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Catalytic oxidation of carbon monoxide, toluene, and ethyl acetate over the

Zhidan Fu, Lisha Liu, Yong Song, Qing Ye, Shuiyuan Cheng, Tianfang Kang, Hongxing Dai

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 2,   Pages 185-196 doi: 10.1007/s11705-017-1631-5

Abstract: The Pd catalyst supported on cryptomelane-type manganese oxide octahedral molecular sieve (OMS-2) were

Keywords： cryptomelane-type manganese oxide octahedral molecular sieve     oxygen mobility     reducibility     carbon monoxide    

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Preparation of lithium ion-sieve and utilizing in recovery of lithium from seawater

Lu WANG, Changgong MENG, Wei MA

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 1,   Pages 65-67 doi: 10.1007/s11705-009-0105-9

Abstract: Among the adsorbents for lithium, the ion-sieve is a kind of special absorbent which has high selectivityfor Li , especially the spinel manganese oxides (SMO), which among the series of ion-sieves, has becomeIn this study, the SMO ion-sieve was prepared by a coprecipitation method.Recovery of Li from seawater were studied in batch experiments using prepared ion-sieve, and the effect

Keywords： lithium     ion-sieve     seawater     spinel manganese oxide    

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Chemical composition and formation mechanisms in the cathode-electrolyte interface layer of lithium manganeseoxide batteries from reactive force field (ReaxFF) based molecular dynamics

Sahithya REDDIVARI, Christian LASTOSKIE, Ruofei WU, Junliang ZHANG

Frontiers in Energy 2017, Volume 11, Issue 3,   Pages 365-373 doi: 10.1007/s11708-017-0500-8

Abstract: Lithium manganese oxide (LiMn O ) is a principal cathode material for high power and high energy densitycell containing LiMn O ages, suggesting that active material loss by dissolution of divalent manganeseTo improve the retention of manganese in the active material, it is key to understand the reactions thatTo bridge this knowledge gap, reactive force field (ReaxFF) based molecular dynamics was applied to investigateAn overall cathode-electrolyte interface reaction scheme is proposed based on the molecular simulation

Keywords： lithium manganese oxide batteries     reactive force field (ReaxFF)     cathode-electrolyte interface layer     molecular    

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Catalytic activity of manganese oxide supported on alumina in the synthesis of quinoxalines

Rekha M., H. Kathyayini, N. Nagaraju

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 4,   Pages 415-421 doi: 10.1007/s11705-013-1360-3

Abstract: Two catalysts, alumina and manganese oxide supported on alumina, have been prepared by calcination and

Keywords： alumina     manganese oxide deposited on alumina     quinoxaline synthesis    

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Preparation and characterization of novel carbon molecular sieve membrane/PSSF composite by pyrolysis

Ying Yan, Peng Huang, Huiping Zhang

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 4,   Pages 772-783 doi: 10.1007/s11705-019-1827-y

Abstract: Carbon molecular sieve membrane (CMSM)/paper-like stainless steel fibers (PSSF) has been manufactured

Keywords： carbon molecular sieve membrane     stainless steel fibers     pyrolysis     structured fixed bed     toluene    

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Interlayer-confined two-dimensional manganese oxide-carbon nanotube catalytic ozonation membrane for

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 5,   Pages 731-744 doi: 10.1007/s11705-021-2110-6

