APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiaqiao Yuan,Hongyu Lu,Xiang Gong,Mingjun Chen,Hao Lai,Shuming Wen,Shaojun Bai,Dandan Wu
The development of high-efficiency beneficiation processes for ilmenite has garnered widespread attention. This study proposed the utilize of a heterogeneous Fenton catalytic technology involving H 2 O 2 and Fe 2+ to enhance ilmenite flotation. The flotation results indicated that pre-oxidation of ilmenite with H 2 O 2 -Fe 2+ before adding collector could recover over 80 % of ilmenite from titanaugite. Electron Paramagnetic Resonance and slurry iron component concentration analyses revealed that the •OH generated within the ilmenite-H 2 O 2 -Fe 2+ catalytic system could oxidize Fe 2+ to Fe 3+ . The stronger binding capability of Fe 3+ with NaOL led to a remarkable discrepancy in floatability between ilmenite and titanaugite. Zeta potential analysis further confirmed that the oxidation degree of the ilmenite surface and the adsorption of iron species were higher than those of titanaugite. Additionally, Time-of-Flight Secondary Ion Mass Spectrometry and X-ray photoelectron spectroscopy analyses provided evidence for the selective activation of ilmenite by the H 2 O 2 -Fe 2+ . Furthermore, Density Functional Theory calculations revealed that the stable adsorption of Fe 2+ and Fe(OH) 2 + offered additional active sites on the ilmenite surface for NaOL adsorption. Moreover, the adsorption of •OH significantly affected the electronic spin density of the Fe 3d orbitals of Fe atom in ilmenite, and played a crucial positive in the surface activity of ilmenite.
研究领域:
矿物加工工程
·
化学工程
·
材料科学
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高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Wenjun Gong,Yating Pang,Chenyu Wang,Wenming Wang,Hong-Fei Wang
The dinitrosyl iron complex (DNIC) is a ubiquitous functional brick often used as a vehicle for the NO radical and chelatable iron pool, with a key role in chemical and biomedical applications. In this work, four DNICs modified with different thiolate bridging ligands (–SL) were synthesized. These complexes were characterized by 1H-NMR, electrospray ionization mass spectrometry, and X-ray crystal diffraction. Photoinduced NO release from the complexes in solution was further explored by time-resolved infrared and time-resolved electron paramagnetic resonance (EPR) spectra. The cluster complexes showed relatively lower cytotoxicity against the normal human liver cell line HL-7702 and higher cytotoxicity against human cervical cancer cells, with a selectivity index of 2.4–4.8. The cluster complexes with different L groups had different rates of NO release and protein binding constants. Moreover, NO released upon photoirradiation entered living cells, which were successfully imaged using an NO-selective fluorescent probe. The ferritin complex adducts further enhanced the cytotoxicity and cellular fluorescent intensity of NO, and the crystal structure revealed the coordination of the Fe(SL)2 unit with Cys102 of ferritin. This study provides insight into the photodynamic mechanism of nitrosyl iron−sulfur clusters to understand their physiological activity.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Caiwen Wu,Tianyi Guo,Yuhan Chen,Qiang Tian,Yanjuan Zhang,Zuqiang Huang,Huayu Hu,Tao Gan
Photoinduction is widely used to accelerate the Fe 3+ /Fe 2+ circulation in Fe 3+ /H 2 O 2 Fenton oxidation, however, the remained challenges in developing a facile, economical, and efficient synthetic methodology for the preparation of high-performance Fe-based Photo-Fenton catalyst and inevitably forming iron sludge limit its applications. Herein, starch-derived carbon (SC) encapsulated Fe 3 O 4 (Fe 3 O 4 @SC) magnetic nanocomposites are synthesized by mechanical activation treatment combined with high-temperature pyrolysis method using cassava starch as the carbon source. The photoelectrochemical properties of Fe 3 O 4 @SC are regulated by C O Fe bonds and oxygen vacancies in Fe 3 O 4 @SC, as well as graphitization of SC, which effectively accelerate the Fe 3+ /Fe 2+ circulation in Fe 3 O 4 @SC + H 2 O 2 system under visible light, thus Fe 3 O 4 @SC shows excellent catalytic performance and superior stability for the degradation of tetracycline hydrochloride, and the initiation rate constant is 2.4 times higher than that in dark. Moreover, quenching experiments and electron spin resonance results confirm that OH, O 2 − , and h + ( OH plays a critical role) are generated in the catalytic system of Fe 3 O 4 @SC + H 2 O 2 + visible light. This work provides new insights into a green and facile approach for the synthesis of Photo-Fenton catalysts, providing new avenue for the acceleration of Fe 3+ /Fe 2+ cycle under visible light-driven Fenton process.
