APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
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IF 19.503
Meng Li,Jingxue Sun,Gang Chen,Shunyu Yao,Bowen Cong,Pengfei Liu
In order to take full advantage of solar energy, the development of full spectrum photocatalysts have become focus of attention. Herein, the hollow FeS 2 /Bi 2 S 3 is constructed to enhance photocatalytic hydrogen evolution by the synergistic effect of photothermal property and thermoelectric effect. This is the first time to exploit the ΔT between the heat generated by photothermal effect and the cold photocatalytic system to provide driving force for pyroelectric effect. The FeS 2 can make the most of near infrared (NIR) light to thermogenesis and provide hot end for thermoelectric effect of Bi 2 S 3 . Under the environment of circulating condensed water, Bi 2 S 3 will cause spontaneous polarization and generate thermoelectric effect under the influence of temperature difference (ΔT) fluctuation. It releases the charge on the surface, so as to control the migration direction and rate of carriers in FeS 2 nanoparticles. The results of surface work function and COMSOL numerical simulation display that the improvement of photocatalytic efficiency is on account of the lower surface work function and high pyroelectric potential. The hydrogen production efficiency of FeS 2 /Bi 2 S 3 -3 reaches 16.8 mmol g −1 h −1 and has favourable cycle stability. This study provides a new insight for the design and construction of novel full spectrum photocatalysts.
研究领域:
材料科学
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催化化学
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能源科学
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DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2026
·
IF 13.5
Fulin Yang,Runze He,Sneha Mittal,Shuli Wang,Anantharaj Sengeni,Ligang Feng
The advancement of Fe-based oxygen evolution reaction (OER) catalysts lags behind their Ni-based counterparts, albeit their good theoretically predicted performance and low cost. Deeply understanding the catalytic mechanism would be necessary to advance the Fe-based catalysts. Currently, Fe-based non-metallic compounds, such as sulfides, phosphides, and selenides, have been widely explored as highly active OER precatalysts because of their tunable electronic structures and relatively high electrical conductivity. Nevertheless, these precatalysts usually undergo surface reconstruction into oxyhydroxides under OER conditions, making the real active phase different from the pristine compound and complicating the structure-performance relationship. Herein, taking the Ni-doped FeS 2 nanosphere catalyst as a platform, we discover a nuanced bidirectional electronic effect within the surface-reconstructed active phase, showcasing the vital roles of both residual FeS 2 and Ni dopants in optimizing catalytic performance. Structural characterizations confirm the successful incorporation of Ni dopants into the pyrite FeS 2 lattice. An amorphous carbon layer is coated on the sulphide nanospheres, which contributes to improving charge transfer efficiency and maintaining structural integrity during electrocatalysis. As a result, the obtained catalyst, typically denoted as Ni 0.2 -FeS 2 @C, achieves markedly enhanced OER activity in the alkaline electrolyte, requiring an overpotential of only 270 mV to reach 10 mA cm −2 , much lower than those of the undoped and uncoated counterparts (FeS 2 @C and FeS 2 ). Moreover, Ni 0.2 -FeS 2 @C exhibits negligible activity decay after 5000 cyclic voltammetry cycles and remains stable during 100 h of constant-potential operation, with Faradaic efficiency for oxygen production close to 100%, demonstrating good catalytic durability and selectivity. Spectroscopic analyses and density functional theory calculations reveal that surface reconstruction during OER leads to the formation of oxyhydroxide as reported elsewhere, but unique electronic interactions, which have not been observed earlier. On the one hand, the residual FeS 2 substrate upshifts the d -band center of the surface oxyhydroxide, strengthening the adsorption behavior of the crucial oxygenated intermediate. On the other hand, Ni dopants induce a downshift of the d -band center, which weakens over-binding inversely. The resulting bidirectional modulation optimizes the electronic structure of active sites and effectively balances the adsorption strength of OER intermediates, thereby reducing the OER energy barrier. Consequently, this work not only provides a viable strategy for the rational design of Fe-based OER catalysts but also deepens the mechanistic understanding of the real active phase of balanced electronic modulation in enhancing electrocatalytic activity. Surface reconstruction generates an oxyhydroxide active layer on Ni-doped FeS 2 for OER, where the FeS 2 substrate and Ni dopants oppositely regulate the d -band center to optimize oxygen-intermediate binding. Download: Download high-res image (295KB) Download: Download full-size image
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DOI
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Chenguang Wang,Yajing Wang,Qunying Yang,Taiping Xie,Zhongping Yao,Qixing Xia,Jiankang Wang
