JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2017
·
IF 3.454
Shuilin Chen,Benxue Jiang,Qinghua Yang,Yiguang Jiang,Pande Zhang,Qijun Gan,Ge Zhang,Jintai Fan,Xiaojian Mao,Long Zhang
A Ce-doped (Gd 2 Y)(Ga 3 Al 2 )O 12 ceramic with good performance was fabricated by sintering in an oxygen atmosphere and hot isostatic pressing . The microstructure as well as the optical and scintillation characteristics of the ceramic was investigated. The ceramic exhibited a high transmittance of 78% in the range of 500–800 nm. The radioluminescence intensity of the ceramic reached up to 30 times that of a bismuth germinate single crystal , and the light yield within 750 ns shaping time was approximately 25800 photons/MeV under 137 Cs γ-ray irradiation.
研究领域:
材料科学
·
陶瓷
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光学材料
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核探测
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固态物理
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Jiaping Guan,Guomin Sun,Gaoyuan Yu,Yu Chen,Jiawen Wei,Xiaohui Zhu,Xiaogu Huang
Sodium-ion batteries (SIBs) have garnered significant interest due to their cost-effectiveness and operational similarities to lithium-ion batteries. Amongst the various components, the cathode plays a pivotal role in determining the energy density of these batteries. Mn-based layered oxides stand out as promising cathode materials, owing to their abundance and non-toxicity. However, these oxides tend to suffer from structural instability during high-voltage cycling, leading to a decline in capacity. In this work, we have designed Ce-doped Na 0.6 Li 0.2 Mn 0.79 Ce 0.01 O 2 cathodes through a solid-state reaction process. This innovation aims to inhibit undesirable phase transitions and enhance the electrochemical performance of the electrodes. By integrating electrochemical testing with a suite of characterization techniques, we have shown that 1 mol% Ce doping effectively suppresses the formation of birnessite and the irreversible oxygen redox reactions in the high-voltage region. Moreover, our findings indicate that the detrimental phase transitions can be significantly mitigated throughout the electrochemical cycling process, thereby bolstering structural stability. Notably, the capacity of the Ce-doping cathode after 20 cycles substantially exceeds its initial discharge specific capacity, reaching 169.3 mAh g –1 . This research introduces a strategy for stabilizing the cathode structure of P2-type Mn-based layered oxides through Ce-doping, offering valuable insights for the advancement of next-generation SIBs.
研究领域:
材料科学
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电化学
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能源存储
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无机化学
·
固态化学
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高影响因子
BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Zhiqin Li,Yuxin Kang,Tengran luo,Zegang Qiu,Zhuoyuan Li,Yanan Zhu
Ce reduced the charge density around Co and enriched defects on surface of catalyst. • Ce incorporation facilitates vanillin adsorption and H 2 activation at molecular level. • 9Co-1Ce/NC achieves 100 % vanillin conversion and 100 % selectivity of target product. • Co-Ce synergy promotes rate-determining C-O bond cleavage of two-step reaction pathway. The efficient conversion of lignin-derived oxygenates into fuels and high-value chemicals is pivotal for the development of renewable energy systems. A central challenge lies in the selective cleavage of the inherently recalcitrant C–O bonds in bio-oil model compounds under mild conditions. In this study, a multi-interface Co-Ce catalyst supported on nitrogen-doped carbon was successfully constructed via a bimetallic synergy and metal–organic framework (MOF)-derived strategy. The introduction of Ce exerted a multifunctional synergistic effect beyond that of a conventional promoter, realizing multi-scale modulation of the catalyst structure and performance. It modulated the electronic structure of Co active sites, thereby optimizing reactant adsorption and H 2 activation. Also, it suppressed the agglomeration of Co nanoparticles, thereby enhancing metal dispersion. Concurrently, it significantly increased the concentration of oxygen vacancies on the support surface, which collaboratively provided abundant active sites. Furthermore, it guided the formation of a hierarchical pore architecture conducive to mass transfer. Through this precise design and regulation of the active site microenvironment, the optimal catalyst achieved 100 % conversion of the model compound vanillin with 100 % selectivity toward 2-methoxy-4-methylphenol (MMP) under mild conditions, while also exhibiting excellent cycling stability and broad substrate applicability. This work not only demonstrates catalytic performance rivaling that of noble metals through the efficient synergy between non-noble metals (Ce and Co) but, more importantly, elucidates the underlying mechanism for the selective cleavage of C–O bonds. Download: Download high-res image (117KB) Download: Download full-size image
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高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Xiaoxia Jiang,Xiangling Zhang,Yong Wang,Xuhao Li,Xinxian Zhang,Shilong Cao,Jiangwei Chen,Chen Wang,Zhouying Xu,Yu Jiang
