Chemical warfare agent simulant DMMP reactive adsorption on TiO2/graphene oxide composites prepared via titanium peroxo-complex or urea precipitation

0495195 - ÚACH 2019 RIV NL eng J - Článek v odborném periodiku
Henych, Jiří - Štengl, Václav - Mattsson, A. - Tolasz, Jakub - Österlund, L.
Chemical warfare agent simulant DMMP reactive adsorption on TiO2/graphene oxide composites prepared via titanium peroxo-complex or urea precipitation.
Journal of Hazardous Materials. Roč. 359, OCT (2018), s. 482-490. ISSN 0304-3894. E-ISSN 1873-3336
Grant ostatní: NATO(US) SPS984599; AV ČR(CZ) MSM200321601
Program: Science for Peace and Security; Program na podporu mezinárodní spolupráce začínajících výzkumných pracovníků
Institucionální podpora: RVO:61388980
Klíčová slova: nanocrystalline metal-oxides * dimethyl methylphosphonate * graphene-oxide * photocatalytic activity * TiO2 surfaces * In situ DRIFT spectroscopy
Obor OECD: Inorganic and nuclear chemistry
Impakt faktor: 7.650, rok: 2018

Two water-based methods were used to produce TiO2/graphene oxide (GO) nanocomposites with 1 and 2 wt.% GO. Both procedures exclude the use of organometallic precursors, as well as the high-pressure and high-temperature treatments, which facilitate pure and energy efficient synthesis amenable for larger scale synthesis. Nanocomposites with narrow (< 10 nm) and long spindle-like (< 100 nm) TiO2 nanoparticles supported on GO flakes were obtained (TiO2/GO), and their properties for reactive destruction of the organophosphorus simile chemical warfare agent (CWA) dimethyl methylphosphonate (DMMP) were investigated by in situ DRIFTS spectroscopy. Both synthesis procedures yielded highly reactive nanocomposites with markedly different properties compared to similarly prepared pure TiO2 nanoparticles. GO also induced morphology and texture changes, which were observed to have a significant impact on the adsorption and reactivity of the nano composites, and which were strongly related to synthesis procedure. In particular, the reduction state of GO, as measured by Raman spectroscopy, was observed to play a major role for the reactivity of the TiO2/GO nano composites.
Trvalý link: http://hdl.handle.net/11104/0288216