Optical and electrochemical properties of the carbn nanotubes/polyoxometalates/conducting polymers nanocomposites
Project Director: Dr. Mihaela BAIBARAC
The present project proposal is focused on the synthesis, analysis and demonstration at laboratory level of some potential applications of hybrid nanocomposites, carbon nanotubes/poly oxometalates/conducting polymer (CN/PO/CP)-like in energy storage and sensors fields. A special attention in payed to carbon nanotubes individualization, when it is estimated an improvement of the CN/PO/CP hybrid material electrochemical response. The subject of the project develops researches in advanced materials synthesis field, nanoscience and nanotechnologies. The activitie carried out have a marked interdisciplinary accent, and realizing the project objectives implies activities of: A) evidencing and evaluating the chemical and physical interactions between the constituents forming the composite materials (CN/PO, CP/PO and CN/CP) through studies of: A1) UV-VIS-NIR and FTIR absorption spectroscopy, Raman scattering-SERS, photoluminescence (PL) and excitation of PL; A2) cyclic voltammetry (CV) concerning the oxido-reduction processes taking place at the CN/PO, CP/PO and CN/CP interfaces, B) the characterization of the new composite materials, chemically and electrochemically obtained, based on carbon nanotubes (single, double and multi walled), poly oxometalats and conducting polymer of poly indole (PIN) and poly phenil diamine (PPDA) type through: B1) optical, B2) VS studies concerning the ionic transport of Li+ in the film of composite material CN/PO/CP, B3) electrochemical impedance spectroscopy studies and C) demonstrative studies at laboratory level concerning possible applications in the fields of C1) energy storage, the attention being focused on using the NC/PO/CP composite as active material in rechargeable batteries with Lithium by making charg/discharge tests, C2) electrochemical sensors based on CN/PO/PPDA nanocomposite used in detecting nitrite and bromates ions in drinkable water
2007
1. The elaboration of a new method of purification, isolation, and dispersion of carbon nanotubes (CNs). -the degree of achievement: 100%
2. The illustration by FTIR absorption spectroscopy and Raman scattering of: i) the purification and functionalization effect of the carbon nanotubes with phosphomolybdic acid hydrate (PMo12) and ii) the induced modification to the conductive polymer due to the doping process with phosphomolybdic acid hydrate heteropolyanions (PO).-the degree of achievement: 100%
b) 2008
1. The synthesis of the CN/PO/PIN nanocomposite via polymerization reactions: i) in solid state and ii) electrochemically. -the degree of achievement: 100%
2. The optical properties of the CN/PO/PIN nanocomposite and the evaluation of the functionalization type of CN with PO and PIN. -the degree of achievement: 100%
3. The electrochemical properties of the CN/PO/PIN nanocomposite film.-the degree of achievement: 100%
2009
1. The radicalic polymerization of phenylenediamine in the presence of CNs and PMo12 .-the degree of achievement: 100%
2. The electrochemical synthesis of the NC/PO/PFDA nanocomposite. -the degree of achievement: 100%
3. Characterization by optical methods and spectroscopy of electrochemical impedance of the NC/PO/PFDA nanocomposite.-the degree of achievement: 100%
2010
1.demonstrative studies regarding the usage of the NC/PO/PIN composite in applications in the field of the rechargeable lithium batteries.
2.demonstrative studies of laboratory regarding the possibility of using the NC/PO/PFDA composite as an electrochemical sensor.
3. evaluating the multi-utility of the NC/PO/PC nanocomposites.
The research team of the projectDr. Baibarac Mihaela, Scientific Researcher 1-st degree
Dr. Baltog Ioan , Scientific Researcher 1-st degree
Husanu Marius, Scientific Researcher , PhD student
Scocioorenu Malvina, Researcher Assistant, PhD student
Ionescu Ioana, Researcher Assistant, Master student
The degree of implication of the young researchers
- M Husanu - Performed activities:
- preparation of SERS active substrates
- Raman characterization of the composites based on polyphenylenediamine (PFDA), molybdatphosphor acid (PMo12) and metallic carbon nanotubes with a single wall (SWNTs), prepared by: i) the mixture of PFDA/PMo12 with SWNTs, ii) chemical polymerization and iii)electrochemical polymerization.
