Cerium-based Metal-organic Framework Research Articles

Constructing dual-ligand Ce-MOF on graphene oxide modified with polydopamine endowing polyurethane coating with long-term smart anti-corrosion and mechanical robustness

Traditional mono-functional anti-corrosion coatings are unable to meet the long-term corrosion resistance requirements of metal materials, therefore developing multifunctional anti-corrosion coatings have broad application prospects. In this work, long-lasting anti-corrosion coatings with superhydrophobic and self-healing properties were successfully prepared by in-situ growth of dual-ligand cerium-based metal–organic framework (Ce-MOF) on the surface of graphene oxide (GO), followed by chemical modification with polydopamine (PDA), resulting in 5B level of adhesion and excellent mechanical robustness. The superhydrophobic surface, as the external armor of the coating, can effectively block the penetrating path of corrosive media. Meanwhile, the MOF structure formed by the coordination of 2-mercaptobenzimidazole (2-M) with cerium ions endows the coating with smart self-healing properties and long-lasting corrosion resistance. Electrochemical tests showed that the low-frequency impedance modulus value of the superhydrophobic coating still reached 3.82 × 108 Ω cm2 after 30 days salt immersion. Due to the formation of protective films and insoluble precipitates at the defect site by 2-M and cerium ions, the scratches on the coating were significantly reduced after 40 days salt spray experiment, demonstrating the self-healing ability of the coating. This multifunctional anti-corrosion coating provides a new approach for preparing coatings with long-term effective corrosion resistance.

Recovery of Bis(2-hydroxyethyl) terephthalate and terephthalic acid from waste PET bottles for synthesis of cerium-based metal-organic frameworks: A study towards supercapacitor applications

Controlled chemical recycling of plastic waste is a most important concern to reduce plastic waste as well as effective recovery of the various byproducts without toxic emission. In this study, we focused on effective recovery of Bis-2-hydroxyethylene terephthalate (r-BHET) from polyethylene terephthalate (PET) waste via solvent free melt depolymerization process. Recovered BHET was converted into terephthalic acid (r-TPA) by hydrolysis. Both r-BHET and r-TPA were used to construct a metal organic framework (MOF) with cerium metal for potential energy applications. Extensive characterization, including Fourier Transform Infrared Spectroscopy (FTIR), Nuclear Magnetic Resonance (NMR), Field Emission Scanning Electron Microscopy (FE-SEM), and Energy-Dispersive X-ray Spectroscopy (EDX) were confirmed the structural integrity and purity of the r-BHET and r-TPA and provides insights into the well-defined structure and elemental composition of the MOFs. The specific capacitances of BHET and TPA-Ce-MOF were found to be 91.5 and 220.1 F/g respectively. Comprehensive characterization ensures the quality of the recovered products and synthesized MOFs, promoting environmentally conscious strategies in materials synthesis and energy storage applications.

A novel label-free electrochemical immunosensor based on Ce-MOF@AgAuNPs for highly sensitive detection of monensin

A novel electrochemical immunosensor for the sensitive detection of monensin (MON) was developed. The sensor platform utilized anti-MON monoclonal antibodies and a nanocomposite (Ce-MOF@AgAuNPs), composed of cerium-based metal-organic frameworks decorated with silver-gold nanoparticles. The physicochemical properties of the Ce-MOF@AgAuNPs nanocomposite were investigated using transmission electron microscopy, energy dispersive X-ray, UV–Vis spectrophotometry, and fourier transform infrared techniques. The stepwise fabrication process and electrochemical performance of the immunosensor were investigated through electrochemical impedance spectroscopy and cyclic voltammetry. The sensor exhibited excellent analytical performance for MON detection, with a wide linear response range from 0.05 to 250 ng mL−1 and a low LOD of 0.008 ng mL−1. Additionally, the immunosensor exhibited high accuracy, with recovery rates ranging from 97.4% to 103.2% in chicken liver and 96.0%–104.7% in milk. This developed immunosensor shows great potential for food safety applications, demonstrating high specificity, stability, and reproducibility in the detection of MON.

