CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Kun Hu,Qingjie Xie,Huijuan Wang,Bo Zhang,Yuyue Huang,Shilin Song,Huihui Zhang,Yixiao Ding,Hai Huang,Chundu Wu
In this paper, degradation of ciprofloxacin (CIP) in a circulating dielectric barrier discharge (DBD) plasma system with Cu-CeO 2 @CA composite films addition was investigated. The Cu-CeO 2 @CA films were synthesized through hydrothermal method, and the samples were characterized by SEM , XRD, EDS, FT-IR and Raman spectra analysis. The obtained results show that there was synergistic effect of the DBD plasma and the Cu-CeO 2 @CA films on the CIP degradation and mineralization. The optimal performance was obtained under the condition of 5 wt% Cu-CeO 2 nanoparticles doping in the composite film. Besides the effect of the DBD plasma, the Cu-CeO 2 @CA films could drive the O 3 decomposition, photocatalysis and then the more reactive oxygen species (ROS) formation. The presence of the main active species and their contributions to the CIP degradation were determined by electron spin resonance (ESR) analysis and radical quenching experiments. Methods of UV–vis spectrum, three-dimensional fluorescence spectrum and liquid chromatography mass spectrometry (LC-MS) were used to analyze the CIP decomposition process. The prepared Cu-CeO 2 @CA composite films had certain stability in the four cycles of application and the film catalyst was convenient for recycling. The toxicity evaluation results indicated the decline of the solution toxicity after treating in the Cu-CeO 2 @CA/DBD system.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Qi Zhang,Qian Ma,Xueying Wang,Yi Wang,Dongheng Zhao
In the present work, a series of CeO 2 /WO 2.9 composites with a tunable structure and thickness are originally fabricated by innovating different additional quantities of H 2 WO 4 during the hydrothermal process. Optimal Ce/W-0.25 sensors have a higher response value of 23.68 to 100 ppm n -butanol at room temperature than that of pure CeO 2 (1.26) at 200 ℃. The unique surface double oxygen defect engineering between CeO 2 and WO 2.9 has a remarkable role in enhanced gas sensing, formation of the CeO 2 -WO 2.9 heterojunction, and effective surface/interface transport mechanism. The electron transfer between WO 2.9 and CeO 2 driven by oxygen defects on the surface of CeO 2 can easily facilitate the interconversion between Ce 3+ and Ce 4+ . This work provides a new insight and the facile fabrication pathway for constructing double oxygen defects-derived CeO 2 -based heterostructures for developing novel n -butanol gas sensors with excellent sensing performance at room temperature.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Longwen Chen,Feng Liu,Xiaoqian Li,Qiuzhen Tao,Zhaoqin Huang,Qi Zuo,Yanwu Chen,Tan Li,Mingli Fu,Daiqi Ye
Metal oxide-oxide interface on supported catalyst has been rarely studied due to the complex interfacial structure and synthetic challenge. Herein, different Ag-supported CeO 2 /Co 3 O 4 samples with various covered-state of CeO 2 were prepared for catalytic soot oxidation. In comparison, catalytic activity was significantly improved by grafting CeO 2 on Co 3 O 4 , in which the best performing Ag/CoCe-2 exhibited remarkable catalytic performance towards soot oxidation with a T 50 of 290.5 ℃ under 10 % O 2 /N 2 . Catalyst characterization investigated by Scanning Electron Microscope (SEM), quasi in-situ X-ray Photoelectron Spectroscopy (XPS), in-situ Raman, etc. revealed that this outstanding promotion in catalytic activity can be principally ascribed to the formation of the CeO 2 /Co 3 O 4 interface. An appropriate CeO 2 dosage maximized the contact and interaction between Co 3 O 4 and CeO 2 , resulting in the largest CeO 2 /Co 3 O 4 interface featured with abundant generated superoxide species and activated surface lattice oxygen. Density functional theory (DFT) calculations were also carried out for the oxygen vacancy formation energy, Gibbs free energy, etc. In presence of the CeO 2 /Co 3 O 4 interface, a charge density redistribution around the adsorbed reactants at oxygen vacancies could be formed, owing to the efficient charge transfer enhanced by the electron-appealing effect. The change in electronic structure favored reducing the oxygen vacancy formation energy and boosting the lattice oxygen activation induced by the hybridized Co-O-Ce bonds, finally lowering the adsorption and activation barriers for reactive species and accelerating the reaction kinetics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Kangning Wang,Mengran Qin,Chuantao Wang,Ting Yan,Yanzhong Zhen,Xiaolei Sun,Jianwei Wang,Feng Fu
