BiOBr/protonated graphitic C3N4 heterojunctions: Intimate interfaces by electrostatic interaction and enhanced photocatalytic activity

Characterization of urea derived polymeric carbon nitride and resultant thermally vacuum deposited amorphous thin films: Structural, chemical and photophysical properties

“…Two pronounced peaks were observed at 27.47 and 13.13° in p-CN diffraction pattern corresponding to the interlayer stacking peak of aromatic systems and the in-plane structural packing motif of tri-s-triazine units [36], respectively, which is in consistence with the reported p-CN derived from thermal decomposition of urea [8,33,34]. It is important to note that very similar diffraction patterns with practically identical peak positions were obtained via thermal treatment (temperature range of 520-550 ºC) of melamine [23,25,26,56] and dicyandiamide [11,13,16,18] as source materials. The initial molecular structure of p-CN was reconstructed from [44].…”

“…The p-CN only consists of abundant elements in a tri-s-triazine ring structure as elementary building block. It can be synthesized via a straightforward and scalable process from relatively cheap source materials such as dicyandiamide [10][11][12][13][14][15][16][17][18], cyanamide [19], ammonium thiocyanate [20], melamine [21][22][23][24][25][26][27][28][29][30], urea [8,9,[31][32][33][34][35][36], thiourea [28], guanidine carbonate [37] and thiosemicarbazide [38]. Generally, synthesis methods of p-CN involve thermal treatment of precursor material in the temperature range of 450-650 °C.…”

Preparation of flower-like BiOBr–WO 3 –Bi 2 WO 6 ternary hybrid with enhanced visible-light photocatalytic activity

“…The CB edge of BiOBr (0.28 eV vs NHE) [25] lie below that of Bi 2 WO 6 (0.24 eV vs NHE) and above that of WO 3 (0.74 eV vs NHE). Therefore, through the interfacial potential gradient in the conduction bands, the photogenerated electrons can easily transfer from Bi 2 WO 6 to BiOBr and then to WO 3 .…”

Facile fabrication of novel porous graphitic carbon nitride/copper sulfide nanocomposites with enhanced visible light driven photocatalytic performance

“…In order to overcome these drawbacks, several routes have been developed to further enhance the photocatalytic activity of g-C 3 N 4 , like doping some elements [11,12], loading some noble metal [13,14] or combining with heterogeneous semiconductors [15,16]. In particular, forming a heterojunction with g-C 3 N 4 , such as g-C 3 N 4 /SrTiO 3 [17], g-C 3 N 4 /SnO 2 [18], g-C 3 N 4 /ZnO [19], g-C 3 N 4 /TiO 2 [20], g-C 3 N 4 /CdS [21] and g-C 3 N 4 /BiOBr [22], is an effective strategy to enhance the photocatalytic activity. Unfortunately, most of them either could not remarkable extend the optical absorption, or ignore the influence of structure and morphology of g-C 3 N 4 to the photocatalytic properties.…”