Gas-Phase Self-Assembly of Highly Ordered Titania@Graphene Nanoflakes for Enhancement in Photocatalytic Activity

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• 作者：Jeong Hoon Byeon ; Young-Woo Kim
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：May 8, 2013
• 年：2013
• 卷：5
• 期：9
• 页码：3959-3966
• 全文大小：495K
• 年卷期：v.5,no.9(May 8, 2013)
• ISSN：1944-8252

文摘

The gas-phase self-assembly of reduced graphene oxide (rGO) nanoflakes with highly ordered ultrafine titania (TiO₂) particles was performed and the resultant hybrid material displayed an enhanced photocatalytic performance, both in producing hydrogen and in degrading dyes. Freshly synthesized TiO₂ nanoparticles (35 nm in equivalent mobility diameter) were quantitatively incorporated with nanoscale rGO (36 nm in equivalent mobility diameter) in the form of TiO₂/rGO hybrid nanoflakes (31 nm in equivalent mobility diameter). The TiO₂/rGO hybrid flakes were finally employed to evaluate its photocatalytic activity, and it was found that the ability to achieve hydrogen production and dye degradation was greater than that of a hybridized material from commercial p25-TiO₂ and large rGO. This gas-phase self-assembly also enhanced the photocatalytic activity by applying different spark configurations to prepare ZnO, Au, or Ag particles incorporated with rGO nanoflakes.

Keywords:

aerosol fabrication; graphene; hybrid nanoparticles; photocatalytic performance; hydrogen production; dye degradation