MARINE POLLUTION BULLETIN
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2026
·
IF 4.9
Phuoc-Cuong Le,Dinh Nhi Bui,Xuan Kien Bui,Dinh Ngo Vu,Van Chau Dinh,Thi Thao Minh,Tan Nhat,Ken Kawamoto
A multifunctional zwitterionic–catechol polymer with dynamic Fe 3+ coordination is developed. • The coating achieves ultrahigh impedance (∼10 9 Ω·cm 2 ) and low corrosion current (∼10 −9 A·cm −2 ). • Rapid intrinsic self-healing enables ∼90% recovery at 24 h and ∼95% at 48 h. • Chloride diffusion is strongly suppressed (D ≈ 1.8 × 10 −15 m 2 ·s −1 ) with delayed penetration. • Synergistic mechanism integrates hydration layer, coordination bonding, and dynamic repair. The long-term degradation of metallic structures in marine environments is mainly driven by chloride-induced corrosion and mechanical damage, which severely limits the durability of conventional polymer coatings. Herein, we report a multifunctional zwitterionic-catechol polymer coating (DZCP-Fe) that integrates hydration-mediated ion regulation, catechol interfacial adhesion, fluorinated barrier contribution, and dynamic Fe 3+ -catechol coordination. The coating exhibits a dense morphology, enhanced hydrophobicity, and strong adhesion. Electrochemical measurements show an impedance modulus up to ∼10 9 Ω·cm 2 and a reduced corrosion current density in the 10 −8 –10 −9 A·cm −2 range. After scratching, DZCP-Fe achieves ∼90% crack closure within 24 h and ∼95% after 48 h, accompanied by substantial electrochemical recovery. Chloride-transport analysis shows a strongly suppressed effective diffusion coefficient (∼1.8 × 10 −15 m 2 ·s −1 ) and delayed ion penetration. These results demonstrate that the integrated hydration–adhesion–coordination strategy provides a robust route toward intrinsic self-healing and chloride-resistant marine anticorrosion coatings. Download: Download high-res image (716KB) Download: Download full-size image
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Qinnan Yang,Fei Kong,Ziyi Liu,Anxing Jian,Yue Wang,Yong He,Xiaoli Li,Bingquan Chu
Acetyl-CoA (AcCoA) functions as a pivotal metabolic node that regulates diverse cellular pathways in organisms (e.g., microalgae). Real-time monitoring of intracellular metabolites is essential for elucidating complex biological processes. However, conventional methods for AcCoA detection often suffer from limitations, including cumbersome procedures, substantial matrix interference, dependence on advanced instrumentation, and inadequate sensitivity for trace-level analysis in biological matrices. To address these challenges, this study developed a fluorescent switch biosensor for AcCoA detection based on iron ion (Fe 3+ )-mediated fluorescence modulation. The sensor utilizes nitrogen-doped carbon dots (N-CDs) synthesized through pyrolysis of sodium alginate and melatonin. The resulting amorphous N-CDs (average diameter: 3.75 nm) exhibit strong blue fluorescence. The biosensor demonstrates high sensitivity and selectivity, achieving a linear detection range of 1–200 μM with a LOD of 0.268 μM. Moreover, owing to the low cytotoxicity and rapid response of the N-CDs, the system enabled real-time monitoring of AcCoA in live microalgal cells, showing a linear fluorescence response in Ochromonas sp. cultures across volumes ranging from 0.8 to 10 mL. This work provides a robust and biocompatible platform with significant potential for advancing AcCoA-related biological research.
研究领域:
分析化学
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生物化学
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纳米生物技术
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代谢组学
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环境微生物学
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MACROMOLECULAR BIOSCIENCE
·
2025
·
IF 4.1
Wei Wang,Jinghang Li,Yaodong Di,Shuai Yang,Youfa Wang,Lesan Yan
Chemodynamic therapy (CDT) is an innovative cancer treatment strategy that leverages Fenton or Fenton-like reactions to convert hydrogen peroxide (H 2 O 2 ) in the tumor microenvironment (TME) into highly cytotoxic hydroxyl radicals (•OH). However, the therapeutic efficacy of CDT against tumor cells is limited by two primary constraints: 1) insufficient H 2 O 2 levels in the TME, which restricts •OH generation; and 2) elevated concentrations of reduced glutathione (GSH) in the TME, which neutralizes excess reactive oxygen species (ROS). To address these challenges, this study developed a nanoplatform based on mixed micelles composed of two distinct polycarbonate materials. One polycarbonate is conjugated with cinnamaldehyde (CA) via side chains to form a polymeric prodrug, enabling pH-responsive release of CA. The other polycarbonate chelates Fe 3+ through side-chain carboxyl groups to initiate Fenton-like reactions. In the acidic TME, the mixed micelles release CA, which elevates intracellular H 2 O 2 levels, thereby overcoming the limitation of inadequate H 2 O 2 supply in tumor cells. Simultaneously, the Fe 3+ complex within the micelles depletes GSH, reducing it to Fe 2+ , which triggers Fenton-like reactions that amplify ROS production, thus enhancing CDT efficacy. Additionally, pH-triggered disassembly of the micelles in the acidic TME releases encapsulated doxorubicin (DOX), which induces tumor cell apoptosis by damaging DNA, further augmenting antitumor therapeutic outcomes. The nanocarrier developed in this study integrates a synergistic strategy of “H 2 O 2 elevation and Fenton-like reaction” with chemotherapy, significantly improving tumor cell eradication and demonstrating substantial potential for cancer treatment.
