Polymers
·
2019
·Vol. 11
·期 3
·458
·
IF 3.164
Wei Wang,Baikai Zhang,Shuai Jiang,Huiyu Bai,Shengwen Zhang
The major challenge in preparing polymer nanocomposites is to prevent the agglomeration of inorganic nanoparticles (NPs). Here, with regenerated cellulose (RC) films as supporting medium, UV-shielding and transparent nanocomposite films with hydrophobicity were fabricated by in situ synthesis of CeO2NPs. Facilitated through the interaction between organic and inorganic components revealed by X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR) characterization, it was found that CeO2NPs were uniformly dispersed in and immobilized by a cellulose matrix. However some agglomeration of CeO2NPs occurred at higher precursor concentrations. These results suggest that the morphology and particle size of CeO2and the corresponding performance of the resulting films are affected by the porous RC films and the concentrations of Ce(NO3)3·6H2O solutions. The optimized nanocomposite film containing 2.95 wt% CeO2NPs had more than 75% light transmittance (550 nm), high UV shielding properties, and a certain hydrophobicity.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Meinan Yang,Nan Wang,Xu Wang,Ruiyong Zhang,Ini-lbehe Nabuk Etim,Mei-E. Yue,Jizhou Duan,Baorong Hou,Wolfgang Sand
Oxygen vacancies can provide active sites for catalysts, promoting catalytic activity. However, there are fewer nanozyme catalysts with oxygen vacancies. In this study, CeO 2 metal–organic framework (CeO 2 -MOF) nanorods with oxygen vacancies are synthesized through a simple hydrothermal and calcination processes. The obtained CeO 2 -MOFs exhibit excellent nanozyme catalytic activity for antibacterial applications. The CeO 2 -MOF nanorods demonstrate intrinsic haloperoxidase-like activity by catalyzing the bromination of organic signaling compounds, outperforming the catalytic properties of pure CeO 2 . The activity of CeO 2 -MOF (6) is the best because of its large specific surface area of 103.638 m 2 /g, surpassing that of CeO 2 at 74.752 m 2 /g. The oxygen vacancies are crucial in regulating the electronic structure of CeO 2 -MOFs, thereby improving the catalytic performance. The experiments of multiple substrates show that CeO 2 -MOF (6) exhibits good stability and recyclability. Additionally, CeO 2 -MOF (6) can catalyze the oxidation of Br - with H 2 O 2 to the corresponding hypobromous acid (HBrO), which exhibits strong antibacterial activity against typical marine bacteria ( Pseudomonas aeruginosa ). This study expands the range of biomimetic enzyme materials. It provides an efficient and green perspective and strategy for developing antibacterial and antifouling biomimetic catalysts, which offers a sustainable alternative for industrial applications in marine coatings and environmental protection.
研究领域:
材料科学
·
生物学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Dan Su,Yuhan Liu,Jiangfan Chang,Ying Yang,Xiaoyan He,Xiuqin Bai
Biofouling, the accumulation of organisms on submerged surfaces, significantly impairs vessel performance and hinders maritime industry development. The development of effective coatings has become an efficient solution to this problem. Cerium oxide nanoparticles (CeO2NPs) were synthesized on dopamine-modified 5083 aluminum alloy (Al) surfaces by mussel-inspired chemistry. The CeO2NPs can be fully exposed to the coating surface using this method, and CeO2 nanocoating exhibited haloperoxidase-like activity. CeO2 nanocoatings have an excellent ability to inhibit the attachment of P. tricornutum, E. coli, and Bacillussp., and their numbers were reduced by 96.03%, 94.41%, and 88.44%, respectively. The outstanding antiadhesion capability of the coating was attributed to its potent antibacterial properties and quorum quenching effect. Furthermore, the CeO2 nanocoating demonstrated outstanding corrosion resistance, with an impedance modulus 46.9 times higher than that of the Al sample. This approach presents a sustainable and environmentally friendly surface modification model for enhancing the performance of antifouling and anticorrosion in aluminum materials.
