In:
Angewandte Chemie, Wiley, Vol. 133, No. 39 ( 2021-09-20), p. 21412-21419
Abstract:
Mesoporous carbon nitrides with C 3 N 5 and C 3 N 6 stoichiometries created a new momentum in the field of organic metal‐free semiconductors owing to their unique band structures and high basicity. Here, we report on the preparation of a novel graphitic microporous carbon nitride with a tetrazine based chemical structure and the composition of C 3 N 5.4 using ultra‐stable Y zeolite as the template and aminoguanidine hydrochloride, a high nitrogen‐containing molecule, as the CN precursor. Spectroscopic characterization and density functional theory calculations reveal that the prepared material exhibits a new molecular structure, which comprises two tetrazines and one triazine rings in the unit cell and is thermodynamically stable. The resultant carbon nitride shows an outstanding surface area of 130.4 m 2 g −1 and demonstrates excellent CO 2 adsorption per unit surface area of 47.54 μmol m −2 , which is due to the existence of abundant free NH 2 groups, basic sites and microporosity. The material also exhibits highly selective sensing over water molecules (151.1 mmol g −1 ) and aliphatic hydrocarbons due to its unique microporous structure with a high amount of hydrophilic nitrogen moieties and recognizing ability towards small molecules.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v133.39
DOI:
10.1002/ange.202108605
Language:
English
Publisher:
Wiley
Publication Date:
2021
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