MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 11
·1-9
·
IF 5.7
Deng Yan,Li Shuhuai,Ma Xionghui,Wu Yuwei,Pang Chaohai,Wang Mingyue,Li Jianping,Zhi Xu
The key to developing sensors for chiral drug determination is to exclude interference from enantiomers. In this study, metal–organic frameworks (MOFs) and molecularly imprinted polymer (MIP) were introduced to prepare a chiral sensor for levofloxacin detection. The MIP was electropolymerised on the surface of the Cu/Fe-benzene-1,3,5-tricarboxylate MOF (Cu/Fe-BTC)-modified Au electrode using levofloxacin as a template molecule. After eluting the levofloxacin, a chiral sensor with recognition sites for levofloxacin was obtained. With this site as a switch, a novel method for detecting levofloxacin was established. Because of the enhanced recognition effect, the sensor can effectively exclude the enantiomeric interference of d-ofloxacin. Moreover, Cu/Fe-BTC can effectively amplify the current response signal and improve the sensitivity of the sensor. The linear range of the sensor was 5 to 4000 × 10 −11 mol L −1 , and the detection limit was 2.07 × 10 −11 mol L −1 . When applied to detecting levofloxacin in actual samples, the sensor showed a 92.7–109.8% recovery. Graphical
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 17
·25273-25286
·
IF 0
Chen Junxia,Yang Zhenzhen,Li Weigang,Yang Yuying,Zhu Feng,Huo Zongli,Zhou Qing
The poor conductivity, poor stability, and agglomeration of iron-based metal organic framework MIL-88A(Fe) limit its application as persulfate (PS) activator in water purification. Herein, MXene-supported MIL-88A(Fe) composites (M88A/MX) were synthesized to enhance its adsorption and catalytic capability for tetracycline (TC) removal. Scanning electron microscope (SEM), X-ray diffractometer (XRD), Fourier transform infrared spectrometer (FT-IR), and X-ray photoelectron spectroscopy (XPS) were used to characterize prepared materials, confirming the successful attachment of MIL-88A(Fe) to the surface of MXene. M88A/MX-0.2 composites, prepared with 0.2 g MXene addition, exhibit optimal degradation efficiency, reaching 98% under conditions of 0.2 g/L M88A/MX-0.2, 1.0 mM PS, 20 ppm TC, and pH 5. The degradation rate constants of M88A/MX-0.2 were 0.03217 min −1 , which was much higher than that of MIL-88A(Fe) (0.00159 min −1 ) and MXene (0.00626 min −1 ). The removal effects of reaction parameters, such as dosage of M88A/MX-0.2 and PS; initial solution pH; and the presence of the common co-existing constituents (humic acid and the inorganic anions) were investigated in detail. Additionally, the reuse of M88A/MX-0.2 showed that the composites had good cycling stability by recurrent experiments. The results of electron paramagnetic resonance (EPR) and quenching experiments indicated that ·OH, ·SO 4 − , and ·O 2 − were involved in the M88A/MX-0.2/PS system where persulfate oxidation process was activated with prepared M88A/MX-0.2. In addition, the intermediates of photocatalytic degradation were determined by HPLC–MS, and the possible degradation pathways of the target molecules were inferred. This study offered a new avenue for sulfate-based degradation of Fe-based metal organic framework.
