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Microporous Carbon Nitride (C 3 N 5.4 ) with Tetrazine based Molecular Structure for Efficient Adsorption of CO 2 and Water
Author(s) -
Sathish CI,
Premkumar S.,
Chu Xueze,
Yu Xiaojiang,
Breese Mark B. H.,
AlAbri Mohammed,
AlMuhtaseb Ala'a H.,
Karakoti Ajay,
Yi Jiabao,
Vinu Ajayan
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202108605
Subject(s) - microporous material , carbon nitride , adsorption , molecule , carbon fibers , graphitic carbon nitride , nitride , mesoporous material , stoichiometry , inorganic chemistry , chemistry , materials science , tetrazine , chemical engineering , organic chemistry , layer (electronics) , catalysis , photocatalysis , composite number , engineering , composite material
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.