RARE METALS
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2025
·
IF 11
Fan Siyu,Xu Tianxi,Yang Hui,Ge Yan,Wang Genlin,Ohno Teruhisa,Xu Bin
In this study, a novel Ce-based metal–organic framework (Ce–OFDC) was synthesized via the hydrothermal method. To enhance its photocatalytic antimicrobial properties, polymeric carbon nitride (PCN) was incorporated into the Ce-OFDC matrix, forming a Ce-OFDC/PCN composite material. Antibacterial assays demonstrated that Ce-OFDC/PCN had significant inhibitory effects on both Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ), achieving inhibition rates of 99.5% and 94.3%, respectively. Notably, the antibacterial performance of Ce-OFDC/PCN was superior to that of Ce-OFDC or PCN alone. Furthermore, photocurrent and electrical impedance scanning measurements demonstrated that the Ce-OFDC/PCN composites showed improved photocurrent response and superior efficiency in separating photogenerated electrons and holes. The photocurrent density of Ce-OFDC/PCN reached 120 μA cm −2 , which was 1.5 times higher than that of PCN (80 μA cm −2 ) and 12 times higher than that of Ce-OFDC (10 μA cm −2 ). Electron paramagnetic resonance analysis indicated that reactive oxygen species played a crucial role in the antimicrobial process, with superoxide radicals (·O 2 − ) and hydroxyl radical (·OH) showing the most prominent influence. We conducted reactive oxygen species (ROS) scavenging experiments to further confirm this view. After adding glutathione (GSH) to remove all ROS, the antibacterial efficiency of Ce-OFDC/PCN decreased by about 40%. Adding D-mannitol to remove ·OH reduced the inhibition rate to 54.7%, and adding superoxide dismutase (SOD) to remove ·O 2 − reduced the inhibition rate to 65.4%. The Ce-OFDC/PCN heterostructure increased the separation efficiency of photogenerated electrons and holes, producing increased reactive oxygen species. That, in turn, contributed to the observed superior photocatalytic antibacterial performance. This research significantly advanced the development of metal–organic framework (MOF)-based materials and provided valuable insights into the design of antimicrobial photocatalysts. Graphic abstract
研究领域:
材料科学
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环境科学
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纳米技术
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化学工程
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微生物学
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2024
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IF 7.4
Yiqian Lv,Jingmao Zhao,Baomin Fan,Hassan Murtaza,Jingbao Wang,Weixiao Jing,Liuwei Chao
Synergistical passive barrier enhancement and active self-healing has been an emerging tactic for developing prominent anti-corrosion coatings. Herein, a cerium/2-methylimidazole metal-organic framework (Ce-MOF) was that is in-situ grown on ultrathin α-ZrP nanosheets with outstanding dispersibility. The parallel arrangement of α-ZrP-based nanosheets within the epoxy matrix was driven by shear force from blade-coating technology optimizing the coating's physical barrier and self-repairing capability. This advancement may herald a new era in designing smart coatings and offering potent protection against diverse corrosion types such as filiform corrosion.
研究领域:
材料科学
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腐蚀工程
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纳米技术
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涂层技术
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2019
·Vol. 25
·期 9
·4447-4457
·
IF 2.289
Zhang Jing,Chen Lu,Yang Ke
This work proposed a novel and facile in situ precipitation procedure for synthesis of CuO nanoparticles decorated hierarchical Ce-metal-organic framework nanocomposite (CuONPs/Ce-MOF). The Ce-MOF and CuONPs/Ce-MOF was characterized using electron microscopies, X-ray diffraction, X-ray photoelectron spectroscopy, and thermogravimetry analysis, which showed CuONPs uniformly on straw-sheaf-shaped Ce-MOF surface. In 0.1 M NaOH, CuONPs/Ce-MOF modified electrode showed excellent electrocatalytic activity to glucose oxidation, and the modified electrode was employed to construct a non-enzymatic glucose sensor. The proposed sensor displayed a wide linear range of 5 nM–8.6 mM spanned 6 orders of magnitude, an untrasensitivity of 2058.5 μA mM −1 cm −2 , and a low detection limit of 2 nM (S/ N = 3). In addition, this sensor displayed excellent repeatability, reproducibility, stability, and selectivity, and the results of glucose detection in human blood serum were very accurate. All these results indicated that CuONPs/Ce-MOF-modified electrode was a promising candidate for practical non-enzymatic sensing for glucose.
