Thematische Bibliographien / Cu-MCM-41

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Auswahl der wissenschaftlichen Literatur zum Thema „Cu-MCM-41“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 9. Februar 2022

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Zeitschriftenartikel zum Thema "Cu-MCM-41"

Hachemaoui, Mohammed, Carmen B. Molina, Carolina Belver, et al. "Metal-Loaded Mesoporous MCM-41 for the Catalytic Wet Peroxide Oxidation (CWPO) of Acetaminophen." Catalysts 11, no. 2 (2021): 219. http://dx.doi.org/10.3390/catal11020219.

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MCM-41 based catalysts (molar ratio Si/Al = 40) were prepared by a hydrothermal route, modified by ionic exchange with different metals (Cu, Cr, Fe and Zn) and finally calcined at 550 °C. The catalysts were fully characterized by different techniques that confirmed the formation of oxides of the different metals on the surfaces of all materials. Low-angle X-ray diffraction (XRD) analyses showed that calcination resulted in the incorporation of metallic Zn, Fe and Cr in the framework of MCM-41, while in the case of Cu, thin layers of CuO were formed on the surface of MCM-41. The solids obtained

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Li, Guo Ru, Gong Li, Shu Xi Zhou, and Hui Juan Tong. "Catalytic Activity of Dehydrogenation of Methanol to MF over Cu/MCM-41 and Cu-ZnO/MCM-41 Prepared by Impregnation and Grinding." Advanced Materials Research 396-398 (November 2011): 730–33. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.730.

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Abstract. Using MCM-41 molecular sieves as the support, Cu-ZnO/MCM-41 and Cu/MCM-41 catalysts were prepared by impregnation and grinding. The catalysts were characterized by XRD, N2 adsorption-desorption and TPR methods. The catalytic activity of the dehydrogenation of methanol to methyl formate (MF) was evaluated using the flow microreactor under atmospheric pressure. According to the results, the catalyst prepared by impregnation had a better selectivity for the MF, but a lower methanol conversion rate. However, the product's selectivity could be improved by adding ZnO additive while the met

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Tran Thi, Hoa, Dung Le Van, Ha Le Hong, and Manh Nguyen Ba. "Synthesis of Fe-Cu/MCM-41 nanocomposite and its application for treatment of Reactive Red 195." Vietnam Journal of Catalysis and Adsorption 9, no. 2 (2020): 28–33. http://dx.doi.org/10.51316/jca.2020.025.

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A series of Fe-Cu/MCM-41 nanocomposites were synthesized by dispersion of Fe-Cu on mesoporous silica MCM-41 obtained from natri silicat. The physical properties of Fe-Cu/MCM-41 were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), x-ray photoelectron spectroscopy (XPS), N2 adsorption-desorption isotherm (BET) analysis. Effects of pH and H2O2 concentration were investigated. The best conditions were found to be pH of 3; 0.3 g.L−1 catalyst and reaction time of 60 min at room temperature. The novel Fe-Cu/MCM-41 composite exh

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Huang, Hsin Liang, H. Paul Wang, Y. L. Wei, and Tung Li Hsiung. "Chemical Structure of Nanosize Copper Wires in MCM-41." Advanced Materials Research 47-50 (June 2008): 1125–28. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.1125.

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X-ray absorption near edge structural (XANES) and X-ray absorption fine structural (EXAFS) spectroscopies have been used to study chemical structure of nanosize copper extracted in the channels of MCM-41. The component-fitted XANES spectra show that about 95% of copper are adsorbed on the surfaces of MCM-41 at 298 K. A small amount of nanosize CuO in MCM-41 is also found. The adsorbed copper (Cu(II)(ads)) in the channels of MCM-41 may be oxidized and form nanosize CuO as calcined at 573 and 923 K. By EXAFS, it is observed that the nanosize CuO in MCM-41 possesses a Cu-O bond distance of 1.97 Å

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Huang, De Xuan, Yi Bing Song, Yi Wen Fang, and Chang Yong Sun. "Synthesis and Characterization of Metal Salen Complexes Immobilized MCM-41 and their Catalytic Activity for Benzyl Alcohol Oxidation." Advanced Materials Research 881-883 (January 2014): 292–96. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.292.

