Small
·
2021
·Vol. 18
·期 6
·2106273
·
IF 13.281
Huan Liu,Na Li,Weibin Zhang,Shiwei Zhang,Jianchuan Wang,Yong Du
Heterogeneous atoms substitution is an efficient method for promoting Li + storage of transition metal oxides. Herein, a series of Fe-substituted MnO solid solutions with different Fe contents are synthesized by a feasible solid-phase method. The synergistic effects between heterogeneous atoms and rich vacancies are synchronously obtained, which hold distinctive electronic structures and substantial active sites. When optimized Mn 0.55 Fe 0.45 O solid solution as anodes for lithium-ion batteries, pre-prepared electrodes exhibit reversible lithium storage of 1286.9 mAh g –1 at 1 A g −1 after 400 cycles and even 628.1 mAh g –1 at 2 A g –1 after 1000 cycles. The LiCoO 2 //Mn 0.55 Fe 0.45 O full cells are assembled, achieving the reversible capacity of 130.2 and 111.3 mAh g –1 after 150 cycles at 0.1 and 0.2 A g –1 , respectively. Density functional theory calculations also authenticate that the electrochemical activity can be markedly boosted by the heterogeneous atoms substituted Mn 1 -x Fe x O solid solution.
研究领域:
材料科学
·
电化学
·
电池技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Wenjuan He,Zuopeng Li,Shengchen Lv,Mingxin Niu,Wenfeng Zhou,Jing Li,Runhua Lu,Haixiang Gao,Canping Pan,Sanbing Zhang
The Fe 3 O 4 @MIL-100(Fe) hybrid composites are successfully synthesized via an in-situ growth method and characterized using various techniques. The ability of the magnetic metal–organic framework to promote photo-Fenton like processes is investigated using levofloxacin as a representative substrate. The results show that the composite with a Fe 3 O 4 :MIL-100(Fe) mass ratio of 1:4 has a higher degradation efficiency (up to 93.4%) than Fe 3 O 4 , MIL-100(Fe), and the other fabricated composites. This higher catalytic activity is ascribed to the synergistic effect between Fe 3 O 4 and MIL-100(Fe), by which the quick separation of hole-electron pair from MIL-100(Fe) and the efficient reduction of Fe 3+ to Fe 2+ in the photo-Fenton reaction are mutually promoted. Moreover, the composite shows favorable recyclability without apparent loss of apparent photo-Fenton activity even after five cycles, and more importantly, can be recovered magnetically. The possible degradation mechanism and intermediates of levofloxacin in the photo-Fenton reaction have been tentatively proposed based on free radical quenching, electron paramagnetic resonance and mass spectrometry analysis. Finally, the developed Fe 3 O 4 @MIL-100(Fe) is successfully applied for the removal of levofloxacin from spiked wastewater with removal efficiencies ranging from 77.9 to 85.5%, which indicates that the proposed system has significant potential for wastewater treatment applications.
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Hao Xu,Qian Ye,Qingguo Wang,Peng Zhou,Xiaowei Huo,Yunqi Wang,Xue Huang,Guanyu Zhou,Jing Zhang
Developing a low-cost and environmental friendly way to promote the Fe(III)/Fe(II) cycling is crucial to enhance the efficiency of Fenton reaction. In this study, g-C 3 N 4 was introduced into the Fe(III)/H 2 O 2 system as electron donor to accelerate Fe(III)/Fe(II) cycling and improve the degradation of organic pollutants under visible light. The g-C 3 N 4 /Fe(III)/H 2 O 2 /light system can achieve excellent degradation of different kinds of organic pollutants under low Fe(III) and H 2 O 2 dosages. The central composite design (CCD) and response surface methodology (RSM) were applied to evaluate the effects of g-C 3 N 4 dosage, Fe(III) dosage, H 2 O 2 dosage and light intensity on the DMP degradation efficiency. The mechanisms were investigated by quenching experiments and electron spin resonance (EPR) analyses that the photo-generated electrons and O 2 – were responsible to the Fe(III) reduction through interfacial and aqueous pathways, respectively. OH was the dominant reactive radical in the DMP degradation. Moreover, DMP degradation routes were proposed including the elimination of specific groups, the hydroxylation process and the ring-opening reactions. This study demonstrates an economical and green approach which provides a promising direction for the practical application of g-C 3 N 4 based photocatalysis by integrating it with the Fe(III)/H 2 O 2 Fenton process.
