SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Jia'nan Wang,Can Cheng,Jiaying Xu,Zhisong Liu,Haomiao Xu,Wenjun Huang,Zan Qu,Naiqiang Yan
Tetrafluoromethane (CF 4 ), a highly potent greenhouse gas characterized by the notable capacity to absorb infrared radiation, making its effective control essential for mitigating global warming. However, the activation of CF 4 faces challenges in the conventional approaches caused by its symmetric structure and strong C F bonds. In this work, we presented an approach to enhance the activation of C F bonds using an inductance-enhanced Ce/Al 2 O 3 catalyst within the designed plasma-catalytic reaction system featuring a step-discharge effect. The optimal CF 4 decomposition efficiency reached approximately 89.5 % at the power of 18 W, while maintaining above 88.6 % for 24 h. The impact of plasma conditions and flue gas parameters on CF 4 decomposition and energy efficiency was also investigated. Py-IR showed that the Ce/Al 2 O 3 catalyst provided more Lewis acid sites as the active centers for breaking C F bonds. In situ FTIR and in situ OES studies revealed that the intermediates generated from CF 4 decomposition can react with active oxygen to form C O bond under the plasma-catalytic effect, preventing the reformation of C F bonds. DFT calculations demonstrated that the Ce/Al 2 O 3 exhibited a lower energy barrier to dissociate CF 4 and a stronger adsorption for O 2 . This work established a novel pathway for the activation of C F bonds to achieve the efficient decomposition of CF 4 at low temperatures.
研究领域:
环境化学
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等离子体催化
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材料科学
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温室气体减排
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表面化学
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 109
·期 1
·e70338
·
IF 3.8
Yuanyuan Li,Hongbing Yang,Yilei Huang,Shichang Cheng,Chang-An Wang,Yanhao Dong
As a pivotal optical material, the microstructure of YAG (yttrium aluminum garnet) nanocrystalline ceramics directly determines their laser and luminescent performance. This study demonstrates that rare-earth doping at grain boundaries significantly improves sintering behavior through a dual-stage regulation mechanism: during the initial stage (relative density 65%–90%), dopants (Nd/Ce) suppress mass diffusion by stabilizing grain boundary structures; whereas in the intermediate stage (75-85% relative density), they enhance diffusion by modifying grain boundary energy states. This kinetic regulation enables Nd-doped samples to achieve 99.3% relative density at 1200°C (50°C lower than pure YAG) while maintaining grain size at 57–64 nm. The doped systems achieved the requisite thermodynamic state for successful two-step sintering at significantly lower T 1 temperatures (Nd-YAG: 1175°C, Ce-YAG: 1175°C) compared with pure YAG (1200°C). The study confirms that Nd/Ce doping achieves coordinated densification-grain growth control through grain boundary segregation, providing critical theoretical guidance for fabricating high-performance transparent ceramics, particularly for developing novel Nd/Ce:YAG laser and scintillation ceramics.
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高影响因子
KEY ENGINEERING MATERIALS
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2012
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IF 0
Si Hui Wang,He Yun Wang,Fan Xing Meng,Ya Li Li
Abstract: The introduction of metal atoms into SiBCN network allows the development of novel high temperature ceramics and functional ceramics. In this work, cerium (Ce) containing polyborosilazane (PBSZ) is synthesized through substitution and polymerization reactions. Ce atoms are incorporated into PBSZ through the lithium replacement of H in PBSZ followed by Ce replacement of lithium. The chemical structure of the PBSZ and as-synthesized Li containing PBSZ are analyzed by Fourier transform infrared (FTIR) shows that the bands at 598 and 1183 cm-1 which can be assigned to Li-N and Si-N-Li stretching. It is suggested that lithium is incorporated into PBSZ. PBSZCe is transformed into SiBCNCe ceramic by pyrolysed in argon. Scanning electron microscope shows that the SiBCNCe ceramics are porous on the surface and corallike in the section. The chemical bondings of SiBCNCe ceramics are BN, the BN, SiC and Si3N4 characterized by X-ray photoelectron spectroscopy.
研究领域:
材料科学
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无机化学
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DOI
Micro & Nano Letters
·
2019
·Vol. 14
·期 13
·1307-1311
·
IF 0.975
Jin Li,Xiao Ying Guan
The effect of Ce doping on the structural and optical properties of BiFeO 3 nanoparticles via sol–gel method is reported. All samples were a pure phase with perovskite structure. The EDX results show the doped samples contain Bi, Fe, O and Ce elements. The vibrational properties of samples were studied using Raman spectroscopy. Photoluminescence shows an intense peak at 398 nm, the peak strength enhanced greatly and had redshift with the increase of Ce doping concentration. UV–vis results show the samples have a broad absorption band in the range of 500–600 nm. The bandgaps decrease with the concentration increase of Ce doping. It indicates the as-prepared BiFeO 3 can be used as visible light catalyst.
