Реферат: The effect of TiCl4 hydrolysis temperature on the structural, textural and morphological properties of the resulting rutile and on the changes of these properties upon calcination was studied. The XRD, Raman spectroscopy, mercury porosimetry, BET, SEM and TEM studies have revealed that TiO2 rutile has a hierarchical 3D-architecture. The obtained nanostructured rutile had a cauliflowerlike/ spherical morphology composed of fan-shaped nanofibers. Rutile samples were shown to have a heterogeneous pore structure including micro-, meso- and macropores with a BET surface area of 110–140 m2/g. According to the mercury porosimetry, among mesopores and macropores the latter dominate in the samples. Elevation of the synthesis temperature from 50–70 to 80–90 °C decreased the fraction of macropores from 95 to 70%. The BET method showed that the samples synthesized at low temperatures (50–70 °C) contain 30–44% of micropores in the total amount of mesopores and micropores. The fraction of micropores decreases to 25–18% with a subsequent increase in the fraction of mesopores as the synthesis temperature is raised to 80–90 °C. As shown by a study of the samples upon calcination in the temperature range of 100–1000 °C, temperature is the key factor that produces changes in the crystallites size, nanofiber length and packing density, and 3D particle shape at different levels of the hierarchical system and determines features of the porous structure and morphological properties of nanostructured rutile. The assessment of photocatalytic activity in the oxidation of acetone vapor demonstrated that, regardless of the hydrolysis temperature, the synthesized samples of nanostructured rutile are able to oxidize acetone vapor to carbon dioxide and water. In the process, activity of the samples is comparable with that of commercial photocatalysts under UV light and is superior to the activity of commercial photocatalysts P25 (2–4 times) and TiO2 KRONOS vlp 7000 (1.2–2 times) under visible light in dependence on the synthesis temperature.

Библиографическая ссылка: Shikina N.V. , Bessudnova E.V. , Nikitin A.P. , Ishchenko A.V. , Rudina N.A. , Selishchev D.S. , Kozlov D.V. , Ismagilov Z.R.
Study of Nanostructured TiO2 Rutile with Hierarchical 3D-Architecture. Effect of the Synthesis and Calcinations Temperature
Journal of Nanoscience and Nanotechnology. 2020. V.20. N2. P.1303-1314. DOI: 10.1166/jnn.2020.16977 WOS РИНЦ CAPlusCA PMID OpenAlex

Даты:

Опубликована в печати:

1 февр. 2020 г.

Идентификаторы БД:

Web of science:	WOS:000484777500073
РИНЦ:	45587832
Chemical Abstracts:	2020:828399
Chemical Abstracts (print):	173:687736
PMID (PubMed):	31383132
OpenAlex:	W2965605723

Цитирование в БД:

БД	Цитирований
Web of science	2
РИНЦ	2
OpenAlex	1

Альметрики: