FOOD CHEMISTRY
·
2023
·
IF 8.8
Yu-Han Sun,Liu Yang,Xian-Xian Ji,Yuan-Zhen Wang,Yu-Long Liu,Ying Fu,Fei Ye
Flusilazole is a triazole fungicide with residues that are potentially toxic to humans. It enters the human body mainly through food, although its bactericidal activity is substantial. In this study, an electrochemical sensor Fe/Fe 2 O 3 @C with a core–shell structure was constructed to efficiently detect flusilazole by annealing MIL-53(Fe) which was prepared by a simple solvothermal method. Transmission electron microscopy and scanning electron microscopy were used to characterize the apparent morphology of MIL-53(Fe) and Fe/Fe 2 O 3 @C , and their structures were further characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, powder X-ray diffraction, and the mapping of elements by energy dispersive spectroscopy. The electrochemical behavior of Fe/Fe 2 O 3 @C in the detection of flusilazole was evaluated by differential pulse voltammetry under optimal conditions. The results of the study indicate that the Fe/Fe 2 O 3 @C electrochemical sensor displayed excellent detection capabilities for flusilazole, where the sensor exhibited a wide detection range from 1.00 × 10 −4 to 1.00 × 10 −12 mol/L with an incredibly low LOD of 593 fM, making it highly sensitive to trace amounts of flusilazole. Moreover, Fe/Fe 2 O 3 @C demonstrated superior reproducibility, stability, and resistance to interference, highlighting its reliability in practical applications. The sensor was also successfully utilized to quantitatively detect flusilazole in various real samples, which suggests that Fe/Fe 2 O 3 @C has broad-spectrum environmental resistance and can effectively and rapidly detect flusilazole residues in different types of food items and environmental matrices. The study also delved into the mechanism of Fe/Fe 2 O 3 @C for the detection of flusilazole, providing a deeper understanding of the functionality of this sensor. Overall, these findings emphasize the practical significance of Fe/Fe 2 O 3 @C as an electrochemical sensor, showcasing its potential for real-world applications in food safety and environmental monitoring.
研究领域:
分析化学
·
食品安全
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Tong Zhang,Yuan Chen,Tao Wang,Chang Liu,Dan He,Bin Liu,Yuanyuan Liu
Advanced oxidation processes are widely used to remove petroleum hydrocarbons from soil, but usually consume large quantities of ferrous and acidify the soil. This study tested an advanced oxidation approach based on percarbonate in laboratory experiments. It removed 88% petroleum hydrocarbons in soil with a pH increase from 8.2 to 10.2. ·OH and ·CO 3 - were the main reactive species, and degraded 41% and 37% PHCs from soil respectively. The o-dihydroxybenzene structure in catechin was found to reduce ferric to ferrous, and prolong the generation of ·OH from 120 s to over 1800 s. The petroleum hydrocarbons were degraded to intermediates including alkanes and olefins through hydrogen-abstraction by ·OH and ·CO 3 - , and by dimerization and β-scission of alkyl radicals. These intermediates were then oxidized to CO 2 and H 2 O by ·OH and ·CO 3 - . The main residual intermediates in the soil were low-molecular-weight n-alkanes and branched alkanes, and they were found to inhibit the growth of oats ( Avena sativa L. ) much less than the original petroleum hydrocarbons. These findings provide a fundamental basis for designing effective technologies which use percarbonate to remove organic pollutants .
研究领域:
环境科学
·
土壤修复
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Cheng Hou,Jiang Zhao,Libin Yang,Jiabin Chen,Xuefen Xia,Xuefei Zhou,Yalei Zhang
A single-atom Fe-N-C catalysts (Fe-N-C) was successfully prepared through a facile synthesis route using microalgae to drive hydrogen peroxide (H 2 O 2 )-based Fenton-like reactions. The detailed characterization analyses confirmed the simultaneous presence of Fe/Fe compounds and Fe-N x coordination sites in the optimal catalyst (Fe-N @ MBC) obtained through the pyrolysis of FeCl 3 ·6 H 2 O and Chlorella vulgaris . Surprisingly, when applied in H 2 O 2 -based advanced oxidation processes (AOPs), Fe-N @ MBC demonstrated excellent proficiency for both H 2 O 2 and O 2 activation, with the contribution of the original dissolved oxygen for sulfamethoxazole removal reaching up to 47.59%. The experiment and density functional theory (DFT) calculation results indicated that the Fe/Fe compounds significantly boosted the activity of Fe-N x by lowering the energy barrier of the reactive oxygen species formation and promoting the electron transfer between Fe-N x and the oxidants (H 2 O 2 and O 2 ). These findings provide new insights into the facile synthesis, rational design, and catalytic mechanisms of Fe-N-C used in H 2 O 2 -based AOPs.
