Synthesis of high-quality crystalline carbon nitride oxide by selectively driving the high-temperature instability of urea with pressure
File(s)
Accepted version
Author(s)
Dziubek, Kamil
Citroni, Margherita
Fanetti, Samuele
Cairns, Andrew B
Bini, Roberto
Type
Journal Article
Abstract
One-step synthesis using only physical tools is an appealing “green” method for the realization of technological materials. High-pressure conditions are particularly suitable in the attainment of extended supramolecular networks and in combination with high-temperature are effective in selecting specific reaction pathways to increase product quality. Here we show how pressures below 3 GPa and temperatures on the order of 420 K are effective for the synthesis, from urea crystal phase IV, of 2D graphitic carbon nitride oxide with enhanced crystalline quality. Angle-dispersive X-ray diffraction and Fourier transform IR spectroscopy show that the reaction becomes less selective at higher pressure with the formation of melamine and ammonium carbamate as byproducts. An anomalous positive slope is shown by the P–T instability boundary, likely arising from unfavorable hydrogen bonding with respect to the topochemical path, making urea an interesting case study for gaining insight into the role of hydrogen bonding in solid-state reactivity.
Date Issued
2017-09-14
Date Acceptance
2017-09-01
Citation
The Journal of Physical Chemistry C: Energy Conversion and Storage, Optical and Electronic Devices, Interfaces, Nanomaterials, and Hard Matter, 2017, 121 (36), pp.19872-19879
ISSN
1932-7447
Publisher
American Chemical Society
Start Page
19872
End Page
19879
Journal / Book Title
The Journal of Physical Chemistry C: Energy Conversion and Storage, Optical and Electronic Devices, Interfaces, Nanomaterials, and Hard Matter
Volume
121
Issue
36
Copyright Statement
© 2017 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry C, after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.7b06751.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000411171800034&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Chemistry
Science & Technology - Other Topics
Materials Science
METAL-FREE CATALYSTS
VISIBLE-LIGHT
AMMONIUM CARBAMATE
INFRARED-SPECTRA
X-RAY
OXYGEN
SPECTROSCOPY
DIFFRACTION
PHOTOREACTIVITY
REDUCTION
Publication Status
Published
Date Publish Online
2017-09-01