Journal of Energy Chemistry
·
2024
·
IF 14
Peiyun Zhou,Haokun Pan,Guangtong Hai,Xiang Liu,Xiubing Huang,Ge Wang
In this work, nickel foam supported CeO 2 -modified CoBDC (BDC stands for terephthalic acid linker) metal-organic frameworks (NF/CoBDC@CeO 2 ) are prepared by hydrothermal and subsequent impregnation methods, which can be further transformed to NF/CoOOH@CeO 2 by reconstruction during the electrocatalytic test. The obtained NF/CoOOH@CeO 2 exhibits excellent performance in electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) because the introduction of CeO 2 can optimize the electronic structure of the heterointerface and accelerate the accumulation of *OH. It requires only a potential of 1.290 V RHE to provide a current density of 50 mA cm −2 in 1.0 M KOH + 50 mM HMF, which is 222 mV lower than that required in 1.0 M KOH (1.512 V RHE ). In addition, density-functional theory calculation results demonstrate that CeO 2 biases the electrons to the CoOOH side at the heterointerface and promotes the adsorption of *OH and *HMF on the catalyst surface, which lower the reaction energy barrier and facilitate the electrocatalytic oxidation process.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Liang Li,Shao-zhong Hu,Ting Huang,Nan Zhang,Yong Wang
Constructing heterogeneous catalyst with different bandgaps is a prospect way to realize efficient charge transfer of catalytic redox reaction. Semiconductor-based catalyst as a prospective material can effectively solve sewage issues under light irradiation, but the efficiency is greatly influenced by the recombination rate of photoelectrons and holes. In this work, cerium dioxide (CeO 2 ) nanoparticles (NPs) were grown in-situ on carbon nanotubes (CNTs), which can maintain the pollutant removal efficiency of pure CeO 2 NPs and enhance the adsorption intensity under visible light for CeO 2 @CNTs composite. Furthermore, the introduction of cadmium selenide (CdSe) was conducive to establish built-in electronic field in the ternary CeO 2 @CNTs/CdSe catalyst, which effectively enhanced the catalytic activity of CeO 2 @CNTs/CdSe. In comparison to CNTs, CdSe, CeO 2 and CeO 2 @CNTs composite, the ternary CeO 2 @CNTs/CdSe catalyst exhibited higher photocurrent intensity, lower recombination of photoelectrons and holes (e - /h + ) pairs, indicating much better photocatalytic activity. CeO 2 @CNTs/CdSe as photocatalyst displayed excellent adsorption ability for Congo red (CR), which contributed to increase the transparency of reaction solution and improve the utilization rate to light, the evaluated degradation efficiency of CR achieved 83.58 % and the reduction ratio of Cr(VI) was nearly 100 %. This work confirms that CeO 2 @CNTs/CdSe composite with excellent adsorption and photocatalytic ability is a promising photocatalyst material in wastewater treatment.
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
·
2022
·
IF 16.744
Guiling Luo,Xiaowei Li,Linlin Chen,Yuning Zhang,Jun Gu,Yanhong Chao,Wenshuai Zhu,Zhichang Liu,Chunming Xu
Extracting lithium from salt lakes is an effective way to relieve the shortage of lithium resources. Electrochemical lithium extraction has attracted wide attention due to its high selectivity , eco-friendliness, and high-efficiency. Functional surface coating is an effective approach to improve the cycling performance, stability, and conductivity of the electroactive materials. In this work, LiMn 2 O 4 (LMO) electrode materials were prepared via sol–gel method with island-like CeO 2 coating (CeLMO) for lithium electrochemical adsorption from simulated brine. CeO 2 is helpful to inhibit the agglomeration of active metal oxides and promote the contact and electron transfer between metal oxides. Based on the results from X-ray diffraction, X-ray photoelectron, and Raman spectroscopy , the fate of lithium intercalation and deintercalation in CeLMO is illuminated. CeLMO-2//Ag electrochemical system can produce 96% pure Li + from Li 2 CO 3 precipitated mother liquor, and the adsorption capacity is 36.52 mg·g −1 . The capacity retention after 30 cycles was 60% at 50 mA·g −1 , and the Mn dissolution loss rate is 0.016%. In summary, island-like oxide coating improves electrochemical lithium adsorption efficiency and is a promising technology for producing battery-grade lithium products.