Novel Synthetic Routes to Carbon-Nitrogen Thin Films

Adsorption studies of Pb(II) and Cu(II) ions on mesoporous carbon nitride functionalized with melamine-based dendrimer amine

“…The template carbon nitride polymer composites (dark-brown precipitate) were then heat-treated in a nitrogen flow at 600°C with a heating rate of 3.0°C/min and was kept under these conditions for 5 h to carbonize the polymer inside nitrogen furnace (Zheng et al 2010). The mesoporous carbon nitride was recovered after dissolution of the silica framework in 5 wt% hydrofluoric acid, followed by filtration by Büchner funnel and washing several times with ethanol and then drying at 100°C (Kouvetakis et al 1994). Black precipitate was obtained.…”

“…Generally, porous materials have found wide applications (Anbia and Hoseini 2012;Anbia et al 2010;Anbia and Moradi 2009). There are many reports on the synthesis of non-porous carbon nitride materials (Zimmerman et al 2001;Gillan 2000;Khabashesku et al 2000;Kouvetakis et al 1994). These materials can be synthesized from either chemical or molecular precursors at high temperature.…”

Pharaoh's Serpents: New Insights into a Classic Carbon Nitride Material

“…[1][2][3][4][5][6][7][8][9][10] They typically have compositions within the C-N-H system, close to that of Liebig's "melon" that has an ideal structural formula C 6 N 7 (NH)(NH 2 ), or C 2 N 3 H. [11] However, many reports equate the materials produced with pure C 3 N 4 , despite the fact that this H-free formulation has only been demonstrated in a very few instances. [12,13] This interest in producing C 3 N 4 varieties was first stimulated by theoretical predictions that an sp 3 bonded framework structure might have "superhard" properties comparable to diamond, [14] but recent research has focused on graphitic layered structures based on sp 2 bonding. [13,[15][16][17] Interestingly, it has also been predicted that open framework varieties containing mixed sp 2 as well as sp 3 bonded units could exist.…”

Reexamination of Solvothermal Synthesis of Layered Carbon Nitride

“…Figure 2 shows the FT-IR spectrum of the sample synthesized by heating for 24 hours following the recipe of Guo et al [18], in which strong absorptions are observed in the range of 800-1800 and 2800-3600 cm −1 . Since inplane C-N stretching and bending vibration modes of the striazine-based g-C 3 N 4 show broad bands at 1150-1650 cm −1 region [8,35], the several bands observed in the 1400-1600 cm −1 region (two intense peaks at 1432 and 1568 cm −1 ) are likely attributed to the stretching vibration mode of CN as well as the deformation mode of NH 2 [14,35]. Although Larkin et al [37] pointed out that CN ring deformation mode generates the IR absorption peaks at 675 and 748 cm −1 , these peaks were not observed in this study.…”

“…In the past few decades, g-C 3 N 4 attracted considerable attention in industrial applications such as photocatalyst (e.g., [4]), hydrogen storage (e.g., [5]), semiconductor (e.g., [6]), and a starting material for synthesizing potential superhard carbon nitride phases (e.g., [7]). A number of reports have been published for the synthesis of g-C 3 N 4 and even other graphitic forms with nonstoichiometric compositions on the basis of various techniques such as CVD [8][9][10], solid reaction [11][12][13][14][15][16][17], solvothermal method [18][19][20][21][22], and thermal decomposition of compounds [23][24][25][26]. Among these, one of the easiest and simplest ways to obtain a nanocrystalline powder of g-C 3 N 4 is the solvothermal method, in which the synthesis is achieved through the reaction of chemical sources in a solvent such as benzene and acetonitrile at high temperatures.…”