研究领域:
环境科学
·
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 73
·46215-46220
·
IF 3.108
Youzhi Wang,Yurun Feng,Xue Guo,Yu Liu,Hongyu Gong
Fe-doped polymer-derived SiCN ceramics were synthesized by a precursor conversion method with different contents of nano-Fe2O3. The phase composition and microstructure were characterized by XRD, SEM and TEM. The results revealed that α-Fe and graphite phases were generated during the synthetic process. The electromagnetic and wave absorbing properties of the Fe-doped SiCN ceramics were analyzed with different amounts of nano-F2O3 over the frequency range of 2–18 GHz. The existence of α-Fe and graphite phases improved the electromagnetic properties of the materials greatly. The reflectance and electromagnetic attenuation coefficient of Fe-doped SiCN ceramics (15 wt% F2O3) reached −11 dB and 325 at 10.5 GHz, respectively, which indicated that the Fe-doped SiCN ceramics possessed excellent absorbing properties.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Haoran Dong,Yujun Cheng,Yue Lu,Kunjie Hou,Lihua Zhang,Long Li,Bin Wang,Yaoyao Wang,Qin Ning,Guangming Zeng
This study examined the toxicities of Fe/Ni and starch-stabilized Fe/Ni (S-Fe/Ni) nanoparticles (NPs) toward Escherichia coli . The inactivation of E. coli by Fe/Ni NPs was concentration- and time-dependent. Fe/Ni NPs exhibited a stronger toxicity than the bare Fe 0 NPs (i.e., Ni = 0 wt%), revealing that the loading of Ni increased the toxicity of Fe 0 NPs. However, there was no positive correlation between Ni content and the toxicity of Fe/Ni NPs when Ni content increased from 1 wt% to 5 wt%. The starch coating could alleviate the toxicity of Fe/Ni NPs, depending on starch concentration. Transmission Electron Microscopy analysis demonstrates that membrane disruption and cellular internalization of NPs occurred for E. coli after exposure to the Fe/Ni NPs. The NPs might have reacted with the carboxyl, ester and amine groups on the cell surface, as indicated by the Fourier Transform Infrared Spectroscopy analysis. However, the S-Fe/Ni NPs did not cause obvious membrane disruption of the cells due to the effect of starch coating, which inhibited the close contact of NPs with cells by providing electrostatic repulsion and steric hindrance. Besides, the addition of N-Acetyl-L-cysteine, as a potent scavenger for reactive oxygen species (ROS), remarkably reduced the toxicities of both Fe/Ni and S-Fe/Ni NPs, which indicated that the ROS-induced oxidative stress should be the primary mechanism for the inactivation of E. coli . The aging experiments evidenced that both Fe/Ni and S-Fe/Ni NPs would lose their toxic potential over time, posing less threat to the environment in the long term.
研究领域:
微生物学
·
环境科学
·
纳米生物学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Huihui Liu,Jiaying Yan,Yanlin Wu,Caixia Yan,Minghua Nie,Wenbo Dong
Sinapic acid (SA) as an environmentally friendly natural phenolic acid, has the properties of antioxidant because of containing –OH and –OCH 3 on the benzene ring and it is safe. The Fe(III)/peroxymonosulfate (PMS) system modified by SA for enhancing micropollutant degradation had been studied, while weather SA could improve micropollutant degradation in other Fe(III)/oxidants systems was still unclear. The Fe(III)/hydrogen peroxide (H 2 O 2 ) and Fe(III)/peroxydisulfate (PDS) systems modified by SA for micropollutants degradation were studied, the results indicated that SA could enhancing micropollutants degradation by accelerating the Fe(III)/Fe(II) cycle in both systems. In addition, the PMS, the H 2 O 2 and the PDS systems were compared, and ten micropollutants commonly present in natural water were selected to evaluate the oxidation capacity of different systems. The PMS and PDS systems have higher oxidation degradation capacity for ten micropollutants than that of H 2 O 2 system, attributed to the SO 4 •− , HO • and Fe(IV) all contributing to micropollutants degradation. However, in the H 2 O 2 system, ten micropollutants degradation almost entirely relied on HO • . In the PMS and PDS systems, the SO 4 •− played a dominated role for micropollutants removal, attributed to its higher steady-state concentration than HO • and its higher second-order reaction rate with micropollutants than Fe(IV). Economic evaluation indicted that the H 2 O 2 system was more cost-effective than the PMS and PDS systems for micropollutants removal. This was because the cost of H 2 O 2 was lower than PMS and PDS, and concentration of Fe(III), oxidants and SA requirements in the H 2 O 2 system were lower than that in the PMS and PDS systems. Overall, this study provided an economical and environmental-friendly method for the efficient treatment of harmful micropollutants in wastewater.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shi-Wen Lv,Qiuyu Zheng,Lingjie Ye,Chun-Yang Li,Jing-Min Liu,Yanqing Cong,Shuo Wang
