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Sol-gel synthesis of Se and Te containing TiO2 nanocomposites with photocatalytic and antibacterial properties

A. BACHVAROVA-NEDELCHEVA1,* , R. IORDANOVA1, A. STOYANOVA2, N. GEORGIEVA3, TS. ANGELOVA3

Affiliation

  1. Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, “Acad. G. Bonchev” str., bld. 11, 1113 Sofia, Bulgaria
  2. Medical University, “Kl. Ohridski”, str. 1, 5800 Pleven, Bulgaria
  3. Department of Biotechnology, University of Chemical Technology and Metallurgy, 8 Kl. Ohridski, 1756, Sofia, Bulgaria

Abstract

Two gel compositions containing 20 and 25 mol % SeO2 (80TiO2.20SeO2 and 50TiO2.25TeO2.25SeO2) were selected for detailed investigations. The crystallization tendency in the temperature range 200 – 400 C was investigated. According to XRD analysis selenium nanoparticles dispersed in an amorphous matrix were found up to 300 C. The microprobe analysis proved presence of selenium at 400 C. The photocatalytic tests showed that the binary sample (80TiO2.20SeO2) possesses photocatalytic activity toward Malachite green organic dye. Both compositions exhibited good antimicrobial activity against E. coli K12..

Keywords

Sol-gel, Selenium, Composite materials, Photocatalysis, Antibacterial properties.

Submitted at: Nov. 2, 2015
Accepted at: Feb. 10, 2016

Citation

A. BACHVAROVA-NEDELCHEVA, R. IORDANOVA, A. STOYANOVA, N. GEORGIEVA, TS. ANGELOVA, Sol-gel synthesis of Se and Te containing TiO2 nanocomposites with photocatalytic and antibacterial properties, Journal of Optoelectronics and Advanced Materials Vol. 18, Iss. 1-2, pp. 5-9 (2016)