ACS Nano
·
2024
·
IF 15.8
Quan Zou,Xi Chen,Bingjie Li,Ruijie Zhang,Jinbin Pan,Xuejun Zhang,Xuening Zhang,Shao-Kai Sun
Contrast-enhanced magnetic resonance imaging (CE-MRI) of acute kidney injury (AKI) is severely hindered by the poor targeting capacity and potential toxicity of current contrast agents. Herein, we propose one-step fabrication of a bovine serum albumin@polydopamine@Fe (BSA@PDA@Fe, BPFe) nanoprobe with self-purification capacity for targeted CE-MRI of AKI. BSA endows the BPFe nanoprobe with renal tubule-targeting ability, and PDA is capable of completely inhibiting the intrinsic metal-induced reactive oxygen species (ROS), which are always involved in Fe/Mn-based agents. The as-prepared nanoprobe owns a tiny size of 2.7 nm, excellent solubility, good T1 MRI ability, superior biocompatibility, and powerful antioxidant capacity. In vivo CE-MRI shows that the BPFe nanoprobe can accumulate in the renal cortex due to the reabsorption effect toward the serum albumin. In the AKI model, impaired renal reabsorption function can be effortlessly detected via the diminishment of renal cortical signal enhancement. More importantly, the administration of the BPFe nanoprobe would not aggravate renal damage of AKI due to the outstanding self-purification capacity. Besides, the BPFe nanoprobe is employed for CE-MR angiography to visualize fine vessel structures. This work provides an MRI contrast agent with good biosafety and targeting ability for CE-MRI of kidney diseases.
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高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 2
·1-15
·
IF 2.4
Li Ziyuan,Luo Mingsheng,Yang Zhi,Cui Xiaoteng,Yang Wenshuai,Xia Lingman,Shao Changke,Rahman Roshni
To effectively mitigate the global warming issue, it is crucial to develop advanced technologies that can significantly reduce carbon dioxide emissions. CO 2 hydrogenation for methanol synthesis is increasingly recognized as a promising chemical approach for the green-house gas utilization. In this study, we present a highly active, selective and stable Mo modified ZnCu-MOF and ZnCuAl-LDH composite catalysts, which achieves 18% CO 2 conversion and 70% methanol selectivity at 230 °C, 3.0 MPa at a space velocity of 3600 mL·g cat −1 ·h −1 . Furthermore, after 140 h of operation, the catalyst demonstrates superior durability. In-situ DRIFT results reveal that this CO 2 hydrogenation reaction over the ZnCu-MOF and ZnCuAl-LDH composite catalysts proceeds through key intermediate formate species, ultimately leading to the methanol formation. In contrast, the Mo-modified catalysts facilitate the CO insertion reaction (CO 2 → CO*, CO* + *CH x → CH 3 OH), thereby enhancing the methanol yield. Graphical
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MOLECULES
·
2024
·Vol. 29
·期 2
·307
·
IF 4.2
Zixuan Li,Qinghong Shi,Xiaoyan Dong,Yan Sun
Co-immobilization of laccase and mediator 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) for wastewater treatment could simultaneously achieve the reusability of laccase and avoid secondary pollution caused by the toxic ABTS. Herein, Fe-induced mineralization was proposed to co-immobilize laccase and ABTS into a metal–organic framework (ZIF-8) within 30 min. Immobilized laccase (Lac@ZIF-8-Fe) prepared at a 1:1 mass ratio of Fe2+to Zn2+exhibited enhanced catalytic efficiency (2.6 times), thermal stability, acid tolerance, and reusability compared to free laccase. ABTS was then co-immobilized to form Lac+ABTS@ZIF-8-Fe (ABTS = 261.7 mg/g). Lac@ZIF-8-Fe exhibited significantly enhanced bisphenol A (BPA) removal performance over free laccase due to the local substrate enrichment effect and improved enzyme stability. Moreover, the Lac+ABTS@ZIF-8-Fe exhibited higher BPA removal efficiency than the free laccase+ABTS system, implying the presence of a proximity effect in Lac+ABTS@ZIF-8-Fe. In the successive malachite green (MG) removal, the MG degradation efficiency by Lac@ZIF-8-Fe was maintained at 96.6% at the fifth reuse with only an extra addition of 0.09 mM ABTS in each cycle. As for Lac+ABTS@ZIF-8-Fe, 58.5% of MG was degraded at the fifth cycle without an extra addition of ABTS. Taken together, this research has provided a novel strategy for the design of a co-immobilized laccase and ABTS system for the degradation of organic pollutants.Keywords:laccase;mediator;co-immobilization;MOFs;organic pollutants;biodegradation
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yu Deng,Jingfan Chen,Ailun She,Fuquan Ni,Wenqing Chen,Tianqi Ao,Ying Zhang
