LAB ON A CHIP
·
2025
·
IF 5.4
Jie Chen,Penghui Li,Ran An,Aishan Cai,Kaiqi Wang,Zheyu Zhang,Tao Wang,Yuandu Hu
Although shape-controllable alginate-based microgels via droplet microfluidics have been widely investigated, studies have mostly focused on tuning the designs of microfluidic devices and parameters of the crosslinking media, and very little attention has been paid to studying the effect of droplets' compositions on the morphologies of the resulting microgels. In the present study, droplets of aqueous solutions of sodium alginate (SA) with different additives (i.e., 10 wt% dextran, PEG, or glycerol) have been produced from microfluidics and collected in solutions with different concentrations of glycerol (0–70 wt%) and FeCl3 (2–10 wt%). The effect of droplet compositions on the morphologies of resulting Fe-alginate microgels has been systematically investigated. The results showed that the morphologies of the microgels were remarkably influenced by the interactions between the droplets and the collecting solutions, leading to the formation of microgels with different shapes. Additionally, microgels prepared under specific conditions exhibited certain deformation patterns. For example, dimpled microgels with large cavities exhibited an increase in cavity size in collecting solutions with higher concentrations of glycerol and FeCl3 (the value of d/D rose from 0.3 to 0.5, D and d represent the outer contour dimension and the cavity diameter of the microgel). Similarly, red blood cell-like microgels showed an increase in concavity depth as the concentrations of glycerol and FeCl3 increased (the value of D/L rose from 1.7 to 3.7, D represents the horizontal length of the microgel, and L indicates the vertical depth of the concave). The dimple-like microgels were uniquely advantageous in terms of rapid and efficient payload release (up to 98% release in 5 hours, 16.68 μg of total release), significantly superior to the spherical microgels (82% release in 5 h, 12.54 μg of total release). These findings establish a framework for morphological engineering of microgels, offering promising opportunities for applications in payload delivery systems requiring rapid and controlled release profiles.
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DOI
PubMed
高影响因子
TALANTA
·
2025
·
IF 6.1
Luyang Zhao,Yang Song,Guoyang Xie,Hengyi Xu
A colorimetric assay based on the Fe/Al bimetallic organic framework NH 2 -MIL-53(Fe, Al) was developed for the sensitive detection of Escherichia coli O157:H7 ( E. coli O157:H7), a critical pathogen threatening food safety. The framework’s high specific surface area facilitated efficient antibody immobilization, whereas the incorporation of Al 3+ enhanced electron transfer between Fe 2+ /Fe 3+ , thereby significantly boosting peroxidase activity. The optimized NH 2 -MIL-53(Fe, Al) exhibited 1.4-fold and 4.9-fold higher relative absorbance than NH 2 -MIL-53(Fe) and NH 2 -MIL-53(Al), respectively. And it demonstrated 40-fold and 2-fold greater affinity for TMB and H 2 O 2 , respectively, compared to the natural enzyme. By integrating a dual-recognition system based on antibody and aptamer, the method enabled rapid detection with a limit of detection of 10 1 CFU/mL in colorimetric mode. Its successful application in complex matrices, including lettuce, juice, pool water, and chocolate milk, had yielded satisfactory recovery and precision, confirming its promising potential for food safety monitoring.
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiaolei Shi,Weibin Ma,Wei Chen,Xuan Tao,Chunxiao Gong,Shuai Gao,Lujiang Xu,Zhen Fang
Phenol is a typical toxic and persistent pollutant in wastewater, requiring efficient and recyclable adsorbents for its removal. In this study, Fe–N co-doped biochar was synthesized through four preparation routes combining KOH activation and FeCl 3 -NH 3 modification, and its phenol adsorption behavior and formation mechanism were systematically investigated. The biochar exhibited specific surface areas of 400–900 m 2 /g and N contents of 1.85–3.92 at.%, enabling the formation of Fe 2 O 3 , Fe 3 O 4 , and Fe-N x species. Among the samples, the biochar prepared at 800 °C via activation and soaking–drying achieved the highest phenol adsorption capacity (263.09 mg/g). Adsorption followed the Freundlich isotherm and pseudo-second-order kinetic model, indicating multilayer chemical adsorption. Cycling experiments revealed that Fe 2 O 3 and Fe 3 O 4 were easily detached, whereas Fe-N x remained stable, maintaining 76 % adsorption capacity after five cycles. DFT calculations further confirmed the strong anchoring of Fe ions by N-doped micropores and the thermodynamic stability of Fe-N x structures. This work demonstrates a simple and effective approach for preparing stable Fe-N biochar and provides mechanistic insight into its enhanced phenol adsorption.
