Back to Search
Start Over
Template-free preparation of carbon nitride hollow spheres with adjustable sizes for photocatalytic hydrogen generation.
- Source :
-
Journal of Colloid & Interface Science . Apr2022, Vol. 612, p479-487. 9p. - Publication Year :
- 2022
-
Abstract
- Carbon nitride hollow spheres (CNHS) with adjustable sizes were successfully constructed via a template-free strategy for superior photocatalytic hydrogen generation. [Display omitted] Carbon nitride hollow spheres (CNHS) with adjustable sizes were successfully fabricated via a template-free supramolecular pre-assembly strategy, in which melamine-cyanuric acid (MCA) hollow spheres were constructed through hydrogen bonds. A feasible formation mechanism was proposed, which coupled an inside-out Ostwald ripening with the supramolecular pre-assembly process. Interestingly, the sizes of MCA could be manipulated by changing the pre-assembly temperature. Consequently, the sizes of CNHS were adjustable. The optimal CNHS exhibited excellent photocatalytic hydrogen evolution rate (98.6 μmol/h) in the visible-light region, which was approximately 11 times higher than that of bulk carbon nitride calcined by melamine. The significantly improved performance was due to the contributions including: the unique architectures with remarkable light absorption ability, high electrical conductivity, relatively narrowed band gap, fast charge separation. This work provides a facile template-free supramolecular pre-assembly strategy to fabricate carbon nitride hollow spheres with adjustable sizes for the first time. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 612
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 155017798
- Full Text :
- https://doi.org/10.1016/j.jcis.2021.12.154