CHEMICAL GEOLOGY
·
2025
·
IF 3.6
FengTing Wu,ChunYan Luo,YueHan Lu,XueYan Li,KuanYi Li,YingXun Du
The co-precipitation of dissolved organic matter (DOM) and phosphate with Fe(III) at the sediment-water interface plays a crucial role in the biogeochemical cycling of organic carbon (OC) and phosphate (P) in aquatic ecosystems. The fluxes of organic matter and phosphate may occur in a sequential manner. This study investigated how phosphate affected pre-equilibrated Fe(III)-humic acid (HA) co-precipitates and how HA influenced pre-equilibrated Fe(III)-phosphate co-precipitates under varying pH and Fe(III) concentrations. The results revealed that the addition of phosphate to the Fe-HA co-precipitation system generally promoted further precipitation of dissolved Fe(III) with phosphate, resulting in about 9.48–33.15 % of the phosphate being precipitated. This addition had minimal impact on the percentage of pre-immobilized HA but facilitated the release of high-aromaticity HA from the Fe-HA co-precipitate. Conversely, adding HA to the Fe P co-precipitation system increased the concentrations of soluble Fe(III) and phosphate, likely due to the strong complexation ability of HA with Fe(III). The percentage of HA remaining dissolved was lower at lower pH levels and higher initial Fe(III) concentrations. These findings highlight how the timing of phosphate or DOM inputs influences their sequestration. This has important implications for carbon and nutrient storage in aquatic sediments, where fluxes of organic carbon and phosphate may occur in a sequential manner.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Bio
·
2025
·
IF 10.2
Xiang Gao,Kewei Li,Yan Huang,Ziyan Long,Yongguo Xiang,Wendi Zheng,Hong Cheng,Huijie Cao,Wenjuan Wan,Shijie Zheng,Xianwen Wang,Ke Hu
Age-related cataracts (ARCs) are major causes of vision impairment globally, primarily resulting from oxidative stress–induced senescence and apoptosis in lens epithelial cells (LECs). In this study, a sodium selenite-induced oxidative stress cataract model in neonatal rats was used to mimic ARC pathology. We investigated the therapeutic potential of Fe-curcumin nanozymes in delaying ARC progression by targeting cellular senescence and oxidative injury. In vitro experiments revealed that Fe-curcumin nanozymes significantly reduced reactive oxygen species (ROS) levels in H 2 O 2 -treated LECs, alleviated cellular senescence, and decreased apoptosis. The levels of superoxide dismutase (SOD) and catalase (CAT) were also markedly increased. Notably, the nanozymes downregulated senescence-associated secretory phenotype (SASP) factors, including IL-6, IL-1β, CXCL1, and TGF-β, indicating suppression of the proinflammatory senescent microenvironment. In vivo , Fe-curcumin nanozyme treatment effectively delayed cataract development in rats. Mechanistically, the nanozymes inhibited both senescence and apoptosis by modulating the p53/p21/BAX signaling axis, primarily through reducing p53 expression and phosphorylation levels. These findings suggest that Fe-curcumin nanozymes represent a promising therapeutic strategy for ARCs by suppressing oxidative damage, cellular senescence, and inflammation through targeting p53-related pathways.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Shanshan Huang,Bolin Li,Gezi Li,Siyuan Zheng,Kanglin Tian,Weimin Xie,Simiao Wu,Jun Wang,Ying Yu,Xiaoman He
There is currently an urgent need to develop technologies for ciprofloxacin (CIP) removal in wastewater owing to its widespread usage in human and animal populations and subsequent transmission into surface water. Aluminum (Al 2 O 3 ) is an excellent carrier, and polydopamine (PDA) is a surface modifier with a high nitrogen content and strong adhesion, and may represent a potential tool for CIP removal in wastewater. However, minimal research has been conducted on using PDA to improve the interactions between carrier and active components and thus improve the ozone utilization efficiency as well as catalytic activity and stability in CIP removal schemes. To address this research gap, study successfully prepared Fe-Mg/PDA@Al 2 O 3 composite materials for the catalytic ozone removal of CIP from water. The influencing factors and degradation mechanisms of the catalytic ozone treatment of ciprofloxacin wastewater and possible antibiotic degradation pathways were proposed. The removal of CIP was mainly carried out through indirect oxidation dominated by hydroxyl radicals (•OH), in addition to catalyst adsorption and direct ozone oxidation, and the oxidative degradation of CIP conformed to a pseudo-first-order reaction kinetic model. Under ideal operating conditions, the CIP degradation efficiency of Fe-Mg/PDA@Al 2 O 3 /O 3 system reached 91.35% after 15 min. The mineralization efficiency of Fe-Mg/PDA@Al 2 O 3 /O 3 system was significantly higher than that of the single-ozone system. After four repeated uses of Fe-Mg/PDA@Al 2 O 3 , the CIP degradation efficiency remained stable, and the metal ion leaching concentration was within the limit, indicating that Fe-Mg/PDA@Al 2 O 3 demonstrated a high catalytic performance and stability.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yan Tao,Chongying Liao,Fangli He,Yixuan He,Sihui Yang,Liu-Pan Yang,Li-Li Wang