Ratiometric fluorescent composites united metal-organic frameworks sensing system for detection of methyl-paraoxon

Organophosphorus pesticide residues pose significant risks to human health, but conventional analytical methods are costly and complex. To address this, we developed a new environmentally friendly technique using a simple hydrothermal method to create a ratiometric fluorescent composite (RFC) with two distinct signals: blue and orange. This RFC allowed for rapid detection and quantitative analysis of organophosphorus pesticides. The composite incorporated a cerium-based metal–organic framework (Ce-UiO-66), which could degrade methyl paraoxon (MP) due to the two oxidation states of cerium. The resulting degradation product, p-nitrophenol (p-NP), specifically quenched the blue fluorescence of the RFC via the inner filter effect (IFE), while the orange fluorescence remained unaffected, ensuring consistency under microenvironmental and spectrometer conditions. This innovative approach was sensitive, with a detection limit of 0.55 μM, selective, and repeatable, offering a new strategy for pesticide analysis and safety evaluation of edible and medicinal plant and water samples.

Copper/ cerium metal organic frame work as highly efficient structures for solar power-induced hydrogen generation through the process of water splitting

Increased dependence on fossil fuels as energy sources strongly contributes in both global warming and environmental pollution, leading to serious impacts on human-beings and societies. Therefore, shift from hydrocarbon-based energy to alternative green, sustainable and renewable sources of energy has been globally stimulated in past decades. In an agreement with this context, hydrogen is counted as one of these sources which has been paid strong attention recently due to its high energy content and no harmful emissions. Consequently, this study introduces production of clean green hydrogen through the process of photocatalytic water splitting which is a cost-effective route and releases zero emissions. A series of copper/ or cerium based metal–organic frameworks were successfully prepared via one-pot solvothermal technique and were presented as three novel photocatalysts for hydrogen production from water. The photocatalytic performances of these structures were investigated under visible light irradiation, revealing the highest activity for copper doped cerium metal–organic framework. It exhibited a maximum pure hydrogen productivity of 465 mmol per hour/ gram which was much higher than those the detected productivity by copper and cerium metal–organic frameworks (289 and 375 mmol per hour/ gram respectively). Heterojunction between the two central metals as well as effective charge separation in copper doped cerium metal–organic framework are reasons of its superiority in hydrogen evolution exploit, compared to the other two structures. The recyclability of copper doped cerium metal–organic framework demonstrated high reliability since it showed nearly stable yields of hydrogen over ten cycles of photocatalytic reuse. Therefore, the presented binary metals organic framework establishes new platform for photocatalysts in process of hydrogen production through water splitting.

Snowflake-like Ce-BTC@MoS2 heterojunction for high-performance uric acid detection

The analysis of uric acid (UA) in urine is adopted as a standard method for diagnosing related diseases, which provides an effective way for non-invasive detection of UA. However, no portable instruments presently can take an effective detection of UA in urine due to their detection limit, the indicator mainly impacted by sensitive materials. Hence, it is crucial to design electrochemical biosensor electrode materials with high sensitivity and the wide linear region for the detection of UA in urine. This research critically reveals a snowflake-like complex by simply combining the cerium-based metal-organic framework (Ce-BTC) and MoS2. The excellent electrochemical performance of Ce-BTC@MoS2 origins from the strong interfacial electronic interactions between Ce-BTC and MoS2 heterojunction and abundant active sites for UA oxidation. The Ce-BTC@MoS2 exhibits sensitivity (300.29 μA mM−1cm−2) for UA much higher than that of pristine Ce-BTC (129.14 μA mM−1cm−2) as well as MoS2 (209.71 μA mM−1cm−2) in the linear region from 5 to 2500 μM. The outstanding selectivity, excellent stability and attractive repeatability of the UA sensor fabricated by Ce-BTC@MoS2 have been also demonstrated, on account of the unique heterojunction of the electrode material. Additionally, the extensive linear region (0.5–4.4 mM) for the Ce-BTC@MoS2 sensor will be employed to analyze the concentration of UA in urine which can be directly measured without being processed. The prepared urine UA detector combined with the commercial blood UA detector provides an important basis for the comprehensive UA detection and clinical diagnosis.

Tribovoltaic Effect Strengthened Microwave Catalytic Antibacterial Composite Hydrogel.