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Co(Ⅱ)-, Mn(Ⅲ)- and Cu(Ⅱ)- salen type complexes were immobilized over mesoporous MCM-41 through coordinating the metal atom to amino groups covalently attached to the MCM-41 functionalized 3-aminopropyl triethoxysilane (3-APTES). The XRD patterns shown that mesostructure of MCM-41 remains intact after various modifications, while spectral techniques shown the successful anchoring the neat complexes inside MCM-41. The catalytic activity results shown that Co-salophen/MCM-41 exhibited the highest catalytic performance in the water phase selective oxidation of benzyl alcohol.

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Liu, Yingying, Lingjun Zhu, Shurong Wang, and Suneerat Fukuda. "Bio-MCM-41: a high-performance catalyst support derived from pyrolytic biochar." New Journal of Chemistry 42, no. 15 (2018): 12394–402. http://dx.doi.org/10.1039/c8nj01063c.

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Zhang, Guoying, Jinlin Long, Xuxu Wang, et al. "Controlled synthesis of pure and highly dispersive Cu(ii), Cu(i), and Cu(0)/MCM-41 with Cu[OCHMeCH2NMe2]2/MCM-41 as precursor." New Journal of Chemistry 33, no. 10 (2009): 2044. http://dx.doi.org/10.1039/b906352h.

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Wei, Li, Shengyong You, Yuxin Tuo, and Mingzhong Cai. "A Highly Efficient Heterogeneous Copper-Catalyzed Oxidative Cyclization of Benzylamines and 1,3-Dicarbonyl Compounds To Give Trisubstituted Oxazoles." Synthesis 51, no. 16 (2019): 3091–100. http://dx.doi.org/10.1055/s-0037-1610710.

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The heterogeneous copper-catalyzed cascade oxidative cyclization between benzylamines and 1,3-dicarbonyl compounds was achieved by using the 3-(2-aminoethylamino)propyl-functionalized MCM-41-immobilized copper(II) complex [MCM-41-2N-Cu(OAc)2] as catalyst and t-BuOOH (TBHP) as oxidant, with iodine as additive, under mild conditions, yielding a wide variety of 2,4,5-trisubstituted oxazoles in mostly good to excellent yields. This heterogeneous copper catalyst can be facilely prepared via a simple two-step procedure from readily available and inexpensive reagents and exhibits a slightly higher ac

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Rana, Surjyakanta, G. Bishwa Bidita Varadwaj, and Sreekanth B. Jonnalagadda. "Green Synthesis of Cu Nanoparticles in Modulating the Reactivity of Amine-Functionalized Composite Materials towards Cross-Coupling Reactions." Nanomaterials 11, no. 9 (2021): 2260. http://dx.doi.org/10.3390/nano11092260.

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Control over both dispersion and the particle size distribution of supported metal particles is of paramount importance for the catalytic activity of composite materials. We describe the synthesis of materials with Cu nanoparticles well-dispersed on different amine-functionalized supports, using the extract of Wallich Spurge as a green, reducing agent. Graphene oxide (GO), mesoporous silica (MCM-41), mesoporous zirconia, and reduced graphene oxide-mesoporous silica (RGO-MCM-41) were explored as supports. Cu nanoparticles were better stabilized on RGO-MCM-41 compared to other supports. The nove

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El-Yazeed, W. S. Abo, and Awad I. Ahmed. "Monometallic and bimetallic Cu–Ag MOF/MCM-41 composites: structural characterization and catalytic activity." RSC Advances 9, no. 33 (2019): 18803–13. http://dx.doi.org/10.1039/c9ra03310f.

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Dissertationen zum Thema "Cu-MCM-41"

Nalbant, Asli. "Synthesis And Characterization Of Cu-mcm-41 And Ni-mcm-41 Type Catalytic Materials." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/3/12605788/index.pdf.

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Discovery of mesoporous materials by Mobil researchers in 1992 opened a new field in catalytic applications. The materials designated as M41S family are MCM-41 with one-dimensional hexagonal structure, MCM-48 with three-dimensional cubic structure and MCM-51 with unstable lamellar structure. This family of materials have high surface areas up to 1500 m2/g, narrow pore size distributions with pore sizes varying from 20 to 100 &Aring . These materials can be activated by incorporation of metals or active compounds into their structures. In this study, copper and nickel incorporated MCM-41 typ

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Ozdogan, Ekin. "Steam Reforming Of Ethanol For Hydrogen Production Using Cu-mcm41 And Ni-mcm41 Type Mesoporous Catalytic Materials." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608680/index.pdf.