Abstract: Catalytic ozonation technology has attracted copious attention in water purification owing to its favorable oxidative degradation of pollutants and mitigation of membrane fouling capacity. However, its extensive industrial application has been restricted by the low ozone utilization and limited mass transfer of the short-lived radical species. Interlayer space-confined catalysis has been theoretically proven to be a viable strategy for achieving high catalytic efficiency. Here, a two-dimensional MnO2-incorporated ceramic membrane with tunable interspacing, which was obtained via the intercalation of a carbon nanotube, was designed as a catalytic ozonation membrane reactor for degrading methylene blue. Benefiting from the abundant catalytic active sites on the surface of two-dimensional MnO2 as well as the ultralow mass transfer resistance of fluids due to the nanolayer confinement, an excellent mineralization effect, i.e., 1.2 mg O3(aq) mg–1 TOC removal (a total organic carbon removal rate of 71.5%), was achieved within a hydraulic retention time of 0.045 s of pollutant degradation. Further, the effects of hydraulic retention time and interlayer spacing on methylene blue removal were investigated. Moreover, the mechanism of the catalytic ozonation employing catalytic ozonation membrane was proposed based on the contribution of the Mn(III/IV) redox pair to electron transfer to generate the reactive oxygen species. This innovative two-dimensional confinement catalytic ozonation membrane could act as a nanoreactor and separator to efficiently oxidize organic pollutants and enhance the control of membrane fouling during water purification.

Keywords： catalytic membrane reactor     catalytic ozonation     nanoconfinement     two-dimensional manganese oxide    

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Thermal decomposition of poly(ethylene terephthalate)/mesoporous molecular sieve composites

RUN Mingtao, ZHANG Dayu, WU Sizhu, WU Gang

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 1,   Pages 50-54 doi: 10.1007/s11705-007-0010-z

Abstract: The nonisothermal and isothermal degradation processes of poly (ethylene terephthalate)/mesoporous molecularsieve (PET/MMS) composites synthesized by in-situ polymerization were studied by using thermogravimetric

Keywords： polymerization     isothermal degradation     conversion     nonisothermal degradation     activation    

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Simultaneous enhanced ammonia and nitrate removal from secondary effluent in constructed wetlands using a new manganese-containing

Frontiers of Environmental Science & Engineering 2023, Volume 18, Issue 4, doi: 10.1007/s11783-024-1807-4

Abstract:

● MnO2/PCL composite material (MPCM) enhances ammonia and nitrate removal in CWs.

Keywords： Constructed wetland     Nitrogen removal     Manganese redox     Polycaprolactone     Nitrous oxide    

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Adsorptive behaviors of humic acid onto freshly prepared hydrous manganese dioxides

LIU Ruiping, LI Guibai, YANG Yanling, HE Wenjie, HAN Hongda

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 2,   Pages 240-245 doi: 10.1007/s11783-007-0041-1

Abstract: Effects of such parameters as molecular mass of humic acid, kinds of divalent cations on adsorptive behaviorsThis study indicated that humic acid with higher molecular mass exhibited more tendency of adsorbingonto &MnO than that with lower molecular mass.

Keywords： Mg     molecular     functional     UV-Vis spectra     prepared hydrous    

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Ti incorporation in MCM-41 mesoporous molecular sieves using hydrothermal synthesis

Shengping WANG, Changqing MA, Yun SHI, Xinbin MA

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 1,   Pages 95-103 doi: 10.1007/s11705-014-1405-2

Abstract: Titanium-containing mesoporous materials (Ti-MCM-41) were obtained by hydrothermal synthesis. Such materials are active catalysts for the transesterification of dimethyl oxalate and phenol to produce diphenyl oxalate. To understand the role of the Ti in the catalytic process, Ti-MCM-41 samples with different Si/Ti ratios (from 5 to 100) were prepared and the samples were analyzed by Fourier transform infrared spectroscopy, UV-visible spectroscopy, and ammonia temperature programmed desorption. It was concluded that the Ti is incorporated into the framework of the MCM-41 and formed weak Lewis acid sites. In addition, the number of Ti(IV) sites increased as the amount of titanium increased. X-ray powder diffraction, N adsorption-desorption and transmission electron microscopy results showed that the Ti-MCM-41 samples have a hexagonal arrangement of mono-dimensional pores. A large number of Ti(IV) sites coupled with the mesoporous structure and large pore diameters are favorable for the transesterification catalytic properties of Ti-MCM-41.