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MOLECULES
·
2025
·Vol. 30
·期 21
·4188
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IF 4.6
Chunhua Zhu,Jie Yao,Meng Du,Henghui Xu,Jintao Yu,Haotian Zhu,Zeyu Zhou,Jubing Zhang
As a conceptual study for low-energy hydrogen production, potentially coupled with off-grid photovoltaics, this work focuses on overcoming the constraint of the oxygen evolution reaction (OER), which features a high anode potential and significant overpotential. To reduce energy consumption, the Fe2+oxidation reaction is employed to replace OER, coupled with Fe2+regeneration using natural biomass. Experimental results reveal that Fe2+oxidation reaction is an effective substitute, with an initial oxidation potential of 0.5 V (vs. Hg/Hg2SO4), much lower than that of OER. Fe2+regeneration is notably influenced by both biomass type and reaction temperature. Chlorella pyrenoidosa (CP) achieves the highest Fe3+reduction rate of 90.5% at 190 °C. Water-soluble organic compounds generated during biomass oxidation exert a negative impact on Fe2+electrooxidation by accumulating on or coating the electrode surface, and the compounds derived from CP exert a less detrimental effect. Moreover, enhancing magnetic stirring, elevating temperature, and selecting an appropriate anode material can significantly boost the oxidation reaction. Under optimized conditions, the current density during electrolysis of CP filtrate at 1.1 V reaches 280 mA/cm2, much higher than values reported in similar studies. This highlights the great potential of this co-electrolysis approach for efficient hydrogen production driven by off-grid photovoltaic power.
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DYES AND PIGMENTS
·
2025
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IF 4.2
Zhiyu Wang,Peixi Li,Li Yang,Shuangshuang Wang,Lei Zhao,Jiajun Liang,Yuan Liu,Chao Xu,Yanjun Zhang
Iron and copper ions has been confirmed to be an impurity generated during the production of coal-based ethylene glycol. Therefore, a highly sensitive fluorescent probe based on N-doped carbon dots (N-CDs) is constructed by two different mechanisms for the independent detection of Cu 2+ and Fe 3+ in ethylene glycol. In this method, Cu 2+ undergoes an oxidation-reduction reaction with o -phenylenediamine (OPD), leading to the formation of 2,3-diaminophenazine (oxOPD). oxOPD emits a fluorescence signal, and simultaneously, fluorescence resonance energy transfer (FRET) occurs between N-CDs and oxOPD, resulting in the quenching of the fluorescence intensity of N-CDs. Owing to the selective oxidation reaction and colorimetric response of OPD with Cu 2+ , a ratiometric fluorescent and colorimetric dual-signal probe for detecting Cu 2+ is successfully developed. Furthermore, Fe 3+ can effectively quench the fluorescence of N-CDs through the static quenching. Under optimized conditions, the probe demonstrates excellent selectivity and sensitivity to Cu 2+ and Fe 3+ , a wide linear response range and a low detection limit (LOD). The probe was applied to the detection of Cu 2+ and Fe 3+ in various types of industrial ethylene glycol (high ethylene glycol content, industrial-grade ethylene glycol and polyester-grade ethylene glycol) with satisfactory recovery rate. The probe provides a promising prospect for the routine detection of Cu 2+ and Fe 3+ in industrial ethylene glycol.