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PubMed
ACS Applied Nano Materials
·
2022
·
IF 6.14
Dandan Liu,Xueyan Li,You Li,Shu Yin,Jiajia Liu,Jiatao Zhang
Highly sensitive and selective gas sensors hold great potential in disease diagnosis. However, the rational design of non-noble-metal-based, high-efficiency sensing materials for trace gas detection remains a crucial challenge. Herein, a chemiresistive sensor that can detect parts per billion (ppb)-level acetone was realized based on three-dimensional (3D) α-Fe2O3/ZnO nanocages, which were achieved by a simple encapsulation and calcination process. In particular, we found that Fe species play an intriguing role in the evolution from Fe-ZIF-8 to heterogeneous α-Fe2O3/ZnO nanocages. α-Fe2O3 functionalization empowered the α-Fe2O3/ZnO nanocage-based sensor with a high response of 45.25, an ultrafast response (7 s) and recovery (6 s) time toward 50 ppm of acetone, a limit of detection (LOD) of 500 ppb, and superior selectivity. Moreover, in situ Fourier transform infrared analysis allowed one to devise of an acetone sensing mechanism for dissociative acetone adsorbed on the α-Fe2O3/ZnO nanocages, involving the first oxidation of acetone to form formate and acetate complexes, followed by further oxidation to CO2 and H2O. The enhanced acetone sensing performance can be attributed to the high specific surface area, abundant oxygen vacancies, well-tuned heterojunction, and optimal acid–base property.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
·
IF 3.7
Jianfang Liu,Hongwei Huang,Jie Yang,Laishuan Liu,Yu Li
A series of Au/Co x Fe 3- x O 4 catalysts was synthesized using the sol-deposition method by depositing 2–5 nm Au particles on Fe-doped Co 3 O 4 . Co 2 FeO 4 , with a Co/Fe molar ratio of 2:1, exhibited higher specific surface area , Co 3+ /Co 2+ ratio, and oxygen vacancy content compared to Co 3 O 4 . As a result, it displayed better performance in CO oxidation , achieving a total conversion temperature ( T 100 ) of 96 °C. Au greatly improved the catalytic efficiency of all Co x Fe 3- x O 4 samples, with the 0.2%Au/Co 2 FeO 4 catalyst achieving a further decrease in T 100 to 73 °C. Stability tests conducted at room temperature on the 1%Au/Co x Fe 3- x O 4 catalysts demonstrated a slowed deactivation rate after Fe-doping. The reaction pathway for CO oxidation catalyzed by Au/Co 2 FeO 4 followed the Mars-van Krevelen mechanism.
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RENEWABLE ENERGY
·
2025
·
IF 9.1
Hongming Liu,Junhao Cui,Zhiyang Zhao,Yongqi Ren,Bailong Chen,Longzhi Li
The traditional utilization of lignin mainly relies on direct combustion, which leads to low energy efficiency and environmental pollution, becoming a key bottleneck restricting the efficient utilization of all components of lignocellulose. This paper introduced a new strategy of microwave-assisted lignin hydrogenolysis over bifunctional catalyst Fe-Co/AC to achieve high-value conversion of lignin. This article firstly investigated the hydrogenolysis characteristics and product distribution patterns in the presence of Fe-Co/AC through catalyst characterization and adsorption calculation, as well as hydrogenolysis experiments. The results showed that the formation of Fe-Co alloy in the catalyst resulted in highly catalytic activity and selectivity for the hydrogenolysis process. Next, the intrinsic effects of solvent hydrogen donors and microwaves on lignin hydrogenolysis were discussed, through comparative experiments of hydrogenolysis in absence of catalyst and microwave-assisted pyrolysis. Lastly, attention was paid to calculate the adsorption characteristics and bond length changes of different substrates under metal components in order to reveal the mechanism of Fe-Co for synergistic catalyzing lignin hydrogenolysis, and to propose a potential pathway for lignin directed conversion into phenol. The findings provide a new approach for efficient bond breaking and intermediates hydrogenation of solid wastes such as lignin and plastics to obtain high value-added products.
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CATALYSIS LETTERS
·
2025
·Vol. 155
·期 7
·1-12
·
IF 2.4
An Li-Da,Li Feng,Qiu Yi-Feng,Liang Guo-Chao,Zhang Hao,Liu Hai Yang
Comprehending how substituent effect influences catalytic performance is essential for advancing efficient catalysts and unraveling reaction mechanisms. Examining the substituent effects of metal corrole catalyzed Baeyer–Villiger (B–V) oxidation reaction remains limited. In this work, four iron tri-aryl corrole complexes with distinct electronic structures, iron(IV) 5,10,15-tris(pentafluorophenyl) corrole [Fe IV (TPFC)Cl] ( 1 a), iron(IV) 5,15-bis(pentafluorophenyl)-10-phenyl corrole [Fe IV (BPFPC)Cl] ( 2 a), iron(IV) 5,15-bis(phenyl)-10-pentafluorophenyl corrole [Fe IV (BPPFC)Cl] ( 3 a) and iron(IV) 5,10,15-tris(phenyl) corrole [Fe IV (TPC)Cl] ( 4 a) have been prepared. The impact of electron-withdrawing meso-substituents on their catalytic performance in B-V oxidation reaction was then investigated. The results reveal that an increased number of pentafluorophenyl substituents, which enhance the electron-withdrawing effect, correlates with superior catalytic activity. The catalytic activity follows an order 1 a > 2 a > 3 a > 4 a. The plausible mechanism to explain the observed catalytic behavior was also discussed. Graphical
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 5
·e70143
·
IF 0
Lu Hong,Qiaoyu Chen,Lei Rao,Zhen Wang,Bing Wang,Qing He,Wenxin Lin
Generally, single cancer treatment is insufficient to achieve ideal therapeutic effect. Multimodal therapy has the potential to overcome efficacy challenges and reveals great promise in enhancing therapeutic effect. Herein, a combination treatment system (DOX@Fe-PBC) based on chemotherapy, chemodynamic therapy (CDT), and ferroptosis was constructed by loading anticancer drug doxorubicin hydrochloride (DOX) into Fe-based metal–organic framework (Fe-PBC). In simulated tumor microenvironment, the system released anticancer drug DOX to be a DNA intercalator and topoisomerase II inhibitor to realize chemotherapy (CT) and iron ions were delivered to induce Fenton reaction, which boost the generation of •OH, resulting in the enhancement of the effect of chemodynamic therapy (CDT). Meantime, the system could consume glutathione (GSH) to reduce the expression of glutathione peroxidase 4 (GPX4); then, lipid peroxides (LPO) were accumulated to realize ferroptosis. DOX@Fe-PBC provided an effective strategy of chemotherapy, CDT, and ferroptosis to realize ideal cancer treatment.
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DOI
MOLECULES
·
2025
·Vol. 31
·期 1
·
IF 4.6
Mingyu Liu,Bowen Pei,Hongyu Ba,Wei Ni,Huaheng Zhao,Shuang Chen,Jiamin Zhao,Jinsheng Zhao
The oxygen evolution reaction (OER) in water splitting involves complex multi-electron–proton transfer processes and represents the rate-determining step limiting overall electrolysis efficiency. Developing non-noble-metal catalysts with high activity and stability is therefore essential. Herein, a heterogeneous synthesis strategy was employed to in situ construct an iron-rich layered sulfate precursor (Fe0.42Co0.58-SO4/NF) on nickel foam, which underwent deep self-reconstruction in alkaline electrolyte to form nanoflower-like Fe0.42Co0.58OOH/NF. The optimized catalyst maintained its iron-rich composition and hierarchical structure, delivering outstanding OER performance with an overpotential of 220 mV at 10 mA·cm−2, a Tafel slope of 31.9 mV·dec−1, and stability exceeding 12 h at 600 mA·cm−2. Synchrotron analyses revealed dynamic transitions between mono-μ-O and di-μ-O Fe–M (M = Fe, Co) oxygen bridges during reconstruction, which enhanced both structural robustness and active-site density. The Fe-rich environment promoted the formation of Fe3+–O–Fe3+units that synergized with Co4+species to activate the lattice oxygen mechanism (LOM), thereby accelerating OER kinetics. This work elucidates the key role of oxygen-bridge geometry in optimizing catalytic activity and durability, providing valuable insights into the rational design of Fe–Co-based non-noble-metal catalysts with high iron content for efficient water oxidation.
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DOI
PubMed
高影响因子
VACUUM
·
2025
·
IF 3.9
Quanli Hu,Hanqiong Luo,Chao Song,Yin Wang,Jinghai Liu
HoCrO 3 displays fascinating magnetic characteristics. Owing to the co-presence of Ho 3+ and Cr 3+ ions, complex magnetic interactions are exhibited. A facile electrospinning as well as annealing way was utilized to make Fe-substituted HoCrO 3 nanofibers, which were HoCr 0.9 Fe 0.1 O 3 , HoCr 0.7 Fe 0.3 O 3 , and HoCr 0.5 Fe 0.5 O 3 . The perovskite orthorhombic structures of HoCrO 3 , HoCr 0.9 Fe 0.1 O 3 , HoCr 0.7 Fe 0.3 O 3 , and HoCr 0.5 Fe 0.5 O 3 were revealed by Rietveld refined XRD patterns. With the Fe substitution, the magnetic behaviors of HoCr 0.9 Fe 0.1 O 3 , HoCr 0.7 Fe 0.3 O 3 , and HoCr 0.5 Fe 0.5 O 3 NFs changed from canted antiferromagnetic at low temperature to paramagnetic at high temperature because of the combination of three kinds of magnetic contributions, namely Cr 3+ , Ho 3+ , and Fe 3+ . Fe substitution also enhanced the Cr 3+ ordering temperature from 139 to 161 K. This study should stimulate the development of holmium chromite nanomaterials for data storage devices and sensors.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 29
·期 4
·2733-2742
·
IF 2.019
Hou Huilin,Wang Lin,Yang Weiyou,Gao Fengmei
Fe-doped TiO 2 nanofibers with a thoroughly mesoporous structure were prepared via a facile foaming-assisted electrospinning method. The foaming agents and FeAcAc were introduced in the raw materials to create the mesopores and incorporate the Fe dopants into the conventional solid TiO 2 nanofibers, respectively, which could be accomplished simultaneously over a one-step calcination process. The photocatalytic experimental results demonstrate that the mesoporous Fe-doped TiO 2 nanofibers exhibit significantly enhanced activity toward the RhB degradation and splitting water for hydrogen generation under visible-light illumination, as compared to those of Fe-doped solid and intrinsic thoroughly mesoporous counterparts. The photocatalytic mechanism is proposed that the one-dimensional mesoporous nanostructure can enhance the transportation of the reactant and products, and the Fe-doping induces the shift of the absorption edge into the visible-light range and restrains the recombination of photo-generated electrons and holes, which can synergistically improve their activity.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 43