The novel Fe-loaded porous hydrothermal biochars (FeKHCs) were successfully prepared by two-step synthesis of hydrothermal pretreatment and pyrolysis at different temperatures and used to remove tetracycline (TC) from wastewater. The biochar synthesized at 900 °C (FeKHC900) showed the highest specific surface area (SSA) (1487.55 m 2 /g) and porosity volume (V total ) (0.9951 cm 3 /g), which was significantly affected by hydrothermal pretreatment and K 2 C 2 O 4 activation. K 2 C 2 O 4 favored the micropores formation, which was beneficial to TC adsorption. Thus, FeKHC900 had the largest sorption amount of 606.52 mg/g for TC and outstanding performance for the other three antibiotics. Moreover, Fixed-bed column adsorption experiments proved that FeKHC900 has good dynamic adsorption performance (425.93 mg/g). The slightly reduced sorption amounts in different initial pH, coexisting ions, and humic acid (HA) indicated that FeKHC900 has a high resistance to interference and selective adsorption ability. Batch experiments revealed that TC adsorption was dominated by chemisorption, and the main mechanism referred to π-π interactions, pore-filling, H-bonding, and complexation. This work shares a simple and effective strategy for fabricating magnetic porous hydrothermal biochar as an efficient adsorbent to treat antibiotics.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhiguo Bian,Xiaotong Ma,Xiao Lu,Hao Yu,Long Chang,Zongying Han,Chongzheng Sun,Wan Zhang
The doping strategy with dark metallic oxide has proven effective in improving optical absorptions and heat storage performances of calcium-based materials for the direct solar-driven thermochemical energy storage system, but the microscopic mechanisms of accelerated decomposition of CaCO 3 during heat storage process are still unclear. Carbide slag as an industrial waste with low cost and high CaO content is considered as a potential calcium-based precursor for large-scale thermochemical energy storage. Herein, the novel Fe-doped and Mn-doped calcium-based materials were synthesized from carbide slag and their optical absorption properties and heat storage performances were determined in the experiment. The optimum decomposition temperatures of CaCO 3 during heat storage process decreased 10.5 °C and 18.6 °C due to Fe doping and Mn doping, respectively. The acceleration mechanisms by Fe doping and Mn doping for enhancing the CO 2 separation of CaCO 3 in the calcination stage of the heat storage process were investigated by density functional theory (DFT) calculations. The structural parameters, partial density of states, electron differential densities and energy barriers during CO 3 2– dissociation in heat storage process on the doped CaCO 3 and undoped CaCO 3 surfaces were compared to clarify the effects of Fe doping and Mn doping on the CaCO 3 decomposition. The energy barriers of Fe-doped material and Mn-doped material are 1.68 eV and 1.42 eV, respectively, which are 29.4% and 40.3% lower than that of undoped material. This work helps to understand the microscopic mechanisms of accelerated CaCO 3 decomposition by Fe and Mn during heat storage process.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Qianshun Chen,Qiuyan He,Yiting Wang,Chen Huang,Yuyu Lin,Jieyang Wang,Wei Shen,Bin Qiu,Xunyu Xu
Carcinoembryonic antigen (CEA) is the most widely adopted biomarker for the early determination of various cancers, thus it is very important to design a simple and highly effective sensing method to detect CEA. Herein, by synthesizing Fe-MOF nanohybrid loaded with platinum nanoparticles (Pt NPs/Fe-MOF) nanozyme and selecting CEA aptamer (Apt) as the specific recognition element, a simple nanozyme-based voltammetric sensor was designed to detect CEA based on Apt-controlled the catalytic activity of Pt NPs/Fe-MOF nanozyme. The as-synthesized Pt NPs/Fe-MOF nanozyme could catalyze effectively 1,2-diaminobenzene oxidation to produce electroactive 2,3-diaminophenazinc (DAP) which can exhibit a strong reduction current. Nonetheless, when Pt NPs/Fe-MOF is covered fully by Apt of CEA, the peroxidase activity of the as-synthesized Pt NPs/Fe-MOF nanozyme is remarkably restricted and the peak current of DAP would disappear nearly. Interestingly, this catalytic activity could be recovered effectively in the presence of CEA owing to the specific identification of Apt toward CEA. Through optimizing several experimental factors, the as-designed nanozyme voltammetric sensor offers superior detective performance for CEA. In addition, the as-designed sensor possesses superior specificity and selectivity, reproducibility and stability as well as practical applications, showing great potentials for achieving simple, sensitive and highly effective determination of CEA.