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高影响因子
Journal of Materiomics
·
2025
·
IF 9.6
Fengting Mao,Zhongwei Zhang,Sijing Zhu,Chengyan Liu,Jie Gao,Jun-Liang Chen,Xiaoyang Wang,Tong Xing,Lei Miao
GeTe is a promising medium-temperature thermoelectric material. However, an excessively high concentration of Ge holes leads to a high hole carrier concentration, which can degrade its performance. Though carrier concentration reduction via doping has been pursued as a principal optimization approach, the strong interdependence between key transport parameters and carrier concentration severely limited the overall enhancement efficacy. In this work, a simple composite method is employed to achieve synergistic optimization of carrier concentration and carrier mobility, thereby increasing the power factor and reducing the lattice thermal conductivity. Sb and Fe form a core-shell structure, which effectively scatters phonons and reduces the lattice thermal conductivity, achieving a minimum value of 0.59 W⸱m –1 ⸱K –1 at 723 K. Additionally, Fe doping enhances the effective mass, improves the Seebeck coefficient, and significantly boosts the power factor, which reaches a peak value of 43.0 μW⸱cm –1 ⸱K –2 at 623 K. The results demonstrate that the sample Ge 0.885 Sb 0.1 Fe 0.015 Te achieves a maximum zT of approximately 2.13 at 723 K and an average zT ( zT avg ) of 1.43 within the temperature range of 323 K to 773 K. This work provides an effective path to enhance the performance of GeTe-based thermoelectric materials.
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高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2025
·
IF 4.9
Li Huanxuan,Wei Xueheng,Gao Xing,Liu Chen,Li Ning,Xu Chen,Huang Jingang,Liu Xiuyan,Xu Shaodan
The degradation of antibiotics remains a major and persistent challenge in wastewater treatment. This study reports the synthesis of three distinct catalysts from a zeolitic imidazolate framework-67 (ZIF-67) precursor through pyrolysis at 800 °C, namely ZIF-67(Fe)-800, ZIF-67(Co)-800, and ZIF-67(FeCo)-800. Comprehensive characterization (e.g., X-ray diffractometer and transmission electron microscopy analyses) confirmed their graphitic carbon matrix, specific metallic phases, and unique polyhedral morphologies. These catalysts were employed to activate peroxymonosulfate (PMS) for ciprofloxacin (CIP) degradation. Strikingly divergent catalytic performances were observed, with CIP degradation rate constants of 0.0027, 0.0731, and 0.0504 min –1 for ZIF-67(Fe)-800, ZIF-67(Co)-800, and ZIF-67(FeCo)-800, respectively. Furthermore, the bimetallic ZIF-67(FeCo)-800 demonstrated consistently inferior performance in activating both peroxydisulfate and sodium percarbonate compared to PMS, resulting in significantly lower CIP degradation rates of 52% and 87%, respectively. Mechanistic investigations using electron paramagnetic resonance and quenching tests revealed that hydroxyl radical ( · OH), sulfate radical (SO 4 •− ), and singlet oxygen ( 1 O 2 ) were the dominant reactive species in both the ZIF-67(Fe)-800/PMS and ZIF-67(Co)-800/PMS systems. In contrast, the ZIF-67(FeCo)-800/PMS system operated via a distinct pathway, primarily generating SO 4 •− , accompanied by · OH, 1 O 2 , and superoxide radicals (O 2 •− ). Notably, H 2 PO 4 − and HCO 3 − exhibited strong inhibitory effects on CIP degradation, while SO 4 2− and CH 3 COO − led to modest rate enhancements. Overall, this work provides a rational framework for designing MOF-derived catalysts and highlights their potential for application in advanced oxidation processes aimed at removing pharmaceutical pollutants.
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高影响因子
POWDER TECHNOLOGY
·
2025
·
IF 4.6
Yanting Zhou,Junchao Zhao,Tengfei Wang,Zhilei Yu,Yangyang Fu,Yong Jiang,Xudong Cheng,Heping Zhang
Despite the exceptional fire-suppressant capabilities of ultrafine dry powder fire extinguishing agents, additional work is essential to improve their overall fire-extinguishing performance. In this investigation, we explored the utility of Fe 3+ loaded ZSM-5 zeolite in enhancing the firefighting capabilities of ultrafine dry powder fire extinguishing agents. The loading of transition metal ions Fe 3+ onto the ZSM-5 zeolite was achieved through the ion solution exchange method. Interestingly, the loading of Fe element on Fe/ZSM-5 zeolite displayed a pattern of initial increase followed by decrease as the ion exchange time lengthened. Furthermore, the loading of Fe element on Fe/ZSM-5 zeolite was found to be influenced positively by the initial molar concentration of Fe 3+ and pH levels. Impressively, under specific working conditions, the prepared Fe/ZSM-5 zeolite demonstrated a substantial Fe element loading of 5.82 %. Incorporation of ZSM-5 zeolite resulted in a 10.01 % enhancement in the fire-extinguishing efficiency of the ultrafine dry powder compared to undoped samples. Moreover, the incorporation of Fe/ZSM-5 zeolite has resulted in an enhancement of fire extinguishing efficiency by 20.45 % (S3), 24.20 % (S4), and 29.04 % (S5) in comparison to S1. These findings contribute to the understanding that the incorporation of Fe/ZSM-5 zeolite significantly enhances the fire extinguishing performance of ultrafine dry powder fire extinguishing agents, with extinguishing efficiency improving with increased Fe element loading.