Microwave (MW) therapy is an emerging therapy with high efficiency and deep penetration to combat the crisis of bacterial resistance. However, as the energy of MW is too low to induce electron transition, the mechanism of MW catalytic effect remains ambiguous. Herein, a cerium-based metal-organic framework (MOF) is fabricated and used in MW therapy. The MW-catalytic performance of CeTCPP is largely dependent on the ions in the liquid environment, and the electron transition is achieved through a "tribovoltaic effect" between water molecules and CeTCPP. By this way, CeTCPP can generate reactive oxygen species (ROS) in saline under pulsed MW irradiation, showing 99.9995 ± 0.0002% antibacterial ratio against Staphylococcus aureus (S. aureus) upon two cycles of MW irradiation. Bacterial metabolomics further demonstrates that the diffusion of ROS into bacteria led to the bacterial metabolic disorders. The bacteria are finally killed due to "amino acid starvation". In order to improve the applicability of CeTCPP, It is incorporated into alginate-based hydrogel, which maintains good MW catalytic antibacterial efficiency and also good biocompatibility. Therefore, this work provides a comprehensive instruction of using CeTCPP in MW therapy, from mechanism to application. This work also provides new perspectives for the design of antibacterial composite hydrogel.

Efficient adsorption and desorption of elemental mercury by ordered mesoporous cerium oxide nanoparticles derived from Ce-based metal–organic frameworks

Metal oxide-based adsorbents not only exhibit effective elemental mercury (Hg0) removal capacity but also offer suitability for wet desorption, which is a green treatment method to avoid secondary contamination of deactivated adsorbents. Nevertheless, the limited dispersing capacity of the carrier restricts the loading of active substances, hindering further enhancement of adsorption capacity. The pore structure of adsorbent is also a key factor for wet desorption. In this work, we synthesized a hollow cerium-based metal–organic framework (Ce-mesoMOF) as a sacrificial precursor to obtain ordered mesoporous cerium oxide (OM-CeO₂) via a mesoporous genetic pyrolysis-oxidation mechanism. OM-CeO2 inherits the excellent structural properties of mesoporous MOF with better catalytic activity, exhibiting strong adsorption capacity in various atmospheres (97.6 % in pure N2, 98.8 % in N2 + H2S). Wet desorption of Hg compounds and reduction of the active site can be synergized in Na2S2O3 solution. The octahedral structure with an ordered mesoporous shell greatly facilitates the mass transfer process, as evidenced by the strong adsorption capacity and fast kinetic parameters of OM-CeO2. Density functional theory analysis reveals that the conversion reaction of adsorbed Hg has a low energy barrier on the pyrolytic-oxidized OM-CeO2 and the inhibitory effect of reactive S for Hg0 adsorption transforms into a facilitating effect. This study leverages the structural advantages of ordered mesoporous MOFs in the field of Hg adsorption and imparts reactivity through modification for efficient adsorption–desorption.

Selective capture of iodate anions by a cerium-based metal-organic framework

Selective capture of iodate anions by a cerium-based metal-organic framework

A Propeller-Like Ligand-Directed Construction of a Tetranuclear Cerium-Organic Framework for Single-Step Ethylene Purification from Ternary C2 Mixtures.

The efficient single-step purification of ethylene from ternary C2 mixtures containing ethane and acetylene is challenging and demanding. Herein, we introduce a novel cerium-based metal-organic framework (MOF) of Ce-NTB-rtk synthesized via a ligand-conformer strategy. The Ce-NTB-rtk features a rare tetranuclear cerium cluster and 2D kgd layers pillared by a 3D rtl framework concomitant with an extraordinary (3,3,12)-c network. The compound encompasses microporous cavities replete with a nonpolar microenvironment. Gas sorption and breakthrough experiments demonstrate its superior affinity for C2H6 and C2H2 over C2H4, enabling effective single-step ethylene purification. Computational simulations reveal that preferential adsorptions are facilitated by different interaction strengths of C-H···O hydrogen bonds. The performance of Ce-NTB-rtk in separation selectivity and regeneration capacity makes it a promising candidate for sustainable and cost-effective ethylene purification, showcasing the potential of MOFs in advanced gas separation applications.

