Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Nur-Sultan 010008, Kazakhstan.
Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty 050032, Kazakhstan.
Molecules. 2020 Apr 22;25(8):1943. doi: 10.3390/molecules25081943.
This work is devoted to the study of phase transition processes in nanostructured ceramics of the YO/TiO-YTiO type doped with carbon nanotubes as a result of thermal annealing, as well as to the assessment of the prospects of the effect of phase composition on photocatalytic activity. By the method of X-ray phase analysis, it was found that an increase in the annealing temperature leads to the formation of the orthorhombic phase YTiO, as well as structural ordering. Based on the obtained UV spectra, the band gap was calculated, which varies from 2.9 eV (initial sample) to 2.1 eV (annealed at a temperature of 1000 °C). During photocatalytic tests, it was established that the synthesized nanostructured ceramics YO/TiO-YTiO doped CNTs show a fairly good photocatalytic activity in the range of 60-90% decomposition of methyl orange.
这项工作致力于研究掺杂碳纳米管的 YO/TiO-YTiO 型纳米结构陶瓷在热退火过程中的相变过程，以及评估相组成对光催化活性的影响的前景。通过 X 射线相分析方法，发现随着退火温度的升高，形成了正交相 YTiO，以及结构有序化。基于获得的紫外光谱，计算了带隙，其从 2.9 eV（初始样品）变化到 2.1 eV（在 1000°C 的温度下退火）。在光催化测试中，已经确定合成的纳米结构陶瓷 YO/TiO-YTiO 掺杂 CNTs 在甲基橙分解的 60-90%范围内表现出相当好的光催化活性。
