Nanomaterials
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2019
·Vol. 9
·期 3
·402
·
IF 4.034
Hongyu Wang,Chaohai Wang,Junwen Qi,Yubo Yan,Ming Zhang,Xin Yan,Xiuyun Sun,Lianjun Wang,Jiansheng Li
Prussian blue and its analogues (PBA) based nanomaterials have been widely applied to removing pollutants in the recent years. However, easy aggregation and poor recycling largely limit their practical applications. In this work, spiderweb-like Fe-Co Prussian blue analogue/polyacrylonitrile (FCPBA/PAN) nanofibers were prepared by electrospinning and applied to degrading bisphenol-A (BPA) by activating peroxymonosulfate (PMS). Detailed characterization demonstrated that a high loading of FCPBA (86% of FCPBA in FCPBA/PAN) was successfully fixed on the PAN nanofibers. 67% of BPA was removed within 240 min when 500 mg·L−1PMS and 233 mg·L−1FCPBA/PAN were introduced in 20 mg·L−1BPA solution at initial pH of 2.8. Electron paramagnetic resonance (EPR) and radical inhibition experiments were performed to identify the possible degradation mechanism. For comparison, a low loading of FCPBA nanofibers (0.6FCPBA/PAN nanofibers, 43% of FCPBA in FCPBA/PAN) were also prepared and tested the catalytic performance. The results showed that the activity of FCPBA/PAN was much higher than 0.6FCPBA/PAN. Furthermore, a FCPBA/PAN packed column was made as a reactor to demonstrate the reusability and stability of FCPBA/PAN nanofibers, which also exhibited the bright future for the industrial application. This work makes it possible to fabricate efficient PBA nanocatalysts with excellent recyclability and promotes the application of PBA in industrial areas.Keywords:Fe-Co Prussian blue analogues;electrospinning;peroxymonosulfate;BPA
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Molecular Catalysis
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2019
·
IF 2.938
Qi Song,Rui Ran,Jiancai Ding,Xiaodong Wu,Zichun Si,Duan Weng
Porous ceria nanorods modified with Fe or Co were prepared via a hydrothermal method. The structural properties, catalytic activities for the total oxidation of propane, and catalytic mechanisms of these materials were systematically investigated by X-ray diffraction, Raman spectroscopy, N 2 adsorption–desorption, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, catalytic activity measurements and in situ Fourier transform infrared spectroscopy. Co-modified ceria exhibited the best catalytic activity during propane oxidation as well as enhanced reducibility due to the synergistic interactions between the Co and the CeO 2 support. Variations in the activating ability and reducibility of the catalysts resulted in the formation of distinctive intermediates during the catalytic process, and this explained the observed differences in catalytic performance.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Ruting Huang,Peidong Ma,Yeyin Zhang,Kaiming Chen,Liping Wang,Ranran Wang,Xianyang Shi,Ying Yu
The enrichment efficiency during the high-value conversion of carbon dioxide still presents certain limitations in practical applications. Iron-cobalt-based metal-organic framework (MOF) nanoparticles, which exhibit lower toxicity to Microcystis aeruginosa , have been successfully introduced into microalgae solutions to address the issue of low CO 2 concentration in interfacial reactions. When 1,4-naphthalenedicarboxylic acid was employed as an organic ligand under synthesis conditions of 130°C, pH 3.5, and a reaction time of 15 h, the resulting MOF exhibited a CH₄ yield of 92.6 μmol g⁻¹ h⁻¹ in the photocatalytic system at room temperature (25°C). The combination of Microcystis aeruginosa with the optimal Fe-Co-MOFs system achieved a selectivity of up to 96.1 % in converting CO 2 into CH 4 . When Microcystis aeruginosa was cultured in a modified medium with a pH of 6.78 and 5 mg of NDC-T130 at 25°C for 12 h, an OD 600 of 0.192 ± 0.01 was observed. The CH₄ yield from the Microcystis aeruginosa -NDC-T130 co-culture composite system was 1.46 times that of the Fe-Co-MOFs. Density-functional theory calculations indicate that carbon dioxide molecules preferentially adsorb on the crystal surfaces of (CoFe 2 )O 4 (113) and (Co 0.457 Fe 0.543 )(Co 1.543 Fe 0.457 )O 4 (311), with the Co site being more likely to serve as the reactive site for CO 2 photoreduction to CH 4 within the Fe-Co-MOFs. Transcriptome analysis demonstrates that MOFs enhance the dark reactions of microalgae and facilitate further CO 2 fixation for photosynthesis and electron transfer, which are crucial for improving the high-value CO 2 conversion efficiency of this system. This strategy provides both experimental and theoretical support for iron-based MOFs as photocatalytic materials, regardless of CO 2 concentration.
