APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Shengjun Yi,Pincai Lai,Guilin Ma,Jinjian Pan,Zhen Chen,Yuanhang Qin,Xingmao Jiang
Nanocatalysis plays an important role in chemical industrial production, environmental protection and etc. However, traditional catalyst preparation methods are generally labor-intensive, time-consuming and need high-temperature calcination, which are not conducive to the preparation of nanostructured catalyst. Therefore, developing a green and facile method for nano-sized catalyst preparation is very significative. In this work, a series of nano-sized Co 3 O 4 /CeO 2 catalysts with high specific surface area, high oxygen storage and homogeneous distribution of active species were synthesized via a glucose-urea (G-U method), and applied in NO oxidation The NO oxidation performance indicates that the 12.5% CoCe G−U catalyst prepared by the G-U method shows higher activity than those of catalysts prepared by the traditional methods (precipitation, hydrothermal and impregnation methods). The characterization results revealed that the CoCe G−U catalysts have the highest specific surface area, pore volume, content of surface Ce 3+ and Co 3+ among the catalysts. Moreover, the nano Co 3 O 4 is better dispersed on CeO 2 , which resulted in more active oxygen species on the surface of the catalysts prepared by the G-U method. Herein, the higher specific surface area, the smaller Co 3 O 4 nanoparticles, the more active oxygen species and the higher Ce 3+ and Co 3+ contents of the CoCe G−U catalyst lead to the more excellent NO oxidation performance. This work provides a green and efficient approach for the industrial production of nano-sized oxide catalysts.
研究领域:
环境科学
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材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Shengnan Zhang,Hongxian Zhou,Xin Liu,Yantong Wu,Shuran Yang,Jia Yin,Mohammad H. Shubair,Mingzhu Zhang
Periodontitis, a chronic inflammatory disease, leads to the progressive destruction of tooth-supporting tissues, and current treatments fall short of fully restoring periodontal regeneration. Dental pulp stem cells (DPSCs) have shown great promise for periodontal regeneration due to their ability to differentiate into multiple cell types and modulate immune responses. However, clinical use of DPSCs remains challenging due to poor cell retention, dependence on scaffolds, and high costs. Additionally, excessive reactive oxygen species (ROS) in the periodontal microenvironment hinder stem cell proliferation and differentiation, further limiting their regenerative potential. To address these challenges, we developed ultrafine cerium oxide nanoparticles (CeO2NPs) and engineered DPSCs (E-DPSCs) by incorporating these antioxidant nanozymes via endocytosis. The modified E-DPSCs exhibited enhanced proliferation, migration, and osteogenic differentiation under normal conditions. Crucially, under oxidative stress, E-DPSCs effectively neutralized ROS, reduced apoptosis, and maintained their osteogenic capacity. In vivo studies further demonstrated that E-DPSCs significantly enhanced periodontal regeneration compared to unmodified DPSCs. These findings highlight E-DPSCs as a promising solution to overcome current limitations in stem cell therapy, offering a more effective strategy for periodontal repair and regeneration.