研究领域:
材料科学
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光学
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DOI
高影响因子
DESALINATION
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2025
·
IF 9.8
Silin Li,Wenjie Zheng,Wenlan Ji,Yunfei Shi,Tian Ren,Shihao Zhang,Xiao Wei,Yibin Wei
Catalytic ceramic membranes with ozonation have been considered promising for efficient organic pollutants degradation in water. Herein, cerium oxide-doped silicon carbide (Ce@SiC) ceramic membranes were developed via in-situ embedding CeO 2 nanoparticles into the porous SiC membrane that can be coupled with catalytic ozonation for efficient ciprofloxacin (CIP) degradation. Notably, the optimized Ce@SiC membrane with ozonation could achieve 94.3 % CIP degradation efficiency within 60 min, outperforming ozonation (63.4 %) or pristine SiC (66.1 %) alone. Meanwhile, the membrane showed excellent total organic carbon mineralization of 66.4 % for the CIP, which was significantly higher than that of using ozonation (19.8 %) or pristine SiC (30.1 %) alone, demonstrating enhanced oxidation efficiency. The high performance is attributed to the abundant oxygen vacancies on the Ce@SiC membrane surface, which facilitate ozone decomposition into hydroxyl ( OH) and superoxide ( O 2 − ) radicals, and the synergistic effect of the Ce 3+ /Ce 4+ redox cycle. The membrane not only exhibited robust catalytic stability in cycling experiments, but also excellent resistance to ion interference. Furthermore, the high catalytic performance was mainly attributed to the rich oxygen vacancies on the Ce@SiC membrane surface, which facilitates ozone decomposition into OH and O 2 − . This work offers a sustainable strategy of coupling catalytic ozonation with ceramic membrane for refractory antibiotics degradation.
研究领域:
环境科学
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材料科学
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化学工程
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水处理技术
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催化化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Xuepeng Wang,Yongde Yan,Yanghai Zheng,Jing Pan,Qingguo Zhang,Yun Xue,Milin Zhang,Kai Zhu
The efficient recovery of the radioactive elements uranium (U) and plutonium (Pu) from radioactive calcium fluoride slag is of great significance for the sustainable utilization of nuclear resources and environmental protection. Molten salt electrolysis technology based on pyrometallurgy, characterized by a streamlined process and the absence of secondary waste generation, is widely regarded as the most promising approach for the treatment of such radioactive residues. However, the physicochemical properties of molten salts and the underlying electrode reaction mechanisms under high-temperature conditions remain insufficiently understood and lack systematic investigation. In this study, by comparing the electrochemical parameters and physical-chemical properties of different molten salt systems, it was found that the CaCl 2 -CaF 2 molten salt system is a suitable choice for treating radioactive calcium fluoride waste. Due to the high radioactivity of plutonium (Pu), cerium (Ce) was employed as a chemical analogue of plutonium to investigate the electrochemical extraction of actinides in CaCl 2 -CaF 2 molten salt systems. The electrochemical behavior of Ce(III) on a W electrode and related kinetic parameters were investigated. Electrochemical analysis reveals that Ce(III) undergoes a quasi-reversible and diffusion-controlled reduciton on inert W electrode. The process shows distinct adsorption and desorption, likely attributable to the coexistence of Cl − and F − ions. To better extract Ce, nickel (Ni) ions were introduced into the molten salt. The co-deposition behavior of Ce(III) and Ni(II) on the W electrode was investigated by electrochemical methods. The thermodynamic parameters of Ce-Ni intermetallic compounds at the experimental temperature were calculated. The results show that CeNi 5 has a distinct thermodynamic advantage in formation. X-Ray Diffraction (XRD)， Scanning Electron Microscopy (SEM) and Energy Dispersive Spectrometer (EDS) characterization analyses confirmed the successful extraction of Ce in the form of the CeNi 5 intermetallic compound.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 21
·15196-15203
·
IF 2.993
Song Li,Dong Yan,Shao Qiyue,Jiang Jianqing