Creatine (CR) is an active compound closely associated with meat quality. However, current techniques for measuring CR in meat face challenges in achieving rapid and low-cost detection. In this study, nanozyme based on iron-doped carbon dots (Fe-LCDs) was synthesized by employing sodium lignosulfonate and iron as the precursors. Iron incorporation was crucial for significantly enhancing the peroxidase-like activity of Fe-LCDs. A cascade sensing platform was developed by integrating creatinase (CRH) and sarcosine oxidase (SOx) with Fe-LCDs. In this system, CR interacts with the catalytic framework to generate superoxide anions, which catalyzes the oxidation of 3,3′,5,5’-Tetramethylbenzidine (TMB) to produce a blue-colored product, enabling colorimetric detection of CR. Furthermore, a sensing platform compatible with smartphones was established, successfully facilitating rapid, sensitive, and visual detection of CR in meat. This research not only synthesized an effective CDs-based nanozyme but also devised a novel and promising nanoparticle-based sensing platform for CR detection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Dan Wang,Hanzhu Shi,Liangjun Ma,Xue Zhou,Rongrong Zhang,Yanhong Xu,Lu Li,Lingyu Zhang,Chungang Wang
The development of novel nanozymes with excellent enzyme simulation ability provides a new perspective for antibacterial and wound healing. However, the enzyme activity of traditional simplex nanozyme is not sufficient, meanwhile the nanozymic catalytic therapy alone cannot fulfill the purpose of effective antibacterial and wound healing. Hence, we develop novel multifunctional nanocomposites composed of FeCo alloys integrate with carbon spheres and carbon nanotubes (FeCo-C/CNT NCs) with hydrophobic property, enhanced oxidase-like (OXD-like) activity and photothermal property. Remarkably, i n vitro experiment shows the the antibacterial rates of 200 μg/mL FeCo-C/CNT NCs against Staphylococcus aureus (S. aureus) and Escherichia coli ( E. coli) are as high as 83.46 % and 90.98 %, respectively. The mechanism of synergistic antibacterial effect is not only due to the reactive oxygen species (ROS) generation from FeCo alloy part of FeCo-C/CNT NCs, but also because the local high temperature generated by the photothermal effects of FeCo-C/CNT NCs under near infrared (NIR) laser irradiation, as well as heat promoted ROS production. The FeCo-C/CNT NCs under NIR laser irradiation present best wound healing via hydrophobic protection, synergistic catalytic and photothermal therapy on S. aureus -infected mice. This work introduces a novel alloy nanozyme with excellent antibacterial property, providing new idea in the field of wound healing.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2025
·
IF 6.3
Mengqi Bu,Li Yi,Yingjie Wen,Minli Wang,Hao Yang,Chaohao Chen,Dengsong Zhang,Xu Chen,Zhiyi Lu
Electro-activating peroxydisulfate (PDS) based on the cathode represents a highly promising advanced oxidation process; however, its longevity is constrained by cathode leaching. In this work, we demonstrate that the γ-FeOOH/Fe Foam and α-Fe 2 O 3 /Fe Foam obtained by engineering a protective layer containing iron and oxygen on Fe Foam exhibit significantly extended service life of 53 h and 47 h, 2.94-fold and 2.61-fold longer than that of the original Fe Foam (18 h), while showing similar pseudo-first-order kinetics. Structural evolution analysis and density functional theory simulations reveal that surface oxygen plays a crucial role in reducing the leaching of Fe from the cathode by immobilizing Fe ions and converting them in-situ into stable Fe 3 O 4 . The electro-activation mechanism of PDS on the cathode, the degradation pathways of atrazine (ATZ), and the effects of operating conditions are systematically investigated and elucidated. This work underscores the pivotal role of surface oxygen in prolonging the longevity of Fe-based cathodes, thereby contributing to the development of protective layers.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Bio
·
2025
·
IF 10.2
Hongjin Xue,Yunqian Li,Xinyu Ma,Qi Zhang,Junkai Zhu,Xiaoli Ni,Jianfeng Qiu,Zhengjun Li,Zhen Mu