研究领域:
材料科学
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分析化学
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生物医学工程
✓ 已验证
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Yiqing Wu,Xiangmei Ma,Bin Wang,Yanan Li,Shengtao Gao
The detrimental effects of ultraviolet (UV) and electromagnetic (EM) radiation on human health and physiological functions are well documented. The development of efficient shielding materials to mitigate these effects is therefore an urgent necessity. In this study, Zn/Ti-LDH@Ce/Fe-MOF@PPy composites were successfully prepared by hydrothermal synthesis and interfacial polymerisation. The properties of the composites were compared and analysed with those of pure Zn/Ti-LDH and Ce/Fe-MOF, and the results show that the prepared materials have excellent comprehensive properties, with a broad EAB of 5.2 GHz and a RL min of −46.2 dB at 14.8 GHz at the thickness of 3 mm, while exhibiting excellent UV shielding capability.The present study offers novel concepts and efficacious methodologies for the engineering of high-performance microwave absorbing and UV shielding materials.
研究领域:
材料科学
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环境科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2018
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IF 6.434
Xueyue Mi,Jingjing Han,Yan Sun,Yi Li,Wenping Hu,Sihui Zhan
Development of an efficient cathode in advanced oxidation process is an important challenge. In this work, we synthesized a low-cost, high-catalytic-active and stable reduced graphene oxide (RGO)-Ce/WO 3 nanosheets (RCW) to modify carbon felt (CF) as cathode to degrade ciprofloxacin (CIP) in electro-Fenton process. Compared to traditional heterogeneous electro-Fenton process, carbon black was substituted by RGO and poly tetra fluoroethylene was avoided to be used as binder. We found that RCW/CF cathode reached about 100% degradation efficiency of CIP after 1 h and 98.55% mineralization degree after 8 h. Meanwhile, it had a very high current density, about 2.5 times that of CF. RCW/CF cathode produced more O 2 − , H 2 O 2 and OH via one-electron reduction process (O 2 → O 2 - →H 2 O 2 ). The modified cathode kept a stable performance for high CIP degradation efficiency during 5 cycles. The introduction of RGO could promote electron transfer, and the adding of Ce into the WO 3 lattice provided superior conditions for the adsorption and activation of oxygen molecules, thus promoting the formation of active oxygen species on the surface of RCW. This novel RCW/CF composite is an efficient and promising electrode for removal of CIP in the wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Nanomedicine
·
2024
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IF 6.6
Yan Yang,Yiling Wang,Xinran Jiang,Jiahao Mi,Dizhang Ge,Yuna Tong,Yuxuan Zhu
Introduction Alzheimer’s disease (AD), a neurodegenerative condition, stands as the most prevalent form of dementia. Its complex pathological mechanisms and the formidable blood-brain barrier (BBB) pose significant challenges to current treatment approaches. Oxidative stress is recognized as a central factor in AD, underscoring the importance of antioxidative strategies in its treatment. In this study, we developed a novel brain-targeted nanoparticle, Ce/Zr-MOF@Cur-Lf, for AD therapy.Methods Layer-by-layer self-assembly technology was used to prepare Ce/Zr-MOF@Cur-Lf. In addition, the effect on the intracellular reactive oxygen species level, the uptake effect by PC12 and bEnd.3 cells and the in vitro BBB permeation effect were investigated. Finally, the mouse AD model was established by intrahippocampal injection of Aβ1-42, and the in vivo biodistribution, AD therapeutic effect and biosafety of the nanoparticles were researched at the animal level.Results As anticipated, Ce/Zr-MOF@Cur-Lf demonstrated efficient BBB penetration and uptake by PC12 cells, leading to attenuation of H2O2-induced oxidative damage. Moreover, intravenous administration of Ce/Zr-MOF@Cur-Lf resulted in rapid brain access and improvement of various pathological features of AD, including neuronal damage, amyloid-β deposition, dysregulated central cholinergic system, oxidative stress, and neuroinflammation.Conclusion Overall, Ce/Zr-MOF@Cur-Lf represents a promising approach for precise brain targeting and multi-target mechanisms in AD therapy, potentially serving as a viable option for future clinical treatment.
研究领域:
神经科学
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药学
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纳米技术
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痴呆症研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
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2024
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IF 5.2
Yanan Jiang,Huayu Sun,Yuzhen Fang,Cuijuan Zhang,Yuan Liu
The sintering issue of Ni nanoparticles seriously limits the practical application of the Ni-based catalysts for CO 2 methanation. This work demonstrates that the La- and Ce- dual-promoted Ni/ZrO 2 shows better durability at 600 ºC and 60000 mL g cat −1 h −1 over 200 h compared with the La- or Ce- single-promoted. The composition and microstructure characterization indicates that the dispersion and sintering resistance of Ni nanoparticles is enhanced with the dual-promoted catalysts. Both depth profile of X-ray photoelectron spectroscopy and density functional theory calculation show that in the La- and Ce- dual-promoted Ni/ZrO 2 , the reduced dissolution of Ce into ZrO 2 lattice and the spread of La on ZrO 2 surface by forming a La 2 O 3 -CeO 2 solid solution improves the dispersion and stability of Ni nanoparticles. This work provides a facile strategy to mitigate the sintering of Ni nanoparticles and thus improve the stability of Ni-based catalysts for CO 2 methanation.
