Carbon-Nitride Popcorn-A Novel Catalyst Prepared by Self-Propagating Combustion of Nitrogen-Rich Triazenes.

Autor: Ma J; School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210000, China.; School of Chemistry, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel., Das J; School of Chemistry, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel., Zhang J; Sauvage Laboratory for Smart Materials, Harbin Institute of Technology, Shenzhen, 518055, China., Cheng J; School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210000, China., Sorcar S; Department of Materials Science and Engineering, Tel Aviv University, Tel Aviv, 69978, Israel., Rosen BA; Department of Materials Science and Engineering, Tel Aviv University, Tel Aviv, 69978, Israel.; Center for Advanced Combustion Science, Tel Aviv University, Tel Aviv, 69978, Israel., Shekhter P; Center for Nanoscience and Nanotechnology, Tel Aviv University, Tel Aviv, 69978, Israel., Dobrovetsky R; School of Chemistry, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel., Flaxer E; Afeka Tel Aviv Academic College of Engineering, Tel Aviv, 69107, Israel., Yavor Y; Afeka Tel Aviv Academic College of Engineering, Tel Aviv, 69107, Israel., Shen R; School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210000, China., Kaminker I; School of Chemistry, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel., Goldbourt A; School of Chemistry, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel., Gozin M; School of Chemistry, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel.; Center for Advanced Combustion Science, Tel Aviv University, Tel Aviv, 69978, Israel.; Center for Nanoscience and Nanotechnology, Tel Aviv University, Tel Aviv, 69978, Israel.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2023 Mar; Vol. 19 (12), pp. e2205994. Date of Electronic Publication: 2023 Jan 13.
DOI: 10.1002/smll.202205994
Abstrakt: The interest in development of non-graphitic polymeric carbon nitrides (PCNs), with various C-to-N ratios, having tunable electronic, optical, and chemical properties is rapidly increasing. Here the first self-propagating combustion synthesis methodology for the facile preparation of novel porous PCN materials (PCN3-PCN7) using new nitrogen-rich triazene-based precursors is reported. This methodology is found to be highly precursor dependent, where variations in the terminal functional groups in the newly designed precursors (compounds 3-7) lead to different combustion behaviors, and morphologies of the resulted PCNs. The foam-type highly porous PCN5, generated from self-propagating combustion of 5 is comprehensively characterized and shows a C-to-N ratio of 0.67 (C 3 N 4.45 ). Thermal analyses of PCN5 formulations with ammonium perchlorate (AP) reveal that PCN5 has an excellent catalytic activity in the thermal decomposition of AP. This catalytic activity of PCN5 is further evaluated in a closer-to-application scenario, showing an increase of 18% in the burn rate of AP-Al-HTPB (with 2 wt% of PCN5) solid composite propellant. The newly developed template- and additive-free self-propagating combustion synthetic methodology using specially designed nitrogen-rich precursors should provide a novel platform for the preparation of non-graphitic PCNs with a variety of building block chemistries, morphologies, and properties suitable for a broad range of technologies.
(© 2023 The Authors. Small published by Wiley-VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: