JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Hongda Li,Honggao Deng,Shaonan Gu,Chenpu Li,Boran Tao,Shumin Chen,Xiong He,Guofu Wang,Wenfeng Zhang,Haixin Chang
The “FeMo cofactors” in biological nitrogenase play a decisive role in nitrogen reduction. Herein, a novel bionic Fe/Mo bimetallene was applied in photocatalytic nitrogen reduction. The surface coating Fe/Mo bimetallene of Bi 2 Mo 0.3 W 0.7 O 6 (BMWO) nanocrystals could effectively promote the separation and transportation of photogenerated carriers by multi–electron redox reactions and deliver 2.8 times longer photo–carrier lifetime. Consequently, the nitrogen fixation activity of Fe/Mo bimetallene–coated BMWO nanocrystal photocatalyst was obviously enhanced (218.93 μmol g –1 h −1 ), which was about 4.8 times that of unmodified BMWO nanocrystals. This work provides a novel approach to design bionic Fe/Mo bimetallene–modified inorganic semiconductor photocatalysts for nitrogen reduction.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
Lingjun Bu,Zhou Shi,Shiqing Zhou
In this paper, a mathematical model on Fe(II)-activated persulfate oxidation of atrazine (ATZ) was tested using the rate constants from literature, and the degradation kinetics and mechanism of ATZ degradation in Fe(II)/persulfate (Fe 2+ /PS) system were investigated to verify the model. Some influence factors were taken into consideration in this model, including molar ratio of Fe 2+ and PS, initial ATZ concentration, natural organic matter (NOM) concentration, tertiary butanol (TBA) and methanol (MeOH) concentrations. Corresponding experimental data could be predicted accurately according to this model. Both experimental data and predicted results implied that a molar ratio of Fe 2+ and PS at 1:1, low initial ATZ and NOM concentrations were favorable for ATZ degradation. Besides, the radical species were determined via evaluating the effect of TBA and MeOH, and results confirmed that both sulfate radical (SO 4 − ) and hydroxyl radical (OH ) existed in this system. To investigate the predominant radical in Fe 2+ /PS system, nitrobenzene (NB) was used as a probe compound which only react with OH . According to the degradation efficiency of NB and ATZ in Fe 2+ /PS system, it could be concluded that only small amount of OH were produced and SO 4 − made a major contribution to ATZ degradation in Fe 2+ /PS system. Experimental data, as well as the mathematical model in this study, improved our understanding on the effect of operating parameters for ATZ degradation in Fe(II)-based advanced oxidation processes.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Yuepeng Pang,Jing Wang,Zhiguo Zhou,Tao Yuan,Junhe Yang,Dalin Sun,Shiyou Zheng
Core-shell Fe 3 O 4 @Fe ultrafine nanoparticles (nano-Fe 3 O 4 @Fe, Fe 3 O 4 content 84 wt%) with a core (Fe) diameter of 5.1 ± 1.4 nm and a shell (Fe 3 O 4 ) diameter of 10.9 ± 1.6 nm is prepared by a liquid-phase pyrolysis and partial oxidation method. It is found that the core-shell Fe 3 O 4 @Fe ultrafine nanostructure can efficiently improve the electrochemical performance of Fe 3 O 4 as anode material for Li-ion batteries in terms of rate capability and cycle life. For instance, specific capacities of 884 and 705 mAh/g can be obtained for the nano-Fe 3 O 4 @Fe electrode after 100 cycles at 200 mA/g and 500 cycles at 1000 mA/g, respectively. It is believed that these improvements can be attributed to the significant shortened transfer distance of electrons and Li-ions with relatively low specific surface area, ultrahigh electronic conductivity inside the nanoparticles and good ductility to accommodate the asymmetric volume change.