Keywords： Ti-MCM-41     mesoporous molecular sieve     acid sites     transesterification     hydrothermal synthesis    

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Comparing the adsorption behaviors of Cd, Cu and Pb from water onto Fe-Mn binary oxide, MnO

Wei XU,Huachun LAN,Hongjie WANG,Hongming LIU,Jiuhui QU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 3,   Pages 385-393 doi: 10.1007/s11783-014-0648-y

Abstract: The adsorption potential of FMBO, FeOOH, MnO for the removal of Cd , Cu and Pb in aqueous systems was investigated in this study. Comparing to FMBO and FeOOH, MnO offered a much higher removal capacity towards the three metal ions. The maximal adsorption capacity of MnO for Cd , Cu and Pb were 1.23, 2.25 and 2.60 mmol·g , respectively. And that for FMBO were 0.37, 1.13, and 1.18 mmol·g and for FeOOH were 0.11, 0.86 and 0.48 mmol·g , respectively. The adsorption behaviors of the three metal ions on the three adsorbents were all significantly affected by pH values and heavy metal removal efficiency increased with pH increased. The Langmuir and Freundlich adsorption models were used to describe the adsorption equilibrium of the three metal ions onto the three adsorbents. Results showed that the adsorption equilibrium data fitted well to Langmuir isotherm and this indicated that adsorption of metal ions occurred on the three metal oxides adsorbents limited to the formation of a monolayer. More negative charged of MnO surface than that of FMBO and FeOOH could be ascribed by lower pH of MnO than that of FMBO and FeOOH and this could contribute to more binding sites on MnO surface than that of FMBO and FeOOH. The higher metal ions uptake by MnO than FMBO and FeOOH could be well explained by the surface charge mechanism.

Keywords： heavy metals     Fe-Mn binary oxide     manganese dioxide     ferric hydroxide     adsorption    

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Synthesis and application of superparamagnetic iron oxide nanoparticles in targeted therapy and imaging

Liangqian Tong, Ming Zhao, Shu Zhu, Jing Chen

Frontiers of Medicine 2011, Volume 5, Issue 4,   Pages 379-387 doi: 10.1007/s11684-011-0162-6

Abstract: Superparamagnetic iron oxide (SPIO) nanoparticles have become a popular strategy of cancer treatmentand molecular imaging because of their versatile properties and biocompatibility.

Keywords： nanoparticles     superparamagnetic iron oxide     targeted therapy     molecular imaging     cancer    

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Efficient base-free oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid over copper-doped manganeseoxide nanorods with

Feng Cheng, Dongwen Guo, Jinhua Lai, Meihui Long, Wenguang Zhao, Xianxiang Liu, Dulin Yin

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 4,   Pages 960-968 doi: 10.1007/s11705-020-1999-5

Abstract: 2,5-Furandicarboxylic acid (FDCA) is an important and renewable building block and can serve as an alternative to terephthalic acid in the production of bio-based degradable plastic. In this study, Cu-doped MnO  nanorods were prepared by a facile hydrothermal redox method and employed as catalysts for the selective oxidation of 5-hydroxymethylfurfural (HMF) to FDCA using -butyl hydroperoxide (TBHP) as an oxidant. The catalysts were characterized using X-ray diffraction analysis, Fourier transform infrared spectroscopy, thermogravimetric analysis, and transmission electron microscopy. The effects of oxidants, solvents, and reaction conditions on the oxidation of HMF were investigated, and a reaction mechanism was proposed. Experimental results demonstrated that 99.4% conversion of HMF and 96.3% selectivity of FDCA were obtained under suitable conditions, and -butanol was the most suitable solvent when TBHP was used as an oxidant. More importantly, the Cu-doped MnO catalyst can maintain durable catalytic activity after being recycled for more than ten times.