研究领域:
催化
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材料科学
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化学工程
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表面科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Na Tian,Xike Tian,Yulun Nie,Chao Yang,Zhaoxin Zhou,Yong Li
Peroxymonosulfate (PMS) activation has drawn increasing attention in eliminating the recalcitrant organic pollutants in water. Manipulation of generated reactive oxygen species (ROS) over Ce doped Mn 2 O 3 during the PMS activation was firstly reported for the complete degradation of 2,4-dichlorophenol (2,4-DCP) in this study. Ce in-situ introduction can greatly enhance the PMS activation performance of Mn 2 O 3 . For example, 100% of 2,4-DCP degradation can be obtained at 90 min over 4 wt% Ce doped Mn 2 O 3 at pH 7 (82.1% for Mn 2 O 3 at 90 min). The reaction rate constant ( k ) was also about 3.6 times higher than that of Mn 2 O 3 (0.0668 min −1 for Ce doped Mn 2 O 3 vs. 0.0186 min −1 for Mn 2 O 3 ). Besides 1 O 2 , OH and SO 4 − were identified and involved in 2,4-DCP degradation process over Ce doped Mn 2 O 3 , while only 1 O 2 was detected over 3D Mn 2 O 3 . Moreover, the contribution of OH and SO 4 − to 2,4-DCP degradation can be regulated by adjusting the Ce doping amount. The key role of Ce substitution in the regulation of reactive oxygen species was further investigated by XPS and electrochemical experiments. The Ce dopant can lead to a higher current density and greater reductive capability due to the improved charge transfer capability, which is important to the generation of more aggressive OH and SO 4 − and complete 2,4-DCP degradation.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Xiang Li,Haixia Cui,Yanxi Zhong,Xiaoxi Zhou,Shuhong Xu,Shujuan Liu,Chunlei Wang
Lead halide perovskite scintillators have recently received extensive research attention owing to their short fluorescence lifetimes, low detection limits, and ease of fabrication compared to traditional scintillators. The nontoxic cerium-doped lead-free perovskites with intrinsically efficient and short lifetime d–f transitions are a prospective replacement for the toxic Pb 2+ . Here, we demonstrated Ce-doped cesium lanthanide chloride perovskites (Cs 3 LnCl 6 , Ln = Gd, Y, Lu) synthesized through a facile solution method for the first time. These perovskites exhibit blue-violet emission, which arises from Ce 5d → 4f transitions. Among three types of Cs 3 LnCl 6 perovskites, Ce:Cs 3 LuCl 6 exhibited high photoluminescence quantum yield (PLQY) of 82% and a short excited-state lifetime of approximately 34 ns. When utilized as X-ray scintillators, Ce:Cs 3 LuCl 6 crystals display a high light yield of 8120 photons per MeV and a low detection limit of 36.8 nGy air s −1 . Importantly, the figure of merit (FoM), representing the ratio of light yield to decay time, reaches 239, which is the highest reported value for lead-free perovskite scintillators up to now. Additionally, the fabrication of perovskite/PMMA films was undertaken for practical demonstrations in X-ray imaging, resulting in the attainment of a resolution of up to 8.38 lp/mm. We anticipate that this work will inspire the utilization of Ce-doped Cs 3 LnCl 6 perovskites in ultrafast scintillation applications such as high-energy physics, nuclear reaction monitoring, and dynamic X-ray imaging.
