Noncatalytic synthesis of carbon‐nitride nanocolumns by dc magnetron sputtering

Abstract

Carbon‐nitride nanocolumns were produced without catalyst metal by dc magnetron sputtering of a graphite target in pure N2 gas at pressure of 26.0 Pa on a quartz glass substrate kept at ∼200 °C. The nitrogen/carbon ratio in nanocolumns equals 0.18. Scanning electron microscopy shows that films represent dense nanostructure with columns ∼70–80 nm in diameter. The main fraction of the nitrogen is sp2‐coordinated by carbon and enters into the graphene layers as substitutional atoms; the other fraction of the nitrogen facilitates a cross‐linking between the graphene layers through sp3‐coordinated carbon.

Polymeric Graphitic Carbon Nitride for Heterogeneous Photocatalysis

“…A more detailed discussion of actual synthesis routes will be presented below, but it is interesting to recognize that this polymeric semiconductor is composed of mainly carbon and nitrogen, for which organic chemistry provides reactions and tools to modify its reactivity without having to change the overall composition too much. Indeed, reports on approaching the synthesis of different modifications and the elucidation of the composition and structure of carbon nitride materials abound in the literature. − Its potential applications in energy conversion, , hydrogen − and carbon dioxide storage, purification of contaminated water, in solar cells, − and as humidity and gas sensors, , etc. have also been reported.…”

Effect of in situ ultraviolet irradiation on the formation of nanostructural carbon nitride films

“…The substrate surface was cleaned with a vapor of isopropyl alcohol before deposition of the films. We used the dc planar magnetron with a flat cathode and a ring anode 10. The target‐to‐substrate distance was 2.5 cm, the substrate holder was grounded.…”

Molecular dynamics simulations of nanosheets of polymeric carbon nitride and comparison with experimental observations

“…The various existing synthesis routes provide predominantly amorphous samples structured at the nanoscale level as graphite-like (15), nanosheets (16)(17)(18)(19), nanotubes (20), or nanopillars (21)(22). They can also be structured in mesoporous conformations that lead to new applications, like the generation of nanostructured metal nitrides (23).…”