Open AccessPhotocatalytic water splitting of nanocomposite materials based on TiO2 and rGO nanorods
Author(s) -
Т. М. Сериков,
AUTHOR_ID,
A.E. Sadykova,
P.A. Zhanbirbayeva,
A.S. Baltabekov,
A.S. Kayumova,
AUTHOR_ID
Publication year - 2022
Publication title -
ķaraġandy universitetìnìn̦ habaršysy. fizika seriâsy/ķaraġandy universitetìnìņ habaršysy. fizika seriâsy
Language(s) - English
Resource type - Journals
eISSN - 2663-5089
pISSN - 2518-7198
DOI - 10.31489/2021ph3/115-121
Subject(s) - nanorod , materials science , photocatalysis , titanium dioxide , nanocomposite , graphene , oxide , chemical engineering , autoclave , nanomaterials , hydrogen , nanotechnology , titanium , composite material , chemistry , catalysis , metallurgy , organic chemistry , engineering
The paper presents the results of a study of films formed by titanium dioxide nanorods and deposited on their surface of reduced graphene oxide by electrochemical deposition. Nanostructured films based on TiO2 nanorods were prepared in a 100 ml stainless steel autoclave with a fluoroplastic insert from a solution containing 35 ml of deionized water (H2O), 35 ml of hydrochloric acid (HCl) (36.5 %, Sigma–Aldrich) and 0.25 ml of titanium butylate C16H36O4Ti (97 %, Sigma–Aldrich). The addition of reduced graphene oxide to the structure of titanium dioxide nanorods increases the specific surface area of nanostructures from 29.3 m2 /g to 63.1 m2 /g. Calculations based on the film impedance spectra have shown that the optimal deposition time of reduced graphene oxide on the surface of TiO2 nanorods is 3 minutes, since it has a low recombination coefficient and a long electron lifetime. Studies of the photocatalytic activity of nanomaterials and registration of the released hydrogen and oxygen gases have shown that when the films are irradiated for 5 hours, the amount of hydrogen released varies from 50 to 225 mmol/cm2 .