- the influence of SWNTs and PMo12 concentration on the vibrational properties of the composite PFDA/PMo12/SWNTs
- M. Scocioreanu - Performed activities:
- the chemical preparation of the composites: PFDA/PMo12/SWNTs and PFDA/SWNTs;
- the effectuation of sliminess measurements;
- the preparation method of the carbon nanotubes film / molybdatphosphor acid and polyindole (NC/PMo12/PIN) used as a positive electrode in rechargeable batteries with lithium;
- getting the electrodes NC/PMo12/PFDA for the electrochemical cell Zn/Zn(ClO4)2 composite NC/PMo12/PFDA.
- I. Ionescu - Activities:
- the UV-VIS-NIR and Raman characterization of the composites based on PFDA,PMo12 and SWNTs semiconductors prepared by:
- i) the blending of PFDA/PMo12 with SWNTs
- ii) chemical polymerization
- iii) electrochemical polymerization
- the emphasis of the electrocatalitic ability of the nanocomposite NC/PMo12/PFDA for the reduction of the nitrates and bromides
- the UV-VIS-NIR and Raman characterization of the composites based on PFDA,PMo12 and SWNTs semiconductors prepared by:
Raman and FTIR studies on electro-reduction of single-walled carbon nanotube films in the presence of Li salts
I. Baltog, M. Baibarac, S.Lefrant, J.Y. Mevellec
Diamond and Related Materials, 17 (7-10), 1558-1564, 2008
Single-beam pumped coherent anti-Stokes Raman scattering on carbon nanotubes
S. Lefrant, J.P. Buisson, J.Y. Mevellec, I. Baltog, M. Baibarac
Physica Status Solidi B-Basic Solid State Physics, 245 (10) 2221-2224, 2008
Raman spectroscopic evidence for interfacial interactions in poly(bithiophene)/single-walled carbon nanotube composites
M. Baibarac, I. Baltog, S. Lefrant
Carbon , 47 (5), 1389-1398, 2009
Vibrational properties of the electrochemically synthesized polyindole/single-walled carbon nanotubes composite
M. Baibarac, I. Baltog, M. Scocioreanu, S. Lefrant, J.Y. Mevellec
Synthetic Metals, 159 (23-24), 2550-2555, 2009
Raman and FTIR spectroscopy as valuable tools for the characterization of polymer and carbon nanotube based composites
S.Lefrant, M. Baibarac, I. Baltog
Journal of Materials Chemistry, 19 5690-5704, 2009
Recent progress in synthesis, vibrational characterization and applications trend of conjugated polymers/carbon nanotubes composites
M. Baibarac, I. Baltog, S. Lefrant
Current Organic Chemistry, 15 (8), 1160-1196(37), 2011
Hybrid organic-inorganic materials based on poly(o-phenylenediamine) and polyoxometallate functionalized carbon nanotubes
M. Baibarac, I. Baltog, I. Smaranda, M. Scocioreanu, S. Lefrant
Journal of Molecular Structure, 985 (2-3), 211-218, 2011
One-dimensional composites based on single walled carbon nanotubes and poly(o-phenylenediamine)
M. Baibarac, I. Baltog, M. Scocioreanu, B. Bellosteros, J.Y. Mevellec, S. Lefrant
Synthetic Metals, 161 (21-22), 2344-2354, 2011
Composites Based on Conducting Polymers and Carbon Nanotubes
M Baibarac, I Baltog si S. Lefrant
chapter 5 in Nanostructured Conductive Polymers, Edited by Eftekhari, 2010, John Wiley & Sons Ltd
Conferences & Workshops:
Electrochemical polymerization of indole in the presence of single walled carbon nanotubes
M. Baibarac, I. Baltog, S.Lefrant, et al.
PROJECTS/ NATIONAL PROJECTS
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