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CERAMICS INTERNATIONAL
·
2025
·Vol. 52
·期 1
·114-121
·
IF 5.6
Shixian Xie,Pengbo Fu,Lichen Wang,Huayang Gong,Fang Wang,Fenghua Chen,Zhigang Sun,Jiaguo Fan,Yan Zhang,Jian Zhang,Baogen Shen
M-type strontium ferrite (SrFe 12 O 19 ) is widely used in various fields due to its low cost and excellent stability. However, its relatively low saturation magnetization ( M s ) significantly restricts its broader applications. Enhancing M s through non-rare-earth doping via the solid-state reaction method is of significant practical importance. The primary challenge lies in simultaneously maintaining lattice stability and regulating Fe 3+ spin alignment through doping. In this study, a series of non-rare-earth Nb–Zn co-doped SrFe 12- x (Nb a Zn b ) x O 19 ( a : b = 1:1, a : b = 4:5, x = 0.1–0.5) were synthesized using the solid-state reaction method. XRD phase analysis indicated that a single M-type strontium ferrite phase was obtained at the stoichiometric doped ( a:b = 1:1). In contrast, for the non-stoichiometric doped ( a:b = 4:5), a trace amount of the secondary phase SrNb 0.5 Fe 0.5 O 3 was detected in Nb–Zn doped samples with x ≥ 0.2. M s of both stoichiometric and non-stoichiometric doped samples increased within the range of 0≤ x ≤ 0.3 but gradually decreased when x exceeded 0.3. Notably, for the composition with a : b = 4:5, M s reached a maximum value of 79.33 emu/g at x = 0.3, accompanied by a synchronous enhancement of 18.5 % in coercivity ( H c ). Raman spectroscopy analysis revealed the enhancement mechanism of M s : the synergistic occupation of Nb 5+ and Zn 2+ ions. Specifically, Zn 2+ preferentially occupies the 4f 1 tetrahedral sites, while Nb 5+ incorporates into the 4f 2 sites. This co-substitution effectively replaces the spin-down Fe 3+ ions, leading to a significant increase in M s . The presence of a trace amount of the secondary phase SrNb 0.5 Fe 0.5 O 3 in the non-stoichiometrically doped samples, effectively inhibited grain growth, thereby contributing to the enhancement of H c . This study successfully synthesized non-rare-earth-doped strontium ferrite materials via a solid-state reaction method, achieving a significant enhancement in M s . Furthermore, the underlying mechanism for the improvement in M s through Nb–Zn co-doping was elucidated for the first time. Our findings are of significance for the development of high-performance, cost-effective ferrite materials.
研究领域:
材料科学
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磁学与磁性材料
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固态化学
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APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Rui Yang,Xiangfeng Guo,Lihua Jia,Yu Zhang,Zhenlong Zhao,Fedor Lonshakov
A simple method was developed in the synthesis of fluorescent carbon dots (referred to as M-CDs), calcined treatment of mangosteen pulp in air, without the assistance of any chemical reagent. The M-CDs possess good-solubility, satisfactory chemical stability and can be applied as the fluorescent temperature probe. More strikingly, the fluorescence of M-CDs can be fleetly and selectively quenched by Fe 3+ ions. The phenomenon was used to develop a fluorescent method for facile detection of Fe 3+ with a linear range of 0–0.18 mM and a detection limit of 52 nM. Eventually, the M-CDs were applied for cell imaging, demonstrating their potential toward diverse applications.
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Analytical Methods
·
2023
·Vol. 15
·期 15
·1923-1931
·
IF 3.1
Zeyi Li,Yunrui Cao,Tingyu Feng,Tingting Wei,Changhu Xue,Zhaojie Li,Jie Xu
To better satisfy the application of rapid detection methods in the detection of As(V) in complex food substrates, we developed an “off–on” fluorescence assay to detect As(V) based on the competition between the electron transfer effect of nitrogen-doped carbon dots (N–CDs)/Fe3+ and the complexation reaction of As(V)/Fe3+, using N–CDs/Fe3+ as a fluorescence probe. Solid-phase extraction (SPE) was used to eliminate matrix interference during sample pretreatment. The detection limit was 7.6 ng g−1, with a linear range of 10–100 ng g−1. The method was further used to determine As(V) in different seafood products including snapper, shrimp, clams, and kelp. At the same time, the recovery of the method was validated by high-performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP/MS), indicating that the developed method had good recoveries from 86% to 117% and met the needs for accurate determination of As(V). This approach has shown excellent application potential in the field of As(V) detection in various seafood products.
