Design, synthesis of uniform Au nanoparticles modified Fe2O3-TiO2 coaxial nanotubes and their enhanced thermal stability and photocatalytic activity

作者：An, Huiqin^*; He, Xiaoling; Li, Jiaquan; Zhao, Lizhi; Chang, Cheng; Zhang, Saihui; Huang, Weiping

来源：New Journal of Chemistry, 2015, 39(6): 4611-4623.

DOI：10.1039/c5nj00239g

• DOPED TIO2 NANOTUBES
• EXPOSED 001 FACETS
• VISIBLE-LIGHT
• IN-SITU
• TITANIUM-DIOXIDE
• SILVER NANOPARTICLES
• DYE INTERMEDIATE
• GRAPHENE OXIDE
• GOLD PARTICLES
• DEGRADATION

Iron-coated TiO2 coaxial nanotubes (Fe2O3/TiO2 nanotubes) synthesized by treating TiO2 nanotubes with Fe(OH)(3) sol are used as a support, and gold nanoparticles are loaded on the support by a simple one-pot strategy using lysine as both the linker and the capping agent. The obtained Au/Fe2O3/TiO2 hybrid nanotube materials are characterized by TEM, XRD, XPS, UV-vis, AAS and nitrogen adsorption. The photocatalytic performance is evaluated by the photocatalytic degradation rates of methyl orange under UV light irradiation. The effects of Au content, the absence/presence of lysine and Fe2O3, the pH value of solution and the addition amount of H2O2 to solution on the photocatalytic performance of Au/Fe2O3/TiO2 nanotubes are investigated. The results reveal that gold nanoparticles capped by lysine can be highly dispersed on the supports against aggregation, and the products exhibit higher thermal stability and photocatalytic activity in comparison to pristine TiO2 nanotubes.

• 出版日期2015
• 单位南开大学; 天津工业大学