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MICROCHEMICAL JOURNAL
·
2018
·
IF 2.746
Xue Gong,Heyang Zhang,Nan Jiang,Lin Wang,Guang Wang
An oxadiazole-based chemosensor (sensor 1) for Fe 3+ /Fe 2+ was successfully designed and synthesized. Sensor 1 displayed fluorescence quenching response towards both Fe 3+ and Fe 2+ in THF:H 2 O (4:1, v/v) solvent with high selectivity and sensitivity over all other competitive metal ions . Job's plot, mass spectra, DFT calculation and fluorescence titration disclosed that fluorescence quenching was caused by forming 1:1 complex between sensor 1 and iron ions . Sensor 1 presented high sensitive fluorescence response at the pH value of human body and its fluorescence intensity showed linear relationship with the concentration of iron ion. Sensor 1 also presented fast fluorescence response towards iron ions and the lower detection limit, 7.78 μM for Fe 2+ ion and 6.95 μM for Fe 3+ ion, respectively. Sensor 1 can be used as test strips to detect iron ions in water samples. Fluorescence cell imaging also demonstrated sensor 1 can recognize iron ions in living cells.
研究领域:
分析化学
·
生物医学
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高影响因子
Polymers
·
2022
·Vol. 15
·期 1
·216
·
IF 4.967
Xinxin Wang,Xinyu Zu,Ting Wang,Yanan Zhao,Yan Liang,Xiaochen Wang,Qian Chai,Yunjuan Zhang,Hongzhong Chen,Hua Wang
Lactoferrin (LF) is an iron-binding glycoprotein with various biological activities that has been extensively used in food and medical applications. Several methods for detecting LF have been reported, but they still face challenges in terms of sensitivity and simplicity of detection. To achieve an accurate and efficient detection of LF, we developed a method for the determination of LF in lactoferrin supplements using carbon dots (CDs) fluorescent probes. The N, S-doped PPI carbon dots (N, S-PPI-CDs) were prepared using a protein (peanut protein isolate) and cysteamine as precursors. The prepared N, S-PPI-CDs exhibited intense blue fluorescence and good biocompatibility, while the fluorescence intensity of the N, S-PPI-CDs showed a good linear relationship with Fe2+/Fe3+concentration (0–2 μM). The N, S-PPI-CDs exhibited a high potential ability to rapidly detect Fe2+/Fe3+within 30 s, with a limit of detection (LoD) of 0.21 μM/0.17 μM. Due to the reversible binding of LF to Fe, the N, S-PPI-CDs showed a high sensitivity and selectivity for LF, with a limit of detection (LoD) of 1.92 μg/mL. In addition, LF was quantified in real sample LF supplements and showed a fluctuation in recovery of less than 2.48%, further demonstrating the effectiveness of the fluorescent N, S-PPI-CDs sensor.Keywords:N, S-PPI-CDs;fluorescence probe;biocompatibility;Fe2+/Fe3+detection;lactoferrin supplement detection
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PubMed
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2022
·Vol. 39
·期 12
·3323-3333
·
IF 3.146
Liu Dong-yan,Lou Wen-bo,Sun Shi-neng,Zhang Yang,Zhang Ying,Zheng Shi-li
The recovery of iron phosphate involves the addition of oxidizer to oxidize Fe 2+ in the spent LiFePO 4 (LFP) material to Fe 3+ and the agent commonly used is hydrogen peroxide (H 2 O 2 ). Nevertheless, H 2 O 2 has disadvantages of high price, easy decomposition and low utilization efficiency. In this manuscript, a facile method is proposed for efficient synergistic oxidation of Fe 2+ in spent LFP leachate with a mixture of oxygen and ozone. Specifically, we found by thermodynamic computations that the dominant oxidation groups of ozone during oxidation varied with acidity. The oxidation would produce a large number of iron-phosphate complex groups (Fe 3 H 6 (PO 4 )
3+ 4
, FeH 8 (PO 4 )
− 4
and Fe 2 HPO
4+ 4
) in the phosphorus-sulfur mixed acid system, leading to a paradoxical pH drop. The optimized conditions for H 2 O 2 oxidation were explored. It was determined experimentally that oxidation by gas mixture and O 2 belonged to the firstorder and second-order reactions with activation energies of 28.68 kJ/mol and 34.61 kJ/mol, respectively, which were both controlled by a mixture of chemical reaction and diffusion. The optimized oxidation method was finally determined by evaluating the cost and oxidation rate of the oxidizers. The results in this study offer a promising method for new low-cost and efficient Fe 2+ oxidation for industrial production.