Ce(Ⅳ) markedly enhanced the electrochemical removal rate of M. aeruginosa . • Simultaneous removal of algae (92.5%) and MC-LR (94.1%) was achieved in 60 min. • Kinetic analysis indicates a strong synergistic effect in E-Ce (IV) system. • Multi-target cellular damage drives population-level algal inactivation. The frequent occurrence of cyanobacterial blooms poses severe challenges to aquatic environmental safety and conventional water treatment processes. While electrochemical oxidation is operationally simple, its efficiency in algal cells removal is often limited by low current efficiency and prevalent side reactions in conventional systems. This study developed a Ce(IV)-assisted electrochemical system, E-Ce(IV), incorporating Cerium(IV) (Ce(IV)) to boost the removal of Microcystis aeruginosa ( M. aeruginosa ). A synergistic effect between Ce(IV) chemical oxidation and direct electro-oxidation was identified, significantly improving algal removal performance. Under optimal conditions, the E-Ce(IV) system achieved a high removal rate of 92.5% within 60 min, markedly superior to the Ce(IV) alone system (4.68%) and direct electro-treatment (DET) system (57%). Mechanistic investigations revealed that the E-Ce(IV) system synergistically disrupted cellular membrane integrity, as well as their photosynthetic and antioxidant capacities. Concurrently, the system degraded algal organic matter, achieving a 94.1% degradation rate of the cyanotoxin microcystin-LR (MC-LR). Further assessment of different typical water matrices and bodies demonstrated the feasibility of the system for algal control under acidic conditions. As a proof-of-concept batch treatment process under acidic, sulfate-supported conditions, this work extended the E-Ce(IV) process from degrading organic pollutants to removing algal cells, offering preliminary insights into its multi-target synergistic inactivation mechanism. The simultaneous efficient degradation of cyanotoxins suggests that this approach may offer a potential strategy for algal bloom control when applied with mild pre-acidification and sulfate electrolyte supplementation. Download: Download high-res image (341KB) Download: Download full-size image
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Li Zhang,Jin Liang,Yaxi Zhang,Tian Lei,Guang Yang,Yunfeng Li
This work addresses the critical challenges of expensive noble-metal catalysts and inferior conductivity of transition metal hydroxides in water electrolysis by developing in-situ grown NiMn layered double hydroxide (NiMn LDH/NF) self-supported electrodes through one-step electrodeposition on nickel foam. The engineered 2D porous nanosheet architecture delivers abundant active sites, achieving exceptional hydrogen evolution reaction (HER) performance with 17 mV overpotential at 10 mA cm-2. Furthermore, cerium doping strategy effectively regulates nucleation kinetics through Ce3+/Ce4+ redox couples, constructing flower-like hierarchical Ce-NiMn LDH/NF architecture. The optimized electronic structure and enhanced surface hydroxylation significantly boost oxygen evolution reaction (OER) kinetics, requiring merely 212 mV overpotential to deliver the current density of 50 mA cm-2. The NiMn LDH/NF||Ce-NiMn LDH/NF electrolytic system demonstrates exceptional performance for overall water splitting, achieving an ultralow cell voltage of 1.44 V at 10 mA cm-2. Remarkably, it retains 97.66 % of its initial activity after 100 h of continuous operation, underscoring the efficacy of the rare-earth cation-doped structural engineering strategy. This approach enables the rational design of high-performance, durable, and cost-effective electrocatalytic systems by synergistically optimizing electronic configurations, active site accessibility, and long-term stability.
研究领域:
电化学
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材料科学
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能量存储与转换
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催化
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纳米材料
·
可再生能源
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产品关联
DOI
高影响因子
CHROMATOGRAPHIA
·
2014
·Vol. 78
·期 1
·119-123
·
IF 1.37
Yang Xiujuan,Liu Cui,Chen Zuanguang
A novel and rapid method was developed for the determination of uric acid in human urine by capillary electrophoresis with an improved electromagnetic induction detector. Electrophoretic parameters affecting the separation efficiency, such as buffer composition, buffer pH, buffer concentration, and electroosmotic flow modifier, were systematically investigated. An electrolyte solution consisting of 8.5 mmol L −1 tris(hydroxymethyl)aminomethane (Tris), 1.5 mmol L −1 citric acid, and 0.2 mmol L −1 cetyltrimethylammonium bromide, pH 8.0, was found to be suitable for sample determination. Uric acid was separated and detected within 2.3 min, with a linear response range from 5 to 400 µg mL −1 and a correlation coefficient of 0.9998. Intraday and interday precision were 1.6 and 2.5 % ( n = 6), respectively. The recoveries were between 98.3 and 100.5 %. This simple, effective, and stable method is a good alternative to existing methods for uric acid determination. Also, the improved electromagnetic induction detector holds great promise in clinical analysis.