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Materials Today Bio
·
2025
·
IF 10.2
Hongping Wan,Zhengqun Huang,Mingrun Tang,Huirong Tan,Kai Deng,Yingnan Liu,Xinghong Zhao,Hongjun Chen
Enveloped viruses such as coronaviruses are highly transmissible, necessitating effective prevention and inactivation strategies. In this study, we engineered uniform, small-sized (∼57 nm) iron-phenolic nano-networks (NA-Fe) that exhibit high lipoxidase-like activity for the inactivation of enveloped virus, encompassing both DNA virus (Pseudorabies, PRV) and RNA virus (Transmissible Gastroenteritis, TGEV; and Porcine epidemic diarrhea virus, PEDV). Theoretical studies indicate that NA-Fe facilitates the adsorption of pentadiene moieties within the viral envelope through interactions between the d -orbital electrons of iron and the π-electrons of pentadiene. This interaction leads to activation of the C=C bonds, potentially resulting in disruption of the viral envelope. Besides its extracellular antiviral effects, NA-Fe also suppresses intracellular viral replication by stimulating antiviral innate immune responses, and upregulate the expression of interferon-stimulating genes (ISGs). In vivo studies demonstrate that NA-Fe exhibits favorable biosafety, and intranasal administration significantly reduces viral titers while providing effective antiviral protection in PRV-infected mice. Notably, surfaces coated with NA-Fe, such as fences and air purifiers in farm facilities, provide effective antiviral protection. Collectively, these findings demonstrate that NA-Fe exhibits potent broad-spectrum antiviral activity against both extracellular and intracellular viruses, highlighting its potential for application in comprehensive biosecurity and infectious disease control.
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yingjin Ma,Qifeng Li,Xueqing Qiu,Zhixian Li
Single-atom nanozymes can accurately mimic the catalytic centers of enzymes at the atomic scale, showing high catalytic efficiency and selectivity. Inspired by the active center of natural laccase, we constructed a nitrogen-doped carbon-based single-atom nanozyme (Fe-NC) featuring planar Fe–N4 active sites using a zeolitic imidazolate framework (Fe/ZIF-8) as a precursor. The resulting Fe–NC showed high laccase-like activity toward phenolic substrates such as 2,4-dichlorophenol, with a catalytic efficiency 77 times higher than that of natural laccase. Furthermore, Fe–NC efficiently catalyzed the degradation of tetracycline hydrochloride (77.14%) under mild conditions, with an activity 13 times that of laccase. It also selectively and oxidatively depolymerized birch lignin into valuable aromatic monomers, including vanillin and vanillic acid. These findings highlight the key role of planar Fe–N4 coordination in improving bioinspired catalysis and reveal the great potential of single-atom nanozymes in biomass valorization.
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产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2023
·Vol. 25
·期 22
·15547-15554
·
IF 3.3
Changyin Zhong,Yifei Yang,Yun Fang,Jun Chen,Bomin Feng,Hongbing Wang,Wenhua Luo,Yunxi Yao
Lanthanum oxide (La2O3) possesses superior reactivity during catalytic hydrogenation, but the intrinsic activity of La2O3 toward H2 adsorption and activation remains unclear. In the present work, we fundamentally investigated hydrogen interaction with Ni-modified La2O3. Hydrogen temperature programmed desorption (H2-TPD) on Ni/La2O3 shows enhanced hydrogen adsorption with a new hydrogen desorption peak at a higher temperature position compared to that on the metallic Ni surfaces. By systematically exploring the desorption experiments, the enhanced H2 adsorption on Ni/La2O3 is due to the oxygen vacancies formed at the metal–oxide interfaces. Hydrogen atoms transfer from Ni surfaces to the oxygen vacancies to form lanthanum oxyhydride species (H–La–O) at the metal–oxide interfaces. The adsorbed hydrogen at the metal–oxide interfaces of Ni/La2O3 results in improved catalytic reactivity in CO2 methanation. Furthermore, the enhanced hydrogen adsorption on the interfacial oxygen vacancies is ubiquitous for La2O3-supported Fe, Co, and Ni nanoparticles. Benefiting from the modification effect of the supported transition metal nanoparticles, the surface oxyhydride species can be formed on La2O3 surfaces, which resembles the recently reported oxyhydride observed on the reducible CeO2 surfaces with abundant surface oxygen vacancies. These findings strengthen our understanding of the surface chemistry of La2O3 and shed new light on the design of highly efficient La2O3-based catalysts with metal–oxide interfaces.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Guojun Lv,Tao Wang,Xuyang Zou,Jialing Shen,Jiangzhang Wang,Yan Chen,Fumin Wang,Xubin Zhang