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高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 3.8
Li Zhang,Yu Yan,Diannan Huang,Liansong Gao,Rongxin Zhang
Anaerobic fermentation technology presents significant advantages in waste activated sludge treatment, encompassing sludge reduction, detoxification, and resource recovery, primarily by generating high-value volatile fatty acids (VFAs). This study systematically investigated the enhancement effects of Fe²⁺/sodium percarbonate (SPC) pretreatment on sludge disintegration and organic matter hydrolysis. The optimal pretreatment conditions (initial pH=3, SPC dosage=0.3 g/g TSS, Fe²⁺ dosage=0.3 g/g TSS) resulted in a maximum VFAs production of 1598 mg COD/L, representing a 7.26-fold increase compared to untreated sludge. Under these conditions, acetic acid accounted for 52.9 % of the total VFAs. The mechanistic analysis demonstrated that Fe²⁺/SPC pretreatment selectively enriched hydrolytic-acidogenic microbial communities while inhibiting VFAs-consuming populations, thereby directing metabolic flux toward acid accumulation. These findings establish an innovative technical approach and provide a mechanistic framework for advanced resource recovery from waste activated sludge.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Quan Huo,Gongquan Liu,Haihui Sun,Yanfei Fu,Yao Ning,Boyu Zhang,Xubiao Zhang,Jing Gao,Jiarun Miao,Xiaolin Zhang,Suyan Liu
CeO 2 /MIL-101(Fe) catalysts for a photocatalysis-extraction oxidation desulfurization (PEODS) system were designed by introducing different amounts of CeO 2 into MIL-101(Fe). And, the materials were further analyzed via some characterization technologies. Moreover, an optimization system, composed of CeO 2 /MIL-101(Fe), extractant acetonitrile and oxidant H 2 O 2 , was selected to remove dibenzothiophene (DBT) from model oil under visible-light irradiation. Evaluation results illustrated that 90% of DBT in oil phase was able to be transformed within 2 h as the adding amount of CeO 2 , the volume ratio of model oil to acetonitrile and the molar ratio of H 2 O 2 to DBT was 60 mg, 2:1 and 3:1, respectively. Radical scavenger experiments verified that · OH and · O 2 – were main reactive species in the process. The high photocatalytic activity was originated from a synergic effect produced between active sites of CeO 2 and active surface of MIL-101(Fe) and formed heterostructure in the catalyst, which broadened optical response ranges and facilitated photoinduced charge separations and transfers. Additionally, a convinced PEODS mechanism was proposed and rationalized.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Kaiyu Qi,Zeming Yuan,Yuan Hou,Ruichao Zhao,Bangwen Zhang
MoS 2 nanosheets have been widely explored as LIB anode materials due to higher theoretical capacity and weak interlayer interactions, but limited by their low conductivity and ease of stacking. Herein, we reported a novel Fe doped MoS 2 /reduced graphene oxide (Fe-MoS 2 /rGO) composite as LIB anode material and its one-step synthesis method. The results show that the synthesized Fe-MoS 2 /rGO composite has unique porous heterostructure , where networked Fe-MoS 2 nanosheets of several nm thickness grow upon crumpled rGO sheets with high specific area. Due to the Fe doping as well as the mild synthesis conditions, the resulting Fe-MoS 2 upon rGO sheets has wide interlayer spacing, abundant lattice defects and lower inner resistance. As a result, the Fe-MoS 2 /rGO electrode exhibits significant improvement in electrochemical performance relative to the non-doped MoS 2 /rGO electrode. The reversible capacities of Fe-MoS 2 /rGO electrode reach 1255 mAh/g (2nd circle) and 946 mAh g −1 (100th circle) with a retention of 75.4%. By comparison, the reversible capacities of MoS 2 /rGO electrode are only 654.1 mAh g −1 (2nd circle) and 429 mAh g −1 (100th circle) with a low retention of 64.1%.