The construction of composite materials is an effective strategy to solve the problems of poor conductivity, manganese dissolution, and volume expansion of manganese-based materials. Herein, a CeO 2 /MnO x @C hollow composite cathode derived from the self-assembly of Ce-Mn-metal-organic frameworks (Ce-Mn-MOFs) was synthesized. The abundant oxygen vacancies and good electronic/ionic conductivity of CeO 2 improve the electrical conductivity of composite, enhancing the rate performance. The unique hollow structure could inhibit manganese dissolution and alleviate volume expansion. The results indicate that the 1 % CeO 2 /MnO x @C composite cathode possesses a high reversible capacity and excellent cycling stability. Specifically, the 1 % CeO 2 /MnO x @C composite cathode shows a remarkable reversible specific capacity of 130 mAh/g at a current density of 500 mA g −1 , 6.5 times more than the pure MnO x (20 mAh/g). The capacity retention is up to 99.5 % relative to the initial capacity after 800 cycles. This study provides a new strategy for designing rare-earth composite electrodes to improve electrochemical performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 34
·21851-21858
·
IF 4.036
Nan Zhao,Lu Ren,Guangyi Du,Jing Liu,Xueqiu You
The rGO/CeO2/FTO nanocomposite modified electrode was prepared by an electrochemical method. A simple and highly sensitive electrochemical sensing platform for electrochemical rGO and modified CeO2 nanoribbons directly on FTO electrodes was developed. Simultaneous determination of Pb2+ and Cd2+ used the differential pulse anodic stripping voltammetry (DPASV) method. The method was simple to operate, and CeO2 nanobelts could be obtained simultaneously by electrodeposition and reduction of GO without further processing. This is an environmentally friendly electrochemical method to obtain modified electrodes under mild conditions. The experimental results showed that the linear calibration curves of Pb2+ and Cd2+ are 1–300 and 0.2–500 μg L−1, respectively. At the same time, no interference from other coexisting metal ions was found during the detection process, which proved that the modified electrode had good stability and repeatability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Ren Yuqi,Fu Yiwei,Li Naixu,You Changjun,Huang Jie,Huang Kai,Sun Zhenkun,Zhou Jiancheng,Si Yitao,Zhu Yuanhao,Chen Wenshuai,Duan Lunbo,Liu Maochang
H 2 O dissociation plays a crucial role in solar-driven catalytic CO 2 methanation, demanding high temperature even for solar-to-chemical conversion efficiencies <1% with modest product selectivity. Herein, we report an oxygen-vacancy (V o ) rich CeO 2 catalyst with single-atom Ni anchored around its surface V o sites by replacing Ce atoms to promote H 2 O dissociation and achieve effective photothermal CO 2 reduction under concentrated light irradiation. The high photon flux reduces the apparent activation energy for CH 4 production and prevents V o from depletion. The defects coordinated with single-atom Ni, significantly promote the capture of charges and local phonons at the Ni d -impurity orbitals, thereby inducing more effective H 2 O activation. The catalyst presents a CH 4 yield of 192.75 µmol/cm 2 /h, with a solar-to-chemical efficiency of 1.14% and a selectivity ~100%. The mechanistic insights uncovered in this study should help further the development of H 2 O-activating catalysts for CO 2 reduction and thereby expedite the practical utilization of solar-to-chemical technologies.
研究领域:
催化
·
太阳能
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2024
·Vol. 22
·期 1
·1-11
·
IF 10.6
Liu Jie,Liu Chengxiang,Tang Jinghua,Chen Qiao,Yu Yan,Dong Yan,Hao Jie,Wu Wei
Radiotherapy (RT) is one of the important treatment modalities for non-small cell lung cancer (NSCLC). However, the maximum radiation dose that NSCLC patient can receive varies little. Therefore, the exploitation of novel RT sensitization approaches is a critical need for the clinical treatment. RT resistance in NSCLC is linked to tumor microenvironment (TME) hypoxia, cell cycle arrest and associated genetic alterations. Here, we designed a novel method for targeted delivery of quercetin (QT) and CeO2 to enhance RT sensitivity. We loaded QT into CeO2@ZIF-8-HA nanoparticles to prevent its degradation in the circulatory system and successfully delivered QT and CeO2 targeted to NSCLC tumors. Under the protection and targeted delivery of Zeolitic Imidazolate Framework-8 (ZIF-8), the nanocomplexes exhibited excellent catalytic mimetic activity in decomposing H2O2 into O2, thus significantly reversing the hypoxia of TME, while the radiosensitizer QT caused DNA damage directly after RT. In a subcutaneous tumor model, CeO2@ZIF-8-HA overcame radiation resistance and enhanced therapeutic efficacy. This multiple sensitization strategy combining delivery of QT and CeO2@ZIF-8-HA nanozymes opens a promising approach for RT of NSCLC.