Nano-yttrium aluminum garnet (YAG) is a promising material for use in white light-emitting diodes and biological fluorescent probe. However, its existing preparation methods often suffer from low synthesis temperature and particle agglomeration. Therefore, preparing YAG nanoparticles with both high crystallinity and high dispersibility is difficult, which severely limits the applications of nano-YAG phosphor. This work presents a salt microemulsion method that can yield YAG nanoparticles of size 4–6 nm that are dispersed at a high temperature (1000 °C). Transmission electron microscope analysis shows that the precursor particles are dispersed and isolated by nano-sized potassium sulfate particles. Because the melting point of potassium sulfate is high (1067 °C), the precursors and the YAG nanoparticles are always dispersed and isolated by the solid potassium sulfate salt during calcination at high temperatures, resulting in the formation of dispersed YAG nanoparticles with good crystallinity. The reflection spectrum of nano-YAG exhibited a redshift compared to that of bulk YAG. When the Ce content is 0.06, the nano-YAG phosphor exhibited the highest internal photoluminescence quantum yield of 51.2%, and the decrease in the particle size did not increase the quenching concentration. The nano-YAG prepared at a high temperature also exhibited improved optical stability: The luminescence intensity of the nano-YAG decreased by only~ 16% after 48 h of irradiation using blue laser. The obtained 4–6-nm-sized Y 3 Al 5 O 12 :Ce nanophosphors are expected to be ideal materials for novel fluorescent probes and preparation of transparent ceramics.
研究领域:
材料科学
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光学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2026
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IF 8.3
Chaofan Ma,Ningning Wang,Huiyu Su,Kechen Zhou,Yazhou Yang,Chaoqi Zhu,Dawen Zeng
High sensitivity acetone sensor can realize the non-invasive detection of diabetic patients. SnO 2 and Ce doped SnO 2 with nanofibers structure were prepared from environmentally friendly and renewable nanocrystalline cellulose as a template. The preparation method is highly efficient and environmentally friendly. The characterization results indicate that the SnO 2 and Ce doped SnO 2 nanofibers are composed of 3–5 nm SnO 2 nanoparticles, which exhibited strong catalytic ability with quantum dots effect and high specific surface area. In addition, DFT calculations revealed that doped Ce activated the surrounding Sn atoms, significantly enhancing the adsorption capacity of Sn for acetone. Ce doping reduces the band gap of SnO 2 , which is more conducive to the excitation transition of electrons. And the difference in ionic radius between Ce 3 + and Sn 4+ will cause lattice distortion and introduce more oxygen vacancies, further enhancing the adsorption capacity of acetone. In situ infrared spectroscopy investigated the catalytic oxidation process of acetone on the sensor surface. The 3 wt% Ce doped SnO 2 nanofibers exhibited good sensing performance and low detection limit for acetone gas at 170°C. The efforts in the research have demonstrated that Ce doped SnO 2 nanofibers may be potential candidates for the detection of exhaled gases in diabetes.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2014
·Vol. 39
·期 22
·11642-11650
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IF 2.93
Si Zhou,Jianxin Zou,Xiaoqin Zeng,Wenjiang Ding
The catalytic effects of rare earth fluoride REF 3 (RE = Y, La, Ce) additives on the dehydrogenation properties of LiAlH 4 were carefully investigated in the present work. The results showed that the dehydrogenation behaviors of LiAlH 4 were significantly altered by the addition of 5 mol% REF 3 through ball milling . The destabilization ability of these catalysts on LiAlH 4 has the order: CeF 3 >LaF 3 >YF 3 . For instance, the temperature programmed desorption (TPD) analyses showed that the onset dehydrogenation temperature of CeF 3 doped LiAlH 4 was sharply reduced by 90 °C compared to that of pristine LiAlH 4 . Based on differential scanning calorimetry (DSC) analyses, the dehydriding activation energies of the CeF 3 doped LiAlH 4 sample were 40.9 kJ/mol H 2 and 77.2 kJ/mol H 2 for the first and second dehydrogenation stages, respectively, which decreased about 40.0 kJ/mol H 2 and 60.3 kJ/mol H 2 compared with those of pure LiAlH 4 . In addition, the sample doped with CeF 3 showed the fastest dehydrogenation rate among the REF 3 doped LiAlH 4 samples at both 125 °C and 150 °C during the isothermal desorption. The phase changes in REF 3 doped LiAlH 4 samples during ball milling and dehydrogenation were examined using X-ray diffraction and the mechanisms related to the catalytic effects of REF 3 were proposed.
