TiO2–g-C3N4 composite materials for photocatalytic H2 evolution under visible light irradiation

Fabrication, characterization, and photocatalytic performance of exfoliated g-C3N4–TiO2 hybrids

“…3. For the spectrum of bare CNs, two broad and pronounced peaks at 3200 cm −1 and 3400 cm −1 originate from stretching vibrations of N H and O H, corresponding to residual amino groups attached to sp 2 hybridized carbons and absorbed H 2 O molecules on the surface, respectively [3]. Several intense adsorption peaks in the region of 1200-1640 cm −1 are corresponding to the typical stretching modes of aromatic CN heterocycles [29].…”

“…Among all semiconductors used as photocatalysts, TiO 2 has attracted much attention from numerous researchers due to those favorable physicochemical properties [2]. However, TiO 2 fails to catalyze degradation of environmental contaminations upon visible light irradiation and can only exert photocatalysis in presence of ultraviolet light that takes up merely 4% of solar energy, attributing to the large band gap energy of 3.2 eV [2,3]. In addition, high recombination rate of photoinduced hole-electron pairs is another factor limiting its practical applications.…”

“…Several investigations have reported that composites of bulk g-C 3 N 4 and TiO 2 structures of both semiconductors are well matched and readily form heterojunction interfaces along boundaries [3,[18][19][20][21][22]. Yan et al reported that g-C 3 N 4 -TiO 2 composites prepared in a direct grind manner could catalyze hydrogen evolution under visible light [3].…”

“…Yan et al reported that g-C 3 N 4 -TiO 2 composites prepared in a direct grind manner could catalyze hydrogen evolution under visible light [3]. Miranda et al demonstrated that g-C 3 N 4 -TiO 2 composites by a simple impregnation method exhibited improved photocatalytic activity upon degradation of phenol [19].…”

Synthesis of composite photocatalyst based on carbon nitride intercalation compound (CNIC) for the reduction of greenhouse gases

“…many oxide composite photocatalysts fabricated by solid state sintering can offer the driving forces for separation and transfer of photogenerated electron-hole pairs. The heterojunction semiconductors can be composite of an ultraviolet-light-driven and a visible light-driven photocatalyst, such as TiO 2 -g-C 3 N 4 composite [5], however, the ultraviolet-visible light irradiation was needed for inducing the photocatalytic reactions. And some visible lightdriven composite photocatalysts, such as C 3 N 4 -TaON [6], graphene/C 3 N 4 [7] and g-C 3 N 4 /Bi 2 WO 6 [8], have been synthesized.…”