研究领域:
分析化学
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临床分析
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电泳技术
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高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2020
·Vol. 37
·期 4
·623-632
·
IF 2.69
Yan Zhinan,Kang Yong,Li Dan,Liu Yu Chun
Hematite (α-Fe 2 O 3 ) is a promising alternative to the catalysts currently used due to its low cost, fairly good activity and environmentally friendly properties. In this study, α-Fe 2 O 3 /SiO 2 nanocatalysts promoted with cobalt and cerium (Co 3 O 4 -CeO 2 -α-Fe 2 O 3 /SiO 2 ) were prepared via wet co-impregnation method, and the effects of promoters on catalytic performances for SO 2 oxidation at different temperatures, SO 2 concentrations, cycle numbers, catalytic stability as well as catalyst charging were investigated. The results indicated that SO 2 conversion rose with the increasing of catalyst charging and SO 2 concentration. Also, the as-prepared catalyst had the maximum SO 2 conversion at the reaction temperature of 500 °C, excellent catalytic recyclability and activity stability. Its physicochemical and redox properties were characterized by XRD, BET, SEM, FT-IR and XPS. The results of XRD and FT-IR spectra confirmed that the formation of Ce 2 FeO 4 network in the Co-Ce co-doped catalysts proved the promoting effect of cerium on higher valence state of the active ingredient. The N2 adsorption/desorption results evidenced that cerium could increase the proportion of mesoporous, and the XPS spectra indicated that cobalt and cerium in the catalysts could increase the available oxygen (O β /O α ) for the redox reaction. Due to its excellent low onset temperature, fairly good activity and environmentally friendly properties, the as-prepared catalyst of Co 3 O 4 -CeO 2 -α-Fe 2 O 3 /SiO 2 appeared to be more efficient for the SO 2 conversion in a large concentration range.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Tingliang Xie,Minxuan Chen,Cong Xu,Jing Chen
Microextractors are known to provide high mass transfer rates for the extraction and separation of rare-earth elements (REEs). High-throughput microextractors are essential for industrial-scale production of REEs, but few practical studies have been conducted to date. In this work, a chaotic advection microextractor, i.e., a three-stage microextractor, was designed and demonstrated to extract Pr(III) and Ce(III) efficiently from nitric acid media at high throughputs by using 2-ethylhexyl phosphoric acid-2-ethylhexyl ester (P507) and sulfonated kerosene as an extraction agent and a diluent, respectively. Flow visualization experiments showed that the dispersed phase could be effectively broken into small droplets owing to vortex and recirculation flows. Microextraction experiments performed under optimal extraction conditions indicated that at low throughputs, the concentration ratio D , extraction efficiency E , and separation factor β decreased with an increase in the throughput, whereas at high throughputs, D , E , and β increased with an increase in the throughput. An extraction efficiency close to that of co-current balanced extraction was successfully achieved, even at a high total throughput of 100 mL/min and a rather short residence time of 0.029 s. Thus, the chaotic advection microextractor features a high throughput and high extraction efficiency, which are appropriate for the high-efficiency extraction and separation of REEs.
研究领域:
化学工程
·
分离科学
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稀土冶金
·
微流控技术
·
过程强化
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Junjie Zhou,Hao Liu,Yichao Lin,Chen Zhou,Aisheng Huang
A well-shaped Ce (IV)-based metal organic framework (Ce-BDC) is prepared under solvothermal method. The influence of synthesis time, temperature and the amount of acetic acid (HAc) as a modulator is studied to develop a new strategy for the synthesis of well-shaped Ce-based MOF. The relationship between the synthesis parameters and morphology as well as crystallinity of Ce-BDC is investigated by XRD and SEM. Furthermore, the obtained well-shaped Ce-BDC shows a CO 2 uptake capacity of 2.28 mmol g −1 at 0 °C and 1.0 bar. Meanwhile, the breakthrough curve behaviors of Ce-BDC are investigated for a CO 2 /CH 4 and CO 2 /N 2 mixture gas . It is found that the Ce-based MOF adsorbs CO 2 under ambient temperature and pressure, but completely excludes CH 4 and N 2 , suggesting that it is a promising adsorbent for efficient separation of CO 2 from natural gas.
