. The Li-storage mechanism for the lithiation/delithiation processes of m-FeS2/CNFs was systematically investigated by ex situ powder X-ray diffraction patterns and scanning electron microscopy. Interestingly, the hierarchical m-FeS2 microspheres assembled by small FeS2 nanoparticles in the m-FeS2/CNFs composite converted into a mimosa with leaves open shape during Li+ insertion process and vice versa. Accordingly, a “CNFs accelerated decrystallization–recrystallization” mechanism was proposed to explain such morphology variations and the decent electrochemical performance of m-FeS2/CNFs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xin-ya Bu,Yan-li Zhu,Cong-jie Wang,Wei Li,Yu Xia,Yong Zhao
Thermal batteries are solid-state, thermally activated batteries with long storage times and high reliability. FeS2 is used as a cathode material commonly, but the high internal resistance and low voltage platform limit the improvement of battery performance. Herein, the 1T-phase vanadium disulfide (VS2) is prepared via the scalable hydrothermal method and applied to thermal battery cathode materials for the first time. 1T-VS2 lamellar flower clusters have high electronic conductivity (1.583 S cm–1) at room temperature, which is 75 times higher than FeS2 (0.021 S cm–1). Mechanism analysis shows that 1T-VS2@V2O3 can be formed based on the part of 1T-VS2 being oxidized to V2O3 at the discharge temperature. Benefiting from the synergistic effect of vanadium sulfide and vanadium oxide as a cathode for thermal batteries enhanced specific capacity (292.4 mA h g–1) and mass energy density (572.5 W h kg–1) when cutoff voltage is 1 V. Additionally, the discharge results indicate that the cells utilizing 1T-VS2 cathodes provided a higher voltage platform of 2.11 V than 1.84 V for FeS2. This impressive work can offer a good strategy for boosting cathode materials for a high-performance thermal battery.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Jianmei Yang,Qianhong Chen,Ruo Yuan,Yun Xiang
Dysregulation expression of microphthalmia-associated transcription factor (MITF), a principal melanocyte controller, has been closely linked to melanin-associated disorders, and developing highly sensitive MITF detection methods is therefore imperative for early diagnosis and prognosis monitoring of melanoma-associated symptoms. This work describes an ultrasensitive electrochemical MITF biosensor on the basis of highly catalytic FeS2@CoS2 core/shell nanocubes and target recycling/bipedal DNA walker signal amplification cascades. The FeS2@CoS2 nanocubes are prepared with the one-step simple hydrothermal means, followed by their modification on the electrode, electrodeposition of AuNPs, and immobilization of DNA capture probes to prepare the sensing interface. Target MITF molecules bind and protect the dsDNA recognition duplexes from digestion by exonuclease III (Exo III) to trigger subsequent target recycling/bipedal DNA walker reaction cascades. This leads to confining a lot of ferrocene (Fc)-modified DNAs to the electrode sensing surface. FeS2@CoS2-mediated catalytic oxidation of Fc thus generates significantly amplified current signals, achieving MITF detection across 0.5 ∼ 1000 pM with the remarkable 0.12 pM detection limit. Moreover, such a biosensor shows excellent selectivity and can realize trace MITF detection in cancer cell nuclear extracts, demonstrating its potential as a universal platform for trace transcription factor detection.