研究领域:
肿瘤学
·
纳米技术
·
放射肿瘤学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 6
·120289
·
IF 7.2
Tiantian Zhang,Weilu Sun,Jiazhuang Chen,Jianxin Chen,Yinhui Li
The misuse of tetracycline (TC) harms ecosystems and human health. CeO 2 , with its stable structure and abundant oxygen vacancies (OVs), is a focus for TC photocatalytic degradation but suffers from high carrier recombination, poor visible light absorption, and nanoparticle agglomeration. In this study, to overcome the drawbacks of CeO 2 mentioned above, PVP-modified SrTiO 3 (STO) was used as the support, PVP efficiently captures the precursor Ce 3 + by taking advantage of its network structure. And a layer of ultrafine nanoparticles CeO 2 was uniformly loaded on its surface by hydrothermal synthesis to form a core-shell structure composite material CeO 2 @STO, effectively solving the problem of CeO 2 nanoparticle agglomeration. A large specific surface area and sufficient active sites have been obtained, which enables CeO 2 to fully exert its catalytic degradation ability. The TC removal rate of the composite material CeO 2 @STO-2 was 80.50 %, which was 1.5 times and 2.5 times that of CeO 2 and STO respectively, and still maintained a high TC removal rate after 5 cycles, with only a decrease of 10.03 %. Furthermore, for tetracycline antibiotics such as chloramphenicol (CTC) and oxytetracycline (OTC), the removal rates were as high as 85.60 % and 78.60 %, which were significantly higher than those of CeO 2 and STO. The enhanced catalytic performance is attributed to the broadened visible-light absorption of composites, a Z-scheme heterostructure that suppresses carrier recombination, and interfacial doping that enriches oxygen vacancies. Toxicity simulations and bean sprout experiments confirmed significantly reduced toxicity after degradation. This work provides a novel strategy for developing high-performance OV-rich core-shell photocatalysts.
研究领域:
材料科学
·
环境催化
·
光催化
·
纳米材料
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·
IF 3.7
Zhixian Wang,Yuntao Hu,Zhigang Zhang,Bin Wang,Gengxiu Zheng,Huaiqing Zhao
The development of synthetic methods for N-heterocyclic compounds have garnered considerable attention due to their significance in diverse chemical processes. Among various synthesis methods, the direct oxidative dehydrogenation of saturated substances to N-heteroaromatics is a simple and efficient method. This study utilized the pyrolysis of Mn/Ce-BTC MOFs precursor to prepare MnO X -CeO 2 composites as a heterogeneous catalyst for the aerobic oxidative dehydrogenation of N-heterocycles. The MnO X -CeO 2 composites were analyzed with various characterization techniques including XRD, SEM, TEM, BET, XPS, ICP-OES and Raman spectroscopy. The detailed findings from experiments indicate that the catalytic activity of the composites has been significantly improved due to the synergistic effect of MnO X -CeO 2 and the abundant oxygen vacancies on the surface of the catalyst. And the related mechanism experiments reveal that reactive oxygen species (ROS) are involved in this catalytic system. Furthermore, MnO X -CeO 2 composites retain excellent catalytic performance even after ten recycles. Graphical The synthesized bimetallic oxides MnO X -CeO 2 by the pyrolysis of Mn/Ce-BTC MOFs have been employed as a heterogenous catalyst for the oxidative dehydrogenation of N-heterocycles to N-heteroaromatics with oxygen as the solo oxidant.
研究领域:
催化化学
·
材料化学
·
有机合成
·
无机化学
·
环境化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Shanshan Shao,Xin Li,Xiaohua Li,Shiliang Wu
Developing efficient solid acid catalysts for converting biomass-derived carbonyls into high-energy-density aviation fuels remains challenging due to insufficient activity and stability. This work systematically investigates the mechanistic roles of Lewis and Brønsted acid sites in CeO2-based catalysts during the aldol condensation of cyclopentanone, revealing that Brønsted acid sites dominate self-condensation pathways, while Lewis acid sites govern cross-dimerization reactions. To optimize the strength and stability of the acid catalyst, a ZrO2–CeO2 composite (Ce–Zr–O) was developed via controlled metal oxide doping (33 wt % ZrO2), which achieves enhanced acid site distribution and synergy. When Ce–Zr–O-33 was supported on biomass-derived porous carbon (PC), the resulting Ce–Zr–O-33/PC catalyst demonstrated exceptional recyclability, with the target product yield increasing by 4.28% over five consecutive cycles. Further integration of bimetallic Ni–Cu (10 wt %) synergistically balanced condensation and hydrogenation functions, boosting the selectivity of alkanes to 73.68%. The optimized Ni–Cu (10)/Ce–Zr–O-33/PC catalytic system exhibits a dual-regulation mechanism: ZrO2 doping modulates the acid site density and strength, while Ni–Cu nanoparticles promote selective hydrogenation and stabilize intermediates. This work provides a scalable solid acid catalyst design framework for industrial biomass-to-fuel conversion, bridging the gap between mechanistic understanding and practical application in sustainable aviation fuel synthesis.