·23103-23112
·
IF 14.511
Xuqi Lin,Jingguo Gao,Kehua Zhong,Yongcong Huang,Hurong Yao,Yingbin Lin,Yongping Zheng,Zhigao Huang,Jiaxin Li
For high-performance silicon–carbon (Si–C)-based anode materials used in high-energy-density lithium-ion batteries (LIBs), there is an urgent need to rationally construct a stable solid electrolyte interface (SEI) film and load a high proportion of silicon content, which is closely related to the capacity and cycling stability of the electrode. Herein, composites of Fe/Fe3C-modified carbon nanofiber–coated Si nanoparticles (Fe/Fe3C–Si@CNFs) were synthesized via a simple electrospinning method. These composites effectively overcome the volume change effect, poor interfacial compatibility and low conductivity, delivering excellent LIB performance. Tested at 2.0 A g−1, Fe/Fe3C–Si@CNFs provides a high reversible capacity of 956.5 mA h g−1 with a coulombic efficiency of more than 99.5% even after 4000 ultra-long stable cycles. The high conductivity of the Fe/Fe3C embedded in the CNF framework can promote e− transfer and boost the Li+ diffusion kinetics in the electrode. The catalytic activity of Fe/Fe3C helps to enhance the interfacial compatibility, grow a balanced stable SEI film and promote the long-cycle stability of the electrode at room temperature.
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Journal of Water Process Engineering
·
2026
·
IF 6.6
Youde Zhang,Kangping Cui,Zhimeng Li,Tao Jiang,Shuhan Yang
Construction of recoverable magnetic Fe₃O₄-NH₂/UiO-66/SiO₂–silica seed for CaF₂ crystallization. • Composite seed directs fluoride conversion from wastewater to CaF₂ solid. • UiO-66/SiO₂ interface promotes ion enrichment and heterogeneous nucleation. • Magnetic recovery reduces the loss of fine CaF₂-loaded seed particles. • Integration of fluoride removal, CaF₂ recovery and solid-liquid separation. Calcium-based precipitation is widely used for treating concentrated fluoride wastewater, but rapid homogeneous nucleation often generates fine CaF₂ particles that are difficult to recover. In this study, a silica-supported Fe₃O₄-NH₂/UiO-66 composite was developed as a magnetically recoverable crystallization seed for directing CaF₂ formation. At an initial fluoride concentration of 2000 mg/L, a Ca:F molar ratio of 0.8:1, 0.5 g seed dosage, pH 7–8, and 25 °C reduced residual fluoride to 2.56 mg/L, corresponding to 99.87% removal. Ca 2+ -free tests yielded equilibrium fluoride uptakes of 570 and 755 mg/g for UiO-66 and the composite, respectively, indicating that adsorption contributed to interfacial enrichment but was insufficient to account for the high fluoride conversion after Ca 2+ addition. Thermodynamic analysis showed that the initial saturation index increased from 3.1 to 7.5 and relative supersaturation from 28.9 to 288 as the initial fluoride concentration increased from 250 to 2000 mg/L. The crystallization rate followed a supersaturation-dependent power law with a kinetic exponent of 2.146 (R 2 = 0.993). After 8 cycles, fluoride-removal and magnetic-recovery efficiencies remained at 80.09% and 80.50%, respectively. In actual industrial wastewater, 98.82% fluoride removal was achieved after pH adjustment to 7. These results demonstrate the potential of Fe₃O₄-NH₂/UiO-66/SiO₂ as a reusable crystallization seed for fluoride recovery.
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