CVD synthesis of graphene nanoplates on MgO support

Abstract

Synthesis of graphene directly on MgO has been carried out and the structural properties of the obtained material have been investigated. Few-layered graphene was produced by simple thermal decomposition of methane over MgO powder at 950°C in a CVD reactor. The samples were purified by 10 N HNO 3 treatment, and studied by TEM, Raman spectroscopy, EDAX and SEM. TEM clearly indicated the formation of graphene. EDAX showed that the purified sample contained only carbon and no traces of MgO. The characteristic Raman features of graphene were also seen as D-band at 1316 cm −1 , G-band at 1602 cm −1 , and a small 2D-band at 2700 cm −1 in the Raman spectra. The strong D-band suggests that the graphene possess large number of boundary defects. The small 2D-band indicates the formation of few-layered graphene.

TiO2/SGNs as photocatalyst for degradation of water pollutants

“…SGNs synthesis was carried out using CVD method with methane as the carbon precursor according to the reference reported [21,22]. The CVD setup (FURNACE 1,200°C, Tianjin Zhong Ring Experimental Electric Furnace Co., Ltd.) contains a horizontal tubular furnace and gas flow control unit.…”

N‐Doped and P‐Doped Graphene on MgO (111): A First‐Principles Study

“…[15] Experimental studies have shown that single-and multilayer graphene films can be grown directly on MgO substrates. [16][17][18][19][20][21][22] Gaddam et al, [16] prepared a single-layer graphene film on MgO(111) surface by the CVD method, and they found that the strong interaction between graphene and MgO can open the bandgap of graphene. Jerng et al, [18] used molecular beam epitaxy to directly grow graphene films on MgO (100) surface, and they observed clear D, G, and 2D bands by Raman spectroscopy.…”