研究领域:
材料科学
·
无机化学
·
多孔材料
·
气体分离
·
环境催化
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高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Yi Cui,Hongye Huang,Meiying Liu,Junyu Chen,Fengjie Deng,Naigen Zhou,Xiaoyong Zhang,Yen Wei
Cellulose nanocrystals (CNCs) are a novel type of natural nanomaterials that have attracted tremendous research interest for various applications especially in the biomedical fields owing to their natural origin, biodegradable potential, remarkable biocompatibility and massive reactive hydroxyl groups. In this work, a novel strategy has been developed for fabrication of luminescent CNCs with aggregation-induced emission (AIE) feature for the first time through a facile one-step Ce(IV) redox polymerization for direct surface grafting of AIE dye (PhE) and hydrophilic monomer Poly(ethylene glycol) monomethyl ether acrylate (PEGMA) on CNCs. Various characterization techniques would demonstrate the successful preparation of resultant CNC-PhE-PEGMA with uniform nanoscale size, remarkable fluorescent properties and extremely low cytotoxicity. Furthermore, compared with conventional modification strategy of CNCs, Ce(IV) redox polymerization only need moderate temperature and can operate in aqueous solution utilizing surface hydroxyl groups of CNCs as polymerization activity sites. More importantly, CNC-PhE-PEGMA show desirable fluorescent properties and can be used for cell dyeing, indicating their potential for biomedical applications.
研究领域:
纳米医学
·
生物材料学
·
高分子化学
·
细胞生物学
·
诊断影像学
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Minghui Zhou,Jun Sun,Bei Zhang,Youjie Hua,Feifei Huang,Hongping Ma,Renguang Ye,Shiqing Xu
Phosphor-in-ceramic (PiC) has garnered considerable attention in high-power white laser lighting owing to its advantages, such as high efficiency and good thermal stability. In this study, a transparent hydroxyapatite (HA) ceramic was successfully prepared via spark-plasma sintering (SPS) under relatively mild conditions. A series of ultra-high efficiency green-emitting PiCs were obtained by pure HA ceramics with 1–12% Lu 3 Al 5 O 12 : Ce (LuAG) phosphors. Owing to the rapid sintering of SPS and the stability of HA ceramics, HA ceramic matrix has high transparency, and does not damage the crystal structure of the LuAG phosphor. When excited by a blue laser, the HA-LuAG PiC exhibited an excellent luminous efficacy of 300.48 lm·W −1 . The fluorescence saturation threshold of the laser power was approximately 7.90 W. These results demonstrate that HA-LuAG PiCs have great potential for applications as efficient green-emitting phosphor conversion materials for high-power laser lighting.
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xinyu Hu,Yao Zhang,Mingrong Lu,Min Yang,Jianmin Li,Zhengmei Wang,Guizhen Li,Hongbin Wang
In the present work, Ce-UiO-66, namely cerium-organic framework was prepared through rapid one-step solvothermal method, uncovering it potency to effectively get rid of tetracycline (TC) from an aqueous solution. The morphology and structure of Ce-UiO-66 materials were characterized by typical traditional methods such as FESEM, XRD , FTIR, and XPS. The process performance in terms of TC removal was investigated at different operating conditions. Specifically, when the dose, pH value, adsorption time, and temperature were 20 mg, 9, 180 min, and 25 ℃ respectively, the removal effect of TC was the best. The adsorption process of TC was described using the Freundlich model and the quasi second order model, respectively. The removal efficiency of TC by UiO-66 before modification was only 40.37%, and the adsorption amount was 44.38 mg⋅g −1 , while the removal efficiency of TC adsorption by Ce-UiO-66 could reach about 90% under the optimal adsorption conditions, and the maximum adsorption amount was 86.95 mg⋅g −1 . The data showed that Ce-UiO-66 exhibits good TC adsorption performance. And TC adsorption process was spontaneous and endothermic multi molecular layer chemical adsorption . Ce doping increased the quantity of active sites, and promoted the synergistic effects of electrostatic attraction, π-π conjugation, and hydrogen bonding between the adsorbent and TC, thus improving the adsorption effect of TC. As everyone knows that the application of UiO-66 in the adsorption field can be broadened by doping other metal ions , which prove that the metal skeleton adsorption material has broad development prospects in the next few years.
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高影响因子
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