研究领域:
材料科学
·
生物学
·
海洋科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Zhihao Jin,Yajing Shen,Xiaowei Da,Xianfu Chen,Minghui Qiu,Yiqun Fan
CeO 2 is an alternative membrane material for precise separation under harsh conditions because of its single fluorite structure and outstanding high-temperature stability. In this study, uniform and stable CeO 2 colloidal sols were successfully prepared using an ultrasound-assisted precipitation method with an average particle size of approximately 5 nm. To prepare crack-free CeO 2 membranes with a controllable thickness, concentration of polyvinyl alcohol in the colloidal sol and the coating time were investigated. An integrated membrane layer was fabricated by adjusting the sol to PVA solution mass ratio to 1:1 with a coating time of 30 s. After calcination at 500 °C, a thin CeO 2 membrane (approximately 200 nm thick) was obtained. In addition, the CeO 2 material derived from the as-prepared sol showed a fluorite structure and lattice fringes corresponding to different crystal planes, indicating the formation of a pure CeO 2 thin membrane. The CeO 2 membrane exhibited a high performance, with a molecular weight cut-off of 3.9 kDa and a high water permeance of 100 L m −2 h −1 ·bar −1 . It showed excellent thermal stability, promising good potential applicability at high temperatures. Additionally, it exhibited the dye rejection rates of >99% for Direct Red 80 and 95.5% for Congo Red, and salt rejection rates of <1% at 60 °C in the simulated dye wastewater treatment . Overall, this study presents a new tight ultrafiltration membrane material that has good potential for high-temperature dye wastewater treatment.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 35
·期 11
·115602
·
IF 3.5
Nan Li,Lanlan Huo,Qian Dong,Bin Zhu,Liangqi Huang,Jiangquan Ma
Constructing heterojunction to adjust the electronic structure of catalysts is a promising strategy for synergistically improving electrocatalytic activity. In addition, RuSe2 is recognized as an effective alternative to Pt for boosting alkaline hydrogen evolution reaction (HER) on account of its outstanding catalytic properties. Herein, novel RuSe2/CeO2 heterojunction electrocatalysts are fabricated through hydrothermal and thermal treatment methods. The optimal 50% RuSe2/CeO2 heterojunction electrocatalyst exhibits a low HER overpotential of 16 mV to attain 10 mA cm−2 current density and Tafel slope of 66.1 mV dec−1 for hydrogen evolution in 1.0 M KOH. At the same time, the 50% RuSe2/CeO2 heterojunction electrocatalyst also maintains a stable HER activity for 50 h or 3000 CV cycles. The experimental results show that formation of heterogeneous interface between RuSe2 and CeO2 results in the redistribution of electrons at the RuSe2/CeO2 interface, thereby changing the electronic structure of RuSe2 and enhancing the performance of the RuSe2/CeO2 electrocatalyst. This work may provide a feasible way to design efficient hydrogen evolution heterojunction electrocatalysts by modulating the electronic structure in alkaline electrolytes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2022
·
IF 0.836
Ran Wang,Qi Li,Juanjuan Yin,Zhiwei Liu,Lili Gao,Tifeng Jiao
Cubic fluorite CeO2 has band gap energy similar to that of TiO2, exhibiting a certain photocatalytic activity, and it can be widely used to adsorb and degrade various organic dyes. Herein, self-assembled MXene-CeO2 composites with CeO2 nanoparticles uniformly loaded on the surface and between the layers of MXene was prepared by the hydrothermal method. Through the microstructure analysis of MXene-CeO2 composites, it was proved that the MXene could not only effectively prevented the accumulation of CeO2 nanoparticles during the production process but also provided a large attachment site for the generation of nanoparticles. In addition, the self-assembled MXene-CeO2 exhibited good adsorption efficiency for adsorption of the cationic dyes rhodamine B (RhB) and methylene blue (MB) under ultraviolet light irradiation. Therefore, the prepared MXene-CeO2 composite nanomaterial has significantly higher performance in degrading dyes and can be widely used in wastewater treatment.
