Synthesis, Characterization and Photocatalytic Activity of Spherulite-like r-TiO2 in Hydrogen Evolution Reaction and Methyl Violet Photodegradation | Sciact - CRIS-system of Boreskov Institute of Catalysis

Synthesis, Characterization and Photocatalytic Activity of Spherulite-like r-TiO2 in Hydrogen Evolution Reaction and Methyl Violet Photodegradation Full article

Journal

Catalysts
ISSN: 2073-4344

Output data

Year: 2022, Volume: 12, Number: 12, Article number : 1546, Pages count : 13 DOI: 10.3390/catal12121546

Tags

titania; rutile; spherulites; hydrothermal synthesis; photocatalysis; hydrogen evolution reaction; methyl violet degradation

Authors

Bachina Anastasia K. ¹ , Popkov Vadim I. ¹ , Seroglazova Anna S. ¹ , Enikeeva Maria O. ¹ , Kurenkova Anna Yu. ² , Kozlova Ekaterina A. ² , Gerasimov Evgeny Y. ² , Valeeva Albina A. ³ , Rempel Andrey A. ⁴

Affiliations

1	Ioffe Institute, Russian Academy of Sciences, 194021 Saint-Petersburg, Russia
2	Boreskov Institute of Catalysis of the Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
3	Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, 620990 Ekaterinburg, Russia
4	Institute of Metallurgy, Ural Branch of the Russian Academy of Sciences, 620016 Ekaterinburg, Russia

Funding (2)

1	Ministry of Science and Higher Education of the Russian Federation	0397-2019-0001
2	Ministry of Science and Higher Education of the Russian Federation	0034-2019-0002

Synthesis and characterization of spherulite-like nanocrystalline titania with rutile structure (r-TiO2) are described herein. The r-TiO2 particles were synthesized via the convenient and low-cost hydrothermal treatment of TiO(C6H6O7) titanyl citrate. The r-TiO2 spherulites are micron-sized agglomerates of rod-shaped nanocrystals with characteristic sizes of 7(±2) × 43(±10) nm, oriented along (101) crystallographic direction, and separated by micropores, as revealed by SEM and TEM. PXRD and Raman spectroscopy confirmed the nanocrystalline nature of r-TiO2 crystallites. BET analysis showed a high specific surface area of 102.6 m2/g and a pore volume of 6.22 mm3/g. Photocatalytic performances of the r-TiO2 spherulites were investigated for the processes of methyl violet (MV) degradation in water and hydrogen evolution reaction (HER) in aqueous solutions of ethanol. The (MV) degradation kinetics was found to be first-order and the degradation rate coefficient is 2.38 × 10−2 min−1. The HER was performed using pure r-TiO2 spherulites and nanocomposite r-TiO2 spherulites with platinum deposited on the surface (r-TiO2/Pt). It was discovered that the r-TiO2/Pt nanocomposite has a 15-fold higher hydrogen evolution rate than pure r-TiO2; their rates are 161 and 11 nmol/min, respectively. Thus, the facile synthesis route and the high photocatalytic performances of the obtained nanomaterials make them promising for commercial use in such photocatalytic processes as organic contamination degradation and hydrogen evolution.

Bachina A.K. , Popkov V.I. , Seroglazova A.S. , Enikeeva M.O. , Kurenkova A.Y. , Kozlova E.A. , Gerasimov E.Y. , Valeeva A.A. , Rempel A.A.
Synthesis, Characterization and Photocatalytic Activity of Spherulite-like r-TiO2 in Hydrogen Evolution Reaction and Methyl Violet Photodegradation
Catalysts. 2022. V.12. N12. 1546 :1-13. DOI: 10.3390/catal12121546 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Oct 29, 2022
Accepted:	Nov 27, 2022
Published print:	Dec 1, 2022
Published online:	Dec 1, 2022

Web of science:	WOS:000902333400001
Scopus:	2-s2.0-85144829720
Elibrary:	49837492
Chemical Abstracts:	2023:44126
OpenAlex:	W4310534204

DB	Citing
Scopus	8
Web of science	7
OpenAlex	9