Title of the Project:

NEW NANOSTRUCTURED SEMICONDUCTING OXIDE MATERIALS FOR CATALYTIC COMBUSTION OF SOME GASES IN REDUCED CONCENTRATIONS

Project Code: PN-II-ID-PCE-2011-3-0453

Contract No. 295/05.10.2011

 

Project Manager: Prof. Dr. Nicolae Rezlescu

 

Summary of the project

Classical industrial procedures use as catalysts for gas combustion noble metals with nanometric structure dispersed in a support medium. However, these materials are prohibitively expensive, making the discovery of affordable alternatives essential for industrial competitivity. Recent research has focused on employing oxide compounds, materials of high variety and low cost, as catalysts for combustion. There were presented compositions and preparation procedures for oxide compounds to be used for air purification and lowering the concentration of burnt gases from motor engines. The catalytic properties are determined both by the composition and the structure (particles size, specific area, porosity) of the compound. This project aims to investigate the catalytic properties of a number of new semiconducting oxide compounds, ferrites and perovskites, prepared by an original procedure selfcombustion. The procedure, recently patented by us, allows obtaining oxide compounds with precise composition, nanometric structure and controlled growth of crystals. We plan to identify catalytic compounds for combustion in air at moderate temperatures of a number of combustible gases and vapours in low concentrations. We will examine the influence on the catalytic properties of the compound structure and composition, the working temperature, and the gas concentration in air. The catalytic effect will be certified by the decrease in burnt gas concentration in the presence of the catalyst.

 

 

PLANNED ACTIVITIES and OBJECTIVES

2011

O1 Preparation of simple ferrites samples (AFe2O4)

O2 Investigation of the simple ferrites samples

2012

O1 Prepararation of simple perovskites samples (ABO3)

O2 Investigation of the simple perovskites ferrites samples

O3 Making facilities for complex investigation of samples

2013

O1 Select simple perovskites with catalytic properties. Preparation of modified perovskite samples

O2 Complex investigation of the modified perovskite samples

2014

O1 Select simple ferrites with catalytic properties. Preparation of modified ferrite samples

O2 Complex investigation of the modified ferrite samples

2015

O1 Complex investigation on samples prepared from modified ferrites and perovskites

O2 Making a laboratory catalytic combustion plant for the materials with optimum catalytic properties

O3 Tests with laboratory catalytic combustion plant with different materials and number of gases 

 

Activity Report 2011-2014

 

 

Project Team

Nicolae Rezlescu - Ph.D in Physics, Senior Researcher 1 at INCDFT-IFT Iaşi / Specialist in the study of oxide semiconductor materials

Eveline Popovici - Ph.D. in Chemistry, Professor at the Faculty of Chemistry, "Alexandru Ioan Cuza" University of Iasi / Specialist in the catalysis of gases

Elena Rezlescu - Ph.D in Physics, Senior Researcher 1 at INCDFT-IFT Iaşi / Specialist in the preparation and study of the properties of oxide semiconductors

Paul Dorin Popa - Ph.D in Physics, Senior Researcher 2 at INCDFT-IFT Iaşi / Specialist in the preparation and study of the properties of oxide semiconductors

Corneliu Doroftei - Ph.D in Physics, Scientific Researcher at INCDFT-IFT Iaşi / Specialist in the preparation and study of the properties of oxide semiconductorsMaria Ignat - Ph.D. in Chemistry, Assistant Professor at the Faculty of Chemistry, "Alexandru Ioan Cuza" University of Iasi / Specialist in the field of advanced nanomaterials

 

OBTAINED RESULTS

Papers published in ISI journals: 12

1) N. Rezlescu , E. Rezlescu, P.D. Popa, E. Popovici, C. Doroftei, M. Ignat, A.C. Barbinta, Morphological and structural aspects of some ferrospinel nanopowders for catalyst applications, Digest Journal of Nanomaterials and Biostructures 7 (2012) 709-1717 / Impact Factor = 1.092

2) N. Rezlescu, E. Rezlescu, P.D. Popa, E. Popovici, C. Doroftei and M. Ignat, Preparation and characterization of spinel-type MeFe2O4 (Me = Cu, Cd, Ni and Zn) for catalyst applications, Materials Chemistry and Physics 137 (2013) 922-927 / Impact Factor = 2.129

3) N. Rezlescu, E. Rezlescu, P.D. Popa, C. Doroftei, M. Ignat, Nanostructured GdAlO3 perovskite, a new possible catalyst for combustion of volatile organic compounds, Journal of Materials Science 48 (2013) 4297-4304 / Impact Factor = 2.305

