PROJECT CODE: PN-II-RU-TE-2014-4-1194
FUNDING SOURCES: CNCS-UEFISCDI
PROJECT No: 280/01.10.2015

PROJECT TITLE: Electrode materials based on carbon porous structures, Bi-Fe and/or TiO2, with analytical applications

HOST INSTITUTION: Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania, www.chem.ubbcluj.ro
TIME: 01.10.2015 - 30.09.2017, (24 months)


SPECIFIC OBJECTIVE

Preparation of (Carbon Aerogel or Xerogel)/(Bi-Fe)/TiO2 composites with application in amperometric sensor construction for heavy metal (Cd, Pb, etc.) and organic compound (H2O2, pharmaceutical compounds, etc.) detection, having the photorenewing capacity of the surface.

ABSTRACT

The project proposes the synthesis, characterization and testing of carbon porous structures of aerogels and xerogels types impregnated with Bi and Fe nanoparticles in order to obtain amperometric sensors for the detection of heavy metals (Cd, Pb, etc.) and organic compounds (H2O2, pharmaceutical products). Thus, an alternative to the Hg electrode, use in electroanalytical applications, is promoted. In order to photoregenerate the sensor surface, for the first time for this type of sensor, the composite will be modified with TiO2 particles, a photocatalytic active material. Morphological and structural characterization of composite will be performed by N2 adsorption-desorption, TEM, SEM, XRD, Raman spectroscopy. By composite immobilizing on the electrodes surface (e.g. glassy carbon), using polymer matrix (e.g. chitosan), will decrease the composite amount used for the sensor preparation, thus reducing its cost and giving it qualities for miniaturization. In order to assess the analytical performance of the obtained amperometric sensor (sensitivity, selectivity, detection limit, stability, reproducibility), electrochemically characterization by CV, SWV and testing for heavy metal and organic compound (by CV, SWV, RDE) detection are performed.The results will be the subject of four presentations at scientific meetings, three manuscripts submitted (one before 2017) for publication in ISI journals and a submission of national patent requirement.

According to the proposed objectives, samples of carbon xerogels and aerogels not/impregnated with Bi - Fe nanoparticles, and not/modified with TiO2 have been prepared. These have been morpho-structural characterized (by N2 adsorption-desorption, TEM, SEM, XRD, Raman spectroscopy, etc.), electrochemical investigated and tested in sensing applications for detections of heavy metal (Pb2+, Cd2+) and H2O2, and in photodegradation of metil orange. The obtained results were included in twelve presentations at six international scientific meetings, in one published manuscript , in two submitted manuscripts in ISI journals, in one in work manuscript and in one national patent requirement.
Beside these, following the Project sustainability line and in order to improve the conducting-sensing properties of carbon materials, graphene based materials were investigated to be involved in the structure of obtained materials. Related to this target, other two papers have been published in ISI journals under project cover.


TEAM MEMBERS
- CS III Dr. Liviu Cosmin COTET- project manager, e-mail: ccosmin@chem.ubbcluj.ro;
- CS III Dr. Carmen Ioana FORT - team member;
- CS III Dr. Adriana LAZAR-VULPOI- team member;
- Dr. Lucian Cristian POP - team member, (Sept.2016-present)/ CS II Dr. Zsolt PAP- team member, (Sept.2015-Aug.2016);
- Dr. Gabor KOVACS - team member;
- Dr. Nicoleta COTOLAN - team member;
- PhD student Aglaia Raluca DEAC -team member;
- PhD student Calin CADAR - team member;
- PhD student Mihai RUSU - team member.

* 30.09.2017