Nowadays, simultaneous removal of organic pollutants and heavy metals from wastewater is still a complicated task with great challenge. Herein, a newly-designed Fe-g-C 3 N 4 /α-Fe 2 O 3 composite with an active N-Fe-O bridge was prepared by coupling Fe-doped g-C 3 N 4 (namely Fe-g-C 3 N 4 ) and α-Fe 2 O 3 . Interestingly, the combination of Fe-g-C 3 N 4 with α-Fe 2 O 3 broadened the light absorption region and restrained the photoinduced electron-hole pair recombination. Meanwhile, elaborate construction of N-Fe-O bridges based on coordination interaction can reduce electrochemical impedance and facilitate electron transfer, thereby prolonging the charge lifetime. As expected, the Fe-g-C 3 N 4 /α-Fe 2 O 3 composite displayed excellent photocatalytic performance in simultaneous removal of tetracycline (TC) and Cr(VI). More importantly, Fe-g-C 3 N 4 /α-Fe 2 O 3 -mediated electron transfer from TC to Cr(VI) also played an essential role on TC oxidation and Cr(VI) reduction under visible light. Both experimental analyses and theoretical calculations revealed that the migration route of photogenerated carriers followed a direct Z-scheme heterojunction mechanism under built-in electric field. The Fe-g-C 3 N 4 /α-Fe 2 O 3 composite with great stability also displayed promising practical application potential. In short, the current work not only provided a highly-efficient photocatalyst with N-Fe-O bridges but also shared new insights into the simultaneous removal of organic pollutants and heavy metals.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Energy Advances
·
2024
·
IF 3.2
Kunpeng Liu,Xu Wang,Nan Wang,Ruiyong Zhang,Meinan Yang,Baorong Hou,Wolfgang Sand
Rationally designing high-efficiency catalysts for electrochemical two-electron water oxidation reaction (2e− WOR) to produce hydrogen peroxide (H2O2) is extremely important, while designing bimetallic metal–organic frameworks (MOFs) is of great significance for effective 2e− WOR. Herein, MIL-53(Fe) and different proportions of Co-doped MIL-53(Fe) were prepared by a hydrothermal method. The structural characterization and elemental analysis showed that the Co ions were successfully doped into MIL-53(Fe) to form a MIL-53(Fe/Co) bimetallic MOF, and the morphology of MIL-53(Fe/Co) became more regular after Co doping. We found that the optimized MIL-53(Fe/Co) exhibits remarkable 2e− WOR performance, which gave an overpotential of 150 mV at 1 mA cm−2. The overpotential of MIL-53(Fe/Co) was approximately 220 mV (at 1 mA cm−2) lower than that of MIL-53(Fe), which may be attributed to the change of microstructure of MIL-53(Fe) after Co doping and the synergistic effect between Fe/Co. Our work introduces a strategy for designing bimetallic MOF-based electrocatalysts, opening up new possibilities for efficient 2e− WOR systems.
研究领域:
材料科学
·
电催化
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yiyang Lin,Tao Lin,Han Chen,Junding Yin
The effect of N , N -bis(carboxymethyl)glutamic acid (GLDA) on the removal of organic pollutants by Fe(II)-mediated periodate (PI) advanced oxidation process at neutral pH was investigated, in which N-(1,3-dimethylbutyl)- N ′-phenyl- p -phenylenediamine quinone (6PPD-Q) was used as the model pollutant. The results showed that the Fe(II)-GLDA complex formed by mixing GLDA with Fe(II) in a 1:1 ratio reacted with PI can degrade 6PPD-Q effectively. The presence of GLDA alters the redox potential of Fe(II)/Fe(III), which allows for a better utilization of Fe(II) under the synergistic effect of ultraviolet (UV) irradiation. Based on quenching experiments, sulfoxide probe transformation and electron spin resonance (ESR) signals, the reactive species that play a major role in this process are Fe IV O and IO 3 . The degradation products of 6PPD-Q were detected by Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry (UPLC-MS/MS) and two possible degradation pathways were proposed based on density functional theory (DFT) calculations. The toxicity of 6PPD-Q was found to be effectively reduced after degradation by Ecological Structure Activity Relationships (ECOSAR) software analysis and zebrafish experiments. This study provides some fundamental insights for the removal of organic pollutants by GLDA-enhanced Fe(II)/PI system under neutral conditions.