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高影响因子
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Shuhao Li,Feng Wang,Zongli Xie,Derrick Ng,Boxiong Shen
Zeolitic imidazolate framework-8 (ZIF-8) based catalysts are considered as promising candidates for the selective catalytic reduction of NO by CO (CO-SCR) reaction due to their large specific surface area. However, the structure of ZIF-8 will be damaged during the synthesis procedure of the catalyst, leading to a decrease in their physical properties, which in turn affects the catalytic performance of the catalyst. Herein, a CeO 2 -ZIF-8 core-shell structure was synthesized and doped with Fe, resulting in the formation of Fe@CeO 2 -ZIF-8, for CO-SCR reaction. Characterization results show that the Fe@CeO 2 -ZIF-8 core-shell catalyst has better morphology, thermal stability, and higher specific surface area than the FeCe co-impregnated ZIF-8 catalyst (FeCe@ZIF-8 (IM)). Moreover, the reducibility of the reactive Fe species in the Fe@CeO 2 -ZIF-8 core-shell catalyst is also enhanced. As a result, the Fe@CeO 2 -ZIF-8 core-shell catalyst exhibited higher low-temperature CO-SCR catalytic activity with its NO conversion reaching 99% at 250 °C versus the FeCe@ZIF-8 (IM) catalyst (89% at 250 °C). The experimental results were further verified by density functional theory (DFT) calculations including Electron Localization Function (ELF), Valence Charge Density Difference (VCDD), Projected Density of States (PDOS) and Bader charge analyses. The calculation results revealed that the core-shell configured Fe@CeO 2 -ZIF-8 catalyst has a stronger active metal-support charge transfer and better capacity for the adsorption of the reactants. The reaction mechanism over Fe@CeO 2 -ZIF-8 core-shell catalyst was investigated via in situ DRIFTS experiments, and results showed that the nitro compounds and formate species are critical intermediates in this reaction at a higher temperature range (300–350 °C). This work provides a new strategy for the synthesis of ZIF-8 based catalysts with better properties for CO-SCR reaction.
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高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2019
·Vol. 94
·期 5
·1576-1584
·
IF 2.659
Weijie Wen,Zhencheng Lou,Yanjin Chen,Dingsheng Chen,Shuanghong Tian,Ya Xiong
BACKGROUND Iron (Fe) 3+ has much a smaller ion radius than cerium (Ce) 4+ but praseodymium (Pr) ions have a similar radius to Ce ions with the same valence. Hence, it is interesting to tune the structural properties, including lattice deformation, band gap and oxygen vacancy (O v ), of CeO 2 by Pr and Fe codoping for enhanced visible-light catalytic activity. RESULTS A series of Ce 1-x-y Pr x Fe y O 2-σ ( x = 0∼0.012, y = 0.003∼0.031) nanoparticles were prepared by a simple one-step sol-gel method. The structural properties of CeO 2 , including crystal deformation (cell lattice from 5.4069 to 5.4195), band gap (from 2.20 to 2.93), oxygen vacancies (O v from 0.15% to 9.03%), and peroxide species (O 2 2− from 0.37% to 1.09%) can be finely tuned by Pr and Fe codoping. Among ten samples, Ce 0.982 Pr 0.003 Fe 0.015 O 2-σ with proper structural properties showed the highest photocatalytic activity towards the degradation of acid orange 7. The first reaction rate constant reaches 0.0687 min −1 , 9.3 and 7.7 times that of Ce 0.994 Pr 0.006 O 2-σ and Ce 0.985 Fe 0.015 O 2-σ , respectively. The mechanism was found to involve ·OH, ·O 2 − and photogenerated holes. CONCLUSION The structural properties of CeO 2 can be finely and easily tuned by Pr and Fe codoping. Thus, the photocatalytic activity of CeO 2 under visible light irradiation was boosted. © 2019 Society of Chemical Industry
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高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Lile Dong,Peng Zhang,Pengpeng Lei,Shuyan Song,Xia Xu,Kaimin Du,Jing Feng,Hongjie Zhang
Contrast agents for multimodal imaging are in high demand for cancer diagnosis. To date, integration of T1/T2-weighted magnetic resonance imaging (MRI) and X-ray computed tomography (CT) imaging capabilities in one system to obtain an accurate diagnosis still remains challenging. In this work, biocompatible PEGylated GdF3:Fe nanoparticles (PEG-GdF3:Fe NPs) were reasonable designed and synthesized as multifunctional contrast agents for efficient T1/T2-weighted MRI and X-ray CT multimodal imaging. Owing to the enhanced permeability and retention effect in vivo, strong T1 contrast, evident T2 contrast, and X-ray CT signals in a tumor lesion can be observed after intravenous injection of PEG-GdF3:Fe NPs. Therefore, PEG-GdF3:Fe NPs could be used as potential multimodal contrast agents for cancer diagnosis.
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高影响因子
危险品化学品经营许可证（带存储）