JOURNAL OF CATALYSIS
·
2017
·
IF 6.844
Cong Gao,Shuo Chen,Xie Quan,Hongtao Yu,Yaobin Zhang
The Fenton reaction is an efficient technology for degrading refractory organic pollutants in water. Heterogeneous Fenton-like catalysts have been demonstrated to be promising alternatives to homogeneous catalysts because of their reusability and lack of sludge production. These catalysts, however, generally show low activity for generating OH due to their limited exposed active sites and difficulty in the reduction of Fe(III) to Fe(II). Here, enhanced catalytic performance was achieved by using an iron-based metal organic framework (MIL-88B-Fe) as a heterogeneous Fenton-like catalyst over a wide pH range (4–6). The catalytic activity of MIL-88B-Fe was about 1–3 orders of magnitude higher than that of three other conventional catalysts (Fe 2 O 3 , α-FeOOH, and Fe 3 O 4 ) and two other iron-based MOFs (MIL-53-Fe and MIL-101-Fe). The superior activity of MIL-88B-Fe could originate from the abundance of active sites, the flexible structure, and facilitated reduction of Fe(III) to Fe(II). Hydroxyl radicals generated from reaction between MIL-88B-Fe and H 2 O 2 were the main reactive oxidative species for phenol degradation.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2015
·
IF 2.912
Zhongfei Zhang,Boyan Gao,Xiaowei Zhang,Yuanrong Jiang,Xuebing Xu,Liangli (Lucy) Yu
This study investigated whether and how triacylglycerol (TAG) may serve as a precursor for 3-monochloro-1,2-propanediol (3-MCPD) fatty acid ester formation using tristearoylglycerol (TSG). TSG was reacted with inorganic chloride compounds including NaCl, KCl, FeCl2, CuCl2, ZnCl2, FeCl3 and dry HCl, or organic chlorine compound lindane at different temperatures. Only FeCl2 and FeCl3 were able to form 3-MCPD esters from TSG. Further electron spin resonance (ESR) determination of TSG, Fe2(SO4)3 and 5,5-dimethylpyrroline-N-oxide (DMPO) reactions revealed potential of Fe ion in promoting free radical generations under the experimental conditions. To further confirm the effect of Fe ion, chelating agent (EDTA-2Na) was added to the model reactions. The results showed for the first time that EDTA-2Na was able to reduce the generation of 3-MCPD esters. In addition, FT-IR examination indicated a possible involvement of a carbonyl group during the reaction. Taking all the observations together, the possible mechanisms, involving the formation of either a cyclic acyloxonium or a glycidol ester radical intermediate, were proposed for generating 3-MCPD fatty acid di- and mono- esters from TAG under a high temperature and low moisture condition, as well as the coformation of glycidol esters. The results from this study may be useful for reducing the level of 3-MCPD esters and related toxicants in the refined edible oils and food products.
研究领域:
食品科学
·
毒理学
·
化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·123034
·
IF 7.5
Lin Yue,Shiqi Xing,Xiaoyun Han,Wang Liang,Yanfang Liu,Xinyang Liang,Yonghui Han
In this paper, a Bimetallic MOF material Ce-Fe-MI was doped in cellulose acetate (CA) to form a composite catalyst Ce-Fe-MI/CA for catalytic ozonation degradation of tetracycline (TC) wastewater. When the mass ratio of Ce-Fe-MI to CA is 0.45:1, the removal rate of Chemical Oxygen Demand(COD) reaches 95.04% in 90 min. The Ce-Fe-MI/CA catalyst exhibits high stability, with only a 4.61% decrease in the removal of COD after four cycles of use. The active components such as •OH and 1 O 2 are produced during the Ce-Fe-MI/CA catalyzed ozonation process. Density functional theory (DFT) simulations demonstrate distinct roles of metallic sites: Ce sites dominate TC adsorption, whereas Fe sites activate catalytic ozonation. The electron transfer between Ce and Fe can effectively regulate the surface valence state and rapidly activate surface adsorbed reactants. Furthermore, the presence of oxygen vacancies in the Ce-Fe-MI/CA framework significantly enhances the catalytic performance. The air flotation-catalytic ozonation coupling process is applied to the treatment of actual pharmaceutical wastewater. The coupled system runs continuously for 480 min, and the effluent COD kept below 50 mg·L −1 .
