Preparation of mesoporous carbon nitride structure by the dealloying of Ni/a-CN nanocomposite films
Abstract
The preparation of mesoporous carbon nitride (p-CN) structure by the selective dealloying process of Ni/a-CN nanocomposite films is investigated. The composition and structure of the Ni/a-CN nanocomposite films and porous carbon nitride (p-CN) films are determined by scan electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. Phase separated structure including nickel carbide phase and the surrounding amorphous carbon nitride (a-CN) matrix are detected for the as-deposited films. Though the bulk diffusion is introduced in the film during the annealing process, the grain sizes for the post-annealed films are around 10 nm and change little comparing with the ones of the as-deposited films, which is associated with the thermostability of the CN surrounding in the film. The p-CN skeleton with its pore size around 12.5 nm is formed by etching the post-annealed films, indicative of the stability of the phase separated structure during the annealing process.
- Publication:
-
Applied Surface Science
- Pub Date:
- May 2018
- DOI:
- 10.1016/j.apsusc.2017.12.210
- Bibcode:
- 2018ApSS..440..448Z
- Keywords:
-
- Porous carbon nitride;
- Annealing;
- Dealloying;
- Cathodic arc;
- Nickel