Dissolution and Liquid Crystals Phase of 2D Polymeric Carbon Nitride

Abstract

Graphite-phase polymeric carbon nitride (GPPCN) has emerged as a promising metal-free material toward optoelectronics and (photo)catalysis. However, the insolubility of GPPCN remains one of the biggest impediments toward its potential applications. Herein, we report that GPPCN could be dissolved in concentrated sulfuric acid, the first feasible solvent so far, due to the synergistic protonation and intercalation. The concentration was up to 300 mg/mL, thousands of time higher than previous reported dispersions. As a result, the first successful liquid-state NMR spectra of GPPCN were obtained, which provides a more feasible method to reveal the finer structure of GPPCN. Moreover, at high concentration, a liquid crystal phase for the carbon nitride family was first observed. The successful dissolution of GPPCN and the formation of highly anisotropic mesophases would greatly pave the potential applications such as GPPCN-based nanocomposites or assembly of marcroscopic, ordered materials.

Characterization of urea derived polymeric carbon nitride and resultant thermally vacuum deposited amorphous thin films: Structural, chemical and photophysical properties

“…4c and d. The carbon C 1s region (Fig. 4c) (tri-s-triazine ring out of plane bending [72]), indicating the retention of some ring character in these thin films. Fig.…”

Intercorrelated Superhybrid of AgBr Supported on Graphitic‐C3N4‐Decorated Nitrogen‐Doped Graphene: High Engineering Photocatalytic Activities for Water Purification and CO2 Reduction

“…Typical graphitic-like layer structure of CN was confi rmed by XRD pattern with a strong diffraction peak at 27.71° corresponding to the (002) peak ( d = 0.321 nm), which is well known for the C N melon networks. [ 11 ] Yet, the shift of (002) peak from 27.71° to 27.21° ( d = 0.328 nm) for CNNG might be attributed to the structure change of carbon in CNNG hybrid system after nitrogen doping or a strong coupling between CN layers and NG nanosheets. [ 12 ] Another peak at 13.12° should be assigned to (100) in-planar ordering of tri-s-triazine units with interplanar distance of 0.675 nm.…”

Potential-Modulated Electrochemiluminescence of Carbon Nitride Nanosheets for Dual-Signal Sensing of Metal Ions

“…The texture of the as-prepared GPPCN nanosheets was firstly assessed by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The most typical (002) diffraction peaks at the 2θ of 27° corresponding to the layered stacking 2D structure [44][45][46] (Fig. 1b) and the vibration at 806 cm -1 and 1200 to 1650 cm -1 (Fig.…”