4) N. Rezlescu , E. Rezlescu, C. Doroftei, P.D. Popa and M. Ignat, Nanostructured lanthanum manganite perovskites in catalyst applications, Digest Journal of Nanomaterials and Biostructures 8 (2013) 581-587 / Impact Factor = 1.123

5) N. Rezlescu, C. Doroftei, E. Rezlescu, P.D. Popa and L. Sachelarie, Structure and morphological properties of Ca-containing La-Pb-Mn-O perovskites for catalytic applications, Journal of Optoelectronics and Advanced Materials, 15 (2013) 62-65 / Impact Factor = 0.457

6) N. Rezlescu, E. Rezlescu, P.D. Popa, C. Doroftei, M. Ignat, Comparative study between catalyst properties of simple spinel ferrite powders prepared by self-combustion route, Romanian Reports in Physics 65(4) (2013) 1348-1356 / Impact Factor = 1.137

7) N. Rezlescu, E. Rezlescu, C. Doroftei, P. D. Popa, La-Pb-Mg-Mn-O perovskites: preparation and structural/microstructural characterizations for catalyst applications, Romanian Reports in Physics 65(4) (2013) 1357-1364 / Impact Factor = 1.137

8) C. Doroftei, P. D. Popa, N. Rezlescu, E. Rezlescu, Nanocrystalline SrMnO3powder as catalyst for hydrocarbon combustion, Journal of Alloys and Compounds 584 (2014) 195-198 / Impact Factor = 2.725

9) N. Rezlescu, E. Rezlescu, L. Sachelarie. P.D. Popa, C. Doroftei, Structural and catalytic properties of mesoporous nanocrystalline mixed oxides containing magnesium, Catalysis Communications 46 (2014) 51-56 / Impact Factor = 3.320

10) N. Rezlescu, E. Rezlescu, P.D. Popa, C. Doroftei, M. Ignat, Characterization and catalytic properties of some perovskites, Composites Part B: Engineering 60 (2014) 515-522 / Impact Factor = 2.602

11) N. Rezlescu, E. Rezlescu, P.D. Popa, C. Doroftei, M. Ignat, Scandium substituted nickel-cobalt ferrite nanoparticles for catalyst applications, Applied Catalysis B: Environmental 158-159 (2014) 70-75 / Impact Factor = 6.007

12) C. Doroftei, P.D. Popa, E. Rezlescu, N. Rezlescu, Structural and catalytic characterization of nanostructured iron manganite, Composites Part B: Engineering 67 (2014) 170-192 / Impact Factor = 2.602

 

TotalImpact Factor: 26.632

Total citations: 19, out of each 5 citations and 14 self-citations

 

Papers published in other journals: 4

1) N.Rezlescu, E.Rezlescu. C.Doroftei, P.D.Popa and M.Ignat, Semiconducting spinel ferrite powders prepared by self-combustion method for catalyst applications, Proceedings of the 35th International Semiconductor Conference (CAS 2012), Sinaia, Romania, October 15-17, 2012, Vol. 2, pp. 287-290

2) N. Rezlescu, E. Rezlescu, L. Sachelarie, P.D. Popa, C. Doroftei, M. Ignat, Nanocrystalline mixed oxides containing magnesium prepared by a combined sol-gel and self-combustion method for catalyst applications, Material Science and Applications 4 (2013) 447-452

3) E. Rezlescu, N. Rezlescu, P.D. Popa, C. Doroftei, M. Ignat, Synthesis and structural aspects of some ferroespinel nanopowders for catalyst applications, International Conference on Material Science and Material Engineering (MSME 2014), edired by Mrinal Pal, DEStech Publications Inc., Lancaster Pensilvania 17602, USA, pp. 75-83

4) N. Rezlescu, E. Rezlesdcu, P.D. Popa, C. Doroftei, M. Ignat, Structure and catalytic properties of some lanthanum manganite perovskites, International Conference on Material Science and Material Engineering (MSME 2014), edired by Mrinal Pal, DEStech Publications Inc., Lancaster Pensilvania 17602, USA, pp. 84-90

 

Paper communicated at national and international conferences: 15

1) N. Rezlescu, E. Rezlescu, C. Doroftei and P.D. Popa, La-Pb-Mg-Mn-O perovskites: preparation and structural/microstructural characterizations for catalyst applications, The 8th General Conference of Balkan Physical Union, Ovidius University Constanta, 5-7 July, 2012.