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
F. Qi,Z. Wang,L. Yang,H. Li,G. Chen,S. Peng,S. Yang,C. Shuai
Antibacterial photodynamic therapy had attracted considerable attention in implant-associated infections treatment due to its high selectivity and no resistance. Actually, bacteria readily formed protective biofilm to cover themselves and impede the permeation of photosensitizers , severely impairing the therapeutic effect. Herein, a collaborative nanosystem was constructed by in-situ growing cerium oxide (CeO 2 ) nanoparticles on porphyrinic metal-organic framework PCN-224, and then mixed with poly- l -lactic acid (PLLA) powder to fabricate CeO 2 @PCN-224/PLLA scaffold. In the nanosystem, CeO 2 was expected to disrupt the biofilm integrity by releasing Ce 4+ , exposing bacteria. Subsequently, PCN-224 could grab this opportunity to kill the bacteria by generating reactive oxygen species (ROS) under light irradiation, thereby achieving the desired antibacterial effect. Crystal violet staining and agarose gel electrophoresis results demonstrated that the bacterial biofilm was effectively eliminated by cleaving the extracellular DNA chains. Coomassie brilliant blue and acridine orange staining revealed that the generated ROS effectively killed bacteria by destroying their cell membrane , causing DNA hydrolysis and protein leakage. Furthermore, ROS could also weaken the antioxidant capacity of bacteria by consuming their glutathione, further accelerating bacterial death. As a consequence, the scaffolds presented a robust antibacterial rate of 97% against S . aureus . Collectively, this work provides a promising strategy for efficient implant-related infection treatment.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
·
细菌学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Raji Govindan,Xu-Jia Hong,Palanivel Sathishkumar,Yue-Peng Cai,Feng Long Gu
Metal-organic framework (MOF)-derived hybrids are promising electrode materials in electrochemical energy storage , owing to their high surface area that offers enormous redox sites and excellent conductivity. In this work, MOF-derived cerium oxide/carbon integrated with molybdenum disulfide (CeO 2 /C/MoS 2 ) hybrid is developed as an electrode material for supercapacitor . Remarkably, integration of CeO 2 /C with small amount of MoS 2 has considerably enhanced the electrochemical performance. Moreover, CeO 2 /C/MoS 2 hybrid exhibited both surface and diffusion-controlled mechanism towards charge storage. The CeO 2 /C/MoS 2 hybrid showed an outstanding specific capacitance (specific capacity) of 1325.67 F g −1 (397.70 C g −1 ) and excellent cyclic stability with capacitance retention of 92.8% after 1000 charging-discharging cycles, which is significantly higher than that of CeO 2 /C (727.49 F g −1 ) or else that of MoS 2 (300.33 F g −1 ) at 1 A g −1 . In addition, asymmetric supercapacitor (ASC) fabricated with CeO 2 /C/MoS 2 hybrid and activated carbon (AC) showed remarkable electrochemical performance with high specific capacitance (110.55 F g −1 ), excellent cyclic stability (even after 1000 cycles) and high energy density of 34.55 Wh kg −1 at a power density of 666.7 W kg −1 . Thus, MOF derived CeO 2 /C integrated MoS 2 hybrid is a potential electrode material for the ASCs.