Framework doped iron materials such as Fe-MFI zeolite is an important heterogeneous Fenton-like catalyst for tetracycline degradation. Introduction of mesopore can enhance the tetracycline degradation performance for hollow Fe-MFI zeolite, however its positive effect is extremely limited ascribed to the essence of active sites of confined framework iron species. In this work, highly dispersed copper oxide on the hollow Fe-MFI zeolite CuO/FeS-1 was synthesized via an impregnation procedure and applied as heterogeneous catalyst for the tetracycline degradation. The synthesized CuO/FeS-1 was characterized by Scanning electron microscopy, Transmission electron microscopy , X-ray diffraction, UV–vis absorption spectrometry, Fourier transform infrared spectroscopy , Nitrogen adsorption-desorption and X-ray photoelectron spectroscopy. At pH = 7.0, CuO/FeS-1 revealed the highest tetracycline degradation rate of 99.6 % at experimental conditions: [TCE] = 30 mg/L, [PMS] = 1.0 g/L, [Catalyst] = 1.0 g/L, 333 K, and the largest degradation rate constant of 1.26 min −1 , which was 3.4 folds of FeS-1 zeolite and 1.8 folds of CuO . Electron paramagnetic resonance (EPR) technology disclosed that •OH, SO 4 • − , 1 O 2 and •O 2 − species were all the active species for CuO/FeS-1 zeolite in the tetracycline degradation. Furthermore, possible intermediates in the degradation of tetracycline over CuO/FeS-1 zeolite were identified with liquid chromatography-mass spectrometry (LC-MS).
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Nanomaterials
·
2022
·Vol. 12
·期 16
·2839
·
IF 5.719
Yuruo Zheng,Ghulam Hussain,Shuyi Li,Shanta Batool,Xiawa Wang
In this work, nanoparticles of Co1−xRexFe2O4and CoFe2−xRexO4(0 ≤ x ≤ 0.05) were synthesized by the sol-gel method. The Rietveld refinement analysis of XRD and Raman data revealed that all of the prepared samples were single phase with a cubic spinel-type structure. With the substitution of Re, the lattice parameters were slightly increased, and Raman spectra peak positions corresponding to the movement of the tetrahedral sublattice shifted to a higher energy position. Furthermore, Raman spectra showed the splitting of T2gmode into branches, indicating the presence of different cations at crystallographic A- and B-sites. The SEM micrograph confirms that surface Re exchange changes the coordination environment of metals and induces Fe-site structure distortion, thereby revealing more active sites for reactions and indicating the bulk sample’s porous and agglomerated morphology. The vibrating sample magnetometer (VSM) results demonstrated that the synthesized nanoparticles of all samples were ferromagnetic across the entire temperature range of 300–4 K. The estimated magnetic parameters, such as the saturation magnetization, remanent magnetization, coercivity, blocking temperature (TB), and magnetic anisotropy, were found to reduce for the Co-site doping with the increasing doping ratio of Re, while in the Fe site, they enhanced with the increasing doping ratio. The ZFC-FC magnetization curve revealed the presence of spin-glass-like behavior due to the strong dipole–dipole interactions in these ferrite nanoparticles over the whole temperature range. Finally, the dielectric constant (εr′) and dielectric loss (tanδ) were sharply enhanced at low frequencies, while the AC conductivity increased at high frequencies. The sharp increases at high temperatures are explained by enhancing the barrier for charge mobility at grain boundaries, suggesting that samples were highly resistive. Interestingly, these parameters (εr′,tanδ) were found to be higher for the Fe-site doping with the increasing Re doping ratio compared with the Co site.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Lulu Zheng,Siyu Gao,Shuaikang Yao,Yingjie Huang,Shangru Zhai,Jingai Hao,Xuemei Fu,Qingda An,Zuoyi Xiao
The development of novel materials for electrodes with high energy densities is essential to the advancement of energy storage technologies. In this study, N -doped layered porous carbon with ZIF-67-derived binary CoFe 2 O 4 -Fe particles was successfully fabricated by the pyrolysis of an Fe-based chitosan (CS) hydrogel mixed with ZIF-67 particles. Various characterization techniques were employed to assess the performance of the prepared porous CoFe 2 O 4 -Fe@NC composite. This composite exhibits excellent performance owing to the effective combination of multivalent CoFe 2 O 4 -Fe particles derived from ZIF-67 with N -doped porous carbon substances with a high surface area, which helps to accelerate ion and charge transfer. The specific capacitance of the CoFe 2 O 4 -Fe@NC composite carbonized at 700 °C reached 3960.9F/g at 1 A/g. When this composite is combined with activated carbon (AC) to construct an asymmetric supercapacitor (ASC), a density of energy of up to 84.9 W h kg −1 is attained at a power capacity of 291.6 W kg −1 . Moreover, this composite maintained a capacitance retention of up to 94.9 % after 10,000 cycles. This work offers new perspectives on high-performance supercapacitors and their applications.