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高影响因子
International Heart Journal
·
2024
·
IF 1.2
Xiaoyu Shen,Jiamei Zhang,Zhou Zhou,Ruiqun Yu
Cardiomyocyte lipotoxicity and ferroptosis are the key to the development of diabetic cardiomyopathy (DCM). Perilipin 5 (PLIN5) is perceived as a significant target of DCM. This study aimed to focus on the role and mechanism of PLIN5 on lipotoxicity and ferroptosis in DCM.Following transfection, mouse cardiomyocytes HL-1 were induced by 0.1 mM palmitic acid (PA) to set up lipotoxic cardiomyocyte models. The cell viability and lipid accumulation were evaluated by cell counting kit-8 assay and Oil red O staining, respectively. Ferrous ion (Fe2+), glutathione (GSH), malondialdehyde (MDA), and reactive oxygen species (ROS) levels were determined to verify the effects of PLIN5 or Pirin (PIR) on ferroptosis. Quantitative real-time reverse transcription polymerase chain reaction or Western blot was performed for quantitative analysis.PLIN5 overexpression promoted the viability, GSH level, and expression of GPX4/PIR/intracellular P65, yet suppressed lipid accumulation, level of Fe2+/MDA/ROS, and expression of interleukin (IL) -1β/IL-18/intranuclear P65 in PA-stimulated HL-1 cells. PIR silencing counteracted the roles of PLIN5 overexpression in PA-stimulated HL-1 cells.PLIN5 suppresses lipotoxicity and ferroptosis in cardiomyocyte via modulating PIR/NF-κB axis, hinting its potential as a therapeutic target in DCM.
研究领域:
心脏病学
·
细胞生物学
·
分子生物学
·
糖尿病
·
病理学
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DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Yingying Chen,Zhihua Liu,Jinshan Liu,Miao Zhou,Zhifeng Liu
The visible-light-driven photoelectro-Fenton technology integrates the synergistic advantages of photoelectrocatalysis and the Fenton reaction. However, the design of current photoanode materials still suffers from issues such as low interfacial charge transfer efficiency and insufficient exposure of active sites. In this study, a novel S-scheme ZnIn 2 S 4 /α-Fe 2 O 3 heterojunction photoanode was successfully constructed. The built-in electric field established at the S-scheme heterointerface effectively facilitates the spatial separation of photogenerated charge carriers. The S O bonds formed at the two-phase interface serve as atomic-level electron transport channels, enabling rapid and directional transfer of photogenerated electrons enriched in the conduction band of ZnIn 2 S 4 to the Fe 3+ sites on the α-Fe 2 O 3 surface, where Fe 3+ is reduced to Fe 2+ . The generated Fe 2+ promotes the conversion of H 2 O 2 to produce hydroxyl radicals (·OH), while the regenerated Fe 3+ from the reaction is again reduced to Fe 2+ by photogenerated electrons, establishing a self-sustaining cycle that endows the system with highly efficient oxidative degradation capability. The results demonstrate that the synergistic mechanism leads to a 5.55-fold increase in the degradation rate. Benefiting from the efficient directional charge transfer and separation, the total organic carbon (TOC) removal efficiency reaches 80.09% within 60 min.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Junkai Hao,Hanning Song,Shuo Sun,Jing Feng,Hongben Zhang,Xuewan Zhang,Xuejiao Ren,Zhengquan Yan,Lei Hu
To improve the sensitivity and selectivity for S 2− and Fe 2+ detection in complex agricultural products, ultra-small nano CeO 2 /CuO doped carboxylated chitosan fibers (CeO 2 /CuO CCF) was constructed under microwave-assisted conditions. Not only did CeO 2 /CuO CCF possess suitable BET specific surface area, superior stability and synergistic-enhancement oxidase-like activity, trace S 2− or Fe 2+ could selectively change its oxidase-like activity accompanying with visible color changes. Under the optimized conditions, there express specific double ratiometric colorimetric linear relationships between lg( A 729 / A 343 )/lg( A 415/ A 343 ) and c S 2− or c Fe 2+ with large linear ranges. When applied for visual monitoring of S 2− and Fe 2+ in real agricultural products, the detection limits were low to 3.5 × 10 −9 mol·L −1 and 9.4 × 10 −8 mol·L −1 respectively, far below the permitted values in drinking water by World Health Organization. The mechanisms for synergistic-enhancement oxidase-like activity for CeO 2 /CuO CCF to selectively recognize S 2− and Fe 2+ were proposed. This work will provide an efficient way for visual monitoring of multiple analytes in complex agricultural products.