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The world&rsquo s being alerted to the global warming danger and the depletion of fossil fuel resources, has increased the importance of the clean and renewable hydrogen energy. Bioethanol has high potential to be used as a resource of hydrogen since it is a non-petroleum feedstock and it is able to produce hydrogen rich mixture by steam reforming reactions. Discovery of mesoporous MCM-41 type high surface area silicate-structured materials with narrow pore size distributions (20-100 &Aring ) and high surface areas (up to 1500 m2/g) opened a new avenue in catalysis research. Catalytic ac

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Bezerra, Linaldo Santos. "Avaliação dos sistemas catalíticos Cuo/Zno/Al2O3 e Cu-MCM-41 na oxidação catalítica do fenol em um reator de leito de lama." Universidade Federal da Bahia. Escola Politécnica, 2008. http://repositorio.ufba.br/ri/handle/ri/19519.

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Submitted by LIVIA FREITAS (livia.freitas@ufba.br) on 2016-06-09T18:15:12Z No. of bitstreams: 1 Dissertação PDF Final.pdf: 1897723 bytes, checksum: 8bb2194d26a88a95bf7f3cca86c215f0 (MD5) Approved for entry into archive by LIVIA FREITAS (livia.freitas@ufba.br) on 2016-06-20T14:53:30Z (GMT) No. of bitstreams: 1 Dissertação PDF Final.pdf: 1897723 bytes, checksum: 8bb2194d26a88a95bf7f3cca86c215f0 (MD5) Made available in DSpace on 2016-06-20T14:53:30Z (GMT). No. of bitstreams: 1 Dissertação PDF Final.pdf: 1897723 bytes, checksum: 8bb2194d26a88a95bf7f3cca86c215f0 (MD5) O crescimento industr

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Moraes, Guilherme Alves de. "ESTRUTURA CRISTALINA E MOLECULAR DE COMPLEXOS TRIAZENIDOS N-ÓXIDOS DE Cu(II), Ni(II) E Au(I) E ESTUDO DOS SEUS DERIVADOS IMOBILIZADOS EM MCM-41." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/7964.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Triazenes are a class of chemical compounds that presents three atoms of nitrogen bonded each other in sequence on a open chain. An analogue of these generics monocatenade Triazenes are Triazenes 1-oxide, used in many areas of chemistry, being targeted mainly in organic chemistry, analytical, medical, bioinorganic, coordination chemistry and catalysis recently. Was synthesized the free ligand 1-fenil-3-(4-Fluorophenil)Triazene N1-oxide (1) and from this, the complexes: bis[1-phenyl-3-(4-Fluorophenyl)triazene N1-oxide] Copper(II) (2

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Andreoli, Sara. "Preparazione e caratterizzazione di catalizzatori PdCu/MCM-41 e loro utilizzo nella reazione di idrodeclorurazione." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/6019/.

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La necessità di raggiungere la sostenibilità ambientale delle produzioni industriali rappresenta un motore di sviluppo per tecnologie impiantistiche innovative e nuove filosofie produttive. Ad esempio, la necessità di promuovere lo smaltimento dei clorofluorocarburi, causa i loro dimostrati effetti dannosi sullo strato di ozono stratosferico, ha promosso lo sviluppo di nuovi processi industriali[1]. In questo ambito ha acquisito sempre maggior importanza la reazione di idrodeclorurazione, in particolare, rivolta alla produzione di idrocarburi fluorurati insaturi che mostrino caratteristiche in

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Prati, Luca. "Sintesi e caratterizzazione di sistemi catalitici a base di pd-cu e loro utilizzo nella reazione di idrodeclorurazione di molecole clorofluorurate." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7317/.

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Questo lavoro di tesi ha avuto come obiettivo quello di individuare e studiare diverse strategie di sintesi per la preparazione di catalizzatori a base di Pd-Cu supportati su materiali mesoporosi a basi di SiO2. Queste strategie sono state mirate a migliorare: -Distribuzione della fase metallica attiva e la sua accessibilità; -Formazione della fase mista Pd-Cu; -Dimensione delle specie metalliche sulla superficie; -Differenti caratteristiche morfologiche del supporto. I diversi catalizzatori preparati sono stati poi testati sulla reazione di idrodeclorurazione del 1,2-dicloro-1,1,2-trifl

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Tsai, Chia Lung, and 蔡佳龍. "Synthesis of Novel Molecular Sieves and Studies on Catalytic Oxidation of Trimethylphenol over Cu,Al-MCM-41." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/11713136081488482950.