The unsatisfactory degradation, significant iron leaching and poor recyclability of Fe-based sulfide catalysts for peroxymonosulfate (PMS) activation greatly hinder their wide application. Despite the progress by constructing Fe-based sulfide/carbon composites, the degradation performance is still unsatisfactory and the synergistic mechanism of Fe sites and nitrogen configurations in PMS activation is ambiguous. Herein, using dopamine as C and N source, the magnetic FeS 2 embedded in N doped carbon (FeS 2 @NC) catalyst was prepared by hydrothermal-pyrolytic sulfidation method. The as-synthesized catalyst was systematically characterized by XRD, SEM, TEM, Raman, XPS and BET. The methylene blue (MB) degradation experiment in catalyst/PMS system showed FeS 2 @NC4-500 prepared under 0.4 g sulfur powder and pyrolysis temperature of 500 °C exhibited excellent performance with 94 % MB removal rate within 30 min. The optimal degradation condition was determined to be 0.2 g/L catalyst, 0.3 g/L PMS, 20 mg/L MB and initial pH 7.0. The scavenging experiment of reactive oxygen species (ROS), electron paramagnetic resonance (EPR) and electrochemical measurement confirmed the involvement of sulfate radical (SO 4 · – ), superoxide radical (O 2 · – ) and singlet oxygen ( 1 O 2 ) in MB degradation, but SO 4 · – and 1 O 2 were the major contributors. Combined with the XPS spectra of the fresh and used FeS 2 @NC4-500, the synergistic mechanism with Fe(Ⅱ) and pyrrolic N as active sites for PMS activation was clarified. The degradation intermediates were identified by liquid chromatograph-mass spectrometer (LC-MS) and the possible degradation pathway of MB in FeS 2 @NC4-500/PMS system was proposed. The ecotoxicity of the intermediates was predicted by using the ECOSAR software. This work deciphers the important role of Fe(Ⅱ) and pyrrolic N in PMS activation and can provide a reference for designing highly efficient Fe-based sulfide/N doped carbon hybrid for persistent wastewater remediation.
研究领域:
环境科学
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材料化学
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催化
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水处理
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2019
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IF 4.561
Sultan Ahmed Khoso,Zhiyong Gao,Mengjie Tian,Yuehua Hu,Wei Sun
The depression of pyrite (FeS 2 ) through an organic depressant is not only ineffective but also nonselective which causes poor selectivity . In this research, the depression effect of an organic polymer ‘poly-γ-glutamic acid (γ-PGA, a widely available class of polysaccharides)’ on pyrite flotation was improved by the addition of lime (CaO). The most encouraging flotation results were received at relatively lower concentrations of CaO and γ-PGA. The addition of CaO and γ-PGA had a synergistic inhibitory effect on pyrite flotation with a minor compromise in terms of the chalcopyrite grade at low alkaline conditions (pH 9). Adsorption studies and zeta potential measurements revealed that both CaO and γ-PGA were greatly adsorbed onto the pyrite surface than chalcopyrite. The addition of CaO and γ-PGA underwent a two-step depression effect on pyrite surface: (1) calcium species dissolved from CaO prefrentially adsorbed onto the pyrite surface and decreasing its negative charges; (2) pre-adsorbed calcium hydroxyl species promoted the adsorption of γ-PGA onto the pyrite surface. The XPS and FT-IR measurements revealed that γ-PGA formed the chemical coordination bonds with Ca-species on pyrite surface. Based on these measurement analyses, a two-step depression mechanism of CaO and γ-PGA on pyrite was also proposed. The envisaged scheme has its own benefits of environmental friendliness and cost-effective characteristics in Cu S flotation systems.
研究领域:
矿物加工工程
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环境科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Dawei Song,Yukun Pan,Huan Chen,Yaqin Shi,Yanan Huang,Bo Niu,Donghui Long,Yayun Zhang
Singlet oxygen ( 1 O 2 ) plays a crucial role in environmental catalysis owing to its long lifetime, strong electrophilicity, and high selectivity, whereas selective generation of 1 O 2 with conventional catalysts remains challenges. Herein, we for the first time construct a FeS 2 -FeMoO 4 heterostructure supported on graphene oxide (FeMoS-GO), and subsequently evaluate its efficacy in peroxymonosulfate (PMS) activation for degrading organic pollutants. Compared with non-heterostructures, our catalyst alters the electron density and coordination environment of Fe and Mo, enhancing electron transfer and facilitating the cyclic conversion of Fe 2+ /Fe 3+ during PMS adsorption and activation. Experiments indicate that FeMoS-GO generates nearly 100 % 1 O 2 , with concentrations two to three orders of magnitude higher than those of •OH and SO 4 •- . Density functional theory (DFT) calculations and electrochemical tests also support the high efficiency of electron transfer and PMS adsorption by heterostructure. The degradation for phenol of FeMoS-GO is 100 times faster than that of the non-heterogeneous structure, and its degradation rate for various organic pollutants exceeds 90 %, while also demonstrating satisfactory performance in interference and stability tests. Our findings offer new insights and approaches for the efficient and controlled generation of 1 O 2 in water treatment and environmental remediation.