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DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Limo He,Song Hu,Xiaofei Yin,Jun Xu,Hengda Han,Hanjian Li,Qiangqiang Ren,Sheng Su,Yi Wang,Jun Xiang
Fe-modified Ni/Al 2 O 3 catalysts with Fe/Ni molar ratios of 0, 0.5, 1 and 2 were prepared to promote the co-production of H 2 and carbon nanotubes (CNTs) during steam reforming of toluene as a tar model compound. After the addition of Fe, toluene conversion increased from 55.1% of Ni/Al 2 O 3 to 73.6% of F1N1A (Fe/Ni ratio of 1), and H 2 yield over F1N1A reached the maximum of more than 2000 mmol/(g-cata). Multi-walled carbon nanotubes with average diameter of 10–30 nm were generated and follow tip-growth mechanism. Compared with Ni/Al 2 O 3 , the addition of Fe remarkably increased the amount and quality of CNTs which had longer length and less tortuosity. These dual promoting effects on H 2 and CNTs after the addition of Fe were attributed to the strong interaction between Ni and Fe in Fe-Ni alloy. Fe-Ni alloy had the high activity for the decomposition performance of toluene and H 2 O to generate more H 2 and intermediates for improving the reforming reaction. Meanwhile, the high catalytic decomposition activity supplied more carbon species and the formation of Fe-Ni alloy enhanced the generation of metal carbide for promoting CNTs growth. Besides, the deposition of amorphous carbon was suppressed and the interaction between Ni particle and catalyst support was weakened after the addition of Fe, which kept the activity of catalyst and promoted the tip-growth of CNTs.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Fangke Yu,Yi Wang,Hongrui Ma,Minghua Zhou
In this study, we demonstrated that hydrothermal synthesized FeS 2 was highly efficient to catalyze the H 2 O 2 decomposition for diclofenac sodium (DCF) degradation in a wide range of initial pH (3–9) by heterogeneous electro-Fenton (EF) process, and this “Pyrite-EF” showed a better performance for the mineralization of DCF in comparison with the classic EF process. Effect of pyrite content on the hydroxyl radicals generation and iron dissolution produced by the decomposition of hydrogen peroxide (H 2 O 2 ), and applied current density on the degradation kinetics and mineralization efficiency were studied. Moreover, toxicity assessment by means of microtox method showed the solution toxicity was removed after treatment. Experimental results revealed that the enhancement of DCF degradation rate in the Pyrite-EF process was attributed to the molecular oxygen activation induced by more surface bound ferrous ions on FeS 2 , generating superoxide anions to accelerate the Fe(II)/Fe(III) cycle on the FeS 2 surface, which favored the H 2 O 2 decomposition to generate more hydroxyl radicals for the DCF degradation via a heterogeneous EF-like process. These findings could provide some new insights into the molecular oxygen activation induced by FeS 2 and the subsequent heterogeneous Pyrite-EF degradation of organic pollutants from wastewater.
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 26
·26394-26404
·
IF 2.8
Liu Yong,Lang Jie,Wang Ting,Jawad Ali,Wang Haibin,Khan Aimal,Chen Zhulei,Chen Zhuqi
Phenylurea herbicide residuals in soil may continuously contaminate surface water and groundwater due to unregulated and improper use. Herein, we reported a stable and active oxidation system including heterogeneous Fe-based layered double hydroxide materials as persulfate (PS) activators. Under mild conditions, 1% LDH in weight and 70 mM PS can completely degrade 500 mg/kg isoproturon in soil within 10 h, during which less than 0.1 ppm heavy metal leaching was detected. This remarkable performance was consistent in a broad pH range (3~11) and was resistant to various inorganic anions (Cl − , Br − , NO 3 − , HCO 3 − ) and humic acid. Mechanism studies from scavenging tests, EPR, and fluorescence spectra collectively proved that besides •OH and •SO 4 − , singlet oxygen ( 1 O 2 ) and superoxide (•O 2 − ) were also generated and were accounted for the oxidative degradation. This unique mechanism of generating diverse radicals was clearly distinguished from classic Fe(II)/PS system, significantly reduced the influence of varying parameters in water and soil matrix, and was suggestive to chemical oxidation system in soil remediation to avoid scavenging effects by background electrolytes or other components in water/soil matrix.