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Journal of Food Measurement and Characterization
·
2023
·Vol. 17
·期 3
·2850-2857
·
IF 3.4
Yang Xiao-Shuai,Wang Lu-Liang,Zhao Jie,Ji Shi-Lei,Liu Quan-Wen,Peng Xin-Yan,Hu Zhen-Hua,Liu Yu-Shen,Wang Ping
Facile fabrication of copper nanoclusters (CuNCs) with excellent fluorescence is desirable, but remains challenging and scarce for sensing applications in food. In this work, albumin egg (AE) stabilized CuNCs were prepared by a self-assembly templated method. The obtained fluorescent AE-CuNCs exhibited a strong emission at 412 nm upon excitation at 325 nm. Based on the absorption competition quenching mechanism, the AE-CuNCs fluorescent probe for Fe 3+ was developed. The probe had good linearity (0.10–1000 µM) with R 2 (0.986), low limits of detection (30 nM) and good selectivity. Furthermore, the iron content in noodles, biscuits, light soy sauce and bean sprouts was successfully determined by the fluorescent probe. Graphical Abstract
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Da Ouyang,Ronghao Wu,Zhaojun Xu,Xiaomin Zhu,Yimin Cai,Ruihuan Chen,Changyin Zhu,Damià Barceló,Haibo Zhang
Advanced oxidation processes (AOPs) based on persulfate (PDS) activation by iron materials have attracted significant attention due to their high organic pollution removal efficiency and relatively low remediation costs. However, one of the iron-based materials’ shortcomings is the weak activation ability of Fe 3+ on PDS and the low sustainability of Fe 2+ in the oxidation environment. In this study, biochar-supported molybdenum dioxide (MoO 2 @BC) was employed as a co-catalyst to enhance the Fe 3+ based PDS activation for Bisphenol A (BPA) degradation. Results showed that >96 % of BPA was removed during 60 min, and the BPA degradation efficiencies only slightly decreased after four reuses of MoO 2 @BC. Electron paramagnetic resonance (EPR) analysis and quenching experiments indicated that reactive oxidation species (ROSs) contributing to the degradation of BPA were SO 4 − , OH and 1 O 2 . Besides, it was found that biochar supporting favours the adsorption of Fe 3+ on the MoO 2 surface and promotes the electron transfer from Mo(IV) to Fe 3+ based on the combination of X-ray photoelectron spectroscopy (XPS) analysis, electrochemical tests and density functional theory calculation (DFT). This work provides a new insight for enhancing the performance of organic contaminants degradation through AOPs based on persulfate activation by iron material.
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Journal of Analysis and Testing
·
2023
·
IF 4.7
Zhang Xianfen,Wang Wenxian,Guan Lijiao,Chen Huajie,Li Dai,Zhang Lipeng,Huang Saipeng
Trace ferric ion (Fe 3+ ) detection has attracted increasing attention as an essential and indispensable role in many physiological and pathological research. The green-emitting carbon quantum dots (Green-CQDs) were obtained through a green and facile one-step hydrothermal method for the specific recognition and trace detection of Fe 3+ in this paper. The optimal excitation and emission wavelengths of the CQDs were 395 nm and 490 nm, respectively. The stokes shift was up to 95 nm, which can effectively reduce the background fluorescence interference. In addition, it also exhibited good water solubility, stability, and high biocompatibility. The fluorescence intensity of Green-CQDs was linearly related to the concentration of Fe 3+ (range of 0–80 μmol/L), and the detection limit was as low as 59 nmol/L. These good properties were favorable and successful for Fe 3+ detection in tap water, human serum samples and living cells. In addition, a fluorescence visual test paper (FP@CQDs) was prepared utilizing filter paper as carrier, which can quickly identify Fe 3+ in real time, and is suitable for the visualization analysis of Fe 3+ in environment. As an efficient nanoprobe, the Green-CQDs held great promise and bright prospects in practical application in prevention and early clinical diagnosis of Fe 3+ -associated diseases.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2022
·
IF 3.898
Haike Li,Xindong Li,Guozai Ouyang,Lang Li,Zhaohuang Zhong,Meng Cai,Wenhao Li,Wanfu Huang
Organic solvent nanofiltration (OSN) membranes have a great application prospect in organic solvent separation, but the development of OSN membranes is mainly restricted by trade-off between permeability and rejection rate. In this work, a TA/Fe 3+ polymer was introduced into polyetherimide (PEI) ultrafiltration membranes crosslinked with hexamethylene diamine as the intermediate layer, and OSN membranes with high separation performance and solvent permeability were obtained through interfacial polymerization and solvent activation. The interlayer with high surface hydrophilicity and a fixed pore structure controlled the adsorption/diffusion of the amine monomer during interfacial polymerization, forming a smooth (average surface roughness < 5.5 nm), ultra-thin (separation layer thickness reduced from 150 to 16 nm) and dense surface structure polyamide (PA) layer. The PA- Fe 3 3 + -HDA/PEI membrane retained more than 94% of methyl blue (BS) in 0.1 g·L −1 BS ethanol solution at 0.6 MPa, and the ethanol permeation reached 28.56 L −1 ·m −2 ·h −1 . The average flux recovery ratio (FRR) of PA- Fe 3 3 + -HDA/PEI membrane was found to be 84%, which has better fouling resistance than PA-HDA/PEI membrane, and it was found to have better stability performance through different solvent immersion experiments and continuous operation in 0.1 g·L −1 BS ethanol solution. Compared with thin-film composite nanofiltration membranes, the PA- Fe 3 3 + -HDA/PEI membrane can be manufactured from an economical and environment-friendly method and overcomes the trade-off between permeability and rejection rate, showing great application potential in organic solvent separation systems.
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