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Chen, Yu-Hung, and 陳禹宏. "Photodegradation of pesticides in water over TiO2-containing catalysts and the coordination environment of Cu(II) substituted in MCM-41 studied by In-Situ X-ray absorption spectroscopy." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/37453376417672388379.

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碩士 國立臺灣大學 化學研究所 89 TiO2 has been utilized as the photocatalyst in degradation of various organic compounds. The photodegradation of pesticides such as carbofuran and methomyl was investigated. The reactant conversion and CO2 yield were used to describe the photodecomposition behaviors. The photodegradation efficiency was greatly influenced by the crystal size and surface area of TiO2 and different preparation methods. Supporting TiO2 particles on porous materials such as zeolites and molecular sieves increased the surface area of photocatalysts. Another effective method to improve

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Buchteile zum Thema "Cu-MCM-41"

Sriprom, Pongsert, Chitsan Lin, Arthit Neramittagapong, and Sutasinee Neramittagapong. "Investigation of Important Parameters for Lignin Degradation Using Fenton-Like Reaction via Cu Doped on Bagasses-MCM-41." In Springer Proceedings in Physics. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-26324-3_9.

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Ferraris, Giovanni, Giuliano Moretti, Giuseppe Fierro, and Mariano Lo Jacono. "Structural properties of Cu-MCM-41 and Cu-Al-MCM-41(Si/Al=30) catalysts." In Characterization of Porous Solids VI, Proceedings of the 6th International Symposium on the Characterization of Porous Solids (COPS-VI). Elsevier, 2002. http://dx.doi.org/10.1016/s0167-2991(02)80183-5.

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Wu, Z. Y., Y. M. Wang, and J. H. Zhu. "Direct synthesis of Cu-modified MCM-41 functional materials." In Nanoporous Materials IV, Proceedings of the 4th International Symposium on Nanoporous Materials. Elsevier, 2005. http://dx.doi.org/10.1016/s0167-2991(05)80200-9.

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Broyer, M., J. P. Bellat, O. Heintz, C. Paulin, S. Valange, and Z. Gabelica. "Characterization of [Cu]-MCM-41 by XPS and CO or NO adsorption heat measurements." In Studies in Surface Science and Catalysis. Elsevier, 2002. http://dx.doi.org/10.1016/s0167-2991(02)80268-3.

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Ddeěek, J., N. Zilková, and J. Cejka. "Siting of Co(II), Zn(II) and Cu(i) ions in (A1)MCM-41." In Nanoporous Materials II, Proceedings of the 2nd Conference on Access in Nanoporous Materials. Elsevier, 2000. http://dx.doi.org/10.1016/s0167-2991(00)80219-0.

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Ziolek, M., I. Nowak, I. Sobczak, A. Lewandowska, P. Decyk, and J. Kujawa. "Physico-chemical and catalytic properties of MCM-41 mesoporous molecular sieves containing transition metals (Cu, Ni, and Nb)." In Nanoporous Materials II, Proceedings of the 2nd Conference on Access in Nanoporous Materials. Elsevier, 2000. http://dx.doi.org/10.1016/s0167-2991(00)80287-6.

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Ziolek, M., I. Sobczak, I. Nowak, P. Decyk, and J. Stoch. "07-O-04 - A comparative study of Cu interaction with niobium-and aluminium-containing MCM-41 molecular sieves." In Studies in Surface Science and Catalysis. Elsevier, 2001. http://dx.doi.org/10.1016/s0167-2991(01)81247-7.

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Konferenzberichte zum Thema "Cu-MCM-41"

Sangok, Faustina E., Nor F. Rasaruddin, Sabrina M. Yahaya, Nurul I. Taib, and Siti Z. Sa'ad. "Comparison study of Cu (II) adsorption by using aminopropyl and vinyl functionalized MCM-41." In 2012 IEEE Symposium on Business, Engineering and Industrial Applications (ISBEIA). IEEE, 2012. http://dx.doi.org/10.1109/isbeia.2012.6422932.

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