Photocatalytic measurements of Tio 2/MWCNT catalysts having different surface coverage

Balázs Réti, Krisztián Németh, Z. Németh, K. Mogyorósi, Kata Markó, A. Erdóhelyi, A. Dombi, K. Hernádi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Photocatalytic oxidation using TiO2 is one way to deal with pollutant compounds. Due to literature data, further improvement can be achieved by using MWCNT-based nanocomposites as photocatalysts. TiO2/multiwall carbon nanotube composite photocatalysts were synthetized by sol-gel method with different level coverages. As-prepared catalysts were characterized with transmission electron microscopy, scanning electron microscopy and X-ray diffraction (XRD). These investigations revealed that we could fabricate MWCNT composite either homogenously, inhomogenously or barely coated with TiO2. XRD results showed that after annealing the amorphous titanium oxide-hydroxide formed anatase phase titanium dioxide which is photocatalytically more active than rutile phase TiO2. Catalysts were tested in both gas and liquid phase photocatalytic reactions using Aeroxide (Degussa) P25 as reference. The concentrations of model compounds were measured by GC and HPLC techniques. As a result of catalytic tests, we have found correlation between morphology and photocatalytic activity. Preferred adsorption of test molecules on MWCNT surface can be a key step of the reaction.

Original languageEnglish
Pages (from-to)2475-2479
Number of pages5
JournalPhysica Status Solidi (B) Basic Research
Volume248
Issue number11
DOIs
Publication statusPublished - Nov 2011

Fingerprint

Photocatalysts
titanium oxides
Titanium dioxide
catalysts
X ray diffraction
Catalysts
composite materials
Titanium oxides
Composite materials
diffraction
anatase
rutile
Sol-gel process
hydroxides
contaminants
Carbon nanotubes
Nanocomposites
nanocomposites
liquid phases
x rays

Keywords

  • Composites
  • Multiwall carbon nanotubes
  • Photocatalysis
  • Titanium dioxide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Photocatalytic measurements of Tio 2/MWCNT catalysts having different surface coverage. / Réti, Balázs; Németh, Krisztián; Németh, Z.; Mogyorósi, K.; Markó, Kata; Erdóhelyi, A.; Dombi, A.; Hernádi, K.

In: Physica Status Solidi (B) Basic Research, Vol. 248, No. 11, 11.2011, p. 2475-2479.

Research output: Contribution to journalArticle

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