Room temperature one-step synthesis of microarrays of N-doped flower-like anatase TiO2 composed of well-defined multilayer nanoflakes by Ti anodization

Chenglin Wang; Mengye Wang; Kunpeng Xie; Qi Wu; Lan Sun; Zhiqun Lin; Changjian Lin

doi:10.1088/0957-4484/22/30/305607

Room temperature one-step synthesis of microarrays of N-doped flower-like anatase TiO2 composed of well-defined multilayer nanoflakes by Ti anodization

Nanotechnology. 2011 Jul 29;22(30):305607. doi: 10.1088/0957-4484/22/30/305607. Epub 2011 Jul 1.

Authors

Chenglin Wang¹, Mengye Wang, Kunpeng Xie, Qi Wu, Lan Sun, Zhiqun Lin, Changjian Lin

Affiliation

¹ Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China.

PMID: 21719961
DOI: 10.1088/0957-4484/22/30/305607

Abstract

Microarrays of N-doped flower-like TiO(2) composed of well-defined multilayer nanoflakes were synthesized at room temperature by electrochemical anodization of Ti in NH(4)F aqueous solution. The TiO(2) flowers were of good anatase crystallinity. The effects of anodizing time, applied voltage and NH(4)F concentration on the flower-like morphology were systematically examined. It was found that the morphologies of the anodized Ti were related to the anodizing time and NH(4)F concentration. The size and density of the TiO(2) flowers could be tuned by changing the applied voltage. The obtained N-doped flower-like TiO(2) microarrays exhibited intense absorption in wavelengths ranging from 320 to 800 nm. Under both UV and visible light irradiation, the photocatalytic activity of the N-doped flower-like TiO(2) microarrays in the oxidation of methyl orange showed a significant increase compared with that of commercial P25 TiO(2) film.