研究领域:
牙科学
·
纳米医学
·
干细胞研究
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再生医学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yixin Jin,Yaning Fu,Shiyu Ma,Wen Wang,Youcai Lu,Qingchao Liu
Lithium–oxygen (Li–O2) batteries theoretically possess an exceptional energy density comparable to gasoline (up to 3500 W h kg–1), but in practical applications, the discharge products are difficult to effectively decompose, which leads to clogging of the cathode, resulting in severe polarization, limited actual capacity, and shortened battery life for Li–O2 batteries. Herein, we construct a highly active and stable catalyst with d-f electronic orbit coupling as a redox center by anchoring CeO2 onto CoO, simultaneously, oxygen vacancy (Ov) and CeO2 coactivated CoO. By leveraging the effects of interface engineering and defect engineering on the electronic structure of the catalyst, the adsorption energy for LiO2 can be adjusted to an ideal range. This not only avoids surface passivation caused by excessively strong binding energy but also overcomes the issue of sluggish Li2O2 decomposition efficiency due to excessively weak binding energy. Bracingly, the CeO2/CoO-based Li–O2 batteries exhibit an ultralow charge–discharge polarization, and Li2O2 was successfully induced to nucleate uniformly in nanoflower-like shapes, which could promote the reversible decomposition of the discharge products during the charging process and thereby enhance the electrochemical performance of Li–O2 batteries. Therefore, the CeO2@CoO/CC cathode exhibited an ultralow overpotential of 0.57 V and achieved a high discharge capacity of 19,850 mA h g–1. This work provides an important reference for designing the structure of cathode catalysts for Li–O2 batteries and regulating the growth paths and morphologies of discharge products.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 30
·期 3
·889-897
·
IF 2.523
Hu Lihua,Chen Li,Mo Xiaohong,Peng Xiong,Xu Wei,Liu Feng,Yan Zongcheng
For the effective utilization of carbon resources, a facile and recyclable heterogeneous catalyst system with high reactivity and stability is urgently needed for chemical fixation of CO 2 . Herein, a micro/nanostructured ZIF-8/CeO 2 composite was designed by direct surface-nucleated ZIF-8 nanoparticles on spindle-like CeO 2 . The ZIF-8 nanoparticles content of the ZIF-8/CeO 2 composite could be tuned by the changing of reaction parameters, such as the molar ratio of reactants and the reaction time. The ZIF-8/CeO 2 composite exhibits remarkably enhanced catalytic activity and superior reusability for cycloaddition reaction of CO 2 and epoxide than its pure substance. The enhanced performance of ZIF-8/CeO 2 composite should be attributed to its high specific surface area and abundant porosity, outstanding thermal stability, and the appearance of a new moderate acid/base site in composite material. Considering the convenient preparation, enhanced catalytic activity and excellent reusability of ZIF-8/CeO 2 composite, this work offers a new strategy to replace ZIFs-based porous catalysts for chemical fixation of CO 2 .
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2024
·
IF 7.2
Yucan He,Dongsen Mao,Qiangsheng Guo,Jun Yu
A series of highly ordered microporous Ce-based metal-organic frameworks (MOFs) were synthesized as the precursors for catalyst construction. The corresponding Ru catalysts were prepared by Ru impregnation on the derived CeO 2 by pyrolysis of Ce-MOF, and investigated for the CH 4 synthesis via CO 2 hydrogenation. Among the catalysts, Ru catalyst supported on the CeO 2 -B derived from Ce-BDC exhibited a highly competitive efficiency for CO 2 methanation, giving a CH 4 selectivity of 100% with a CO 2 conversion of 62% at 275 °C and 0.1 MPa, and the CH 4 productivity reached 0.49 mol/(mol Ru ·h). Characterization results revealed that more oxygen vacancies and corresponding surface oxygen species formed on the surface of CeO 2 -B derived from Ce-BDC caused to the stronger interaction between Ru and CeO 2 -B, which promoted the CO 2 adsorption and hydrogenation capacity of the catalyst, resulting in its better catalytic property. In situ diffuse reflectance infrared Fourier transform (DRIFT) studies further revealed that the route of HCOO* into CH 4 is a more competitive way of CO 2 hydrogenation to CH 4 .