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CARBON
·
2024
·
IF 10.5
Yinghua Wang,Lingmin Wu,Konggang Qu,Xiujun Wang,Baitao Li
The oxygen reduction reaction (ORR) is a crucial step in the energy transformation devices, which requires the fabrication of a cost-effective and energy-efficient Fe single-atom catalyst (SAC) to substitute platinum. However, achieving a controllable synthesis of Fe SAC is a formidable challenge. In this study, a Fe SAC with a novel 3D-on-2D architecture was fabricated by coating 3D metal-organic frameworks (MOFs) over the surface of 2D reduced graphene oxide (rGO). In-situ combining MOF and rGO in a composite structure by adjusting their weight proportion is a key to preparing an active 3D-on-2D structured catalyst with FeN 4 active sites. Thanks to the favorable conductivity of the 2D rGO-derived carbon structure and the 3D MOF structure exposing an enhanced density of FeN 4 sites, FeNC@rGO-2 demonstrates exceptional ORR activity. It performs more effectively than commercial Pt/C, exhibiting excellent half-wave potentials of 0.887, 0.705, and 0.741 V in alkaline, neutral, and acidic solutions respectively. Impressively, FeNC@rGO-2 exhibits excellent stability and methanol tolerance. When FeNC@rGO-2 is assembled as cathode catalyst in Zinc-air batteries (ZAB) and microbial fuel cells (MFC), FeNC@rGO-2-ZAB reveals outstanding power density (393 mW cm −2 ) and good charge/discharge cycling stability. Amazingly, FeNC@rGO-2-MFC also shows superior power density (2810 ± 19 mW m −2 ) and efficiency of electron recovery. This study reveals that FeNC@rGO-2 has extremely high application value in energy conversion devices oriented for alkaline and neutral electrolytes.
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Nano Research
·
2015
·Vol. 8
·期 12
·3815-3822
·
IF 7.01
Wang Lingxiao,Geng Jing,Wang Wenhai,Yuan Chao,Kuai Long,Geng Baoyou
The sluggish oxygen evolution reaction (OER) is an important half-reaction of the electrochemical water-splitting reaction. Amorphous Fe/Ni composite oxides have high activity. In this work, we modified the aerosol spray-assisted approach and obtained amorphous Fe-Ni-O
x
solid-solution nanoparticles (Fe-Ni-O
x
-NPs) approximately 20 nm in size by choosing iron/nickel acetylacetonates as raw materials instead of inorganic salts. The small-sized Fe-Ni-O
x
-NPs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis, energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS). Furthermore, an investigation of electrochemical OER performance suggests that the small-sized Fe-Ni-O
x
-NPs have higher activity than the large-sized Fe-Ni-O
x
-MPs. A small overpotential of 0.315 V was demanded to obtain a working current density of 50 mA/cm 2 , and the Tafel slope was as low as 38 mV/dec.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Xuefei Chen,Xiedan Ren,Yi Wang,Jie Meng,Qing Huang,Jing Shen
Persistent infections caused by bacterial contamination and excess exudate often delay wound healing. To address this challenge, we have developed a multifunctional antibacterial Janus nanofibrous membrane with unidirectional fluid transport, pH-triggered drug release, and photothermal effect as a potential candidate for the infected wounds using electrospinning technology. This Janus membrane comprises a dual-layer structure: a hydrophilic poly(ε-caprolactone)/tannic acid-ferric ion (PCL/TA-Fe3+) nanofiber layer that provides pH-responsive drug release and photothermal antibacterial activity, and a hydrophobic PCL nanofiber layer for effective unidirectional fluid transport. The dual-gradient Janus structure, designed with hierarchical pore sizes and hydrophilic performance, facilitates rapid water transport. Meanwhile, due to the introduction of TA-Fe3+ complexes in situ, the Janus membrane demonstrates the capacity for controlled release of TA based on the pH level along with excellent photothermal properties. The synergistic action of TA-controlled release and photothermal effect endows the Janus membrane with nearly 100% bacterial eradication against Staphylococcus aureus and Escherichia coli as well as the eradication ability of the biofilm. Furthermore, the Janus membrane exhibits acceptable water absorption, moisture permeability, mechanical strength, and biocompatibility, indicating its potential as an optimal candidate for treating infected wounds.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Guohui Wang,Qixin Zhang,Lailai Qin,Kaixuan Tan,Chunguang Li,Lianshun Li,Tinggui Yang,Xiaojuan Liu