2) N. Rezlescu, E. Rezlescu, C. Doroftei and P. D. Popa, Structure and morphological properties of Ca-containing La-Pb-Mn-O perovskites for catalytic applications, The 8th General Conference of Balkan Physical Union, Ovidius University Constanta, 5-7 July, 2012.

3) N. Rezlescu, E. Rezlescu, P.D. Popa, C. Doroftei, and M. Ignat, Comparative study between catalyst properties of simple spinel ferrite powders prepared by self-combustion route, National Physics Conference, Ovidius University Constanta, 8-10 July, 2012.

4) N. Rezlescu, E. Rezlescu, C. Doroftei and P. D. Popa, Modified lanthanum manganite nano-perovskites for catalytic gas combustion, The 9th International Conference on Physics of Advanced Materials (ICPAM-9), A, I. Cuza University, Iasi, Romania, 20 - 23 September 2012.

5) N. Rezlescu, E. Rezlescu. C.Doroftei, P.D. Popa and M.Ignat, Semiconducting spinel ferrite powders prepared by self-combustion method for catalyst applications, International Semiconductor Conference (CAS 2012), Sinaia, Romania,15-17 October, 2012.

6) C. Doroftei, P.D. Popa, E. Rezlescu and N. Rezlescu, Nanocrystalline Sr-manganite for catalytic combustion of hydrocarbons, The 13th International Balkan Workshop on Applied Physics and Materials Science, Ovidius University Constanta, 4-6 July, 2013.

7) C. Doroftei, P.D. Popa, E. Rezlescu and N. Rezlescu, Structural, electrical and catalytic characterization of nanostructured iron manganite, The 13th International Balkan Workshop on Applied Physics and Materials Science, Ovidius University Constanta, 4-6 July, 2013.

8) N. Rezlescu, E. Rezlescu, P.D. Popa, C. Doroftei, Material and catalytic properties of two magnesium containing oxide compounds prepared by combined sol-gel and self-combustion method, The XVII International Sol-Gel Conference, Madrid, Spain, August 25-30, 2013.

9) E. Rezlescu, C. Doroftei, L. Sachelarie, P.D. Popa and N. Rezlescu, Some magnetic and catalytic properties of lanthanum manganites prepared by sol-gel combined with self-combustion method, The XVII International Sol-Gel Conference, Madrid, Spain, August 25-30, 2013.

10) N. Rezlescu, E. Rezlescu, P.D. Popa, C. Doroftei and M. Ignat, Physical and catalytic properties of some perovskite nanomaterials,  The 1st International Symposium on Nanoparticles/Nanomaterials and Applications (ISN2A-2014), Costa de Caparica, Portugal, 20-22 January, 2014 .

11) E. Rezlescu, N. Rezlescu , P.D. Popa and C. Doroftei, Properties of two nanocrystalline mixed oxides containing magnesium for catalytic combustion, The 1st International Symposium on Nanoparticles/Nanomaterials and Applications (ISN2A-2014), Costa de Caparica, Portugal, 20-22 January, 2014.

12) N. Rezlescu, E. Rezlescu, P.D. Popa, C. Doroftei, M. Ignat, Structure and catalytic properties of some lanthanum manganite perovskites, The 2014 International Conference on Material Science and Material Engineering (MSME2014), March 15 March 16, 2014, Chicago, Illinois, USA.

13) E. Rezlescu, N. Rezlescu, P.D. Popa, C. Doroftei, M. Ignat, Synthesis and structural aspects of some ferroespinel nanopowders for catalyst applications, The 2014 International Conference on Material Science and Material Engineering (MSME2014), March 15 Martch 16, 2014, Chicago, Illinois, USA.

14) C. Doroftei, P.D. Popa, E. Rezlescu, N. Rezlescu, The role of Sc ions on the magnetic and catalytic properties of Co-Ni nanoferrite, The 14th International Balkan Workshop on Applied Physics and Materials Science, Ovidius University Constanta, 2-4 July, 2014.

15) E. Rezlescu, C. Doroftei, N. Rezlescu, P.D. Popa, Some ferrospinel nanopowders for catalyst applications, The 14th International Balkan Workshop on Applied Physics and Materials Science, Ovidius University Constanta, 2-4 July, 2014

 

Patent applications: 2

1) P.D. Popa, N. Rezlescu, E. Rezlescu, C. Doroftei, Instalaton for isothermal catalysis consists of catalyst deposited on electric heater and circuit for automaticalltycontrolling heater temperature, Patent Application RO 129348-AO

2) C. Doroftei, N. Rezlescu, E. Rezlescu, P.D. Popa, Procedeu de realizare a catalizatorilor oxidici pe suport ceramic, Patent Application submitted to OSIM