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xukang Han,Yuanhang Zhang,Jinhu Hu,Jiao Liu,Mingliang Ma,Yuhao Feng,Xiyao Wang,Guoxu Sun,Wei Gao,Yonglei Chi,Zihan Guo
With the advancement of wireless communication and electronic equipment , microwave absorption materials (MAMs) have more and more broad applications in related fields. Ti 3 C 2 T x -MXene with unique two-dimensional structure and excellent dielectric properties is often used as a precursor of nano-TiO 2 , which is a potential MAMs. Carbon nanofibers , as a one-dimensional material, have great electrical conductivity and can form interconnected three-dimensional conductive networks. In this study, Ti 3 C 2 T x -MXene was prepared by in-situ HF etching method, and further combined with the benefits of Co, Ce metals, and carbon nanofibers. Co/CeO 2 /TiO 2 /CNFs were prepared via a facile technique for electromagnetic microwave (EM) absorption, exhibiting excellent EM absorption performance due to the synergistic effects of dielectric and magnetic properties . The minimum reflection loss (RL min ) and effective absorption bandwidth (EAB) reache −63.35 dB (11.2 GHz) and 3.6 GHz (9.5–13.1 GHz), with a thickness of only 2.35 mm and a filling rate of 30 wt%, while the maximum EAB reaches 5.4 GHz (12.4–17.8 GHz) with a thickness of 1.82 mm, covering nearly the entire Ku band. By offering a novel strategy to the creation of brand-new, high-performance MAMs based on 1D carbon nanofibers with dielectric/magnetic synergy, this work is believed to support the development of upcoming MAMs.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Xixi Chen,Shujuan Zhan,Dingsheng Chen,Chun He,Shuanghong Tian,Ya Xiong
Grey Fe doped CeO 2-σ with tunable surface and bulk oxygen vacancies (OVs) were facilely prepared by a hydrothermal method. The light absorption, charge transfer efficiency, and catalytic activity and mechanism closely depended on the OVs. By tailoring the surface and bulk OVs, the catalytic activity of grey ceria was boosted due to the enhanced production of reactive oxygen species (i.e. OH, surface O). Density functional theory calculations show that the OVs, especially the bulk OVs, modulate the electronic structure for narrowing the bandgap and accelerating the charge transfer. Meanwhile, the surface OVs more promote the adsorption of ozone and the bulk OVs more induces the dissociation of ozone into reactive surface O. The calculation results agree well with the experimental observations. This study provides a simple method for engineering the surface and bulk OVs of ceria and gains insight into their roles in photocatalytic ozonation .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yuxuan He,Yueming Zhu,Jin Qian,Peifang Wang,Yuhang Zhang,Kailin Xu,Bianhe Lu,Yin Liu,Junwei Shen
The composite catalysts with different morphologies (nanorods, nanocubes, nano-polyhedra and nanosphere) of ceria as loadings are prepared by using spinel as the carrier to investigate the crystal plane effect of ceria on the formation of oxygen vacancies in the catalyst and the activation efficiency of peroxymonosulfate (PMS). The results show that the CeO 2 nanocubic-based composite (CFOC-C) with more (1 0 0) crystal phase has superior catalytic performance in each individual condition, providing rapid activation of PMS and pollutant degradation. Through characterizations, the largest oxygen vacancy concentration is observed on the CFOC-C surface and the strongest reactive oxygen detection signal is obtained in the CFOC-C/PMS system. Moreover, the more active (1 0 0) crystal phase on the CeO 2 surface promotes the electron delocalization at Ce sites, accelerating the adsorption of PMS molecules and the cleavage of O-O bonds, subsequently generating more active species. With levofloxacin as the target, the main degradation intermediates and the degradation pathways in the CFOC-C/PMS system are analyzed in detail. The toxicity estimation results suggest that the toxicity of the degradation products decreases progressively with the reaction.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Hui Wang,Haiming Hu,Chunyong Zhou,Wangru Wei,Bing Fan,Haibo Wang,Shihua Dong
Corrosion of mild steel is everywhere and eco-friendly and efficient corrosion protection strategies deserve to be popularized. Superhydrophobic coatings are available for metal corrosion protection, but the limited-service life restricts their development. Here, we prepared environmentally friendly coatings with long-term corrosion resistant using a simple spray strategy. A two-layer superhydrophobic self-healable composite coating was prepared by spraying WFPU and fluoroCeNPs onto mild steel. The bottom WFPU prevents corrosion by corrosion inhibitor CeO 2 and repairs physical scratches by heating. The upper layer of fluoroCeNPs prevents the penetration of corrosive media by forming an air cushion at the solid-liquid interface. The combination of low surface energy and micro/nano hierarchical structure allows WFPU/fluoroCeNPs coating to exhibit superhydrophobicity and low adhesion, with a water contact angle of 157° and adhesion force 12.8 μN. In addition, WFPU/fluoroCeNPs coating exhibit excellent corrosion resistance, with an impedance modulus of 7.2 × 10 9 Ω cm 2 at low frequency (f = 0.01 Hz), which remains at 10 8 Ω cm 2 after 60 days in 3.5 wt% NaCl solution. After self-healing, the material can recover to its original state, both in terms of mechanical and corrosion protection properties. This new composite coating, which combines environmental protection, energy saving and remarkable effects, has a wide application value for the protection of metal against corrosion.
