PHOTOCATALYTIC ACTIVITY OF NANOHETEROSTRUCTURES C3N4/CoTiO3 IN HYDROGEN EVOLUTION FROM WATER-ALCOHOL SOLUTIONS UNDER VISIBLE LIGHT IRRADIATION

被引：0
作者：
Ovcharov, M. L. [1 ,2 ]
Stara, T. R. [1 ,2 ]
Korzhak, G. V. [1 ,2 ]
Kuchmiy, S. Ya. [1 ,2 ]
机构：
[1] NAS Ukraine, LV Pisarzhevskii Inst Phys Chem, Kyiv, Ukraine
[2] NAS Ukraine, VE Lashkaryov Inst Semicond Phys, Kyiv, Ukraine
来源：
THEORETICAL AND EXPERIMENTAL CHEMISTRY | 2024年 / 60卷 / 01期
关键词：
crystalline carbon nitride; cobalt titanate; S-scheme; photocatalysis; molecular hydrogen; CARBON NITRIDE; HETEROJUNCTION; DEGRADATION;
D O I：
10.1007/s11237-024-09806-8
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Nanocomposites based on crystalline carbon nitride (CGCN) and cobalt titanate (CoTiO3) have been synthesized and characterized by a number of physico-chemical methods (electron microscopy, electron and IR spectrophotometry, luminescence spectroscopy, and X-ray diffraction). It is concluded based on the analysis of the obtained results, in particular, the luminescence characteristics and Mott-Schottky dependences, that the S-scheme of separation of photogenerated charges between components is realized during the formation of CGCN/CoTiO3 composites. This leads to a decrease in the recombination of electron-hole pairs and an increase in the efficiency of hydrogen evolution from water-ethanol solutions when compared to the presence of CGCN. The effective quantum yield of hydrogen formation is similar to 90% under light irradiation at lambda = 405 nm with the participation of the composite of the optimal composition.
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页码：31 / 40
页数：10
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