Complex Langmuir-Blodgett films of SiO2 and ZnO nanoparticles with advantageous optical and photocatalytical properties

Lívia Naszályi Nagy, Nóra Ábrahám, Örs Sepsi, Erzsébet Hild, Didier Cot, André Ayral, Z. Hórvölgyi

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Multifunctional Langmuir-Blodgett (LB) films were fabricated on the surface of glass substrates using sol-gel derived ZnO and SiO2 particles. ZnO particles of 6 and 110 nm diameter were synthesized according to the methods of Meulenkamp and Seelig et al. (Meulenkamp, E. A. J. Phys. Chem. B 1998, 102, 5566; Seelig, E. W.; Tang, B.; Yamilov, A.; Cao, H.; Chang, R. P. H. Mater. Chem. Phys. 2003, 80, 257). Silica particles of 37 and 96 nm were prepared by the Stöber method (Stöber, W.; Fink, A.; Bohn, E. J. Colloid Interface Sci. 1968, 26, 62). Alternate deposition of monoparticulate Langmuir films of SiO2 and ZnO nanoparticles provided complex (six- and ninelayered) LB films with both antireflective and photocatalytic properties. The LB films were investigated with scanning electron microscopy (morphology and structure) and UV-vis spectroscopy (optical properties and stability). The photocatalytic activity was measured by immersing the UV-irradiated films into an aqueous solution of Methyl Orange and following the photodegradation of the dye by optical spectroscopy. Adding ZnO particles to the silica films slightly lowered the antireflection property but ensured strong photocatalytic activity. Both the photocatalytic activity and antireflection properties were proved to be sensitive to the sequence of the silica and ZnO layers, with optimum properties in the case of nine-layered films with a repeated (SiO2-ZnO-ZnO) structure.

Original languageEnglish
Pages (from-to)12575-12580
Number of pages6
JournalLangmuir
Volume24
Issue number21
DOIs
Publication statusPublished - Nov 4 2008

Fingerprint

Langmuir Blodgett films
Langmuir-Blodgett films
Silicon Dioxide
Nanoparticles
optical properties
nanoparticles
Silica
silicon dioxide
Particles (particulate matter)
Photodegradation
Colloids
Ultraviolet spectroscopy
spectroscopy
Sol-gels
colloids
Coloring Agents
Dyes
Optical properties
dyes
gels

ASJC Scopus subject areas

  • Electrochemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science(all)
  • Spectroscopy

Cite this

Complex Langmuir-Blodgett films of SiO2 and ZnO nanoparticles with advantageous optical and photocatalytical properties. / Nagy, Lívia Naszályi; Ábrahám, Nóra; Sepsi, Örs; Hild, Erzsébet; Cot, Didier; Ayral, André; Hórvölgyi, Z.

In: Langmuir, Vol. 24, No. 21, 04.11.2008, p. 12575-12580.

Research output: Contribution to journalArticle

Nagy, Lívia Naszályi ; Ábrahám, Nóra ; Sepsi, Örs ; Hild, Erzsébet ; Cot, Didier ; Ayral, André ; Hórvölgyi, Z. / Complex Langmuir-Blodgett films of SiO2 and ZnO nanoparticles with advantageous optical and photocatalytical properties. In: Langmuir. 2008 ; Vol. 24, No. 21. pp. 12575-12580.
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AU - Nagy, Lívia Naszályi

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AU - Cot, Didier

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