Chemical degradation of trimethyl phosphate as surrogate for organo-phosporus pesticides on nanostructured metal oxides

0439441 - ÚACH 2015 RIV GB eng J - Journal Article
Štengl, Václav - Henych, Jiří - Matys Grygar, Tomáš - Pérez, Raul
Chemical degradation of trimethyl phosphate as surrogate for organo-phosporus pesticides on nanostructured metal oxides.
Materials Research Bulletin. Roč. 61, JAN (2015), s. 259-269. ISSN 0025-5408. E-ISSN 1873-4227
R&D Projects: GA ČR(CZ) GAP106/12/1116
Institutional support: RVO:61388980
Keywords : Nanostructured oxides * Stoichiometric degradation * Trimethyl phosphate
Subject RIV: CA - Inorganic Chemistry
Impact factor: 2.435, year: 2015

Nanostructured TiO2 and mixed oxides of Ti and Fe, Hf, In, Mn or Zr -were prepared by homogeneous hydrolysis of aqueous solution of metal sulphates with urea. The oxides were characterised by X-ray powder diffraction (XRD), scanning electron microscopy, particle size distribution, surface area and porosity. The oxide materials consists of a few nanometre primary crystals (mainly anatase) arranged in a few micrometre regular spherical agglomerates with specific surface area 133-511 m2 g-1. The FTIR diffuse spectroscopy was used for monitoring chemical degradation of trimethylphosphate (TMP) as a surrogate for organo-phosphorus pesticides under ambient and higher temperatures. Undoped TiO2 and Ti,Mn-mixed oxide were most active in cleavage (hydrolysis) of CH3O from TMP at room temperature and 100°C. Cleavage of CH3O in the other studied mixed oxides was not complete until temperature exceeds the boiling point of TMP.
Permanent Link: http://hdl.handle.net/11104/0242843