研究领域:
环境催化
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材料科学
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高级氧化过程
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水处理技术
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多相催化
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2026
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IF 19.9
Shiqiao Liu,Debao Fang,Junlin Yang,Yongliang Shen,Yuefeng Su,Caihong Feng,Ning Li,Chengzhi Wang,Zhiyong Xiong,Haibo Jin,Jingbo Li
Carbon aerogels are highly promising lightweight microwave absorbers, yet their intrinsic brittleness and disordered pore structures significantly limit both mechanical reliability and electromagnetic (EM) performance. Here, a flexible honeycomb-like anisotropic hybrid carbon aerogel (CFMT), modified with MoS 2 /FeS 2 nanoparticles and toughened by a polyurethane network, is developed to overcome these limitations. Benefiting from the aligned quasi-periodic pore architecture, CFMT exhibits a distinct anisotropic electromagnetic response. When incident waves propagate parallel to the honeycomb channels, strong dielectric relaxation is induced, and localized electromagnetic resonance (LEMR) is generated within the pore structure, enabling efficient capture and dissipation of centimeter-wavelength electromagnetic energy. Consequently, the CFMT aerogel delivers an ultrawide effective absorption bandwidth of 11.84 GHz, accompanied by a minimum reflection loss of −50 dB. In addition to excellent microwave absorption, the aerogel also demonstrates robust mechanical flexibility and superior infrared stealth capability. This work explicitly elucidates the mechanism by which quasi-periodic porous structures enhance microwave absorption performance, providing a highly effective design paradigm for next-generation, multifunctional, and flexible electromagnetic wave absorbers.
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DOI
高影响因子
DALTON TRANSACTIONS
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2024
·Vol. 53
·期 45
·18175-18182
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IF 3.5
Weiao Kong,Xiaohan Lin,Chuanhe Wang,Gen Li,Zhiqiang Xue,Shoubing Wang,Yani Zhang,Zhidong Liu,Huanian Zhang,Min Zhang,Wei Ding,Liping Guo,Shugang Tan
In this work, we synthesized composites of ferrous disulfide and tin disulfide with multi-walled carbon nanotubes (MWCNTs) using a straightforward hydrothermal method. The incorporation of carbon nanotubes significantly enhanced the dielectric loss capability of the composites. When the filling ratio of FeS2/SnS2@CNTs (20 wt%) in paraffin was 40%, the effective absorption bandwidth was 3.28 GHz, while the minimum reflection loss (RL) value was as high as −39.2 dB, which corresponded to a thickness of only 1.4 mm. This work reveals the potential research value of this material in terms of thin thickness, strong absorption and light mass.
研究领域:
材料科学
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电磁学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Ruiqi Zhang,Xintong Yao,Xinru Meng,Xinyu Li,Dafeng Zhang,Junchang Liu,Peiqing Cai,Xipeng Pu
To effectively harness solar energy, the rational construction and development of full-spectrum photocatalysts has become an appealing challenge. In this study, a novel full-spectrum responsive FeS 2 /Mn 0.3 Cd 0.7 S (FS/MCS) S-scheme photocatalyst was obtained by attaching FeS 2 nanoparticles with excellent photothermal properties on Mn 0.3 Cd 0.7 S nanorods. The photocatalytic hydrogen production rate of the optimal FS/MCS composite was 52.017 mmol·g −1 ·h −1 under full-spectrum irradiation, which was 3.88 times that of pure MCS. Based on the experimental results and density functional theory (DFT) calculations, the enhanced photoactivity of FS/MCS was attributed to the synergetic effects of photothermal and S-scheme heterojunction. The photothermal effect of FeS 2 could convert the near infrared light to heat, which elevated the local temperature of photocatalyst particles, thereby promoting the photocatalytic reaction. Meanwhile, the S-scheme heterojunction between FeS 2 and Mn 0.3 Cd 0.7 S accelerated the charge transfer and suppressed the recombination of electron-hole pairs, thereby enabling efficient charge separation while maintaining high redox potentials. This work offers a novel perspective on constructing a full-spectrum-driven photothermal-assisted photocatalytic H 2 evolution system though the dual effects of photothermal and heterojunction.