A novel metal-organic framework (MOF) material, MIL-100(Fe)-DMA, was synthesized using the solvothermal method. The structure of the MOF was characterized using scanning electron microscopy-energy dispersive X-ray spectroscopy, N 2 adsorption–desorption isotherms, X-ray diffraction analysis, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, and Mössbauer spectroscopy. Batch adsorption experiments were performed to investigate the effects of initial Sr 2+ and Cs + concentrations, adsorption time, pH, and coexisting cations on the adsorption performance of the material. The adsorption mechanism was further elucidated using adsorption kinetics and isotherm models. The results indicated that the adsorption of Sr 2+ and Cs + does not significantly affect the MOF material structure. As reaction time and initial ion concentration increased, the adsorption capacity of MIL-100(Fe)-DMA for Sr 2+ and Cs + increased rapidly and then gradually reached equilibrium. Optimal adsorption occurred under alkaline conditions, with maximum adsorption capacity observed at pH = 8. The adsorption process for Sr 2+ and Cs + was well described by the pseudo-second-order kinetic model, the Weber–Morris model, and the Langmuir adsorption isothermal model. The adsorption process was mainly identified as monolayer chemical adsorption, influenced by multiple factors. Characterization combined with density functional theory calculations revealed that the unsaturated carboxylic acid groups on the surface of the MOFs play a crucial role in the interaction with Sr 2+ and Cs + .
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ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Qinrui Fu,Yuan Meng,Zilin Fang,Quanqin Hu,Liang Xu,Wenhua Gao,Xiaochun Huang,Qiao Xue,Ya-Ping Sun,Fushen Lu
Boron nitride nanosheets (BNNS) were used to anchor bimetallic Pd–Fe nanoparticles for Suzuki–Miyaura coupling catalysts. The bimetallic nanoparticles were found to be core–shell in structure, and their formation was likely facilitated by their interactions with the BNNS. The Pd–Fe/BNNS catalysts were highly effective in representative Suzuki–Miyaura reactions, with performances matching or exceeding those of the state-of-the-art methods. Specifically, the superior catalytic activities were characterized by generally shortened reaction times, minimal Pd usage, excellent reusability of the catalysts and high or nearly quantitative conversion yields in a benign solvent system without the need for any special conditions, such as ligands and surfactants or inert gas protection. The obvious advantages of the Pd–Fe/BNNS over similar catalysts based on other supports, such as reduced graphene oxide (rGO), suggest that BNNS may be developed into a versatile platform for many other important catalytic reactions.
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高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Huan Zhang,Yi Tan,Jiayan Li,Bing Xue
The performances of rayon (RGF) and polyacrylonitrile (PGF) based graphite felts as electrodes are compared in the iron-chromium redox flow battery (ICRFB). The essential differences in structure between RGF and PGF are also characterized in this study. The results show that the RGF electrode displays excellent electrochemical performance for negative redox couple (Cr 3+ /Cr 2+ ), resulting in the cell with higher charge efficiency and slower capacity decay. However, due to the high degree of graphitization and electrochemical activity for positive redox couple (Fe 2+ /Fe 3+ ) in PGF, the cell using PGF has higher voltage efficiency and energy efficiency, as well as lower area surface resistance than the cell with RGF. The fundamental difference between RGF and PGF is the crystallites structure in radial direction and basal plane of the fiber. PGF with the core-rim structure has better graphitization stacked in radial direction of the fiber. Further, PGF has more defective carbons exposed in the basal planes, while the surface of RGF exhibits a higher concentration of oxygen functional groups. The role of catalysts in the ICRFB has also been studied by introducing bismuth (Bi) into RGF and PGF used as negative electrodes. The electrocatalytic activities of RGF and PGF before and after modification with Bi are investigated by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS). Bismuth deposition on the negative electrode is found to improve the negative reaction in ICRFB.
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