Psoriasis is a chronic skin condition with significant unmet medical needs, characterized by high levels of reactive oxygen species (ROS) and accompanying oxidative stress. In this study, we developed a novel single-atom iron nanozyme (Fe-N 3 ), designed to mimic natural antioxidant enzymes, for the effective treatment of psoriasis. By optimizing the local coordination environment of Fe atoms, Fe-N 3 demonstrated superior superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APx), and glutathione peroxidase (GPx)-like activities compared to Fe-N 4 . These properties enable efficient ROS scavenging and oxidative stress alleviation. Theoretical analyses revealed that Fe-N 3 possesses lower energy barriers for ROS decomposition, explaining its superior catalytic performance. Furthermore, in vitro and in vivo experiments have demonstrated that Fe-N 3 nanozyme exhibited remarkable therapeutic effects with extremely low cytotoxicity, effectively inhibiting pathological epidermal proliferation, downregulating key inflammatory factors, and reducing the expression levels of psoriasis-associated pathway proteins. This work highlights the promise of single-atom nanozymes in the curing of inflammatory skin diseases, advancing the transformative role of nanotechnology in biomedicine.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Fei Lin,Honglei Ren,Fengtao Sun,Xiaoxue Pan,Xuesheng Zhang
Organic synthetic phenolic antioxidants (SPAs) and inorganic Fe-based antioxidants are widely used in daily life to prevent or delay oxidation and prolong storage and use. However, the ubiquitous occurrence of SPAs and the unreasonable disposal of Fe-based antioxidants (typically throwing them away) cause environmental issues and waste Fe resources. In this study, 16 solid SPAs and one important SPA intermediate were selected as target pollutants and destroyed via the ball milling Fe-based antioxidants collected from food bags packaged under a vacuum. Typical influencing factors, such as the co-grinder type, content, and grinding velocity, significantly affected the destruction efficiencies of the substrate (4- tert -octylphenol, 4- t OP, a representative commonly used SPA). Under optimal conditions, 0.1 g of 17 SPAs achieved high removal rates (35 %–97 %), with the highest first-order reaction rate constant ( k ) for propyl gallate (PG) being 1.00 h −1 , and the lowest k value for 2,6-di- tert -butyl-4-methylphenol (BHT) being 0.09 h −1 . Experimental and characterization (X-ray diffraction, Fourier transform-infrared spectroscopy, and X-ray photoelectron spectroscopy) observations showed that the reduction of Fe 0 , the oxidation of •OH, the reduction and oxidation of Fe(II) and Fe(III), oxygen vacancies, and mechanical forces exerted during ball-milling contributed to SPA destruction. Among these, the first two were the main mechanisms; however, the mechanical forces could not be ignored. Ten intermediates generated by 4- t OP during Fe-based ball milling were identified based on mass spectrometric results. Three pathways involved were hydroxylation, dealkylation, and polymer formation, and hydroxylation products were more abundant than others. According to ECOSAR and T.E.S.T program analyses, the ecotoxicity of most of the obtained intermediates was reduced. These findings reveal that Fe-based ball-milling technology can treat solid SPA pollution and achieve double-win performance.
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2022
·
IF 13.4
Shuang Meng,Peng Zhou,Yiming Sun,Peng Zhang,Chenying Zhou,Zhaokun Xiong,Heng Zhang,Juan Liang,Bo Lai
Reduction of Fe(III) is the rate-limiting step of iron induced Fenton-like systems, such as the iron/peroxydisulfate system, reducing agents (RAs) were frequently employed as electron donors to directly reduce Fe(III) to further promote the formation of reactive oxygen species (ROS), mainly including hydroxyl radical ( • OH), sulfate radical (SO 4 •− ), and ferryl ion (Fe(IV)). However, the intrinsic distinctions among these ROS cause the substrate specific reactivity towards oxidation of diverse organic contaminants. In this study, various RAs (representative solid amorphous boron (A-Boron) and dissolved hydroxylamine (HA)) were added to enhance the Fe(III)/PDS system for investigating the substrate specific reactivity of ROS. It is demonstrated that RAs remarkably boost the Fe(III)/Fe(II) cycles to produce • OH, SO 4 •− , and Fe(IV) in the RAs/Fe(III)/PDS systems, based on the results of EPR analysis, quenching tests, and chemical probe analysis. Furthermore, the different yields of methyl phenyl sulfone (PMSO 2 ) indicate that the distribution of multiple oxidizing species changed with various factors (i.e., type and dosage of RAs added, solution pH, Fe(III) and PDS dosage). This work provides the possibility for the adjustment of oxidation selectivity of RAs/Fe(III)/PDS systems by regulating contribution of radicals and non-radical for oxidizing organic contaminants due to the substrate specific reactivity of • OH, SO 4 •− , and Fe(IV), moreover, the comparison of homogeneous and heterogeneous RAs provides assistance in the application of RAs for environmental remediation.
