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Flat-Band Potential Determination and Catalytical Properties of Sn3O4/SnO2 Heterostructures in the Photo-Electrooxidation of Small Organic Molecules under Ultraviolet (370 nm) and Blue (450 nm) Light Full article

Journal Materials
ISSN: 1996-1944
Output data Year: 2023, Volume: 16, Number: 23, Article number : 7300, Pages count : 15 DOI: 10.3390/ma16237300
Tags Sn3O4; Sn3O4/SnO2; band gap; photo-electrooxidation; acetone; glycerol; methanol
Authors Gribov Evgeny 1 , Koshevoy Evgeny 1 , Kuznetsov Aleksey 1 , Mikhnenko Maxim 1 , Losev Evgeniy 1,2,3 , Lyulyukin Mikhail 1,2
Affiliations
1 Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, Russia
2 Faculty of Natural Sciences, Chair of Solid-State Chemistry, Novosibirsk State University, Pirogova Str. 1, 630090 Novosibirsk, Russia
3 Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Laboratory of Nanoparticles, Institutskaya Str. 3, 630090 Novosibirsk, Russia

Funding (1)

1 Russian Science Foundation 22-23-20208

Abstract: Sn3O4 are promising semiconductor materials due to their visible light absorption ability. In this work, a series of materials, such as SnO2, Sn3O4 and Sn3O4/SnO2 heterostructures, with different phase ratios were prepared using hydrothermal synthesis. The materials were characterized using X-ray diffraction (XRD), Raman and diffuse reflectance spectroscopy (DRS), high resolution transmission electron microscopy (HRTEM), nitrogen adsorption (BET). Flat-band potentials (EFB) of the samples were determined using the photocurrent onset potential (POP) method. It was shown that the potentials obtained with open circuit potential measurements versus illumination intensity (OCP) likely corresponded to the EFB of SnO2 nanoparticles in heterostructures due to interfacial electron transfer from the conducting band of Sn3O4 to that of SnO2 . The photo-electrooxidation processes of a series of organic substrates were studied in the potential range of 0.6–1.4 V vs. RHE under irradiation with ultraviolet (λ = 370 nm) and visible (λ = 450 nm) light. The Sn3O4 sample showed high activity in the photo-electrooxidation of acetone and formic acid in visible light. The Sn3O4/SnO2 samples exhibited noticeable activity only in the oxidation of formic acid. The presence of the SnO2 phase in the Sn3O4/SnO2 samples increased the photocurrent values under ultraviolet illumination, but significantly reduced the oxidation efficiency in visible light.
Cite: Gribov E. , Koshevoy E. , Kuznetsov A. , Mikhnenko M. , Losev E. , Lyulyukin M.
Flat-Band Potential Determination and Catalytical Properties of Sn3O4/SnO2 Heterostructures in the Photo-Electrooxidation of Small Organic Molecules under Ultraviolet (370 nm) and Blue (450 nm) Light
Materials. 2023. V.16. N23. 7300 :1-15. DOI: 10.3390/ma16237300 WOS Scopus РИНЦ AN OpenAlex
Dates:
Submitted: Oct 20, 2023
Accepted: Nov 18, 2023
Published online: Nov 23, 2023
Published print: Dec 1, 2023
Identifiers:
Web of science: WOS:001117559700001
Scopus: 2-s2.0-85179127485
Elibrary: 56103434
Chemical Abstracts: 2023:2576312
OpenAlex: W4388939517
Citing: Пока нет цитирований
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