研究领域:
电分析化学
·
生物传感器与生物电子学
·
纳米材料
·
分子诊断
·
基因调控
·
癌症标志物
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 7
·期 3
·991-997
·
IF 9.931
Jianhao Lu,Fang Lian,Liangliang Guan,Yuxuan Zhang,Fei Ding
Volume changes, polysulfide shuttle effects, and low Li-ion/electronic conductivity of sulfide electrodes limit their application in Li-ion batteries with high-energy density. Here, micron FeS2 particles with bifunctional carbon nanotubes (FeS2@B–CNTs) including CNT internal conductive networks and external protective cages were prepared by a one-step solvothermal method. The internal CNTs anchor FeS2via chemical binding, which much more effectively inhibited the shuttle effect than physical confinement alone. Meanwhile, reticular CNT cages were generated on the surface of the composite FeS2 micron particles, buffering volumetric changes during cycling and further restraining the shuttle of polysulfides. Additionally, a three-dimensional CNT framework offered a primarily continuous charge transfer pathway. The FeS2@B–CNTs electrode had a high initial coulombic efficiency of 91.3% and delivered a capacity of 698 mA h g−1 over 500 cycles at 1000 mA g−1. The Li-ion diffusion coefficient is two orders of magnitude higher than those of previous reports, which improved the rate performance of the FeS2@B–CNTs electrode. These studies on micron FeS2 spheres shed light on the design strategies for the application of sulfide electrodes.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Beibei Zhao,Jingchun Tang,Honghong Lyu,Feng Liu,Lan Wang
Low molecular weight organic acids with low cost and environmentally friendly characteristics can enhance the electron transfer between materials and contaminants. In this study, oxalic acid (OA), citric acid (CA), and ethylenediaminetetraacetic acid (EDTA) were selected to strengthen ball milled natural FeS 2 /biochar composite (FeS 2 /biochar) for aqueous Cr(VI) removal. 100% of Cr(VI) was removed when 5 mM of OA and 0.25 g·L −1 FeS 2 /biochar were used together. In contrast, the removal rate of Cr(VI) by the individual FeS 2 /biochar and OA was 57.9% and 6.3%, respectively. The experimental and characterization results suggested that OA was adsorbed on the surface of FeS 2 /biochar through the conjugated structure of pine biochar, thereby enhancing the dissolution rate of Fe(II) and S(-II) in the FeS 2 /biochar composite, and facilitating the conversion of Fe(II), S(-II), and Cr(VI) to Fe(III), SO 4 2- , and Cr(III), respectively. In addition, the complexation of OA with Fe(III) and Cr(III) reduced the formation of Fe(OH) 3 and Cr(OH) 3 , exposing more surface active site of FeS 2 /biochar for the reduction of Cr(VI). As an electron donor , the addition of OA enhanced the electron transfer process of FeS 2 /biochar to Cr(VI) on the one hand, and on the other hand promoted the redox cycle of Fe(II) through the electron transfer between OA and Fe ions . FeS 2 /biochar showed better stability even after 5 cycles (in 5 mM OA system). The present study demonstrated the promise of low molecular weight organic acids in strengthening materials for environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122408
·
IF 7.5
Shan Huang,Jiangxue Luo,Tianren Zhan,Yubo Wu,Jiankun Li,Yanjuan Zhang,Zuqiang Huang,Huayu Hu,Tao Gan
Iron-based catalysts have been widely used to activate peroxymonosulfate (PMS) for the treatment of carbamazepine (CBZ) wastewater. However, the development of efficient and stable pyrite (FeS 2 )-based catalysts to mitigate the consumption of Fe 3 + /Fe 2+ and S 2 2– is still challenging. Herein, FeS 2 /nitrogen-doped carbon (FeS 2 /NC) composite was synthesized using hydrothermal combined with pyrolytic strategy, wherein FeS 2 and NC connected by Fe−N x and Fe−C x bonds. In the photo-PMS system, FeS 2 /NC achieved a removal rate of 98.2 % for CBZ within 6 min, and the total organic carbon (TOC) removal was 83.4 %, which exceeded FeS 2 and most of the results reported in the previous literature. The electron paramagnetic resonance results and quenching experiments confirmed that 1 O 2 played a critical role in the FeS 2 /NC + PMS + visible light system, while h + , SO 4 • − , and •O 2 − were secondary. The excellent performance stemmed from that the Fe−N x and Fe−C x bonds between FeS 2 and NC enhanced the photogenerated electron transport efficiency, resulting in efficiently circulating Fe 3+ to Fe 2+ and minimizing the S 2 2– consumption. Meanwhile, the electron-deficient graphitic-N could facilitate the 1 O 2 generation. Moreover, FeS 2 /NC exhibited good stability and satisfactory universality, providing the potential for actual wastewater treatment. This work offers a novel strategy for enhancing the Fe 3+ /Fe 2+ cycle and reducing the S 2 2– consumption of FeS 2 -based catalyst for the effective treatment of CBZ wastewater.
✓ 已验证
DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
Zuming He,Kai Lin,Ngie Hing Wong,Jaka Sunarso,Yongmei Xia,Xiaofei Fu,Bin Tang,Zhengyi Huang,Yong Wang,Hanpei Yang
The pyroelectric effect and electron spin-state reconfiguration play a critical role in photocatalysis but are seldom investigated. This work is the first to exploit the fluctuating temperature (Δ T ) between the cold-hot alternation in photocatalysis to drive the pyroelectric effect and electron spin-sate reconfiguration. FeS 2 /CuCo 2 O 4 (FS/CCO) hollow core-shell heterojunctions were prepared using hydrothermal and heating treatment methods. The FeS 2 (FS) can generate heat under near-infrared (NIR) light to provide the elevated temperature end required for the pyroelectric effect of CuCo 2 O 4 (CCO) under the influence of Δ T . With this thermoelectric and pyroelectric effect, CCO can release surface charges, generating spontaneous polarization, changing the electron (e g ) filling number on Co surface sites, reversing the spin electron state, thus controlling the carriers' migration direction and enhancing their separation and migration rate, and finally prolonging their lifetime. As a result, the as-designed FS/CCO-15 composites yielded up to 19.5 mmol g −1 h −1 extraordinary photocatalytic performance, i.e., 10.2 and 6.45-fold of the pure FS (1.92 mmol g −1 h −1 ) and CCO (3.02 mmol g −1 h −1 ) under simulated sunlight, respectively. It also yielded up to 19.8% average apparent quantum yield. This work thoroughly explored the distinctive impact of the pyroelectric effect, electron spin-state reconfiguration, orbital coupling effect, and hydrogen evolution, guiding us and creating more possibilities for photocatalytic technology and efficiency using NIR light.
研究领域:
材料科学
·
光催化技术
·
能源转换与存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Cholnam Ri,Fengxiang Li,Hyokchol Mun,Linan Liu,Jingchun Tang
The technology of integrating sulfidated zero-valent iron and functional anaerobic bacteria has been extensively explored to improve the removal efficiency of pollutants and enhance the performance of anaerobic microbial system. In this study, the simultaneous DCNB(2,4-dichloronitrobenzene) reduction and methane production by ball-milled 1:1 Fe 0 /FeS 2 (briefly, 1:1 Fe 0 /FeS 2 ), Shewanella oneidensis MR-1 and microbial consortium (MC) were firstly investigated. The result showed that the DCNB reduction was increased by 2.6 and 1.7 times in 1:1 Fe 0 /FeS 2 + MR-1 group compared to 1:1 Fe 0 /FeS 2 and MR-1, respectively, while it further increased by almost 2 times in 1:1 Fe 0 /FeS 2 + MC + MR-1 group as compared to that of 1:1 Fe 0 /FeS 2 + MR-1 group. Moreover, the methane production was drastically facilitated via the reciprocal interaction among FeS as the reaction product, MR-1 and MC. Dechlorination was not found, mainly due to the inability of 1:1 Fe 0 /FeS 2 and the inexistence of dechlorinating bacteria in original inoculum. Meanwhile, the microbial community was also changed, with genera like Eubacterium capable of reducing nitroaromatic compound and Methanosarcina as acetoclastic methanogen enriched by 1:1 Fe 0 /FeS 2 and MR-1. Therefore, fast DCNB reduction and methane production using 1:1 Fe 0 /FeS 2 in anaerobic microbial system, gives useful reference for both establishment of pollutant removal and biogas production. In conclusion, Fe 0 /FeS 2 , as a kind of sulfidated ZVI, is a good candidate for enhancing both pollutant degradation and CH 4 production in anaerobic wastewater treatment.
研究领域:
环境工程
·
微生物学
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·Vol. 37
·期 45
·e08212
·
IF 26.8
Yeping Xie,Feng Jiang,Mingle Qiu,Zhongyu Li,Muhan Cao,Wei Sun,Binglei Jiao,Panpan Xu,Qiao Zhang,Jinxing Chen
Transition metal-catalyzed chemical upcycling of polyester waste into monomers represents a critical pathway to mitigate the global environmental crisis posed by plastic pollution. However, reconciling atomic-scale catalyst design with industrial manufacturing demands remains a fundamental challenge for addressing the >80 million tons of polyester waste generated annually. Here, a solar-driven glycolysis platform is reported using thermally activated natural pyrite minerals (FeS 2 ) as photothermal catalysts. Unlike conventional catalysts requiring complex synthesis, this mineral-derived system leverages low-cost, abundant raw materials, a green synthesis process, and easy scale-up. The activated pyrite exhibits a monomer yield 51.2-fold higher than pristine pyrite. Structural and mechanistic studies reveal that thermal activation generates iron-sulfur cooperative sites via topological transformation, which synergistically enhance the adsorption of polyester and ethylene glycol, boosting the subsequent nucleophilic substitution depolymerization reaction. The findings may catalyze innovations in polymer regeneration technologies and establish scalable pathways for plastic waste valorization, accelerating global transition to circular economies.