Optimization of cerium-based metal–organic framework synthesis for maximal sonophotocatalytic tetracycline degradation

Wastewater treatment is inevitably required to alleviate the pollution of water resources by various contaminants such as antibiotics. MOFs are novel materials with photocatalytic activities. In this study, sonophotocatalytic degradation of tetracycline (TC) by the Cerium-based MOF (Ce-MOF) is optimized by modification of its synthesis route. Ce-MOF synthesis by room temperature (RT), hydrothermal (HT), and sonochemical synthesis (SC) are studied. TC degradation experiments revealed the superiority of SC synthesis. The interplay of main synthesis parameters, namely, initial ligand concentration, ultrasound (US) power and time on sonophotocatalytic activity of Ce-MOF, were investigated by response surface methodology model (RSM) utilizing the central composite experimental design (CCD). The optimum SC synthesis conditions are an initial ligand concentration of 8.4 mmol/L, a sonication power of 50 amplitude, and a US time of 60 min. The optimally synthesized Ce-MOF was characterized by infrared spectroscopy, FTIR, XRD, FE-SEM, TEM, zeta potential analysis, diffuse reflectance spectroscopy, particle size analysis, Mott-Schottky analysis, photocurrent analysis, electrochemical impedance spectra, and photoluminescence spectroscopy. The findings indicate that the removal efficiency of TC can reach up to 81.75% within 120 min in an aqueous solution containing an initial TC concentration of 120 ppm and 1 g/L Ce-MOF at pH of 7. Mineralization efficiency of the process is 71% according to COD measurements. The Ce-MOF catalyst retained its chemical stability and remained active upon TC degradation which makes it a promising candidate for wastewater treatment.

Cerium-Based Metal–Organic Framework Nanocrystals for Colorimetric Screening of α-Glucosidase Inhibitors

Cerium-Based Metal–Organic Framework Nanocrystals for Colorimetric Screening of α-Glucosidase Inhibitors

Porous CePO4@carbon composite derived from cerium-based metal–organic framework for the simultaneous detection of dopamine, uric acid, and acetaminophen

Cerium phosphate (CePO4) has attracted increasing attention in the field of electrochemistry. In this work, a mesoporous CePO4@carbon composite was successfully prepared via the high-temperature calcination method using cerium-based metal–organic framework (Ce-MOF) as a precursor. The obtained samples were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), N2 adsorption–desorption technique, and X-ray photoelectron spectroscopy (XPS). The findings revealed that the in-situ pyrolysis of Ce-MOF generated uniform composite, which showed high electrical conductivity and plenty of catalytic active sites. These structural advantages of the composite were conductive to the electron transfer, substrate diffusion, and redox reactions. Thereafter, CePO4@carbon was developed to modify the commercially purchased glass carbon electrode (GCE: CHI 104) for simultaneous detection of dopamine (DA), uric acid (UA), and acetaminophen (APAP). The linear detection ranges for DA, UA, and APAP were 2.5–310.0 μM, 3.0–305.0 μM, and 2.5–617.0 μM, respectively. The detection limits (LOD) for DA, UA, and APAP were 0.009 μM, 0.016 μM, and 0.014 μM, respectively. Furthermore, the constructed electrode can be employed to detect the concentration of DA, UA, and APAP in real-samples. This work provides a method for manufacturing highly efficient CePO4 based materials for electrochemical sensing.

Investigating replacement core-shell strategies for optimizing photocatalytic chromium reduction with MOF-on-MOF heterostructure on steel mesh

While cerium-based metal-organic frameworks (Ce-MOFs) exhibit inherent limitations in standalone photocatalytic efficacy, their potential amplifies when integrated into heterostructures with other semiconductors, leveraging the advantageous heterojunction effects. This study systematically explores the establishment of heterojunctions between Ce-MOFs and zirconium-based frameworks, delineating the performance variance based on the positioning of Ce-MOFs within the MOF-on-MOF architecture. When situated as the outer shell in these configurations, Ce-MOFs significantly enhance the photocatalytic capabilities compared to their placement in the core. Further, immobilizing these composite structures onto steel substrates demonstrates remarkable efficiency in the purification of hexavalent chromium from water under visible light exposure. Initially, Ce-MOF-801-on-Zr-MOF-801 and Zr-MOF-801-on-Ce-MOF-801 heterojunctions were synthesized to explore their combined and MOF-on-MOF effects. Subsequently, Ce-MOF-801-on-Zr-MOF-801 was applied onto a steel mesh substrate using the spraying method. The results demonstrated exceptional efficiency in Cr(VI) extraction and remarkable durability. Crucially, leaching tests and ICP-OES analysis confirmed the material's strong adhesion to the substrate, enabling repeated use. Impressively, even after multiple cycles, the material efficiently purified Cr(VI) from water within 120 min under visible light. With all these merits, the Cr(VI) removal efficiency of Ce-MOF-801-on-Zr-MOF-801/mesh with an initial Cr(VI) concentration of 5 ppm is near 100% for 2 h. This work presents a feasible and promising route to filter suitable photocatalyst materials by using mesh substrates for fixing environmental issues.

