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Adsorption 1

Bromate 1

CFD simulation 1

Catalytic ozonation 1

CeO2 removal 1

Cerium dioxide 1

CmimCl/Si 1

Graphene oxide 1

H-mordenite 1

Iron oxide 1

Ru–Ce/AlO 1

acidity 1

alcohol 1

amination 1

catalyst under hydrogen containing atmosphere 1

catalytic ozonation 1

cerium 1

cerium dioxide 1

coke oven gas 1

comparison experiment 1

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Inhibition of bromate formation by reduced graphene oxide supported cerium dioxide during ozonation of

Bei Ye, Zhuo Chen, Xinzheng Li, Jianan Liu, Qianyuan Wu, Cheng Yang, Hongying Hu, Ronghe Wang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 6, doi: 10.1007/s11783-019-1170-z

Abstract: Cerium oxide (less than 5 mg/L) supported on reduced GO (xCeO2/RGO) significantly inhibited bromate formation

Keywords： Bromate     Catalytic ozonation     Graphene oxide     Cerium dioxide    

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Plasma-electrochemical synthesis of europium doped cerium oxide nanoparticles

Liangliang Lin, Xintong Ma, Sirui Li, Marly Wouters, Volker Hessel

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 3,   Pages 501-510 doi: 10.1007/s11705-019-1810-7

Abstract: In the present study, a plasma-electrochemical method was demonstrated for the synthesis of europium doped ceria nanoparticles. Ce(NO ) ·6H O and Eu(NO ) ·5H O were used as the starting materials and being dissolved in the distilled water as the electrolyte solution. The plasma-liquid interaction process was investigated by an optical emission spectroscopy, and the obtained products were characterized by complementary analytical methods. Results showed that crystalline cubic CeO :Eu nanoparticles were successfully obtained, with a particle size in the range from 30 to 60 nm. The crystal structure didn’t change during the calcination at a temperature from 400°C to 1000°C, with the average crystallite size being estimated to be 52 nm at 1000°C. Eu ions were shown to be effectively and uniformly doped into the CeO lattices. As a result, the obtained nanophosphors emit apparent red color under the UV irradiation, which can be easily observed by naked eye. The photoluminescence spectrum further proves the downshift behavior of the obtained products, where characteristic D → F transitions of Eu ions had been detected. Due to the simple, flexible and environmental friendly process, this plasma-electrochemical method should have great potential for the synthesis of a series of nanophosphors, especially for bio-application purpose.

Keywords： plasma-electrochemical method     europium doped ceria     rare earth nanoparticles     photoluminescence    

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Catalytic activity of cerium-doped Ru/AlO during ozonation of dimethyl phthalate

ZHOU Yunrui, ZHU Wanpeng, CHEN Xun

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 3,   Pages 354-357 doi: 10.1007/s11783-008-0059-z

Abstract: factors influencing the mineralization of dimethyl phthalate (DMP) during catalytic ozonation with a cerium-dopedIt showed that doping cerium significantly enhanced catalytic activity.Catalytic activity reached the maximum when 0.2% of ruthenium and 1.0% of cerium were simultaneously

Keywords： Ru–Ce/AlO     dimethyl phthalate     mineralization     comparison experiment     catalytic ozonation    

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Reduction of CeO

Elena Yu. KONYSHEVA

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 3,   Pages 249-261 doi: 10.1007/s11705-013-1333-6

Abstract: The enhanced reduction of cerium oxide was observed initially at 800°C in all composites in spite ofDue to continuous reduction of cerium oxide in La Sr CoO ? CeO and La Sr MnO ?After 3 h exposure to H -Ar at 800°C the reduction of cerium oxides and perovskite phases in La Ni FeThe extent of cerium oxide involvement in the reduction process varies with time, and depends on its

Keywords： reduction of cerium oxide     composites     perovskites     catalyst under hydrogen containing atmosphere    

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Reductive amination of -hexanol to -hexylamine over Ni–Ce/-AlO catalysts

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 82-92 doi: 10.1007/s11705-022-2181-z