研究领域:
材料科学
·
电化学能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Muhammad Akbar,Gang Qu,Weiguang Yang,Jie Gao,Muhammad Yousaf,Naveed Mushtaq,Xunying Wang,Wenjing Dong,Baoyuan Wang,Chen Xia
Heterostructure electrolytes made of semiconductor and ionic conductor have drawn significant attention in solid oxide fuel cells (SOFCs) field owing to their attractive ionic conductivity at low operating temperatures. In this study, a new heterostructure is proposed by introducing a layered semiconductor NaCo 0.5 Fe 0.5 O 2 (NCF) into fluorite structure ionic oxide CeO 2 for SOFC electrolyte uses. The prepared samples are characterized in views of phase structure, surface and interface property, and electrical conductivity , followed by being applied in SOFCs for performance, impedance spectra and durability assessment. It is found the NCF-CeO 2 forms nanoscale heterostructure with massive hetero-interfaces and enriched oxygen vacancies . The best-performing sample 35NCF-65CeO 2 gains improved ionic conduction and promising SOFC performance with power density of 68–1010 mW cm -2 at 350–550 °C. Moreover, durability measurement verifies the NCF-CeO 2 based SOFC can be stably operated for 160 h under fixed current density of 100 mA cm -2 , whereas there is an obvious degradation in the initial 5 h. A particular attention is paid to investigate the dynamic electrochemical process and junction rectification effect of the NCF-CeO 2 cell to interpret the degradation behaviour. Our findings thus certify the great promise of layered and fluorite oxide based NCF-CeO 2 nanoscale heterostructure for low-temperature SOFC electrolyte uses.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Liu Tang,Yan Tong,Rongfeng Zheng,Weilu Liu,Yue Gu,Cong Li,Ruixue Chen,Zhiquan Zhang
A simple and novel electrochemical sensor was developed to determine levofloxacin based on the Ag nanoparticles/electrospun CeO 2 -Au composite nanofibers modified glassy carbon electrode (AgNPs/CeO 2 -Au/GCE). The electrospun CeO 2 -Au composite nanofibers provided a stable matrix and a large surface area for the fabrication of the sensing interface while the Ag nanoparticles dramatically promoted the current of levofloxacin on the electrode. Scanning electron microscopy and electrochemical methods were used to characterize the AgNPs/CeO 2 -Au composite film. The oxidative peak current was linear with the levofloxacin concentration in the range of 0.03–10 μM. The detection limit was as low as 0.01 μM ( S / N = 3), and the sensitivity could reach 1240 μA mM −1 cm −2 . Furthermore, the proposed modified electrode also could be feasibly applied to the determination of levofloxacin in human urine and blood serum samples.
研究领域:
分析化学
·
材料科学
·
医学检测
✓ 已验证
产品关联
DOI
高影响因子
WEAR
·
2025
·
IF 6.1
Xin Xing,Kun Han,Congcong Shi,Yujuan Zhang,Shengmao Zhang,Wenjing Lou,Wenbin Kan,Xu Zhou
In this paper, the good disperse and particle size adjustability of cerium oxide (CeO 2 ) nanoparticles were achieved by solvothermal secondary growth method. The micro-pitting resistance of three CeO 2 nanoparticles (1.85 nm, 2.85 nm, 4.22 nm) in polyalphaolefin (PAO)and gear oil was evaluated by reciprocating step loading method. The results showed that micro-pitting corrosion occurred in base oil lubrication from low load to high load (150 N-350 N). After adding CeO 2 nanoparticles, at low load (150 N), 2.85 nm and 4.22 nm CeO 2 nanoparticles formed a discontinuous CeO 2 tribofilm through shear sintering to reduce the surface shear force and produce significant anti-wear effect. The 1.85 nm CeO 2 has a friction-reducing and anti-wear effect through direct contact with isolated friction pairs. The formation of micro-pitting corrosion is inhibited by the three particle sizes, and the anti-wear performance decreases with the increase of particle size. Under the condition of high load (350 N), the discontinuous single CeO 2 tribofilm spillage due to its limited load capacity, which leads to increased wear and inhibits the formation of micro-pitting. Under the condition of high load (550 N), the formula oil has a micro-pitting phenomenon. After adding CeO 2 nanoparticles, a composite tribofilm containing cerium phosphate and CeO 2 is formed through tribochemical reaction with phosphorous additives, which greatly improves the bearing capacity and anti-wear ability of the tribofilm. Even under the condition of 550 N high load, the three particle sizes of CeO 2 nanoparticles have significant anti-wear effect and low friction properties, and all inhibit the formation of micro-pitting corrosion, among which 2.85 nm particle size of CeO 2 has the best anti-wear ability.
