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Dragos Ciuparu

Universitatea Petrol - Gaze Ploiesti, Ploiesti, România

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Născut(ă) în 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.

Publicații relevante:
• 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), pp. 2047-2051, 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), pp. 327-336, 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), pp. 2217-2228, 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), p. 130, 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, pp. 122-132, 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, pp. 200-206, 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), pp. 5927 -5935, 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), pp. 67-78, 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), pp. 16332-39, 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), pp. 1060-1067, 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), pp. 13237 - 46, 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), pp. 191-200, 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), pp. S476-S483, 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), pp. 31-40, 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), pp. 2361-2364, 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), pp. 1398-1406, 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), pp. 2645 -2656, 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), pp. 2285 - 229, 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), pp. 1906 -1912, 2005.
• 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.
• 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, pp. 20095 - 20, 2004.
• 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, p. 15565, 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), pp. 351-362, 2004.
• R. F. Klie, D. Ciuparu, L. Pfefferle and Y. Zhu. Multi-walled carbon nanotubes on amorphous carbon films. Carbon, 42(10), pp. 1953-1957, 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), pp. 453-465, 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), pp. 145-153, 2004.
• Dragos Ciuparu, Robert F. Klie, Yimei Zhu, Lisa Pfefferle. Synthesis of Single Wall Pure Boron Nanotubes. Journal of Physical Chemistry B, 108(13), pp. 3967-3969, 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), pp. 503-507, 2004.
• Dragos Ciuparu, Maxim R. Lyubovsky, Eric Altman, Lisa D. Pfefferle, Abhaya Datye. Catalytic combustion of methane over palladium-based catalysts. Catalysis Reviews, 44, pp. 591-647, 2002.
• Dragos Ciuparu, Lisa Pfefferle. Contributions of lattice oxygen to the overall oxygen balance during methane combustion over PdO-based catalysts. Catalysis Today, 77, pp. 167-179, 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.
• Ciuparu D, Altman E, Pfefferle L. Contributions of lattice oxygen in methane combustion over PdO-based catalysts. Journal of Catalysis, 203, pp. 64-74, 2001.
• Ciuparu, D., Pfefferle, L. . Methane combustion activity of supported palladium catalysts after partial reduction. Applied Catalysis A: General, 218, pp. 197-209, 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, pp. 209 - 215, 2001.
• Ciuparu D, Pfefferle L. Support and water effects on palladium based methane combustion catalysts. Applied Catalysis A: General, 209, pp. 415 - 428, 2001.
• 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, pp. 261-266, 2000.
• Ciuparu, D., Ensuque, A., Shafeev, G., Bozon-Verduraz, F. . Synthesis and apparent bandgap of nanophase zirconia. Journal of Materials Science Letters, 19, pp. 931-933, 2000.
• 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, pp. 241-255, 2000.


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