研究领域:
材料科学
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氢气储存
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固态化学
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能源材料
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2023
·
IF 4.5
Yangyang Xie,Lei Zhou,Jian Li,Xuxia Zhang,Kejia Liu,Hui Zhang,Tao Qi
The zinc-cerium redox flow battery has great potential in the field of energy storage for the merits of high voltage and low cost. However, undesirable dendrites growth and insufficient active sites of Zn anode electrode remain a grand challenge to obtain a good reversibility and cycling stability. Herein, we propose a promising and universal method to stabilize Zn anode by modifying commercial graphite carbon felt with metal–organic framework derivative. Owing to the porous structure and rich active sites of heteroatom N and O introduced by metal–organic framework derivative, the modified carbon felts can effectively induce zinc uniformly nucleation and deposition. As a result, the carbon felt electrode modified with ZIF-8 derivative exhibits a lower overpotential than pristine carbon felt electrode. And it exhibits a high average energy efficient of 80.0 % at the current density of 20 mA cm −2 for 14 cycles, which is better than previous results of Zn-Ce redox flow battery. When modified with cobalt-base ZIF-67 derivative, the energy efficient can even reach up to 86.07 % in first cycle. This work offers a strategy in zinc-based redox flow battery research to improve the reversibility and cycling ability by introducing metal–organic framework derivative.
研究领域:
储能
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电化学
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材料科学
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氧化还原液流电池
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 7
·3260-3268
·
IF 3.784
Qi Zhang,Ruilin Zheng,Jianyong Ding,Peng Cui,Zhongyue Wang,Peng Lv,Wei Wei
Thermally robust and highly efficient green-emitting luminescent ceramics are gradually attracting great attention as promising phosphors using in high-brightness laser phosphor display to reduce serious speckle noise as well as high cost. However, lumen density is still seriously restricting their potential applications especially under high-power density laser due to insufficient absorption of blue laser and significant thermal quenching. Here, we report an Al 2 O 3 -LuAG: Ce composite ceramic phosphor (CCP) for high-brightness laser phosphor display. Owing to good optical properties and high thermal conductivity of Al 2 O 3 , the Al 2 O 3 -LuAG: Ce CCP shows high photoluminescence quantum yield (79.6%), low thermal quenching (only 3.2% loss in luminescence at 200°C), and high thermal conductivity (18.9 W·m −1 ·K −1 ). Moreover, the Al 2 O 3 , as scattering centers, enhances the Rayleigh–Mie scattering of the blue laser, and hence the absorption of the Al 2 O 3 -LuAG: Ce CCP exhibits a remarkable improvement (~2.3 times) at 450 nm. Finally, with optimized thickness (0.3 mm) of Al 2 O 3 -LuAG: Ce CCP, an excellent luminous efficiency (216 lm·W −1 ) and outstanding lumen density (6129 lm·mm −2 ) of the green-emitting light source was obtained by driving under a high-power density (28.33 W·mm −2 ) blue laser. All of those validate the suitability of the Al 2 O 3 -LuAG: Ce CCP for high-brightness display.
研究领域:
材料科学
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光学工程
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光子学
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显示技术
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DOI
高影响因子
CATALYSIS LETTERS
·
2024
·Vol. 154
·期 7
·3787-3797
·
IF 2.3
Han Zhaohao,Chu Qingyan,Wang Hao,Jia Xiaoqiong,Jiang Peng,Li Tong
We successfully synthesized a bifunctional alkaline catalyst (Co@CTS-1), on the one hand, which demonstrates exceptional catalytic performance in the aerobic oxidation of alkenes, particularly in the epoxidation of styrene, in the absence of both an initiator and a co-reducing agent, achieving a conversion rate of 74.94%, a selectivity of 71.84% for styrene oxide; on the other hand, the catalyst maintained its high activity throughout a cyclic reaction run lasting up to 2500 min, demonstrating exceptional stability in the epoxidation of styrene. The Co@CTS-1 catalyst utilizes TS-1 as the carrier, and it is modified with cobalt and cerium elements. Through the embedding of cobalt elements within the TS-1 cage, the catalyst gains the ability to activate O 2 , and by inserting cerium elements into the atomic positions of silicon, the conversion rate is further enhanced. This encapsulated structure stabilizes cobalt nanoparticles, overcoming the short lifespan issues caused by sintering and leaching in conventional supported catalysts. This work provides practical clues for the development and application of novel catalysts, and will inspire the advancement of olefin air epoxidation. Graphical
研究领域:
催化化学
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材料科学
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化学工程
·
无机化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）