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Processes
·
2024
·Vol. 12
·期 9
·1879
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IF 2.8
Huiying Yang,Xiangchao Meng
The conversion of nitrogen (N2) and water (H2O) into NH3by photocatalysis under ambient conditions has been considered an environmentally friendly strategy. However, developing effective catalysts for N2fixation is still challenging. Herein, we report a bimetallic JH Fe, Co/TiO2derived from NH2-MIL-125(Ti) by the fast Joule heating (FJH) method for visible–light–driven catalytic N2fixation. It was found that the photocatalytic N2reduction efficiency of bimetallic FC@TiO2-JH was improved, enabling an NH3yield rate of 110.14 µmol g−1h−1without any sacrificial agents. Furthermore, the rate was higher than those of Fe@TiO2-JH and Co@TiO2-JH, suggesting that the synergistic effect between Fe and Co broke the electronic equilibrium and increased the center of its d-band, enhancing electronic feedback to the antibonding π* orbitals of N2while weakening the bonding energy of N≡N. Meanwhile, the rate was about 2.75 times higher than that of FC@TiO2-TF, which was calcined in a tube furnace. It is assumed that FJH might lead to the formation of lattice defects, leading to localized charge deficiency, enhanced carrier separation, and transport. Thus, doping of Fe and Co synergistically interacted with the defects produced from FJH, facilitating the photocatalytic reduction process. As detected, it had a greater ability to separate hole–electron pairs and transferred electrons to adsorbed N2at faster rates. Our work demonstrates a prospective strategy for designing bimetallic catalysts derived from NH2-MIL-125(Ti) for N2fixation.
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Heliyon
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2024
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IF 3.4
Lijuan Feng,Jie Liu,Shizhao Wang,Yingying Zhao,Fei Li,Xiaofu Guo,Junsheng Yuan
Sulfite oxidation is critical for the stable operation of desulfurization process and the treatment & recovery of desulfurization by-products. The Fe and Co oxides modified super hydrophobic layer was prepared on tubular ceramic membranes using hydrothermal synthesis and surface modifications to realize the combination of the membrane catalysis and membrane aeration. These two oxides were approximately two-layer distributed on the membrane surface, among which the Fe 2 O 3 located in the bottom layer and the Co 3 O 4 located in the upper layer. The catalytic rate of the bifunctional membrane was about 5.8 times than that of the original ceramic membrane, which was decreased with the increasing of Fe/Co ratio and declined after an initial rise with the increase of urea and cetyltrimethylammonium bromide. The conjoint effect of Fe and Co could improve the catalytic performance and reduce the dissolution loss of catalyzer. The oxidation rate tended to be constant after a 15 % decrease in 7 times experiments.