✓ 已验证
DOI
高影响因子
TALANTA
·
2022
·
IF 6.556
Xuemei Ma,Jiayi Yu,Lin Wei,Qian Zhao,Liyong Ren,Zhiyong Hu
Simultaneous selective determination of Fe (Ⅱ) and Fe (Ⅲ) is of great significance to the study of iron ion tracking and release of iron supplement in gastric fluid. In this paper, a composite material (N-CQDs/AgNPs/β-CD) was prepared by a one-pot method. The various characterizations confirmed the silver nanoparticles (AgNPs) grew in situ on the surface of nitrogen-doped carbon quantum dots (N-CQDs), and the β-cyclodextrin (β-CD) and AgNPs linked together by Ag–O bonds finally presented gourd-like nanoparticles on the surface of N-CQDs. Then, N-CQDs/AgNPs/β-CD modified glassy carbon electrode (GCE) was applied to detect Fe(II) and Fe(III) simultaneously. The cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results confirmed that N-CQDs/AgNPs/β-CD enhanced electrode performances because of the synergistic effect between N-CQDs, AgNPs and β-CD. The sensor was successfully applied for the determination by differential pulse voltammetry (DPV) of Fe(II) and Fe(III) released from four iron supplementations in simulated gastric fluid (SGF).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 10
·4061-4070
·
IF 3.288
Yayu Li,Tianyang Zhou,Zhangyong Yu,Fei Wang,Dongjian Shi,Zhongbin Ni,Mingqing Chen
Dual crosslinking network hydrogels fabricated by non-covalent interactions can have both excellent mechanical properties and tolerable self-healing performances. Although a range of hydrogels that are constructed by hydrophobic association-interaction (HAI) or/and Fe(III) ionic interactions have been reported, as far as we know, there has been little progress in the case of influence due to surfactant types and Fe(III) contents on the mechanical and self-healing properties. In this study, two kinds of dual crosslinking hydrogels based on acrylic acid (AA) and stearyl methacrylate (SMA) were fabricated by using sodium dodecyl sulfate (SDS) and polyvinyl alcohol (PVA) as physical crosslinking points, respectively, in which PAA was used as the hydrophilic part and PSMA as the hydrophobic part, and the ionic interaction of Fe(III) (Fe3+) ions combined carboxylic groups (–COO−) of PAA as the second crosslinking point. Mechanical properties, self-healing and self-recovery performances of the prepared hydrogels and their influencing factors were investigated. The mechanical properties of the two hydrogels increased with higher Fe3+ contents and reached a maximum at 0.3 mol% of Fe3+, while they increased gradually with the AA contents. The hydrogels showed self-healing properties with recoverable mechanical values after healing for 24 h. Moreover, the hydrogels also showed around 90% of self-recovery properties. The hydrogels formed by using PVA as a surfactant (HPAA-Fe3+@PVA) showed higher mechanical properties, but lower self-healing and self-recovery efficiencies, compared with those of the SDS-associated hydrogels (HPAA-Fe3+@SDS), because the PVA macromolecules with longer chains increased the chain entanglement. These results indicate that the mechanical properties, self-healing and self-recovery performances can be regulated by changing the surfactant types and compositions of the AA and Fe3+ of the hydrogels.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Songlin Wang,Wenxin Xu,Junfeng Wu,Qing Gong,Pengchao Xie