研究领域:
材料科学
·
环境科学
·
分析化学
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JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Dongliang Wang,Jingping Hu,Bingchuan Liu,Huijie Hou,Jiakuan Yang,Yuxiao Li,Yi Zhu,Sha liang,Keke Xiao
The electrogeneration of H 2 O 2 and electro-regeneration of ferrous are conflicting matters in electro-Fenton system. In this research, the degradation of Rhodamine B, methyl orange (MO) and 4-chlorophenol (4-CP) was investigated using a novel dual-cathode microbial fuel cell (MFC) electro-Fenton (EF) hybrid system. An air-cathode of an EF system was used for H 2 O 2 electrogeneration and a carbon felt cathode of a MFC was used to accelerate Fe 2+ regeneration. Synergistic improvement of MFC power generation and the degradation of the above refractory organics through EF reaction was achieved. The EF air-cathode was fabricated by adopting activated carbon/graphite powder mixture and PVDF binder, which showed higher H 2 O 2 generation but slower Fe 3+ reduction rate than MFC carbon felt cathode. The Rhodamine B removal rate constant and mineralization current efficiency of the MFC coupled EF were 64% and 42% higher than that of uncoupled EF, respectively. The MFC-EF coupled system also exhibited significantly higher removal efficiency for MO and 4-CP than that of un-coupled EF system. Moreover, the power density of MFC was greatly enhanced by coupling EF due to higher Fe 3+ /Fe 2+ redox potential than oxygen reduction.
研究领域:
环境科学
·
电化学工程
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DOI
PubMed
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
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Guanwei Peng,Yanyu Xie,Ying Wang,Qi Yu,Youyi Huang,Shuwu Liu,Limin Lu
Peroxymonosulfate (PMS)-assisted photocatalytic processes are economical and green strategies for the treatment of pesticide pollution. However, its degradation efficiency is severely hindered by the sluggish kinetics of active centers regeneration and low charge-transfer. Herein, S-scheme Bi 2 Fe 4 O 9 /BiOBr heterogeneous material was designed to activate PMS for thiabendazole (TBZ) degradation. Bi 2 Fe 4 O 9 and BiOBr have similar structural unit of [Bi 2 O 2 ] 2+ to share the Bi-O bonds, which is favorable to form asymmetric interface and enhance the polarization. Based on these unique characteristics between Bi 2 Fe 4 O 9 and BiOBr, a robust internal electric field in the S-scheme heterojunction is built, which could provide driving force to boost the electron-transfer process and encourage the sustainable regeneration of Fe 2+ . After optimizing the proportion of Bi 2 Fe 4 O 9 on the composite, it was found that 50 wt% Bi 2 Fe 4 O 9 /BiOBr (BFB-50) exhibits the best TBZ removal efficiency after 30 min visible light irradiation, which is 2.25 and 12 folds compared to Bi 2 Fe 4 O 9 and BiOBr, respectively. Furthermore, electron paramagnetic resonance (EPR) and radical trapping experiments indicate that 1 O 2 and SO 4 •- involving oxidation mechanism impart maximum contribution towards TBZ degradation. The possible pathways of TBZ degradation are reasonably proposed by the HPLC-MS and the toxicity evolution of TBZ is appraised using the ECOSAR software. This study provides an insight into the fabrication of S-scheme heterojunction for environment remediation through the photocatalysis/sulfate-mediated advanced oxidation process.
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