研究领域:
材料科学
·
环境化学
·
聚合物回收
·
催化
·
可持续能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2025
·
IF 4.2
Huan Tang,Jiaxin Liang,Yangzi Shangguan,Hong Chen
Reduction and stabilization of hexavalent chromium (Cr(VI)) in groundwater are essential for mitigating environmental and human health risks. In this work, we demonstrate the development of FeS2/Re-ANA composites (PM/RAs), a multifunctional material that integrates the chemical and photochemical reduction function within FeS2 with the ion-exchange capacity of the red soil-converted ANA type of zeolites for effective reduction and stabilization of Cr(VI) in groundwater. The PM/RA-3 composite material obtained an impressive Cr(VI) removal rate of 98.90% in a solution with 1 mg L−1 Cr(VI), reducing the residual concentration to 0.011 mg L−1, which complies with the WHO standards for drinking water quality. A detailed mechanistic investigation reveals that FeS2 facilitates both chemical and photoreduction of Cr(VI) to Cr(III), which is subsequently either adsorbed onto the FeS2 surface or immobilized through an ion-exchange process within the zeolite microporous channels. Furthermore, fixed-bed column studies using groundwater samples contaminated with Cr(VI) from a chromate production facility double confirmed the material's effectiveness in meeting discharge standards under environmentally relevant water conditions. This work highlights the potential of employing FeS2/Re-ANA composites as a promising material for treating Cr(VI)-polluted groundwater in permeable reactive barriers, offering a significant advancement for the control of the widespread Cr(VI)-contaminated groundwater pollution.
研究领域:
环境科学
·
水污染控制
·
土壤修复
·
环境化学
·
功能材料
·
地下水治理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Jiahao Li,Hai Sun,Qixi Duan,Dehua Wang,Zhaolong Fang,Zhenyu Zhu,Yan Liang,Yanxing Yang,Yong Yang
The unsatisfactory kinetics of oxygen evolution reaction (OER) severely limits water splitting efficiency, while the prohibitive cost and limited availability of noble metal catalysts constrain their practical applications. Although pyrite-type transition metal sulfides have shown promise as alternative OER catalysts in recent years, their poor intermediate adsorption capacity and low electrical conductivity hinder OER performance improvement. This work presents a density functional theory (DFT)-guided strategy to develop pyrite FeS 2 nanocrystals with active (111) crystal planes, which are further combined with two-dimensional (2D) Ti 3 C 2 T x MXene nanosheets to construct a sandwich-structured FeS 2 /MXene/FeS 2 heterojunction. We demonstrate that the heterojunction exhibits superior OER activity in alkaline environments, requiring a low overpotential of 217 mV to achieve a current density of 10 mA cm −2 . By precisely controlling the exposure of active (111) crystal planes, the distribution of surface adsorption active sites is optimized, significantly enhancing the adsorption capacity of Fe active sites toward OER intermediates and refining the energy barrier of the reaction. Furthermore, the combination of 2D MXene forms Ohmic contact interface with FeS 2 , which further reduces the reaction energy barrier by optimizing interfacial electron transfer, particularly lowering the energy barrier for *OOH formation in the rate-determining step (RDS). Additionally, the novel sandwich structure and in-situ formation of surface-active FeOOH endow the heterojunction with excellent stability during OER testing. This work not only elucidates the critical role of crystal planes engineering in enhancing the OER performance of pyrite-type transition metal sulfides, but also offers a new perspective of thinking for designing OER electrocatalysts through the synergy of active crystal planes and Ohmic heterojunction construction.
研究领域:
电催化
·
材料科学
·
能量转换
·
计算化学
·
纳米材料
✓ 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）