The low efficiency of transforming ferric ion (Fe 3+ ) to ferrous ion (Fe 2+ ) always challenges the activation of peroxymonosulfate (PMS) by (Fe 2+ ) processes in the degradation of micro-organic contaminants. In this study, molybdenum disulfide (MoS 2 ) which accelerated PMS activation and the Fe 2+ /Fe 3+ cycle through the reaction of Mo 4+ and Fe 3+ was employed to significantly improve the efficiency of Fe 2+ /PMS on sulfamethoxazole (SMX) degradation. Through the analysis of electron paramagnetic resonance (EPR) and quenching experiments, both sulfate and hydroxyl radicals have been proven to account for SMX degradation in the MoS 2 /Fe 2+ /PMS process. The optimal pH of 3 has been determined for SMX degradation in the process, and an equation to express the relationship between the rate of SMX degradation and the dosages of Fe 2+ , MoS 2 and PMS was simulated. Chloride ion and humic acid had positive and negative effects on the process, respectively, whereas nitrate and bicarbonate had no influences on SMX degradation. Through the identified intermediates by LC/MS, a transformation pathway of SMX in the MoS 2 /Fe 2+ /PMS process was proposed. Additionally, the good efficiency of SMX degradation (>80%) in real water matrices and good stability of MoS 2 after reuse for 6 times further suggest that the MoS 2 /Fe 2+ /PMS process can be effectively used to degrade SMX.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2024
·Vol. 67
·期 4
·1242-1249
·
IF 10.4
Zhang Jingjing,Deng Yongyan,Gai Dongxu,Shi Yang,Feng Xingwen,Li Peilong,An Yongtao,Zou Xiaoqin
Isotopic separation is of paramount importance for producing high-purity heavy hydrogen, yet the process remains hugely challenging. Here, we report on an Fe/ZSM-5 zeolite that was able to efficiently separate deuterium from protium via chemical quantum sieving. Structural data showed that four types of Fe species were present in Fe/ZSM-5 and oligomeric Fe–O clusters in the zeolite pores were correlated directly with gas selectivity. Gas adsorption revealed that Fe–O species served as the main adsorption sites and interacted with D 2 more strongly than with H 2 . D 2 /H 2 separation was exemplified using thermal desorption spectroscopy. D 2 /H 2 selectivity increased with Fe loading in Fe/ZSM-5 and a selectivity of 32.1 was obtained with an optimal loading of 7 wt%. The shift of desorption temperature supports the chemical affinity-based quantum sieving of D 2 over H 2 . This study demonstrates an effective strategy for enhancing D 2 /H 2 separation and the high selectivity means that Fe/ZSM-5 has strong potential in hydrogen isotope separation.
研究领域:
材料科学
·
物理化学
·
分离科学
·
催化化学
·
纳米材料
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Suyun Wang,Yuanbo Fang,Wuli Han,Qiang Li,Xiao Luo
For the first time, MIL-100(Fe)-derived microspheres with a hollow structure were perfectly constructed and used as a photocatalyst to decompose organic dyes under visible light irradiation. The prepared MIL-100(Fe)-NH2(20) could boost the separation, migration, and transfer of photoinduced carriers effectively, together with efficient photocatalytic performance. In simulated sunlight, the MIL-100(Fe)-NH2(20) exhibits the best degradation efficiency as well as excellent reusability and stability, and the degradation rate for rhodamine B (RhB) can be more than 99.5% within 80 minutes. Structural analysis proves that the porous MIL-100(Fe)-NH2(20) catalyst reaps an amazing hollow structure, large specific surface areas (2784.9 m2·g–1), and uniform distribution of Fe and N active phases. Besides, the enhanced visible light response and lower recombination rate of e––h+ pairs are both confirmed, and the band gap is significantly reduced to 2.53 eV. Finally, the photocatalytic mechanism and the possible degradation pathway were suggested. Owing to the enhanced photocatalytic activity, good tolerance to pH and water quality, and excellent stability, the MIL-100(Fe)-NH2(20) catalyst can be potentially used in a wide range of dye wastewater purifications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FIBERS AND POLYMERS
·
2022
·Vol. 23
·期 10
·2809-2819
·
IF 2.347
Yang Yuhui,Chen Hongbin,Zhang Ruquan,Huang Jingjing,Bai Zhikui,Xiao Shili