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Bin Nie,Haojun Dong,Jincan Yan,Shengyu Zhang,Shuang Zhong
The activation of peroxymonosulfate (PMS) by heterogeneous catalysts presents an exciting but challenging strategy for degrading persistent organic pollutants in water. Iron oxychloride (FeOCl) is considered a promising heterogeneous catalyst due to its unique oxygen bridge structure, which could render it more active by facilitating the iron valence transitions between Fe(II) and Fe(III). However, the limited Fe(II)/Fe(III) conversion cycle rate hinders its catalytic activity, leading to unsatisfactory PMS activations in practical applications. Herein, we demonstrated the performance and the mechanistic pathway of enhanced FeOCl (CNFeOCl) catalytic activation using a graphitic carbon nitride (g-C 3 N 4 ) with a unique electronic structure as a carrier employing 2,4-dichlorophenol (2,4-DCP) as a representative pollutant. The CNFeOCl/PMS system achieved complete degradation of 2,4-DCP (30 mg/L) in a short time (<5 min), whereas the FeOCl/PMS system degraded only 35.98% under the same conditions. The high 2,4-DCP degradation rate of CNFeOCl was due to its improved Fe(II)/Fe(III) ratio (34.34%/40.03%), increased specific surface area (30.32 m 2 /g), and reduced charge-transfer resistance. Combining a series of characterizations, electron spin resonance (ESR) detection, and quenching experiments, the investigations elucidated the enhanced catalytic activation mechanism of CNFeOCl which includes dominant reactive oxygen species (ROS) generation and some key factors that generally affected the efficiency of oxidative degradation. We believe this study offers new insights into the intrinsic role of g-C 3 N 4 supported FeOCl for PMS activation and provides theoretical support to guide the rational design for developing efficient iron-based catalysts toward heterogeneous catalysis.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Zijun Dong,Chengchun Jiang,Jingxin Yang,Xi Zhang,Weili Dai,Pengwei Cai
This work investigates the transformation of iodide (I − ) by Fe(II)-activated peroxydisulfate (PDS). The transformation of I − into iodate (IO 3 − ) is a two-step process, involving reactive iodine species, such as hypoiodous acid (HOI), as a key intermediate, and IO 3 − as the final product. In the first step, SO 4 •- produced by Fe(II)-activated PDS is mainly responsible for the transformation of I − into HOI. In the second step, Fe(IV) formed by the reaction of Fe(III) with PDS is required, to facilitate the further oxidation of HOI to IO 3 − . The disproportionation of HOI and the oxidation by PDS alone contribute negligibly to IO 3 − formation. The IO 3 − yield increases to a maximum, before decreasing gradually, with increased PDS and Fe(II) dosages. The transformation of I − into IO 3 − is favored by lower pH and higher temperature, due to the greater SO 4 •- production by the reaction of Fe(II) with PDS under these conditions. Humic acid , as a representative natural organic matter, scavenges the formed HOI to form iodinated disinfection byproducts , which largely inhibit the transformation of I − into IO 3 − . In addition, the transformation of I − into IO 3 − and iodinated disinfection byproducts by Fe(II) activated PDS was confirmed in the natural waters.
研究领域:
环境化学
·
水处理
·
高级氧化过程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Danni Deng,Rong Chen,Qianqian Zhong,Binbin Xiong,Jia Deng,Na Zhang,Shiwei Xie
Bicarbonate ions (HCO 3 − ), commonly present in natural water sources, exert complex influences on peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs). This study investigates the role of HCO 3 − in a novel electrochemical system using a stainless-steel scrubber cathode (SSSC) for PMS activation. The buffering effect of HCO 3 − shifts the dominant Fe(II) species from dissolved Fe 2+ ions to surface-bound Fe(II) (≡Fe(II)) within the HCO 3 − /PMS/SSSC system. Furthermore, HCO 3 − promotes ≡Fe(II)/≡Fe(III) redox cycling on the SSSC surface. These synergistic effects significantly enhance PMS activation, generating singlet oxygen ( 1 O 2 ) and Fe IV O as the primary oxidants responsible for BPA degradation. Identification of degradation intermediates elucidated two dominant pathways: hydroxylation and radical coupling. Toxicity assessment of these intermediates confirmed reduced environmental risks. The SSSC exhibited long-term stability and effective performance in real water matrices, demonstrating its practical applicability.
研究领域:
环境科学
·
电化学
·
水处理
·
高级氧化技术
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）