研究领域:
材料科学
·
腐蚀防护
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Zhichao Shang,Zhongxiang Yang,Yang Xiao,Xiaohong Wang
The various ordered mesoporous Ag/CeO 2 catalysts were successfully prepared using a facile silica-templated solution combustion synthesis method (TSCS). Utilizing X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), Brunauer-Emmett-Teller (BET), photoluminescence (PL) and UV–vis diffuse reflectance spectrometry (DRS), etc., the morphological, structural, crystalline, surface and optical properties of Ag/CeO 2 were investigated. It was found that the removal of the template (SiO 2 ) resulted in the formation of ultrafine mesoporous Ag/CeO 2 composites, and the specific surface area increased to 98.6 m 2 /g. The 15 % Ag/CeO 2 composite showed the best photocatalytic performance (97 % at 120 min), which was approximately 10 times higher as compared to the conventional SCS (Solution Combustion Synthesized) CeO 2 . In addition, a mechanism of the photocatalytic degradation of Rhodamine B (RhB) was proposed, where the reactive species ·O 2 − and h + played important roles in the degradation of pollutants.
研究领域:
材料科学
·
环境科学
·
催化
✓ 已验证
DOI
高影响因子
Electrocatalysis
·
2024
·Vol. 15
·期 4
·281-290
·
IF 2.7
Xiang Qun,Wang Yizhong,Wang Shuang,Fu Xucheng,Gao Guiqi,Yan Ruiwen
In this work, the CeO 2 nanoparticles were dispersed onto the surface of graphene oxide (GO), followed by electrodeposition of Pt–Pd alloy nanoparticles on the CeO 2 surface to fabricate Pt–Pd@CeO 2 /graphene oxide composites (Pt–Pd@CeO 2 /GO). Morphological investigation was conducted using X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The results of morphological characterization revealed that CeO 2 nanoparticles acted as cores, while Pt–Pd alloy nanoparticles formed shells. The electrocatalytic oxidation performance of Pt–Pd@CeO 2 /GO composites for methanol electro-oxidation reaction (MOR) was systematically investigated. The mass activity for MOR on Pt 1 Pd 1.3 @CeO 2 /GO electrocatalyst was 1128 mA·mg Pt+Pd −1 , which was 5.0-fold higher than that of Pt/C catalysts. The synergistic effect between Pt and Pd, along with the active oxygen-containing species of CeO 2 effectively enhanced catalytic activity. This work presents a novel approach to developing catalysts with high catalytic performance for MOR. Graphical Abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2022
·
IF 12.92
Anxiang Guan,Yueli Quan,Yangshen Chen,Zhengzheng Liu,Junbo Zhang,Miao Kan,Quan Zhang,Haoliang Huang,Linping Qian,Linjuan Zhang,Gengfeng Zheng
The electrocarboxylation reaction is an attractive means to convert CO 2 into valuable chemicals under ambient conditions, while it still suffers from low efficiency due to the high stability of CO 2 . In this work, we report a double activation strategy for simultaneously activating CO 2 and acetophenone by silver-doped CeO 2 (Ag-CeO 2 ) nanowires, featuring as an effective electrocatalyst for electrocarboxylation of acetophenone with CO 2 . Compared to the Ag foil, Ag nanoparticles and CeO 2 nanowires, the Ag-CeO 2 nanowire catalyst allowed to reduce the onset potential difference between CO 2 and acetophenone activation, thus enabling efficient electrocarboxylation to form 2-phenyllactic acid. The Faradaic efficiency for producing 2-phenyllactic acid reached 91% at −1.8 V versus Ag/AgI. This double activation strategy of activating both CO 2 and organic substrate molecules can benefit the catalyst design to improve activities and selectivities in upgrading CO 2 fixation for higher-value electrocarboxylation.
研究领域:
化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）