Femtosecond Laser Fabrication of Anatase TiO2 Micro-nanostructures with Chemical Oxidation and Annealing

Scientific Reports
Ting HuangQiang Wu

Abstract

The fabrication of nanoporous anatase TiO2 on a microstructured Ti base is achieved through an innovative hybrid fabrication method involving femtosecond laser ablation coupled with H2O2 oxidation and annealing. The anatase TiO2 micro-nanostructures have superior photocatalytic degradation of methyl orange due to enhanced light harvesting capacity and surface area. The photodegradation efficiency increases by a maximum of 80% compared to the nanoporous anatase TiO2 fabricated through H2O2 oxidation and annealing only (without femtosecond laser ablation). Meanwhile, The anatase TiO2 micro-nanostructures show good cyclic performance, indicating a great potential for practical application. The proposed hybrid method can easily tune the morphology and size of microstructure by simply adjusting the femtosecond laser parameters, showing advantage in fabricating of micro-nanostructures with a rich variety of morphologies.

References

Mar 26, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Jiandong ZhuangDonghui Wang
Oct 18, 2011·Nano Letters·In Sun ChoXiaolin Zheng
Sep 3, 2013·Nature Materials·Muhammed M Ottakam ThotiylPeter G Bruce
Sep 4, 2013·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Tianyi ZhaoLei Jiang
Feb 5, 2014·ACS Applied Materials & Interfaces·Junye DongWei Gao
Aug 20, 2014·Chemical Reviews·Dina Fattakhova-RohlfingThomas Bein
May 15, 2015·Applied Optics·Huan HuangJian Liu

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Methods Mentioned

BETA
X-ray
confocal microscopy

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