Keywords： 5-hydroxymethylfurfural     25-furandicarboxylic acid     selective oxidation     Cu-doped MnO2     biomass transformation    

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Theoretical study on Janus graphene oxide membrane for water transport

Quan Liu, Mingqiang Chen, Yangyang Mao, Gongping Liu

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 4,   Pages 913-921 doi: 10.1007/s11705-020-1954-5

Abstract: Graphene oxide (GO) membranes have received considerable attention owing to their outstanding water-permeationIn this study, we performed molecular simulations to explore the permeation of a water–ethanol mixtureusing a new type of Janus GO membranes with different orientations of oxidized and pristine surfaces

Keywords： graphene oxide membrane     molecular dynamics simulation     water permeation     water-ethanol separation     oxidized    

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Oxidation-extraction desulfurization of model oil over Zr-ZSM-5/SBA-15 and kinetic study

Chuanzhu LU,Hui FU,Huipeng LI,Hua ZHAO,Tianfeng CAI

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 2,   Pages 203-211 doi: 10.1007/s11705-014-1420-3

Abstract: ZSM-5/SBA-15 composite molecular sieves were synthesized using post-synthesis method and characterized

Keywords： composite molecular sieve     oxidation desulfuration     extraction     kinetic    

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Title Author Date Type Operation

Catalytic oxidation of carbon monoxide, toluene, and ethyl acetate over the

Zhidan Fu, Lisha Liu, Yong Song, Qing Ye, Shuiyuan Cheng, Tianfang Kang, Hongxing Dai

Journal Article

Preparation of lithium ion-sieve and utilizing in recovery of lithium from seawater

Lu WANG, Changgong MENG, Wei MA

Journal Article

Chemical composition and formation mechanisms in the cathode-electrolyte interface layer of lithium manganeseoxide batteries from reactive force field (ReaxFF) based molecular dynamics

Sahithya REDDIVARI, Christian LASTOSKIE, Ruofei WU, Junliang ZHANG

Journal Article

Catalytic activity of manganese oxide supported on alumina in the synthesis of quinoxalines

Rekha M., H. Kathyayini, N. Nagaraju

Journal Article

Preparation and characterization of novel carbon molecular sieve membrane/PSSF composite by pyrolysis

Ying Yan, Peng Huang, Huiping Zhang

Journal Article

Interlayer-confined two-dimensional manganese oxide-carbon nanotube catalytic ozonation membrane for

Journal Article

Thermal decomposition of poly(ethylene terephthalate)/mesoporous molecular sieve composites

RUN Mingtao, ZHANG Dayu, WU Sizhu, WU Gang

Journal Article

Simultaneous enhanced ammonia and nitrate removal from secondary effluent in constructed wetlands using a new manganese-containing

Journal Article

Adsorptive behaviors of humic acid onto freshly prepared hydrous manganese dioxides

LIU Ruiping, LI Guibai, YANG Yanling, HE Wenjie, HAN Hongda

Journal Article

Ti incorporation in MCM-41 mesoporous molecular sieves using hydrothermal synthesis

Shengping WANG, Changqing MA, Yun SHI, Xinbin MA

Journal Article

Comparing the adsorption behaviors of Cd, Cu and Pb from water onto Fe-Mn binary oxide, MnO

Wei XU,Huachun LAN,Hongjie WANG,Hongming LIU,Jiuhui QU

Journal Article

Synthesis and application of superparamagnetic iron oxide nanoparticles in targeted therapy and imaging

Liangqian Tong, Ming Zhao, Shu Zhu, Jing Chen

Journal Article

Efficient base-free oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid over copper-doped manganeseoxide nanorods with

Feng Cheng, Dongwen Guo, Jinhua Lai, Meihui Long, Wenguang Zhao, Xianxiang Liu, Dulin Yin

Journal Article

Theoretical study on Janus graphene oxide membrane for water transport

Quan Liu, Mingqiang Chen, Yangyang Mao, Gongping Liu

Journal Article

Oxidation-extraction desulfurization of model oil over Zr-ZSM-5/SBA-15 and kinetic study

Chuanzhu LU,Hui FU,Huipeng LI,Hua ZHAO,Tianfeng CAI

Journal Article