研究领域:
纳米材料
·
摩擦学
·
材料科学
·
化学合成
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2015
·
IF 4.529
Linen Wu,Siman Fang,Lei Ge,Changcun Han,Ping Qiu,Yongji Xin
Novel Ag@CeO 2 core–shell nanostructures with well-controlled shape and shell thickness were successfully synthesized via a green and facile template-free approach in aqueous solution. As-prepared samples were characterized by high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflection spectroscopy (DRS), electron spin resonance (ESR) and photoluminescence spectroscopy (PL). The structures with different core shapes and controllable shell thickness exhibited unique optical properties. It is found that the nanoscale Ag@CeO 2 core–shell photocatalysts exhibit significantly enhanced photocatalytic activities in the O 2 evolution and MB dye degradation compared to pure CeO 2 nanoparticals. The enhancement in photocatalytic activities can be ascribed to the localized surface plasmon resonance (SPR) of Ag cores. Moreover, larger active interfacial areas and contact between metal/semiconductor in the core–shell structure facilitate transfer of charge carriers and prolong lifetime of photogenerated electron-hole pairs. It is expected that the Ag@CeO 2 core–shell structure may have great potential in a wider range of light-harvesting applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Jiaman Wang,Jing Xiong,Zekai Cui,Yuanfeng Li,Hao Guo,Guilin Liu,Yaxiao Ma,Linsheng Xu,Jinqing Jiao,Jianping Zou,Yuechang Wei
CeO 2 , a pivotal rare earth oxide in environmental catalysis, has garnered extensive interest for soot oxidation owing to its exceptional oxygen storage capacity and oxygen vacancy-rich surfaces. To further optimize catalytic efficiency, we engineered spherical CeO 2 with exposed (111) facets via hydrothermal synthesis and uniformly anchored Pd species through a gas bubbling-assisted membrane reduction (GBMR) strategy. The formation of Pd–O–Ce interfacial units is identified as critical active sites, where metal-support interaction (MSI) significantly enhances oxygen transfer. Notably, the Pd 1.0 /CeO 2 catalyst achieves a remarkable T 50 of 356 °C (14% lower than pristine CeO 2 ), attributed to highly dispersed Pd species and abundant Pd–O–Ce interfaces. In contrast, excessive Pd species loading induces particle agglomeration, weakening MSI effect and catalytic performance. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and density functional thoery (DFT) calculations reveal that the Pd–O–Ce interface promotes NO adsorption – the rate limiting step – by generating electron-rich Pd sites and oxygen vacancies, thereby accelerating NO-to-NO 2 conversion and subsequent soot oxidation. This work highlights the pivotal role of interfacial engineering in optimizing Pd–CeO 2 catalysts, offering a rational design strategy for high-performance soot oxidation systems in diesel emission control.
研究领域:
环境催化
·
材料科学
·
多相催化
·
排放控制
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
STAR Protocols
·
2024
·
IF 1.3
Xinze Du,Yumei Liu,Xiaojun Shen
Summary Phenolic chemicals are important building blocks in chemical and material industries. In this protocol, we describe the preparation of CeO 2 -CuO catalysts and the application in the decarboxylative oxidation reaction of benzoic acids to phenols. Furthermore, we describe how to modify the basic sites of CeO 2 -CuO catalysts by CO 2 treatment to increase the selectivity of phenol and the regeneration process of used catalyst. For complete details on the use and execution of this protocol, please refer to Du et al. (2023). 1
研究领域:
催化
·
有机化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2017
·Vol. 32
·期 3
·e4201
·
IF 2.319
Mengqiu Huang,Jiasheng Fang,Yiwei Zhang,Chao Zhang,Yuming Zhou,Shuo Zhao,Yan Gao,Xiaoli Sheng
A novel magnetic binary-metal-oxide-coated nanocataly composing of a hollow Fe 3 O 4 core and CeO 2 -La 2 O 3 shells with Au nanoparticles encapsulated has been created in this work. The structural features of catalysts were characterized by several techniques, including SEM, TEM, UV-vis, FTIR, XRD, XPS and TGA analyses. After the coating of CeO 2 -La 2 O 3 layer, CeO 2 -La 2 O 3 /Au/C/Fe 3 O 4 microspheres showed a superior thermal stability and catalytic reactivity compared with a pure CeO 2 or La 2 O 3 layer. Accompanied by the burning of carbon layer, the specific surface could be increased by the formation of double-shelled structure. Besides, the desired samples could be separated by magnet, implying the superior recycle performance. Using the reduction of 4-nitrophenol by NaBH 4 as a model reaction, the microspheres exhibited highly reusability, superior catalytic activity, thermal stability, which are attributed to the unique double-shelled structure of the support, uniform distribution of Au nanoparticles, the highly thermal stability of CeO 2 -La 2 O 3 layer and mixed oxide synergistic effect. As a consequence, the unique nanocatalyst will open a promising way in the fabrication of the double-shelled hollow binary-metal-oxide materials for future research and has great potential in other applications.
研究领域:
材料科学
·
催化化学
✓ 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）