Materials Chemistry Department, Institute of Inorganic Chemistry, Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic.
Materials Chemistry Department, Institute of Inorganic Chemistry, Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic.
J Hazard Mater. 2018 Oct 5;359:482-490. doi: 10.1016/j.jhazmat.2018.07.095. Epub 2018 Jul 26.
Two water-based methods were used to produce TiO/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) TiO nanoparticles supported on GO flakes were obtained (TiO/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 TiO nanoparticles. GO also induced morphology and texture changes, which were observed to have a significant impact on the adsorption and reactivity of the nanocomposites, 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 TiO/GO nanocomposites.
采用两种水基法制备了负载 1wt.%和 2wt.%氧化石墨烯（GO）的 TiO2/GO 纳米复合材料。这两种方法都不使用有机金属前体，也不需要高压高温处理，从而促进了绿色、高效的合成，更适用于大规模合成。在 GO 薄片上获得了负载在 GO 薄片上的窄(<10nm)和长纺锤形(<100nm) TiO2 纳米颗粒的纳米复合材料（TiO2/GO），并通过原位 DRIFTS 光谱研究了它们对有机磷模拟化学战剂（CWA）二甲基甲基膦酸酯（DMMP）的反应性破坏性能。与同样制备的纯 TiO2 纳米粒子相比，这两种合成方法都得到了具有显著不同性质的高反应性纳米复合材料。GO 还诱导了形貌和结构的变化，这被观察到对纳米复合材料的吸附和反应性有重大影响，并且与合成方法密切相关。特别是，通过拉曼光谱测量的 GO 的还原态，被观察到对 TiO2/GO 纳米复合材料的反应性起着重要作用。