Cerium‐based metal–organic frameworks (MOFs) as a sustainable approach to mitigating environmental stress‐induced intestinal ulcers in earthworms

Exposure to environmental stresses such as heavy metal pollution, herbicides, and climate change may cause adverse effects on biological animals such as earthworms, leading to conditions including intestinal ulcers. This study outlines the potential of a cerium‐based metal–organic framework (Ce‐MOF) in healing alcohol‐induced ulcers in earthworms. The Ce‐MOF was synthesized via a solvothermal technique and analyzed using X‐ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. Ce‐MOF exhibited a one‐dimensional channel and demonstrated multi‐enzyme‐like activity. It was examined on earthworms suffering from ulcers caused by alcohol use. Examinations at a macroscopic level, histological analysis, and transmission electron microscopy images showed significant harm to the intestinal lining in ulcerated worms. The ulcer treatment with Ce‐MOF substantially enhanced intestinal morphology, repaired the epithelial lining, and facilitated ulcer healing. Furthermore, Ce‐MOF decreased the death rate and enhanced the weight of earthworms in comparison to untreated groups. This study emphasizes the potential of Ce‐MOF as an innovative therapeutic agent for alcohol‐induced ulcers, emphasizing its prospective uses in regenerative medicine and tissue regeneration.

Degradation of Levofloxacin by Electroactivated Sodium Persulfate on Carbon Cloth Cathode Modified with Cerium-Based Metal Organic Frameworks (Ce-MOF) Derivatives

Levofloxacin (LFX), which is difficult to degrade effectively due to its molecular stability, has become an problem that needs to be solved urgently. The advanced oxidation technology of persulfate has received increasing attention from researchers. In this study, a Ce-MOF derivative (Ce-MOF-T) was prepared by hydrothermal synthesis and calcination, which synergistically responded to electroactivation to generate sulfate radicals for the efficient degradation of LFX. It has been proven that electrical activation and the Ce-MOF derivatives work together to generate sulfate radicals and effectively degrade LFX. Ce-MOF-550-modified carbon cloth was used as the cathode and a platinum electrode as the anode, the concentration of LFX was 20 mg·L−1, the loading of Ce-MOF-550 was 15 mg, pH = 5, the concentration of sodium persulfate (PMS) was 0.3 g·L−1, the current density was 100 A·m−2, and the degradation rate was 82.05% after 1 h of reaction and 95% after 3 h of reaction. After five cycle tests, the degradation rate was still higher than 75.00%, indicating that the material had good stability. In addition, the degradation of LFX was consistent with a quasi-primary kinetic reaction with apparent rate constants of 2.26 × 10−2 min−1.

Synthesis, Structure and (Photo)Catalytic Behavior of Ce-MOFs Containing Perfluoroalkylcarboxylate Linkers: Experimental and Theoretical Insights.

Cerium-based Metal-Organic frameworks (Ce-MOFs) are attracting increasing interest due to their similar structural features to zirconium MOFs. The redox behavior of Ce(III/IV) adds a range of properties to the compounds. Recently, perfluorinated linkers have been used in the synthesis of MOFs to introduce new characteristic into the structure. We report the synthesis and structural characterization of Ce(IV)-based MOFs constructed using two perfluorinated alkyl linkers. Their structure, based on hexanuclear Ce6O4(OH)4 12+ clusters linked to each other by the dicarboxylate ions, has been solved ab-initio from X-ray powder diffraction data and refined by the Rietveld method. The crystallization kinetics and the MOF formation mechanism was also invesitigated by Synchrotron radiation with XAS spectroscopies (EXAFS and XANES). The MOFs present the same fcu cubic topology as observed in MOF-801 and UiO-66, and they showed good stability in water at different pH conditions. The electronic structure of these MOFs has been studied by DFT calculations in order to obtain insights into the density of states structure of the reported compounds, resulting in band gaps in the range of 2.8-3.1 eV. Their catalytic properties were tested both thermally and under visible light irradiation for the degradation of methyl orange (MO) dye.

