Projects / Programmes
Ecotechnological 1D nanomaterials: Synthesis and characterisation of 1D titanate nanomaterials doped with transition metal ions
| Code |
Science |
Field |
Subfield |
| 2.04.02 |
Engineering sciences and technologies |
Materials science and technology |
Metallic materials |
| Code |
Science |
Field |
| P260 |
Natural sciences and mathematics |
Condensed matter: electronic structure, electrical, magnetic and optical properties, supraconductors, magnetic resonance, relaxation, spectroscopy |
| P250 |
Natural sciences and mathematics |
Condensed matter: structure, thermal and mechanical properties, crystallography, phase equilibria |
| P352 |
Natural sciences and mathematics |
Surface and boundary layery chemistry |
| P401 |
Natural sciences and mathematics |
Electrochemistry |
| T140 |
Technological sciences |
Energy research |
| T152 |
Technological sciences |
Composite materials |
nanotechnology, 1D nanomaterials, energy storage, synthesis, catalysis, adsorption, electron microscopy
Researchers (12)
Organisations (2)
Abstract
The aim of the proposed project are research and development of doped one-dimensional (1D) titanate nanomaterials suitable for use in different apllications in the field of environment protection, for instance for polutants removal from waste waters, controlled adsoprtion of green-hous gases and to environment friendlier use of energy by explotation of lithium ion batteries. Doped 1D titanate nanomaterials will be synthesized by two different routs; (1) in situ and (2) ‘’ex situ’’. In in situ synthesis we will start from the TiO2 doped with transition metal ions (Cu2+, Co2+, …), while for ‘’ex situ’’ synthesis doped systems will be prepared by ion exchange in already synthesized titanate 1D nanomaterials of different morphology (nanotubes, nnaowires and nanoribons). Before gas adsorption and lithium transport we will characterize prepared 1D nanomaterials with thermal (TGA/DSC) and electron microscopy techniques (TEM, SEM). For detailed structure characterization we will use X-ray diffraction (XRD) and high resolution transmission electron microscopy in combination with electron energy loss spectroscopy (HRTEM + EELS). Z-contrast (HAADF-STEM) microscopy will enable insight view in crystal strucutre and chemical compostion on atomic level simultanously. Local environment of transiiton metal ions in the doped structures will be studied also indirectly with two resonance techniques; electron paramgnetic resonance (EPR) and nuclear magnetic resonance (NMR). Beside the synthesis of 1D doped titanate systems is the final aim of proposed research uderstanding the imapct of transition metal ions and their concentration on adsorption properties, possible catalytic propertes at gas adsorption of green hous gases and on transport and itrecaltion of lithium in lithium ion batteries. In th fram eof the project a comaprison of results obtained in studies of transition metal ion local environment with resonance and microscopy techniques.
Significance for science
A first publication of T. Kasuge on the synthesis of sodium titanatne nanotubes, published in the Advanced Materials in 1999, has sparkled an intensive research on titanate nanomaterials. Up to now, has been shown that these materials are suitable for use in different apllications in the field of environment protection, for instance for polutants removal from waste waters, controlled adsorption of green-hous gases and to environment friendlier use of energy by explotation of lithium ion batteries and also for photochemical decompostion of organic compounds. The project group in some of these studies successfully takes part. In the framework of the project the main results gained in 2008 that are important for further development of science in the research of new titanate nanomaterials:
•influence of dopant ions on the final morphologies of sodium titanate nanostructures (in the case of TiO2 doped with Cu2+ ions, we were unable to synthesize sodium titanate nanotubes)
•that the presence of dopant ions (in the case of Cr3+ and Mn2+) increased the reaction temperature for the synthesis of sodium titanatnih nanoribbons doped with Cr3+ or Mn2+ ions from 175 to 195 o C
•that during in situ doping on the surface of NaTiNTs and NaTiNRs grow nanoparticles (5x20 nm) in which is the transition metal content higher than in the doped titanate NaTiNTs and NaTiNRs
•we adopted ESEEM technique (electron spin echo envelope modulation) for studying the local environment dopantov ions in doped titanate nanostructures (important for the in situ study of adsorption)
Significance for the country
The project is important for the development of Slovenia in the light of several aspects:
• Synthesis of new materials with improved properties for adsorption, catalysis, energy storage represents an opportunity to develop new products with high added value (filters with high selectivity, adsorption agents, materials with improved AB properties and batteries).
•Education of young researchers and as well of chemistry students (summer work) who in this way gain the necessary practical skills and new knowledge)
-for young researchers Matej Pregelj, Tone Potočnik (mentor. prof. dr. Denis Arcon) and Boštjan Erjavec (mentor dr. Robert Dominko) research work that they do on titanate nanostructures will be included into their doctoral thesis.
-for characterization of synthesized materials within the project several new clollaobration were created (cathodoluminiscence measurments, TXM, high resolution HAADF-STEM (+EELS) with which also young researcher came in touch and in this way they spread their horizons.
•Indirect transfer of gained knowledge into the industry: undergraduate and graduate students will be recruited after the finishing their studies (graduate and ph. d. studies) by the industry, where will indirectly use the knowledge obtained within the project. Anja Sirk who graduated in 2010, and worked in the synthesis and characterization of titanate and MnO2 nanostructures was on the base of this knowledge employed by the company which produces batteries.
Most important scientific results
Annual report
2008,
2009,
final report,
complete report on dLib.si
Most important socioeconomically and culturally relevant results
Annual report
2008,
2009,
final report,
complete report on dLib.si