研究领域:
材料科学
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物理学
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核科学
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放射学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2018
·
IF 0
Gui Liu,Lei Sun,Wei Luo,Yue Yang,Junhua Liu,Fang Wang,Curtis J. Guild
Aerobic Baeyer-Villiger oxidation of ketones into corresponding esters were performed over mesoporous Mn-Ce and Mn-Co composite oxides prepared by co-impregnation method and benzaldehyde was used as the sacrificing agent. It was found that the best conversion and selectivity were obtained when the Mn/Ce mole ratio was 1:2 (denoted as Mn 0.33 Ce 0.67 O s ) through investigating the effect of Mn/Ce mole ratio on the catalytic activity. Interestingly, Mn 0.33 Co 0.67 O s (Mn/Co mole ratio was 1:2) catalyst had no catalytic activity for this reaction. X-ray diffraction (XRD) results showed that MnO x was completely dissolved into the CeO 2 lattice, and Mn 0.33 Co 0.67 O s sample was existed in the form of spinel structure (Co, Mn) (Mn, Co) 2 O 4 and obvious peaks of Co 3 O 4 . Nitrogen adsorption-desorption measurements revealed that Mn 0.67 Ce 0.33 O s , Mn 0.5 Ce 0.5 O s , Mn 0.33 Ce 0.67 O s and Mn 0.33 Co 0.67 O s materials possessed mesoporous structure. X-ray photoelectron spectroscopy (XPS) analysis showed that the highest concentration of Ce 3+ on the surface of Mn 0.33 Ce 0.67 O s catalyst, which could create unsaturated chemical bonds, charge imbalance, and oxygen vacancies on the surface of samples, it is beneficial to the oxidation reaction. Additionally, XPS data revealed that Mn 0.33 Ce 0.67 O s catalyst has great potential in catalytic oxidation due to the large amount of active oxygen species on the surface. In addition, manganese and cobalt species on the surface of Mn 0.33 Co 0.67 O s are almost present in the form of Mn 2+ and Co 3+ , it is known that Mn 2+ can serve as a potent antioxidant and scavenge the activity of active oxygen species, while Co 3+ ions can prevent the formation of oxygen vacancies and inhibit the release of reactive oxygen species, thus the presence of Mn 2+ and Co 3+ inhibited the catalytic activity of Mn 0.33 Co 0.67 O s catalyst. The diffuse reflectance ultraviolet-visible spectroscopy (DR-UV-vis) and hydrogen temperature-programmed reduction (H 2 -TPR) results are in accordance XPS data.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
JOURNAL OF THE ENERGY INSTITUTE
·
2023
·
IF 5.7
Jinchang Liu,Tao Qin,Kuo Li,Xin Chen,Qiuxiang Lu,Jin Deng,Xiaodong Luo,Shenfu Yuan
In this work, the promotion mechanism of Ce as Fe and Ni catalyst promoter for the catalytic reforming of biomass pyrolysis volatiles was investigated. Fe–Ni–Ce/biochar catalysts were prepared and evaluated for their catalytic performance under N 2 and steam atmospheres. The yield of Fe–Ni–Ce/biochar catalyzed syngas (H 2 +CO) increased from 224.36 mL/g to 1299.14 mL/g (800 °C) with the change of N 2 to steam atmosphere. The addition of Ce can introduce a large number of oxygen vacancies to the catalyst, and the increase of oxygen vacancies reduces the reaction barrier of the tar, thus promoting the catalytic activity of the catalyst. In the N 2 atmosphere, the electron transfer of Ce 3+ ⇄ Ce 4+ during catalytic process promotes the production of Fe 2+ to ensure the catalytic activity of the catalyst. In the steam atmosphere, Ni will activate the active sites in a steam atmosphere in water molecules. The activated active sites increase the catalyst activity by cyclic reaction with the oxygen vacancies introduced by Ce, resulting in a higher catalytic capacity of Fe–Ni/biochar than Fe–Ce/biochar. To provide the theoretical basis for the preparation of efficient catalysts based on Fe and Ni.
研究领域:
能源与环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2018
·Vol. 8
·期 12
·642
·
IF 3.465
Yan Gao,Tao Luan,Mingyang Zhang,Wenke Zhang,Wenchen Feng
A series of Mn−Fe−Ce−Ox/γ-Al2O3nanocatalysts were synthesized with different Mn/Fe ratios for the catalytic oxidation of NO into NO2and the catalytic elimination of NOxvia fast selective catalytic reduction (SCR) reaction. The effects of Mn/Fe ratio on the physicochemical properties of the samples were analyzed by means of various techniques including N2adsorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), H2-temperature-programmed reduction (TPR), NH3-temperature-programmed desorption (TPD) and NO-TPD, meanwhile, their catalytic performance was also evaluated and compared. Multiple characterizations revealed that the catalytic performance was highly dependent on the phase composition. The Mn15Fe15−Ce/Al sample with the Mn/Fe molar ratio of 1.0 presented the optimal structure characteristic among all tested samples, with the largest surface area, increased active components distributions, the reduced crystallinity and diminished particle sizes. In the meantime, the ratios of Mn4+/Mnn+, Fe2+/Fen+and Ce3+/Cen+in Mn15Fe15−Ce/Al samples were improved, which could enhance the redox capacity and increase the quantity of chemisorbed oxygen and oxygen vacancy, thus facilitating NO oxidation into NO2and eventually promoting the fast SCR reaction. In accord with the structure results, the Mn15Fe15−Ce/Al sample exhibited the highest NO oxidation rate of 64.2% at 350 °C and the broadest temperature window of 75–350 °C with the NOxconversion >90%. Based on the structure–activity relationship discussion, the catalytic mechanism over the Mn−Fe−Ce ternary components supported byγ-Al2O3were proposed. Overall, it was believed that the optimization of Mn/Fe ratio in Mn−Fe−Ce/Al nanocatalyst was an extremely effective method to improve the structure–activity relationships for NO pre-oxidation and the fast SCR reaction.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）