Dragos Ciuparu

Catalytic growth of nanotubes;Application of palladium based catalysts for alkane aromatization, methane combustion and engine exhaust gas treatment.

Universitatea Petrol - Gaze Ploiesti, Ploiesti, .

E-mail: trimite un mesaj.

Nascut(a) in: 1967

Interese: Cataliza eterogena, Sinteza nanomaterialelor, Combustie catalitica

Detalii:
Visiting Professor,
Department of Chemical Engineering,
Yale University

Realizari in cercetare:
- prima sinteza a nanotuburilor de bor pur cu un singur perete;
- mecanismul de formare a clusterilor subnanometrici de Co in catalizatori de Co-MCM-41;
- sinteza nanotuburilor de carbon cu un singur perete avind o distributie ingusta a diametrelor;
- mecanismul prin care apa inhiba reactia de combustie a metanului pe catalizatori de PdO.

Details:
Catalytic growth of nanotubes;
Application of palladium based catalysts for alkane aromatization, methane combustion and engine exhaust gas treatment.

Publicații selectate:

* Ruxanda, G., Stancu, M., Vizireanu, S., Dinescu, G., Ciuparu, D., Varieties of carbon nanostructures obtained by the AC arc discharge method, JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, 10(8), 2008.

* Yuan Chen, Li Wei, Bo Wang, Sangyun Lim, Dragos Ciuparu, Ming Zheng, Jia Chen, Codruta Zoican, Yanhui Yang. Gary L. Haller, Lisa D. Pfefferle, Low-Defect, Purified, Narrowly (n,m)-Dispersed Single-Walled Carbon Nanotubes Grown from Cobalt-Incorporated MCM-41, ACS Nano, 1(4), 2007.

* Y. Chen, B. Wang, L.-J. Lib, Y. Yang, D. Ciuparu, S. Lim, G.L. Haller, L.D. Pfefferle, Effect of different carbon sources on the growth of single-walled carbon nanotube from MCM-41 containing nickel, Carbon, 45(11), 2007.

* Dragos Ciuparu, Alain Ensuquea, François Bozon-Verduraz, Pd catalysts supported on MgO, ZrO2 or MgO-ZrO2: Preparation, characterization and study in hexane conversion, Applied Catalysis A: General, 326(2), 2007.

* Sangyun Lim, Chuan Wang, Yanhui Yang, Dragos Ciuparu, Lisa Pfefferlea, Gary L. Haller, Evidence for anchoring and partial occlusion of metallic clusters on the pore walls of MCM-41 and effect on the stability of the metallic clusters, Catalysis Today, 123, 2007.

* S. Lim, D. Ciuparu, Y. Yangc, G. Du, L.D. Pfefferle, G.L. Haller, Improved synthesis of highly ordered Co-MCM-41, Microporous and Mesoporous Materials, 101, 2007.

* Yanhui Yang, Sangyun Lim, Guoan Du, Chuan Wang, Dragos Ciuparu, Yuan Chen, and Gary L. Haller, Controlling of Physicochemical Properties of Nickel-Substituted MCM-41 by Adjustment of the Synthesis Solution pH and Tetramethylammonium Silicate Concentration, J. Phys. Chem. B, 110(12), 2006.

* Y. Chen, D. Ciuparu, S. Lim, G.L. Haller, L.D. Pfefferle, The effect of the cobalt loading on the growth of single wall carbon nanotubes by CO disproportionation on Co-MCM-41 catalysts, Carbon, 44(1), 2006.

* D. Ciuparu, P. Haider, M. Fernández-García, Y. Chen, S. Lim, G.L. Haller, L. Pfefferle, X-ray Absorption Spectroscopic Investigation of Partially Reduced Cobalt Species in Co-MCM-41 Catalysts during Synthesis of Single-Wall Carbon Nanotubes, Journal of Physical Chemistry B, 109(34), 2005.

* Haider, P.; Haller, G.L.; Pfefferle, L.; Ciuparu, D, New Approach to Avoid Erroneous Interpretation of Results Derived from Generalized Two-Dimensional Correlation Analysis for Applications in Catalysis, Applied Spectroscopy, 59(8), 2005.

* Y. Yang, S. Lim, G. Du, Y. Chen, D. Ciuparu, G.L. Haller, Synthesis and Characterization of Highly Ordered Ni-MCM-41 Mesoporous Molecular Sieves, Journal of Physical Chemistry B, 109(27), 2005.

* P.B. Amama, S. Lim, D. Ciuparu, L. Pfefferle and G.L. Haller, Hydrothermal synthesis of MCM-41 using different ratios of colloidal and soluble silica, Microporous and Mesoporous Materials, 81(1-3), 2005.

* Y. Chen, D. Ciuparu, Y. Yang, S. Lim, C. Wang, G. L Haller, L. D Pfefferle, Single-wall carbon nanotube synthesis by CO disproportionation on nickel-incorporated MCM-41, Nanotechnology, 16(7), 2005.

* S. Lim, Y. Yang, D. Ciuparu, C. Wang, Y. Chen, L. Pfefferle and G.L. Haller, The effect of synthesis solution pH on the physicochemical properties of Co substituted MCM-41, Topics in Catalysis, 34(1-4), 2005.

* M. Gherasimova, J. Su, G. Cui, Z.-Y. Ren, S.-R. Jeon, J. Han, Y. He, Y.-K. Song, A. V. Nurmikko, D. Ciuparu, L. Pfefferle, A nanocluster route to zero- and one-dimensional quantum structures by MOCVD, Physica Status Solidi (c), 2(7), 2005.

* Yan Li, Yuan Chen, Rong Xiang, Dragos Ciuparu, Lisa D. Pfefferle, Csaba Horvath, and James A. Wilkins, Incorporation of Single-Wall Carbon Nanotubes into an Organic Polymer Monolithic Stationary Phase for -HPLC and Capillary Electrochromatography, Analytical Chemistry, 77(5), 2005.

* Placidus B. Amama, Sangyun Lim, Dragos Ciuparu, Yanhui Yang, Lisa Pfefferle, Gary L. Haller, Synthesis, Characterization, and Stability of Fe-MCM-41 for Production of Carbon Nanotubes by Acetylene Pyrolysis, Journal of Physical Chemistry B, 109(7), 2005.

* Sangyun Lim, Dragos Ciuparu, Yuan Chen, Yanhui Yang, Lisa Pfefferle, and Gary L. Haller, Pore Curvature Effect on the Stability of Co-MCM-41 and the Formation of Size-Controllable Subnanometer Co Clusters, Journal of Physical Chemistry B, 109(6), 2005.

* Peter Haider, Yuan Chen, Sangyun Lim, Gary L. Haller, Lisa Pfefferle, and Dragos Ciuparu, Application of the Generalized 2D Correlation Analysis to Dynamic Near-Edge X-ray Absorption Spectroscopy Data, Journal of the American Chemical Society, 127(6), 2005.

* Sangyun Lim, Dragos Ciuparu, Yuan Chen, Lisa Pfefferle, and Gary L. Haller, Effect of Co-MCM-41 Conversion to Cobalt Silicate for Catalytic Growth of Single Wall Carbon Nanotubes, Journal of Physical Chemistry B, 108, 2004.

* J. Su, G. Cui, M. Gherasimova, H. Tsukamoto, J. Han, D. Ciuparu, S. Lim, L. Pfefferle, Y. He, A. V. Nurmikko, C. Broadbridge, A. Lehman, Catalytic growth of group III-nitride nanowires and nanostructures by metalorganic chemical vapor deposition, Applied Physics Letters, 86(1), 2005.