研究领域:
催化化学
·
可再生能源
·
可持续化学
·
材料科学
·
生物质转化
·
多相催化
·
燃料合成
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Fengping Zhou,Ye Xiao,Meina Guo,Yetao Tang,Weihua Zhang,Rongliang Qiu
The increasing demand for rare earth elements (REEs) motivates the development of novel strategies for cost-effective REE recovery from secondary sources, especially rare earth tailings. The biggest challenges in recovering REEs from ion-adsorption rare earth tailings are incomplete extraction of cerium (Ce) and the coleaching of iron (Fe) and manganese (Mn). Here, a synergistic process between reduction and stabilization was proposed by innovatively using elemental sulfur (S) as reductant for converting insoluble CeO2 into soluble Ce2(SO4)3 and transforming Fe and Mn oxides into inert FeFe2O4 and MnFe2O4 spinel minerals. After the calcination at 400 °C, 97.0% of Ce can be dissolved using a diluted sulfuric acid, along with only 3.67% of Fe and 23.3% of Mn leached out. Thermodynamic analysis reveals that CeO2 was indirectly reduced by the intermediates MnSO4 and FeS in the system. Density functional theory calculations indicated that Fe(II) and Mn(II) shared similar outer electron arrangements and coordination environments, favoring Mn(II) over Ce(III) as a replacement for Fe(II) in the FeO6 octahedral structure of FeFe2O4. Further investigation on the leaching process suggested that 0.5 mol L–1 H2SO4 is sufficient for the recovery of REEs (97.0%). This research provides a promising strategy to selectively recover REEs from mining tailings or secondary sources via controlling the mineral phase transformation.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ChemSusChem
·
2026
·Vol. 19
·期 3
·e202502450
·
IF 5.9
Mengmeng Jin,Yaolei Zhao,Weiting Li,Tiantian Xu,Jiazuo Wei,Jingjun Liu
2,5-Bis(hydroxymethyl)furan (BHMF) is a promising intermediate for the synthesis of pharmaceuticals and crown ethers, whereas achieving a high reaction rate in the hydrogenation of 5-hydroxymethylfurfural (5-HMF) to form BHMF remains challenge. In this work, a series of Cu/CeO 2 –x catalysts ( x denotes H, Air, Ar) were synthesized by calcination under different atmospheres (10% H 2 /Ar, Air, Ar) and evaluated for the 5-HMF hydrogenation to BHMF. Cu/CeO 2 –Ar exhibited a superior reaction rate of 26.8 mmol·g cat −1 ·h −1 and BHMF yield of 99.1% under the condition (180°C, 5 h, 1 MPa H 2 ), significantly outperforming Cu/CeO 2 –H and Cu/CeO 2 –Air. The characterizations reveal that the calcination in the oxygen-deficient argon atmosphere led to high Cu dispersion and minimized Cu particle size in the Cu/CeO 2 –Ar. These properties resulted in the abundant Cu + –O V –Ce 3+ sites and increased Cu 0 number. In situ Fourier transform infrared spectroscopy analysis elucidates the distinct roles of these active sites. Cu + sites are responsible for perpendicular adsorption of the 5-HMF carbonyl group, and Cu 0 sites drive efficient H 2 dissociation. In contrast, the O V –Ce 3+ sites do not adsorb 5-HMF and H 2 . The close synergy between numerous Cu 0 sites and abundant Cu + sites in the Cu/CeO 2 –Ar accelerates the process of 5-HMF hydrogenation to BHMF. Graphical The oxygen-deficient argon atmosphere led to high dispersion and small particle size of Cu in Cu/CeO 2 –Ar. These properties resulted in the abundant Cu + sites for the adsorption of CO from 5-HMF and the numerous Cu 0 sites to efficiently dissociate H 2 , synergistically boosting catalytic reaction rate to 26.8 mmol·g cat -1 ·h -1 .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）