In Situ Formation of Heterojunctions in Modified Graphitic Carbon Nitride: Synthesis and Noble Metal Free Photocatalysis

Abstract

Herein we report the facile synthesis of an efficient roll-like carbon nitride (C 3 N 4 ) photocatalyst for hydrogen production using a supramolecular complex composed of

Color‐Tunable Photoluminescence and NIR Electroluminescence in Carbon Nitride Thin Films and Light‐Emitting Diodes

“…As shown recently, nitrogen vacancies could be a defect responsible for the redshifted absorption and PL. [ 30 ] Furthermore it provides direct evidence for a recently proposed energetic model of carbon nitride powders heated to different temperatures. The model not only successfully explains the redshift and peak broadening of the PL in Figure 2 c and the EL shift to the NIR, but it also offers an explanation for the increased photocatalytic activity found in BA-modifi ed C 3 N 4 powders.…”

Condensed and low-defected graphitic carbon nitride with enhanced photocatalytic hydrogen evolution under visible light irradiation

“…Impressively, the intensity of the main (002) peak 10 is much increased and becomes narrower, indicating much higher long-range order of the interplanar structure packing in the g-C 3 N 4 sheets. In addition, the (002) peak displays a slight shift to higher angles from 27.3° to 27.6°, corresponding to a reduction in the stacking distance from 0.326 to 0.322 nm of graphitic layered structure [35]. According to Bragg's law, this up-shift indicates the slightly more dense packing of the conjugated systems than the pristine g-C 3 N 4 produced by the ammonia polymerization [36].…”

Semi‐heterogeneous Dual Nickel/Photocatalysis using Carbon Nitrides: Esterification of Carboxylic Acids with Aryl Halides

“…g-CN polymers are easy to synthesize from commodity chemicals,and exhibit high thermal and chemical stability.T he band gap and position of the valence and conduction band depend on several factors such as the C/N ratio,t he polymerization degree,and the the crystallinity,all of which can be tailored by the synthetic approach. Mesoporous graphitic carbon nitride (mpg-CN), [10] am odified carbon nitride derived from ac yanuric acid/melamide/barbituric acid complex (CMB 0.05 -CN), [11] as ulfur-doped material (CNS 600 ), [12] and the strongly oxidizing potassium poly(heptazine imide) (K-PHI), [13] gave 12-15 %o fe ster 1.Acarbon nitride derivative prepared through co-condensation of urea and oxamide followed by post-calcination in am olten salt (CN-OA-m) [14] showed the highest activity in the photocatalyst screening, [15] presumably due to its enhanced optical absorption in the visible region compared to most other known CN materials ( Figure S1 in the Supporting Information). Carbon nitride materials can catalyze esterification between N-(tert-butoxycarbonyl)-proline (Boc-Pro-OH) and methyl 4-iodobenzoate under white-LED (RGB) irradiation (Table 1).…”