Mechanisms of metabolic regulation and enhanced methane production by hydrolytic nanozyme in sludge anaerobic digestion

Artificial nanozymes have demonstrated potential as natural enzyme substitutes due to their efficient biomacromolecule hydrolysis. However, the metabolic and catalytic mechanisms of nanozyme during the biodegradation of complex organics remain inadequately understood. This study evaluated the effect of the hydrolytic mechanism of cerium-based metal–organic frameworks (Ce-MOFs) hydrolytic nanozyme on shaping microbiome and metabolic functions. Biochemical methane potential test revealed that Ce-MOF-based hydrolytic nanozyme increased methane production by 7.8 − 22.2% as the hydrolytic nanozyme dosage increased from 50 to 150 mg/g VS. The highest methane production observed in 150 mg/g VS dosage of Ce-MOF (Ce-MOF-150) could be attributed to the enhanced sludge hydrolysis, acidogenesis, and methanogenesis processes, proven by the increased relative abundance of dominant acidogens and methanogens. Furthermore, 150 mg/g VS hydrolytic nanozyme bolstered the relative abundance of genes encoding acetyl-CoA carboxylase (accABCD) and involving in glycolysis (hxk and pfkA). These quantities were higher (8.31 − 34.14%) than that without nanozyme addition. The enhanced relative abundance of ackA, pta, cdhCDE, mvhAD, fpoABCDHIJKLMNO, vhoC, rnfABCDEG, mtrABCDEFGH, and hdrABC in the Ce-MOF-150 test indicated that the high proton conductivity of nanozyme facilitated acetoclastic methanogenesis and membrane-bound electron transport system, thereby enhancing methane production. These findings contribute to the expanding understanding of the application of artificial nanozymes as biocatalysts for solid waste resource recovery, providing a promising approach for methane production from sewage sludge.

Design strategies for MOFs-derived Ce10-xZrxOy catalysts with polyhedral coordination to enhance soot combustion

Various cerium-based metal–organic frameworks (Ce-MOFs and Ce10-xZrx-MOFs) and their derivatives (Ce10-xZrxOy complex oxide catalysts) with different structures and properties by modulating the organic ligands (i.e., trimesic acid (BTC), 1,2,4,5-benzenetetracarboxylic acid (PMA), and terephthalic acid (BDC)) and transition metal elements via the solvothermal method. The performance of these catalysts was tested in the diesel soot oxidation reaction. In contrast, morphology engineering and the introduction of heteroatom zirconium to modify CeO2 can significantly improve the catalytic activity and stability of the catalyst. Among them, the best Ce5Zr5Oy-BDC shows remarkable catalytic performance for soot oxidation, converting 90% of soot particles into CO2 at about 410 °C. A series of characterization results demonstrate that the engineering of morphology provides a highly active polycrystalline surface for the adhesion of reactants, and the electron transfer system caused by Zr doping weakens the Ce-O bond. With the help of their combined action, the exposed polycrystal surfaces greatly enhance the oxygen vacancy content and the ability to generate reactive oxygen species. The DFT investigations shows that the presence of Zr can weaken the Ce-O link, result in favorable defect structures, and the reactive oxygen species of formation were promoted. This study provides an idea for the design of non-precious metal catalysts with high activity and stability.

MOF-Derived CeO2 Nanorod as a Separator Coating Enabling Enhanced Performance for Lithium-Sulfur Batteries.

The deployment of Li-S batteries in the commercial sector faces obstacles due to their low electrical conductivity, slow redox reactions, quick fading of capacity, and reduced coulombic efficiency. These issues stem from the "shuttle effect" associated with lithium polysulfides (LiPSs). In this work, a haystack-like CeO2 derived from a cerium-based metal-organic framework (Ce-MOF) is obtained for the modification of a polypropylene separator. The carbon framework and CeO2 coexist in this haystack-like structure and contribute to a synergistic effect on the restriction of LiPSs shuttling. The carbon network enhances electron transfer in the conversion of LiPSs, improving the rate performance of the battery. Moreover, CeO2 enhances the redox kinetics of LiPSs, effectively reducing the "shuttle effect" in Li-S batteries. The Li-S battery with the optimized CeO2 modified separator shows an initial discharge capacity of 870.7 mAh/g at 2 C, maintaining excellent capacity over 500 cycles. This research offers insights into designing functional separators to mitigate the "shuttle effect" in Li-S batteries.