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International Journal of Electrochemical Science
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2024
·
IF 1.3
Qijing Zhang,Kaijie Liang,Zhengri Shao,Jinguang Liang,Baoyi Ren
This article has been retracted: please see Elsevier Policy on Article Withdrawal ( https://www.elsevier.com/locate/withdrawalpolicy ). This article has been retracted at the request of the Editor-in-Chief. A post-publication investigation was prompted by concerns raised by the authors about the integrity of the results presented in their published article. Based upon the information provided by the authors and their subsequent assessment, the Editor-in-Chief lost confidence in the validity of the results reported in the paper. A decision to retract the article was therefore made in accordance with the journal's commitment to upholding the highest standards of scientific integrity and accuracy in published research.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Zhaomin Lu,Guang Li,Kuang Sheng,Ting Wu,Wenwen Luo,Hu Zhou,Qingfeng Yi
Further enhancing the electrocatalytic performance of transition metal sulfides for oxygen evolution and oxygen reduction reactions (OER and ORR) is crucial for the development of high-efficiency electrochemical energy devices. Here, the highly efficient iron-doped nickel sulfide/cobalt sulfide heterostructure catalyst (Fe-NiS 2 /CoS 2 ) was successfully prepared via a combination of hydrothermal-sulfidation-reduction strategy. Physical characterizations coupled with electrochemical tests reveal that Fe doping plays a key role in the excellent performance of Fe-NiS 2 /CoS 2 by lowering charge transfer resistance, optimizing electronic structure, and promoting reaction kinetics synergistically. As a result, the Fe-NiS 2 /CoS 2 catalyst exhibits a bifunctional electrocatalytic reactivity with a low ΔE of 0.61 V, surpassing noble-metal-based catalyst and most of the reported iron-related sulfide bifunctional catalysts. Specifically, the catalyst exhibits low overpotentials of 265 mV at 10 mA cm −2 and 381 mV at 100 mA cm −2 for the OER, while maintaining an ORR E 1/2 of 0.88 V. Aqueous zinc-air battery (ZAB) based on Fe-NiS 2 /CoS 2 achieve the specific capacities of 678.5 mAh g Zn −1 and along with 200 h cycling stability. This work provides an effective approach to improving transition metal sulfides, with potential for broader application in OER/ORR-related energy technologies.
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INDUSTRIAL CROPS AND PRODUCTS
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2025
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IF 6.2
Honghui Yan,Xiangyu Wang,Yi Zhu,Yuding Zhu,Ruiqi Xin,Shunze Zhang,Meiling Chen,Song Li,Jeonghun Kim,Wenkai Zhu
Free formaldehyde poses significant health risks as a prevalent indoor organic pollutant, driving demand for efficient and renewable adsorption solutions. While Fe-CoPBA bimetallic metal-organic frameworks show potential for formaldehyde removal, their powdered crystalline form presents practical limitations including poor recyclability and secondary contamination. Herein, we developed a novel Fe-CoPBA@bamboo composite (Fe-Co@B) through solution blending, leveraging bamboo's inherent micro-nano hierarchical pores for Fe-CoPBA encapsulation. The Fe-CoPBA nanoparticles (NPs) successfully integrated into delignified bamboo conduits through hydroxyl-mediated ligand bonding and van der Waals interactions. Formaldehyde removal tests demonstrated Fe-Co@B's dual adsorption-catalysis mechanism effectively eliminates indoor free formaldehyde. The Fe-Co@B maintained stable removal efficiency for formaldehyde through 10 regeneration cycles while preserving structural integrity. Furthermore, the Fe-Co@B exhibits high reusability along with moisture and deformation resistance. Therefore, this work contributes to solving the current problem of indoor free formaldehyde pollution and provides research ideas for the development of new functional bamboo-based products.
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NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 25
·10300-10308
·
IF 3.288
Xiuqin Yang,Jing Jin,Zhuming Guo,Zhiyin Xiao,Naiwen Chen,Xiujuan Jiang,Yi He,Xiaoming Liu
In this study, five salts containing the same anion fac-[FeII(CO)3I3]− were prepared through the reaction of cis-[Fe(CO)4I2] with organic amines whose protonated forms, i.e., (EtNH3+), (PrNH3+), (BuNH3+), (PentNH3+), and (Et2NH2+), become the cations of the salts 1, 2, 3, 4, and 5, respectively. These aminium salts, which are soluble in water and polar organic solvents such as DMSO and methanol, were characterized by various techniques including X-ray single-crystal diffraction. These salts underwent solvolysis in both water and DMSO to release CO, following first-order kinetics. In DMSO, the decomposition of these salts proceeded via a significantly simpler mechanism without the involvement of radicals than that in water, and the CO-release rate of these salts was almost linearly related to the hydrophobicity (the logarithm of the oil/water partition coefficient P) of the amines. The CO-release rate was substantially faster in water and in addition to undergoing solvolysis, the anions generated an iodine radical, I˙. Due to the complicated decomposition of these salts in water, the CO-release proceeded in a two-stage manner. The iodine radical was found to be at least partly responsible for the cytotoxicity of these salts in water; this indicates that the proposed anion has potential for applications in cancer therapy.