The ferric ions sludge produced during pollutants degradation was an obstacle for large scale application of Fenton oxidation technology. Herein, we reported a facile method using 2,2,6,6-tetramethylpiperidine-1-oxygen radical (TEMPO)-oxidized cotton fabric as a substrate for anchoring Fe(II) ions to produce Fe(II)-anchored cotton fabric. The formation of Fe(II)-anchored cotton fabric was confirmed using EDS analysis and FTIR measurement. Bath experiments indicated that Fe(II)-anchored cotton fabric could Fenton oxidize rhodamine B (RhB) dye in a high efficient rate (95.9 %) within 60 min without second pollution. Fe(II)-anchored cotton could be reused without any physical/chemical treatment and its decolorization efficiency was retained at 89.9 % even after the third cycle. Moreover, the decolorization behavior of Fe(II)-anchored cotton fabric for the RhB solution was affected by H 2 O 2 dosage, Fe(II) ion content, and inorganic salts. Kinetic study indicated that the RhB decolorization process fits a pseudo-first order well and the sorption isotherm assessment revealed that the reactive sorption of RhB dye on Fe(II)-anchored cotton fabric fits the Freundlich model.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF STRUCTURAL CHEMISTRY
·
2022
·Vol. 63
·期 4
·634-641
·
IF 1.004
Wu G. L.,Zheng C. Y.
Abstract [Fe III (OMe)(Hedtb)](ClO 4 ) 3 ·6.5CH 3 OH ( 1 ) and [Fe III (O n- Bu)(Hedtb)](ClO 4 ) 3 ·3 n -BuOH ( 2 ) (edtb = N,N,N′,N′-tetrakis[(2-benzimidazolyl)methyl]-1,2-ethanediamine) were prepared and display lipoxygenase activity. X-ray crystallography reveals that the Fe III centers in complexes 1 and 2 are ligated to three nitrogens of benzimidazole and two alkylamine nitrogen atoms from the edtb ligand, with a terminal alkyoxyl group occupying the sixth position. Complexes 1 and 2 both possess a Fe III –O R center ( R = Me, 1 ; n -Bu, 2 ) with Fe–O bond distances of 1.799(3) Å and 1.789(5) Å, respectively. The UV-Vis spectra and electrochemical properties of the complexes were recorded. Both complexes have strong absorption peaks at around 375 nm and display lipoxygenase activity.
研究领域:
生物无机化学
·
配位化学
·
酶催化
✓ 已验证
DOI
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.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2026
·Vol. 123
·期 5
·e2522028123
·
IF 9.1
Yongpeng Liang,Haochen Han,Yuewei Zhao,Wenjun Yu,Huiying Chen,Jiachuan Liu,Haojie Jin,Yangfan Xu,Wei Chen,Kun Qian,Xiangdong Yao,Lin Huang,Xiao-Ming Chen
Thymic epithelial tumors (TETs), rare yet clinically significant malignancies, face diagnostic challenges due to their occult presentation and lack of noninvasive risk-stratification tools, leading to systemic overtreatment and poor prognoses for high-risk subtypes. To address this unmet need, we developed a Fe3O4@Fe metal–organic framework heterojunction-enhanced laser desorption ionization mass spectrometry (LDI MS) platform for the efficient analysis of serum metabolic fingerprints (SMFs). Engineered through gradient pyrolysis, this nanomaterial synergizes ultraviolet absorption and photothermal conversion from its two constituent components with enhanced charge separation, achieving 1,000-fold improvement in sensitivity and thus enabling direct SMF acquisition from 1 μL of serum. Coupled with machine learning, the platform demonstrates robust diagnostic performance, yielding area under the curve (AUC) of 0.960 for distinguishing TETs from benign control and AUC of 0.856 for hierarchical risk stratification, outperforming clinical workflows. Beyond advancing material design for LDI MS, this work establishes a clinically translatable framework for rapid, large-scale screening, addressing critical gaps in TET management through metabolic-driven stratification.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）