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Kuangfu Huang,Ruohao Dong,Chao Wang,Wen Li,Hongxia Sun,Baoyou Geng
Design and synthesis of highly efficient, stable, and low-cost catalysts have a crucial role in the study of electrolytic water. In this work, a novel Fe–Ni layered double hydroxide (LDH) material with homogeneous heterostructures is successfully synthesized by a two-step hydrothermal method. Compared with the ordinary Fe–Ni LDH arrays prepared by one step, this structure has a rougher surface, so it has a more extensive active area, thus providing more active sites. Due to the synergistic effect of different elements and more exposure of active sites, the catalytic effect of this material for water splitting is outstanding. The post-optimized FeNi@FeNi electrode exhibits extraordinary OER (oxygen evolution reaction) and HER (hydrogen evolution reaction) performance with OER overpotentials of 193, 231, and 306 mV and HER overpotentials of 127, 173, and 253 mV when the current density is 10, 20, and 50 mA·cm–2, respectively. The improved electrolytic water performance reveals that the design of homogeneous heterostructures is maybe an alternative route to exploit high-efficiency catalysts and promote the application of nonprecious metal catalytic materials.
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Lin-Hui Dong,Wei Wei,Cheng-Long Yu,Zhen-Hui Hou,Zhen Zeng,Tianyu Chen,Fang Huang
Vanadium isotope compositions (δ(51V)) in marine carbonates are a potential proxy to trace global redox states of ancient oceans. Although high-precision δ(51V) analyses are available for many geological materials, carbonate-hosted δ(51V) data have not been reported yet due to extremely high matrix elements and low V contents (generally below 10 μg g–1). In this study, we developed an Fe coprecipitation method combined with an Fe column to preconcentrate V from the major matrix elements and subsequent four-step chromatographic procedures to further purify V in carbonates. The δ(51V) values were measured using a sample–standard bracketing method by MC-ICP-MS. The robustness of this method was assessed by analyzing element-doped and matrix-spiked synthetic carbonate solutions containing an in-house δ(51V) standard, USTC-V. The mean δ(51V) value of the synthetic carbonate solutions (0.06 ± 0.08‰; 2SD, n = 33) is in good agreement with the recommended value of the USTC-V relative to the Oxford AA solution (0.07 ± 0.08‰; 2SD, n = 347). In addition, the consistency in the δ(51V) value of the igneous carbonatite standard, COQ-1, which was processed in parallel with the whole purification (−0.48 ± 0.04‰; 2SD, n = 3) and a four-step chromatographic procedure (−0.43 ± 0.08‰; 2SD, n = 3), further validates the robustness of our method. For the first time, we obtained δ(51V) values of four carbonate reference materials: JDo-1, −0.56 ± 0.09‰ (2SD, n = 27); JLs-1, −0.61 ± 0.14‰ (2SD, n = 33); GBW07217a, −0.79 ± 0.09‰ (2SD, n = 6); GBW07214a, −0.51 ± 0.13‰ (2SD, n = 48). The long-term external precision of carbonate-hosted δ(51V) analyses is better than ±0.14‰ (2SD). Our method can be applied to measure carbonate-hosted δ(51V) to trace the evolution in global marine redox states throughout the Earth’s history.
✓ 已验证
DOI
PubMed
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-11
·
IF 4.011
Li Junchao,Li Xuhua,Han Jindong,Meng Fansheng,Jiang Jinyuan,Li Jiao,Xu Chunlian,Li Yun
Mesoporous bimetallic Fe/Co was prepared as a Fenton-like catalyst to degrade the tetracycline hydrochlorides (TC). The nanocasting strategy with KIT-6 as a hard template was carried out to synthesize the mesoporous bimetallic catalyst. The mesoporous bimetallic Fe/Co catalyst was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), nitrogen adsorption-desorption isotherms, and Brunauer-Emmett-Teller (BET) method. The results showed that the catalyst has significant nanofeatures; the surface area, pore size, and particle size were 113.8 m 2 g −1 , 4 nm, and 10 nm, respectively. In addition, the effects of the operating parameters, such as the iron-to-cobalt ratio, pH, H 2 O 2 , and initial TC concentrations on its catalytic performance were investigated. The best operating parameters were as follows: iron-to-cobalt ratio = 2:1 to 1:1, pH = 5–9, H 2 O 2 : 30 mmol, initial TC less than 30 mg/L. Furthermore, the mesoporous bimetallic Fe/Co showed a good performance for degrading TC, achieving a removal rate of 86% of TC after 3 h under the reaction conditions of H 2 O 2 = 30 mmol, mesoporous bimetallic Fe/Co = 0.6 g/L, TC = 30 mg/L, pH = 7.0, and temperature = 25.5 °C. The mesoporous bimetallic Fe/Co catalyst shows good stability and reusability. This work demonstrated that mesoporous bimetallic Fe/Co has excellent catalytic efficiency, smaller amounts of leached ions, and wider pH range, which enhance its potential applications.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）