- PII
- S3034553725080206-1
- DOI
- 10.7868/S3034553725080206
- Publication type
- Article
- Status
- Published
- Authors
- Volume/ Edition
- Volume 99 / Issue number 8
- Pages
- 1272-1282
- Abstract
- The photocatalytic activity of iron-containing composites based on silicon nitride, obtained in the combustion mode of ferrosilicon aluminum (FSA) with various Ta additives (5, 10, 15%), was investigated for hydrogen production from aqueous solutions of HCO under UV and visible light irradiation. X-ray diffraction method revealed that the main phases of the ceramic matrix of the composites are β-SiN and α-Fe, along with the presence of the semiconductor phase TaON. The morphological features of the samples were studied using electron microscopy. The composite synthesized from FSA with 10% Ta exhibited the highest photocatalytic activity, attributed to its optimal composite structure of SiN-TaON-Fe. The mechanisms of HCO adsorption and photocatalytic generation of H from HCO were investigated on Ta-containing composites synthesized from FSA and a mixture of elemental powders (silicon, aluminum) with 10% Ta in the absence and with the addition of HO. It was established that the dependence of photocatalytic H evolution on the concentration of HCO allows the use of the Langmuir-Hinshelwood model. The highest H generation rate (6.34 μmol·min) from HCO is achieved in the presence of HO on the iron-containing composite, which is due to the participation of both heterogeneous and homogeneous photocatalytic processes.
- Keywords
- фотокатализ металлокерамические композиты оксонитрид тантала получение водорода щавелевая кислота
- Date of publication
- 01.08.2025
- Year of publication
- 2025
- Number of purchasers
- 0
- Views
- 24
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