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Caiyu Ge,Yuefan Wang,Yilin Wang,Zhifang Liu,Chao Chen,Yixi Xie,Pengcheng Zhao,Junjie Fei
As a natural flavonoid compound found in fruits, vegetables and herbs, luteolin (LU) has potent pharmacological activities and beneficial biological properties. Here, a Fe/Zn bimetallic ZIF pyrolysis-derived Fe-Fe 3 O 4 N-doped mesoporous carbon was in-situ grown on carbon nanofibers (Fe-Fe 3 O 4 -NPC@CNFs), and it was used as an ultrasensitive electrochemical sensing platform for the efficient detection of LU in natural samples. Multiple characterization results show that Fe-Fe 3 O 4 -NPC@CNFs is a dodecahedral particle uniformly grown on CNFs with good crystal structure and uniform elemental distribution. Its rough surface with good mesoporous structure and high specific surface area of 823.19 m 2 /g is beneficial for LU adsorption. The density of states (DOS) and adsorption energies of NPC and Fe-Fe 3 O 4 -NPC further demonstrate that Fe-Fe 3 O 4 -NPC has better electrochemical performance and adsorption effect on LU. Under optimized conditions (carbonization: 800℃, pH: 5.0, enrichment: −0.2 V for 400 s), the Fe-Fe 3 O 4 -NPC@CNFs/GCE sensor showed satisfactory detection performance for LU in the range of 0.001–1.5 μM with the limit of detection (LOD) of 0.47 nM. Furthermore, this sensor exhibits excellent anti-interference capability, reproducibility, and stability, and it was also possible to effectively detect LU in food samples. This work provides a new strategy for the quantitative analysis of LU in food.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jiangnan Xu,Xiu Luo,Weiwei Su,Guorong Jia,Huawei Cai,Danni Li,Rou Li,Xiangdong Wang,Yefa Yang,Tao Wang,Changjing Zuo
Transarterial radioembolization (TARE) is a primary palliative treatment for advanced liver cancer. Nonetheless, its therapeutic efficacy is frequently hindered by resistance to tumor cell apoptosis induced by inter-radiotherapy. Induction of multiple cell death modalities provides a potential solution to this challenge. Ferroptosis, a distinct form of cell death from apoptosis, is dependent on the intracellular Fe2+-mediated Fenton reaction for the production of hydroxyl radicals (·OH) and is gaining recognition as a promising approach for cancer treatment. In this study, we synthesized a therapeutic radionuclide iodine-131 (131I)-based TARE agent by combining 131I-labeled iron-based MIL-88B(Fe) nanoparticles (NPs) (abbreviated as 131I-MIL-88B(Fe)) with Lipiodol to achieve a combined apoptosis–ferroptosis tumor therapy. Specifically, a mixture of Lipiodol and 131I-MIL-88B(Fe) NPs was injected into the liver tumors through the hepatic artery. Lipiodol blocks the arterial blood supply of the tumor, causing tumor tissue necrosis, whereas 131I inter-radiotherapy damages deoxyribonucleic acid (DNA) through direct action or indirectly via the production of ·OH through H2O radiolysis, leading to tumor cell apoptosis. Importantly, hydrated electrons (eaq–), a byproduct of H2O radiolysis, promoted the conversion of Fe3+ to Fe2+ in MIL-88B(Fe) NPs, enhancing the efficacy of the Fenton reaction and triggering ferroptosis. In vitro experiments demonstrated that compared to 131I alone, 131I-MIL-88B(Fe) NPs significantly enhanced ferroptosis-mediated tumor cell death due to 131I-induced Fe2+ production, which increased catalytic activity in the Fenton reaction. In a rat model bearing orthotopic N1S1 liver tumors, TARE with Lipiodol and 131I-MIL-88B(Fe) NPs induced tumor cell necrosis, apoptosis, and ferroptosis, resulting in improved therapeutic outcomes. This study leverages eaq– to facilitate Fe3+/Fe2+ conversion for efficient ferroptosis, turning waste into a valuable resource. This demonstrated the innovative integration of multiple treatment strategies to augment the efficacy of TARE in liver cancer therapy.