Abstract: Herein, cerium doped nickel-based catalysts were synthesized and tested in a gas-phase amination of <>-Al2O3 catalyst is significantly improved by doping an appropriate amount of ceriumThe presence of cerium effectively inhibits the agglomeration of nickel particle, resulting in betterCerium doping also improves the reduction ability of nickel and enhances the interactions between NiMore weak acid sites were also found in those cerium doped catalysts, which promote another key step—ammonia

Keywords： amination     alcohol     cerium     nickel     acidity     interaction    

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Pressure drop analysis on the positive half-cell of a cerium redox flow battery using computational fluid

Fernando F. Rivera, Berenice Miranda-Alcántara, Germán Orozco, Carlos Ponce de León, Luis F. Arenas

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 399-409 doi: 10.1007/s11705-020-1934-9

Abstract: taking place in a rectangular channel electrochemical flow cell used as the positive half-cell of a cerium-basedCalculated pressure drop was validated against experimental data obtained with typical cerium electrolytes

Keywords： CFD simulation     porous media     porous electrode     pressure drop     redox flow battery    

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Removal and recovery of toxic nanosized Cerium Oxide using eco-friendly Iron Oxide Nanoparticles

Kanha Gupta, Nitin Khandelwal, Gopala Krishna Darbha

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1194-4

Abstract: Eco-friendly IONPs were synthesized through solvothermal method. IONPs show very high removal efficiency for CeO2 NPs i.e. 688 mg/g. Removal was >90% in all synthetic and real water samples. >80% recovery of CeO2 NPs through sonication confirms reusability of IONPs. Increasing applications of metal oxide nanoparticles and their release in the natural environment is a serious concern due to their toxic nature. Therefore, it is essential to have eco-friendly solutions for the remediation of toxic metal oxides in an aqueous environment. In the present study, eco-friendly Iron Oxide Nanoparticles (IONPs) are synthesized using solvothermal technique and successfully characterized using scanning and transmission electron microscopy (SEM and TEM respectively) and powder X-Ray diffraction (PXRD). These IONPs were further utilized for the remediation of toxic metal oxide nanoparticle, i.e., CeO2. Sorption experiments were also performed in complex aqueous solutions and real water samples to check its applicability in the natural environment. Reusability study was performed to show cost-effectiveness. Results show that these 200 nm-sized spherical IONPs, as revealed by SEM and TEM analysis, were magnetite (Fe3O4) and contained short-range crystallinity as confirmed from XRD spectra. Sorption experiments show that the composite follows the pseudo-second-order kinetic model. Further R2>0.99 for Langmuir sorption isotherm suggests chemisorption as probable removal mechanism with monolayer sorption of CeO2 NPs on IONP. More than 80% recovery of adsorbed CeO2 NPs through ultrasonication and magnetic separation of reaction precipitate confirms reusability of IONPs. Obtained removal % of CeO2 in various synthetic and real water samples was>90% signifying that IONPs are candidate adsorbent for the removal and recovery of toxic metal oxide nanoparticles from contaminated environmental water samples.

Keywords： Adsorption     toxic metal oxide remediation     eco-friendly IONP     Iron oxide     CeO2 removal    

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Synthesis of ordered cerium-doped cubic mesoporous silica using long-chain ionic liquid as template

YUE Hongxia, ZHAO Hongmei, LIU Longjiang, WANG Siping, Ruan Qiong, WANG Tongwen

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 2,   Pages 135-139 doi: 10.1007/s11705-008-0031-2

Abstract: long-chain ionic liquid 1-hexadecyl-3-methylimidazolium chloride (CmimCl) was used as a template to prepare cerium-dopedCerium in calcined porous framework exists in the form of well-dispersed tetrahedral coordination.The CmimCl shows a high tendency toward self-aggregation that allows the formation of the cerium-doped

Keywords： mesoporous     CmimCl/Si     tendency     mesostructure     synthesis procedure    

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Catalytic performance of Co-Mo-Ce-K/γ-Al

Yuqiong ZHAO, Yongfa ZHANG

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 457-460 doi: 10.1007/s11705-010-0524-7

Abstract: The catalytic performance of Co-Mo-Ce-K/γ-Al O catalyst for the shift reaction of CO in coke oven gas is investigated using X-ray diffraction (XRD) and temperature-programmed reduction (TPR). The results indicate that Ce and K have a synergistic effect on promoting the catalytic activity, and the Co-Mo-Ce-K/γ-Al O catalyst with 3.0 wt-% CeO and 6.0 wt-% K O exhibits the highest activity. CeO favors Co dispersion and mainly produces an electronic effect. TPR characterization results indicate that the addition of CeO -K O in the Co-Mo-Ce-K/γ-Al O catalyst decreases the reduction temperature of active components, and part of octahedrally coordinated Mo transforms into tetrahedrally coordinated Mo , which has a close relationship with the catalytic activity.