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Fuel Cells
·
2022
·
IF 2.948
Yanqi Hao,Lin Ge,Siew Hwa Chan
Looking for non-noble metal catalysts with low cost, high activity, and high stability to replace platinum in oxygen reduction reaction (ORR) has aroused great concern. According to previous studies, Fe-N x /C material is one of the most promising non-noble metal catalysts for ORR. In this study, new Fe-N x /C material was synthesized by introducing CeO 2 and Fe 3 O 4 nanoparticles into a Fe-N x /C material derived from ZIF-8 as precursors. The new material was called CeO 2 -Fe 3 O 4 @Fe-N/C catalyst and the activity of the catalyst was found to be significantly improved in 0.1 mol L −1 KOH. The half-wave potential of CeO 2 -Fe 3 O 4 @Fe-N/C (0.892 V) is higher than that of Pt/C by 67 mV. In the stability test, the half-wave potential of CeO 2 -Fe 3 O 4 @Fe-N/C was only reduced by 4 mV after 5,000 cycles. The high performance is attributed to the introduction of CeO 2 and Fe 3 O 4 , which gives CeO 2 -Fe 3 O 4 @Fe-N/C enhanced electrocatalytic activity and long-term stability. This approach makes CeO 2 -Fe 3 O 4 @Fe-N/C a promising candidate for cathode catalysts in renewable energy conversion devices.
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DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 40
·15121-15126
·
IF 4.052
Yu Kuai,Weijun Li,Yujie Dong,Wai-Yeung Wong,Shuanma Yan,Yuyu Dai,Cheng Zhang
A metal complex nanosheet was synthesized by the liquid–liquid interface self-assembly method from a star-shaped ligand of tris[4-(4′-2,2′:6′,2′′-terpyridyl)-phenyl]amine in organic solvents and metal ion Fe(II) in water solution. The as-prepared nanosheet possessed excessively smooth morphology with a thickness of hundreds of nanometers. Adhering to an ITO glass, the nanosheet showed noticeable electrochromism from purplish red at 0 V to orange-yellow at 1.4 V and green at 1.6 V. Besides, the nanosheet exhibited outstanding stability with the optical contrast maintained at almost 100% of its original electrochemical activity over 500 cycles. The liquid–liquid interface self-assembly method was proven to be promising to prepare a polymeric metal complex for potential electrochromic applications.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2023
·Vol. 25
·期 8
·1-10
·
IF 2.5
Cui Wei,Fang Jiahui,Wan Yuanyuan,Tao Xueyu,Guo Litong,Feng Qiyan
In this study, Fe–N co-doped carbon nanotubes (Fe–N-CNTs) were prepared and used to activate peroxymonosulfate (PMS) for advanced oxidation removal of Rhodamine B (RhB). The XRD, XPS, SEM and EDS results revealed that the Fe, N, O co-doped carbon nanotubes (Fe–N-CNTS) coated with FeO(OH) nanosheets were successfully synthesized by a simple pyrolyzing process. The large BET specific surface area (286.42 m 2 /g) and hybrid pore structure of micropores and mesopores (3–10 nm) of the Fe–N-CNTS ensured its good RhB degradation performance (98% in 30 min) by activatting PMS. The Fe–N-CNTS-1.5 had the best degradation performance, which could be attributed to the synergy effect between FeO(OH) nanosheets and Fe–N-CNTS. The 1 O 2 , O 2 •, •OH and SO 4 −• were formed during the PMS activating process and involved in the RhB degradation. The reaction constant of 0.5483 min −1 could be obtained by adding 1.5 mM PMS, which is about 12 and 24 times of the reaction constant of PMS only (0.0458 min −1 ) and FeN-CNTS only (0.0226 min −1 ), respectively. This work provides new insight into the mechanism of PMS activation by carbon-based catalysts for the efficient degradation of RhB.
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