M. L. Ovcharov, T. R. Stara, G. V. Korzhak, S. Ya. Kuchmiy
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引用次数: 0
摘要
我们合成了基于结晶氮化碳（CGCN）和钛酸钴（CoTiO3）的纳米复合材料，并通过多种物理化学方法（电子显微镜、电子和红外分光光度法、发光光谱法和 X 射线衍射法）对其进行了表征。根据对所得结果的分析，特别是对发光特性和莫特-肖特基相关性的分析，可以得出结论：在 CGCN/CoTiO3 复合材料的形成过程中，各组分之间实现了光生电荷的 S 型分离。与 CGCN 的存在相比，这导致电子-空穴对的重组减少，水-乙醇溶液的氢气进化效率提高。在波长为 λ = 405 纳米的光照射下，在最佳成分的复合材料的参与下，氢形成的有效量子产率约为 90%。
Photocatalytic Activity of Nanoheterostructures C3N4/CoTiO3 in Hydrogen Evolution from Water–Alcohol Solutions Under Visible Light Irradiation
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 ~90% under light irradiation at λ = 405 nm with the participation of the composite of the optimal composition.
期刊介绍：
Theoretical and Experimental Chemistry is a journal for the rapid publication of research communications and reviews on modern problems of physical chemistry such as:
a) physicochemical bases, principles, and methods for creation of novel processes, compounds, and materials;
b) physicochemical principles of chemical process control, influence of external physical forces on chemical reactions;
c) physical nanochemistry, nanostructures and nanomaterials, functional nanomaterials, size-dependent properties of materials.
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