A simple and efficient strategy for the synthesis of a chemically tailored g-C₃N₄ material

Abstract

Schematic illustration of the tailored process from bulk g-C3N4 to two typical tailored morphologies (CNPSs and CNQDs) by treatment of different NH3/H2O2 volume ratios.

Enhancement of catalytic activity and oxidative ability for graphitic carbon nitride

“…Specifically, g-C3N4 nano-porous sheets are produced when moderate oxidation took place while quantum dots are obtained when further oxidation undergoes ( Figure 15). [19] The simple, safe and cheap tailored method outperforms previous complicated approaches with multiple templates. The tailored g-C3N4 shows a photoreactivity of H2 production 3.0 (pure water) and 4.1 (saturated KCl solution) times as much as bulk g-C3N4 under λ>420 nm.…”

“…[19] NH3 and H2O2 were used as controllable chemical scissors for tailored g-C3N4 which are easy and stable to process thanks to the significant reduced π-π stacking. All these factors make them ideal options for bottom-up production of tailored g-C3N4 nano-structures.…”

“…NH3 and H2O2 were also used as controllable chemical scissors to produce a wide range of g-C3N4 nano-structures, including exfoliation porous, quantum dots, nano-mites and nano-spindles. [19] Different nano-structures were developed with tailored g-C3N4, encompassing C3N3 and C6N7 ( Figure 15). H2O2 tends to heterolysis in an alkaline surrounding to produce a peroxide hydroxyl anion, giving C3N3 terminal groups to imine and subsequent oxidation of imine terminal groups, and rearrange to give C-OH terminal groups.…”

“…In addition, g-C3N4 is plentiful and can be made by one-step thermally condensing nitrogen-rich precursors such as cyanamide [5,7], dicyandiamide [8,9], melamine [10,11] and urea [12][13][14], thiourea [15,16]. Potential applications in hydrogen generation [5,[17][18][19][20][21][22][23][24][25], oxygen evolution [20,21,[26][27][28], carbon dioxide reduction [28][29][30][31][32][33][34][35][36][37], pollutant elimination [38][39][40][41][42][43][44][45][46][47][48][49][50]…”

“…Researchers have made great progress lately in designing g-C3N4 structure and investigating relations between morphology characteristics and photo-catalysis. A series of g-C3N4 materials with various structures have been developed, including 3D structure (porous structure and sphere structure) [38,39,[66][67][68][69], 2D structure (nano-sheet structure) [40,56,[70][71][72][73][74][75][76], 1D structure (nanorod structure, nanotube structure) [41,[77][78][79], 0D structure (quantum dot structure) [19,80], hybridized structure [45][46][47][81][82][83][84][85], core-shell structure [45,81,82] and 3D hydrogel structure [86,87] et al The structural design across the board will give novel ideas to produce high-powered g-C3N4 materials for the conversion of solar energy.…”