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 5
·2343-2352
·
IF 3.049
Feng Zhao,Shuangde Li,Xiaofeng Wu,Renliang Yue,Weiman Li,Yunfa Chen
CuO–CeO2 nanocatalysts with different amounts of Mn dopping (Mn/Cu molar ratios of 0.5 : 5, 1 : 5 and 1.5 : 5) were synthesized by flame spray pyrolysis (FSP) method and tested in the catalytic oxidation of CO. The physicochemical properties of the synthesised samples were characterized systematically, including using X-ray diffraction (XRD), Raman spectroscopy, field-emission scanning electron microscopy (FESEM), Brunauer–Emmett–Teller (BET), X-ray photoelectron spectroscopy (XPS), oxygen-temperature programmed desorption (O2-TPD), hydrogen-temperature programmed reduction (H2-TPR) and in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS). The results showed that the 1Mn–Cu–Ce sample (Mn/Cu molar ratio of 1 : 5) exhibited superior catalytic activity for CO oxidation, with the temperature of 90% CO oxidation at 131 °C at a high space velocity (SV = 60 000 mL g−1 h−1), which was 56 °C lower than that of the Cu–Ce sample. In addition, the 1Mn–Cu–Ce sample displays excellent stability with prolonged time on CO stream and the resistance to water vapor. The significantly enhanced activity was correlated with strong synergetic effect, leading to fine textual properties, abundant chemically adsorbed oxygen and high lattice oxygen mobility, which further induced more Cu+ species and less formation of carbon intermediates during the CO oxidation process detected by in situ DRIFTS analysis. This work will provide in-depth understanding of the synergetic effect on CO oxidation performances over Mn doped CuO–CeO2 composite catalysts through FSP method.
研究领域:
催化化学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Riyang Shu,Long Xie,Bin Hu,Zhipeng Tian,Chao Wang,Ying Chen,Ying Xu
Methanol steam reforming for hydrogen production is a highly promising energy technology, due to the high hydrogen intensity of methanol and the appendant hydrogen capture from water. In order to reinforce the hydrogen yield in methanol steam reforming reaction, a series of Ru-based carbon-coated CeO 2 catalysts were prepared in this work, using glucose, cellulose and activated carbon as different carbon sources via a hydrothermal method. The results showed that the Ru/C G -CeO 2 (glucose) catalyst exhibited a superior catalytic performance at the reaction temperature of 400 °C, with a higher hydrogen production rate (0.276 mol/h) than Ru/C C -CeO 2 (cellulose, 0.230 mol/h) and Ru/C A -CeO 2 (activated carbon, 0.253 mol/h) catalysts. This was attributed to the synergistic effect between CeO 2 and carbon, where the carbon layer formed by glucose enhanced the interaction between the active component and the CeO 2 support, which also facilitated the electron transfer effects and resulted in a large amount of oxygen vacancies for Ru/C G -CeO 2 . This led to a strong adsorption capacity for CO and oxygen-containing species derived from the substrate, thereby improving hydrogen production. Additionally, the catalyst stability and the resistance to carbon deposition were evaluated for all the three catalysts, and Ru/C G -CeO 2 catalyst also demonstrated a superior stability and anti-carbon deposition capability.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 52
·2407802
·
IF 13
Mengyang Li,Yuhang Dong,Yage Shang,Jiaqi Liu,Yunchuan Wang,Dongliang Zhang,Lixia Zhang,Chao Han,Yue Zhang,Kuo Shen,Yaoxiang Yang,Hongtao Wang,Hao Guan,Dahai Hu
Excessive generation of reactive oxygen species (ROS) poses a huge obstacle to the healing process of diabetic wounds, resulting in chronic, non-healing wounds. While numerous anti-ROS therapeutics have been developed, satisfied intra- and extra- cellular ROS homeostasis is hard to be established in diabetic wounds. To address this issue, a nanoparticle via loading metformin and CeO 2 into mesoporous silica (MSN@Met-CeO 2 ) is designed and synthesized, which is then encapsulated within ROS-responsive hydrogel and shaped as microneedles (MNs) for better application in diabetic wounds. Interestingly, a unique metformin-cerium chelate (Ce· 3Metformin) is formed during the synthesis of MSN@Met-CeO 2 MN, which significantly strengthened the inhibitory effect of metformin on mitochondrial complex I. With the presence of Ce· 3Metformin, MSN@Met-CeO 2 MN performed a remarkable effect on intracellular mtROS reduction as well as extracellular ROS elimination, the latter is primarily accomplished through the dissociative CeO 2 in MSN@Met-CeO 2 MN. In the mouse diabetic wound model, MSN@Met-CeO 2 MN exhibited a superior pro-healing effect with accelerated inflammation resolution and enhanced angiogenesis, thus highlighting its significant potential for clinical application
