"Why Carbon, Bismuth, Iron and TiO2?"

  • Carbon: is presented in this study as a high surface area electric conductor support for sensing centers done by 3D-interconnected carbon nanoparticles. It presents tunable nanoporous structure by changing the synthesis parameters (e.g. sol-gel precursor ratios, drying condition, pyrolysis temperature, etc.) [1].

  • Bismuth: possess analytical properties for heavy metal (Pb2+, Cd2+, Zn2+, Hg2+, etc.) detection from aqueous solution which permits to replace more toxic large used Hg electrodes from sensing applications. In this study it was obtained as well dispersed nanoparticles into a large area porous carbon framework [2,3]. It is proper for miniaturization devices and presented analytical properties even though low amount (as well dispersed nanoparticles into a carbon aerogel/xerogel) was involved in testing.

  • Iron: presents sensing activity for organic compounds detection (e.g. H2O2, drugs, etc.) [3], increase the electrical conduction, exhibit magnetic properties and, in high temperature pyrolysis (i.e. 1050oC), generates the formation of graphene structures [4] which increase the electrical conductivity and analytical performance.

  • TiO2: presents photocatalytic activity for the degradation of organic compounds [5] could playing on environmental depollution and for sensing surface cleaning material component.

Various macroscopic forms of involved elements

Materials with involved elements

Bibliography

[1] L.C. Cotet, A. Roig, I.C. Popescu, V. Cosoveanu, E. Molins, V. Danciu, Rev. Roum. Chim. 52(11), 1077, (2007).
[2] M. Gich, C. F.-Sanchez, L.C. Cotet, P. Niu, A. Roig, J. Mater. Chem. A, 1, 11410, (2013).
[3] C.I. Fort, L.C. Cotet, A. Vulpoi, G.L. Turdean, V. Danciu, L. Baia, I.C. Popescu, Sens. Actuators, B, 220, 712, (2015).
[4] M. Baia, L.C. Cotet, L. Baia, L. Barbu-Tudoran, V. Cosoveanu, V. Danciu, J. Popp, J. Optoel. Adv. Materials - Symposia, 2, 9, (2010).
[5] G. Kovacs, L. Baia, A. Vulpoi, T. Radu, E. Karacsanyi, A. Dombi, K. Hernadi, V. Danciu, S. Simon, Zs. Pap, Appl. Cat. B: Environmental, 147, 508, (2014).

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