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产品关联
DOI
PubMed
高影响因子
Water
·
2017
·Vol. 9
·期 5
·326
·
IF 1.832
Ting Zhang,Jian He,Xingzhang Luo
Due to the fact that not all eutrophic lakes have cyanobacteria blooms, we hypothesized Fe may be another important limiting factor which regulates cyanobacteria bloom formation. We tested the hypothesis by batch cultures of bloom-forming Cyanobacterium,Microcystis aeruginosawith different ethylenediaminetetraacetic acid (EDTA)-Fe concentrations (0.5–6.0 mg/L), three levels of initial biomass, and excessive N and P (N = 4.2 mg/L, P = 0.186 mg/L) to simulate dynamically a cyanobacteria bloom in eutrophic conditions. The effect of EDTA and Fe uptake kinetics byM. aeruginosawere also examined. Results showedM. aeruginosagrowth rate positively correlated with EDTA-Fe concentration and negatively correlated with biomass. Maximal biomass ofM. aeruginosawas determined by Fe availability and initial biomass. EDTA could decrease both Fe availability and toxicity. Based on experimental results, a conceptual model of how Fe availability regulates cyanobacterial biomass in eutrophic lakes was developed. This study demonstrated bioavailable Fe is a potential limiting factor in eutrophic lakes that should be included in eutrophication management strategies.Keywords:Microcystis;eutrophication control;freshwater;Fe availability
研究领域:
环境科学
·
生态学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Wenjuan Shen,Fangjing Lin,Xu Jiang,Hefei Li,Zhihui Ai,Lizhi Zhang
In this study, we systematically investigated the removal of bromate (BrO 3 − ) with core-shell Fe@Fe 2 O 3 nanowires at neutral pH, especially the effects of surface bound ferrous ions and molecular oxygen. In the presence of Fe@Fe 2 O 3 nanowires, bromate was reduced to Br − efficiently with the generation of HOBr intermediates. Bromide species analyses and nanowires characterizations indicated that surface bound ferrous ions of core-shell Fe@Fe 2 O 3 nanowires could effectively promote the BrO 3 − removal. Meanwhile, molecular oxygen competed electrons from both Fe 2+ and Fe 0 to generate reactive oxygen species of O 2 − , H 2 O 2 , and OH during the bromate removal process. Among the generated reactive oxygen species, O 2 − and H 2 O 2 favored of bromate removal, but OH inhibited. We proposed a bromate removal mechanism with core-shell Fe@Fe 2 O 3 nanowires, which suggested that the effect of surface bound Fe(II) and molecular oxygen was taken into consideration when using nZVI for bromate remediation in waters. This study can not only deepen our understanding on the bromate removal with zero valent iron, and also shed light on the design of high performance bromate removal materials.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Zhifei Hu,Zejiao Wang,Mingming Wang,Zhigang Wang,Yuanyuan Chu,Xiaoyao Tan,Yunxia Hu,Tianjia Chen,Shaomin Liu
Dense metal membranes are widely studied due to their promising performance in hydrogen separation. In this work, the low-cost dense iron (Fe) hollow fiber membranes (FeHFMs) were developed via the phase inversion and high-temperature sintering method. By tuning the preparation conditions, two typical gas-tight hollow fibers referred to as the sandwich- and honeycomb-structured membranes were successfully synthesized. H 2 permeation behavior was well described by Sieverts equation based on the solution-diffusion mechanism. The sandwich-structured FeHFMs had an H 2 flux of up to 7.51 mmol m −2 s −1 when operated at a temperature of 850 °C. In comparison, the honeycomb-structured FeHFMs further enhanced the H 2 flux by a factor of 3.2 due to the optimized membrane morphology with only one single dense iron layer. The developed FeHFMs showed superior H 2 permeation stability in thermal shock tests (40 h) and long-term stability tests (120 h). This work also expanded the potential application horizons of the FeHFMs, which can be easily tailored into porous or dense structures by tuning the sintering conditions.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
GREEN CHEMISTRY
·
2020
·Vol. 22
·期 24
·8728-8733
·
IF 9.48
Qun Liu,Dan Pan,Tingting Ding,Mengchao Ye,Fengjiao He
The spent pickling solution, which comes from the pickling process of iron and steel, is indispensable in the manufacturing industry. Iron gets dissolved in the acid solution during the pickling process. When the concentration of metal ions in the acid solution accumulates to a certain value, it cannot to be used to wash iron and steel materials and becomes spent pickling solution that should be treated before discharge. At present, spent pickling solutions are treated via neutralization precipitation techniques in industries. This treatment method has a large discharge of wastewater, and the cost is high due to which it cannot meet the needs of green cycle in industry production. In this study, a new method, which is based on the formation of quaternary ammonium salt precipitate in a strong acid solution, is proposed to treat the spent pickling solution. The spent pickling solution was recycled and reused by precipitation separation of iron ion. The quaternary ammonium salt was recycled by dissolving the obtained precipitate in an alkali solution. The new ferric hydroxide precipitate formed and quaternary ammonium salt was returned to the solution. In the whole process, only a few amount of alkali was consumed. The removal rate of iron ion was up to 99.72%. Compared with the traditional neutralization precipitation method, the acid is not consumed and it can be reused; the alkali was consumed only for the precipitation of iron ions, not for the neutralization of the acid. The proposed method is an effective and economic method for the recovery of the spent pickling solution. It is expected to satisfy the requirements of green cycle and environmental protection in industry production.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）