研究领域:
材料科学
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光催化
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可再生能源
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纳米材料
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太阳能转换
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Xiaolei Wu,Hanqing Zhao,Junmin Xu,Ye Wang,Shuge Dai,Tingting Xu,Shengman Liu,Sen Zhang,Xinchang Wang,Xinjian Li
Marcasite FeS 2 hollow microspheres were selectively synthesized by a simple hydrothermal method . Time-dependent evolution reveal that marcasite FeS 2 hollow microspheres is formed attributed to the phase transformation from greigite Fe 3 S 4 into marcasite FeS 2 with Ostwald ripening mechanism. The hollow marcasite FeS 2 exhibits excellent electrochemical performance as the anode of sodium ion batteries (SIBs). Significantly, the FeS 2 (M) hollow microspheres deliver a high specific discharge capacity of 363 mA h g −1 at 100 mA g −1 after 300 cycles. They also still deliver high-rate and long-life performance with a specific discharge capacity of 280 mA h g −1 at a high current density of 1000 mA g −1 after 1000 cycles. Moreover, the high rate capability and long cycling stability of the FeS 2 (M) hollow microsphere electrodes are investigated by the in-depth kinetics analysis. Our results demonstrate the marcasite FeS 2 hollow microspheres would be a promising anode material for SIBs.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Weitian Cai,Fenglian Fu,Lijun Zhu,Bing Tang
The treatment of multi-component pollutants in wastewater is a challenge. In this work, a novel nanoscale magnetite/pyrite (Fe 3 O 4 /FeS 2 ) composite was successfully synthesized, characterized and applied in simultaneous removal of Cr(VI) and phosphate. Transmission electron microscopy , X-ray photoelectron spectroscopy, Vibrating sample magnetometer , Fourier transformed infrared spectroscopy , and X-ray diffraction analysis were applied in characterization of Fe 3 O 4 /FeS 2 composites. The comparative experiments among FeS 2 , Fe 3 O 4 and Fe 3 O 4 /FeS 2 for the removal of Cr(VI) and phosphate were carried out. The Fe 3 O 4 /FeS 2 composite with molar ratio of 1:4 exhibited remarkable performance on the removal of Cr(VI) and phosphate at initial pH 3.0. Compared with bare Fe 3 O 4 , Fe 3 O 4 /FeS 2 exhibited an enhanced removal of Cr(VI). Cr(VI) removal includes electrostatic attraction and reduction. The removal of phosphate was due to electrostatic attraction and the formation of FePO 4 precipitates. The efficient removal of Cr(VI) and phosphate and the great performance of solid-liquid separation show that Fe 3 O 4 /FeS 2 nanocomposite is a promising material for Cr(VI) and phosphate contaminated wastewater treatment.
研究领域:
环境科学
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材料科学
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水处理
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hongwei Ding,Xiaoyan Li,Jingjing Yang,Lin Jin,Xinyu Yang,Xiaowen Kang,Xueliang Liu,Zewen Song,Guoyin Li
Diabetic wounds are refractory and recurrent chronic conditions, characterized by insufficient tissue nutrition, persistent infection, and immune dysregulation. These challenges underscore the need for innovative, multifunctional wound dressings. In this study, we synthesized cobalt-doped FeS₂ (Co-FeS₂) nanozymes that exhibit superior peroxidase (POD)-like and superoxide dismutase (SOD)-like activities, enhanced photothermal performance, and greater antioxidant capacity compared to Fe₃O₄ and FeS₂. The Co-FeS₂ nanozyme was encapsulated together with H₂O₂ in a hydrogel matrix composed of polyvinyl alcohol (PVA)-borax modified with sodium alginate (SA) and tannic acid (TA), resulting in a material with strong skin adhesion, self-healing property, and excellent biodegradability. The incorporated H₂O₂ serves a dual purpose: it regulates the hydrogel's degradation kinetics and provides early-stage antibacterial activity through reactive oxygen species (ROS) generation, while subsequently being catalyzed by Co-FeS₂ to produce oxygen. This oxygen supply, along with ROS scavenging, promotes the polarization of pro-inflammatory M1 macrophages to anti-inflammatory M2 macrophages, thereby resolving chronic inflammation. Both in vitro and in vivo evaluations demonstrated that the composite hydrogel possesses excellent biocompatibility, sustained antibacterial efficacy, antioxidant activity, anti-inflammatory regulation, and pro-angiogenic effects. These findings highlight its potential as a promising wound dressing for diabetic and other chronic wounds, effectively addressing multiple pathological challenges in the healing process.
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产品关联
DOI
PubMed
高影响因子
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
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化学工程
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DOI
高影响因子
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