Volume 60, Issue 39 pp. 21242-21249
Communication

Microporous Carbon Nitride (C3N5.4) with Tetrazine based Molecular Structure for Efficient Adsorption of CO2 and Water

Dr. CI Sathish

Corresponding Author

Dr. CI Sathish

Global Innovative Center for Advanced Nanomaterials (GICAN), College of Engineering, Science, and Environment, The University of Newcastle, Callaghan, New South Wales, 2308 Australia

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Dr. S. Premkumar

Dr. S. Premkumar

Global Innovative Center for Advanced Nanomaterials (GICAN), College of Engineering, Science, and Environment, The University of Newcastle, Callaghan, New South Wales, 2308 Australia

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Xueze Chu

Xueze Chu

Global Innovative Center for Advanced Nanomaterials (GICAN), College of Engineering, Science, and Environment, The University of Newcastle, Callaghan, New South Wales, 2308 Australia

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Dr. Xiaojiang Yu

Dr. Xiaojiang Yu

Singapore Synchrotron Light Source, National University of Singapore, Singapore, 117603 Singapore

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Prof. Mark B. H. Breese

Prof. Mark B. H. Breese

Singapore Synchrotron Light Source, National University of Singapore, Singapore, 117603 Singapore

Department of Physics, National University of Singapore, Singapore, 119260 Singapore

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Dr. Mohammed Al-Abri

Dr. Mohammed Al-Abri

Department of Petroleum and Chemical Engineering, College of Engineering, Sultan Qaboos University, Muscat, Oman

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Dr. Ala'a H. Al-Muhtaseb

Dr. Ala'a H. Al-Muhtaseb

Department of Petroleum and Chemical Engineering, College of Engineering, Sultan Qaboos University, Muscat, Oman

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Dr. Ajay Karakoti

Dr. Ajay Karakoti

Global Innovative Center for Advanced Nanomaterials (GICAN), College of Engineering, Science, and Environment, The University of Newcastle, Callaghan, New South Wales, 2308 Australia

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Prof. Jiabao Yi

Corresponding Author

Prof. Jiabao Yi

Global Innovative Center for Advanced Nanomaterials (GICAN), College of Engineering, Science, and Environment, The University of Newcastle, Callaghan, New South Wales, 2308 Australia

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Prof. Ajayan Vinu

Corresponding Author

Prof. Ajayan Vinu

Global Innovative Center for Advanced Nanomaterials (GICAN), College of Engineering, Science, and Environment, The University of Newcastle, Callaghan, New South Wales, 2308 Australia

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First published: 10 August 2021
Citations: 68

Graphical Abstract

The new class of microporous carbon nitride with rich nitrogen moieties templated from zeolite shows periodic porosity with a unique CN framework and enhanced active sites that triggered highly selective sensing owing to the high amount of hydrophilic nitrogen species.

Abstract

Mesoporous carbon nitrides with C3N5 and C3N6 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 C3N5.4 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 m2 g−1 and demonstrates excellent CO2 adsorption per unit surface area of 47.54 μmol m−2, which is due to the existence of abundant free NH2 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.

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