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Accelerating interlayer charge transport of alkali metal-intercalated carbon nitride for enhanced photocatalytic hydrogen evolution.
- Source :
- Research on Chemical Intermediates; Dec2021, Vol. 47 Issue 12, p5189-5202, 14p
- Publication Year :
- 2021
-
Abstract
- Adjusting the interlayer structure of carbon nitride is expected to adjust its physicochemical properties, thereby enhancing photocatalytic activity. In this paper, alkaline metal ion-intercalated carbon nitride was prepared by molten salt co-pyrolysis. Alkali metal ions acted as mediators to provide a new migration path for the photogenerated electrons of g-C<subscript>3</subscript>N<subscript>4</subscript>. The intercalation of K<superscript>+</superscript> and Na<superscript>+</superscript> reduced the bandgap value of carbon nitride, expanded the visible light absorption range, and promoted the separation and migration of charge carriers. As a result, the hydrogen production rate of DCN1 reached 500 μmol g<superscript>−1</superscript> h<superscript>−1</superscript>, which was 10 times than that of pristine g-C<subscript>3</subscript>N<subscript>4</subscript>. Experimental and theoretical methods were used to explain the improvement of photocatalytic efficiency after K<superscript>+</superscript> and Na<superscript>+</superscript> were intercalated into the interlayer of g-C<subscript>3</subscript>N<subscript>4</subscript>. Our work provided a new idea for the design of high-efficiency hydrogen evolution photocatalysts via intercalation method. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09226168
- Volume :
- 47
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Research on Chemical Intermediates
- Publication Type :
- Academic Journal
- Accession number :
- 153554374
- Full Text :
- https://doi.org/10.1007/s11164-021-04575-8