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JOURNAL OF MATERIALS SCIENCE
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2026
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IF 4.4
Zeng Fanen,Xu Bing,Jing Chenglong,He Xiaodong,Li Chunyang,Li Guojun
High-entropy oxides (HEOs) have attracted considerable attention for energy storage applications because of their multi-principal synergistic effects and excellent structural stability. In this study, polyethylene glycol (PEG) was used as a surfactant to synthesize (CrMnFeCoNi) 3 O 4 HEOs by tuning the molar ratio of PEG to metal cations ( P / M ). The results show that PEG plays three roles during synthesis, serving simultaneously as a coordinating dispersant, a structure-directing agent, and an in situ porogen. The optimized HEO ( P / M = 4/5) exhibits a uniform nanoparticle morphology and a well-developed pore architecture, delivering a specific capacitance of 557.6 F g –1 . Kinetic analysis further indicates that its pseudocapacitive behavior is from a cooperative effect involving both capacitive-controlled and diffusion-dominated mechanisms. The assembled asymmetric supercapacitor device achieves an energy density of 64.2 Wh kg –1 at a power density of 375.3 W kg –1 and retains 81.3% of its capacitance after 10000 charge/discharge cycles. These outstanding electrochemical properties highlight the promise of PEG template (CrMnFeCoNi) 3 O 4 HEOs for advanced energy storage applications. Graphical abstract
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Small
·
2026
·
IF 12.1
Bin Li,Hao Xiong,Guangying Chen,Xiaomin Guan,Jing Chen,Jian Pu,Bo Chi,Yunfeng Tian,Kaisheng Xia
The development of oxygen electrodes for reversible solid oxide cells (RSOCs) is hindered by insufficient catalytic activity, limited stability, and a mismatch in the thermal expansion coefficients (TEC) with electrolytes. Herein, we design and synthesize a novel perovskite oxide, La 0.6 Ca 0.4 Fe 0.8 Ni 0.1 Co 0.1 O 3–δ (LCFNC), using a multi-element B-site synergistic doping strategy. Systematic investigations reveal that the incorporation of Fe stabilizes the perovskite lattice, while the addition of Ni and Ca effectively suppresses the TEC (to 12.7 × 10 −6 K −1 after GDC compositing), ensuring excellent electrolyte compatibility. Furthermore, the cooperative interplay between Ni, Co, and Fe establishes ternary active centers, significantly increasing the concentration of surface oxygen vacancies. Full-cell measurements demonstrate a peak power density of 1.60 W·cm −2 at 800°C and a high electrolysis current density of 1.82 A·cm −2 at 1.3 V. Stability tests, including 100 h of constant-current electrolysis at 750°C and 24 reversible operation cycles, highlight exceptional interfacial and structural stability. More importantly, the assembled industrial-sized RSOCs (15 × 15 cm 2 ) achieve an output power of 64 W in fuel cell mode and a maximum current of 105 A in electrolyzer mode at 800°C, demonstrating its potential for practical applications. This work elucidates the mechanistic role of multi-element B-site regulation and provides an effective design principle for oxygen electrode materials that enhance activity, stability, and compatibility simultaneously, thus advancing the practical deployment of high-performance RSOCs.
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MOLECULES
·
2024
·Vol. 29
·期 4
·850
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IF 4.2
Meng Guo,Dou Wu,Hongyu Yang,Xiao Zhang,Dong-Xu Xue,Weiqiang Zhang
The use of gaseous CO in Pd-catalyzed carbonylative quinolone synthesis presents challenges related to safety and precise pressure control. In response, a streamlined non-gaseous synthesis of 4-quinolone compounds has been developed. This study introduces a tunable CO-releasing system utilizing Fe(CO)5activated by a dual-base system of piperazine and triethylamine. This alternative liquid CO resource facilitates the palladium-catalyzed carbonylative C-C coupling and subsequent intramolecular cyclization. By tuning the tandem kinetics of carbonylation and cyclization, this non-gaseous method achieves the successful synthesis of 22 distinct 4-quinolones with excellent yields. This is achieved through the three-component condensation of sub-stoichiometric amounts of Fe(CO)5with 2-iodoaniline and terminal alkynes. Operando mechanistic studies have revealed a novel CO transfer mechanism that facilitates homogeneous carbonylative cyclization, distinguishing this method from traditional techniques. In addition to addressing safety concerns, this approach also provides precise control over selectivity, with significant implications for pharmaceutical research and the efficient synthesis of pharmaceutical and bioactive compounds.
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