研究领域:
医学
·
生物材料学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Zeyu Jiang,Shengying Zhao,Yuhao Yang,Minghui Tan,Guohui Yang,Yisheng Tan
As one of the most important green chemicals, dimethyl carbonate (DMC) has wide application prospects in electrochemistry, fuel additive, solvent and building block in organic synthesis. The effective utilization of CO 2 to synthesize DMC has been proved to be highly advantageous. In this study, a series of Ce-BTC MOF-derived nanorod CeO 2 catalysts for the direct synthesis of DMC from CO 2 and methanol were prepared via complexation reaction at room temperature and then thermal decomposition under different atmospheres. The calcination atmosphere had great influence on the structure and catalytic properties of obtained CeO 2 catalysts. The CeO 2 derived from calcination of Ce-BTC at 500 °C under H 2 atmosphere exhibited higher specific surface area, oxygen vacancy concentration and CO 2 adsorption capacity. And thus, its DMC yield was up to 6.332 mmol/g CeO2 within 4 h, much higher than that of commercial nano CeO 2 and other as-prepared catalysts in absence of dehydrating agents.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Hongrui Zhu,Xumei Fu,Zhiqiang Zhou
Two-dimensional (2D) nanomaterials benefit from the high specific surface area, unique surface properties, and quantum size effects, which have attracted widespread scientific attention. MXenes add many members to the 2D material family, mainly metal conductors, most of which are dielectrics, semiconductors, or semimetals. With excellent electron mobility, beneficial to electron–hole separation, and large functional groups that can be tightly coupled with other materials, MXenes have broad application prospects in photocatalysis. Meanwhile, the application of CeO2-based materials in organic catalysis, photocatalytic water splitting, and photodegradation of organic pollutants has been extensively explored, and studies have found that CeO2-based materials show good photocatalytic performance. In view of this, we synthesized regular octahedral CeO2 with a homojunction in one step by a hydrothermal method and compounded it with ultrathin 2D material MXene, which exhibited fast carrier migration efficiency and a good interfacial effect, making the material show excellent photocatalytic activity. The results showed that the photocatalytic H2 evolution performance of the MXene/CeO2 heterojunction was significantly improved. In this study, a low-cost catalyst with high photocatalytic activity was prepared, presenting a new research idea for achieving a combined 3D/2D photocatalytic system.
研究领域:
材料科学
·
纳米技术
·
光催化
·
能源材料
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2016
·Vol. 35
·期 5
·651-658
·
IF 1.872
Hao Tian,Xinyu Li,Sai Chen,Liang Zeng,Jinlong Gong
Reducible oxides ( e.g ., CeO 2 and ZrO 2 ) supported 3d transition metals ( e.g ., Ni, Co, Pt) exhibit remarkable catalytic activity in reactions that involve water activation, such as steam reforming and water gas shift. This paper describes the influence of Sn addition on the performance of Ni/CeO 2 catalysts in ethanol steam reforming. 0.25 wt% Sn addition improved the stability of Ni/CeO 2 by forming Ni-Sn bimetallic nanoparticles with Sn enriched surfaces to suppress the carbon deposition. Ni 0. 25 Sn/CeO 2 kept over 90% ethanol conversion in a 20 h stability test at 600 °C with over 60% hydrogen selectivity under a gas hourly space velocity of 57000 mL/(g•h). However, the presence of Sn decreased the overall oxygen storage capacity and oxygen mobility of NiSn/CeO 2 , which hampered water activation process and coke elimination occurring at the interface between Ni and CeO 2 . Additionally, ethanol decomposition was also suppressed due to the coverage of Sn atoms on Ni surfaces.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）