* Dragos Ciuparu, Yuan Chen, Sangyun Lim, Yanhui Yang, Gary L. Haller, and Lisa Pfefferle, Mechanism of Cobalt Cluster Size Control in Co-MCM-41 during Single-Wall Carbon Nanotubes Synthesis by CO Disproportionation, Journal of Physical Chemistry B, 108, 2004.

* Yuan Chen, Dragos Ciuparu, Sangyun Lim, Yanhui Yang, Gary L. Haller and Lisa Pfefferle, Synthesis of uniform diameter single wall carbon nanotubes in Co-MCM-41: effects of CO pressure and reaction time, Journal of Catalysis, 226(2), 2004.

* R. F. Klie, D. Ciuparu, L. Pfefferle and Y. Zhu, Multi-walled carbon nanotubes on amorphous carbon films, Carbon, 42(10), 2004.

* Yuan Chen, Dragos Ciuparu, Sangyun Lim, Yanhui Yang, Gary L. Haller and Lisa Pfefferle, Synthesis of uniform diameter single wall carbon nanotubes in Co-MCM-41: Effects of the catalyst pre-reduction and nanotube growth temperatures, Journal of Catalysis, 225(2), 2004.

* Dragos Ciuparu, Emily Perkins and Lisa Pfefferle, In situ DR-FTIR investigation of surface hydroxyls on gamma-Al2O3 supported PdO catalysts during methane combustion, Applied Catalysis A: General, 263(2), 2004.

* Dragos Ciuparu, Robert F. Klie, Yimei Zhu, Lisa Pfefferle, Synthesis of Single Wall Pure Boron Nanotubes, Journal of Physical Chemistry B, 108(13), 2004.

* Ciuparu Dragos, Chen Yuan, Lim Sangyun, Haller Gary, Pfefferle Lisa, Uniform-Diameter Single-Walled Carbon Nanotubes Catalytically Grown in Cobalt-Incorporated MCM-41, Journal of Physical Chemistry B, 108(2), 2004.

* Dragos Ciuparu, Maxim R. Lyubovsky, Eric Altman, Lisa D. Pfefferle, Abhaya Datye, Catalytic combustion of methane over palladium-based catalysts, Catalysis Reviews, 44, 2002.

* Dragos Ciuparu, Lisa Pfefferle, Contributions of lattice oxygen to the overall oxygen balance during methane combustion over PdO-based catalysts, Catalysis Today, 77, 2002.

* Ciuparu, D., Bozon-Verduraz, F., Pfefferle, L.,, Oxygen exchange between palladium and oxide supports in combustion catalysts, Journal of Physical Chemistry B, 106(14), 2002.

* Brayner R, Ciuparu D, da Cruz GM, et al., Preparation and characterization of high surface area niobia, ceria-niobia and ceria-zirconia, Catalysis Today, 57, 2000.

* Ciuparu D, Altman E, Pfefferle L, Contributions of lattice oxygen in methane combustion over PdO-based catalysts, Journal of Catalysis, 203, 2001.

* Ciuparu, D., Pfefferle, L., Methane combustion activity of supported palladium catalysts after partial reduction, Applied Catalysis A: General, 218, 2001.

* Ciuparu, D., Katsikis, N., Pfefferle, L., Temperature and time dependence of the water inhibition effect on supported palladium catalyst for methane combustion, Applied Catalysis A: General, 216, 2001.

* Ciuparu, D., Ensuque, A., Shafeev, G., Bozon-Verduraz, F., Synthesis and apparent bandgap of nanophase zirconia, Journal of Materials Science Letters, 19, 2000.

* Ciuparu D, Pfefferle L, Support and water effects on palladium based methane combustion catalysts, Applied Catalysis A: General, 209, 2001.

* Ciuparu, D., Bensalem, A., Pfefferle, L., Pd-Ce interactions and adsorption properties of palladium: CO and NO TPD studies over Pd–Ce/Al2O3 catalysts, Applied Catalysis B: Environmental, 26, 2000.