ZnO–graphene composite for photocatalytic degradation of methylene blue dye

Fabrication of ZnO/graphene flake-like photocatalyst with enhanced photoreactivity

“…However, the quantum efficiency of ZnO is rather low due to the fast recombination of photoinduced electron-hole pairs [3]. It has also been reported that the photocatalytic activity and stability of ZnO decreased dramatically because of photocorrosion effects during light irradiation.…”

“…Since the discovery of graphene in 2004, a great deal of work has been done on the synthesis of graphene/semiconductor composite [3,[9][10][11][12][13][14][15][16][17][18]. Graphene owns a unique two-dimensional layer structure of sp 2 -hybridized carbon atoms and exhibits novel electronic property such as zero-bandgap, high transparency, and highly electronic conductivity for storing and transporting electrons due to its one-atom thickness and large theoretical specific surface area [19][20][21].…”

“…For example, Fan et al [3]. and Zhang et al [22] successfully prepared ZnO-graphene composite by using GO A c c e p t e d M a n u s c r i p t 4 the defect sites and tend to form a discontinuous island-like domain array to minimize the unfavorable graphene-oxide interfaces [30].…”

Ultrasound assisted synthesis of ZnO/reduced graphene oxide composites with enhanced photocatalytic activity and anti-photocorrosion

“…The raman spectrum of GO exhibits two major peaks at 1350 cm -1 (D band) and at 1596cm -1 (G band), which are usually assigned to the breathing mode of K-point phonons of A1g symmetry and the E2g phonon of sp 2 bonds of carbon atoms, respectively.The D band and G band are also observed in the Raman spectra of rGO and ZnO/rGO02 composite. But the intensity ratio of I D /I G increases from 0.94 to 1.07, which shows that more sp 2 domains (graphene sheets) have formed and the GO has been reduced [23].…”

Enhanced Photocatalytic Performance of ZnO through Coupling with Carbon Materials

“…Recently, coupling carbon materials (for example, fullerene, carbon nanotube, graphene) with ZnO has been reported successfully for improving the photocatalytic performance of ZnO. [37][38][39][40][41] However, until now, few reviews focus on ZnO-based carbon photocatalysts. This paper affords recent developments on photocatalytic applications of ZnO-based carbon composites.…”