Keywords： coke oven gas     water gas shift reaction     sulfur-tolerant catalyst     cerium dioxide    

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Halide-free carbonylation of methanol with H-MOR supported CuCeO

Chaoli Tong, Jiachang Zuo, Danlu Wen, Weikun Chen, Linmin Ye, Youzhu Yuan

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1075-1087 doi: 10.1007/s11705-020-2019-5

Abstract: Heterogeneous halide-free carbonylation of methanol to acetates, including methyl acetate (MA) and acetic acid, using non-precious metal catalysts has been a topic of interest for decades. The key issue is that the water produced by methanol dehydration inhibits the formation of acetyl species and reduces the MA selectivity. Here, we report that CuCeO /H-mordenite (H-MOR) catalyst can nearly eliminate the inhibiting effect of water on carbonylation by a water-gas shift reaction (WGSR) on-site, and can thus achieve 96.5% methanol conversion with 87.4% MA selectivity for the halide-free carbonylation of methanol. The results of powder X-ray diffraction, transmission electron microscopy, and scanning electron microscopy show that the Cu and Ce species are highly dispersed on H-MOR even when the CuCeO contents are as high as 29 wt-%. Fourier transform infrared spectroscopy and CO chemisorption analysis reveal that a small portion of Cu species can migrate into the channel of H-MOR when CuCeO /H-MOR is calcined at 500 °C and these Cu species are converted into Cu sites upon reduction. The Cu sites facilitate the WGSR and are also active sites for methanol carbonylation. The introduction of Ce benefits the inhibition of coke deposits and thus enhances the catalyst stability.

Keywords： methanol carbonylation     halide-free     methyl acetate     H-mordenite     copper and cerium oxide    

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Title Author Date Type Operation

Inhibition of bromate formation by reduced graphene oxide supported cerium dioxide during ozonation of

Bei Ye, Zhuo Chen, Xinzheng Li, Jianan Liu, Qianyuan Wu, Cheng Yang, Hongying Hu, Ronghe Wang

Journal Article

Plasma-electrochemical synthesis of europium doped cerium oxide nanoparticles

Liangliang Lin, Xintong Ma, Sirui Li, Marly Wouters, Volker Hessel

Journal Article

Catalytic activity of cerium-doped Ru/AlO during ozonation of dimethyl phthalate

ZHOU Yunrui, ZHU Wanpeng, CHEN Xun

Journal Article

Reduction of CeO

Elena Yu. KONYSHEVA

Journal Article

Reductive amination of -hexanol to -hexylamine over Ni–Ce/-AlO catalysts

Journal Article

Pressure drop analysis on the positive half-cell of a cerium redox flow battery using computational fluid

Fernando F. Rivera, Berenice Miranda-Alcántara, Germán Orozco, Carlos Ponce de León, Luis F. Arenas

Journal Article

Removal and recovery of toxic nanosized Cerium Oxide using eco-friendly Iron Oxide Nanoparticles

Kanha Gupta, Nitin Khandelwal, Gopala Krishna Darbha

Journal Article

Synthesis of ordered cerium-doped cubic mesoporous silica using long-chain ionic liquid as template

YUE Hongxia, ZHAO Hongmei, LIU Longjiang, WANG Siping, Ruan Qiong, WANG Tongwen

Journal Article

Catalytic performance of Co-Mo-Ce-K/γ-Al

Yuqiong ZHAO, Yongfa ZHANG

Journal Article

Halide-free carbonylation of methanol with H-MOR supported CuCeO

Chaoli Tong, Jiachang Zuo, Danlu Wen, Weikun Chen, Linmin Ye, Youzhu Yuan

Journal Article