Details

Autor(en) / Beteiligte

• Huang, Chi-Hsien
• Lu, Yu-Jen
• Pan, Yong-Chen
• Liu, Hui-Ling
• Chang, Jia-Yuan
• Sie, Jhao-Liang
• Pijanowska, Dorota G
• Yang, Chia-Ming

Titel

Nanohollow Titanium Oxide Structures on Ti/FTO Glass Formed by Step-Bias Anodic Oxidation for Photoelectrochemical Enhancement

Ist Teil von

• Nanomaterials (Basel, Switzerland), 2022-06, Vol.12 (11), p.1925

Ort / Verlag

Switzerland: MDPI AG

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Electronic Journals Library

Beschreibungen/Notizen

• In this study, a new anodic oxidation with a step-bias increment is proposed to evaluate oxidized titanium (Ti) nanostructures on transparent fluorine-doped tin oxide (FTO) on glass. The optimal Ti thickness was determined to be 130 nm. Compared to the use of a conventional constant bias of 25 V, a bias ranging from 5 V to 20 V with a step size of 5 V for 3 min per period can be used to prepare a titanium oxide (TiO ) layer with nanohollows that shows a large increase in current of 142% under UV illumination provided by a 365 nm LED at a power of 83 mW. Based on AFM and SEM, the TiO grains formed in the step-bias anodic oxidation were found to lead to nanohollow generation. Results obtained from EDS mapping, HR-TEM and XPS all verified the TiO composition and supported nanohollow formation. The nanohollows formed in a thin TiO layer can lead to a high surface roughness and photon absorbance for photocurrent generation. With this step-bias anodic oxidation methodology, TiO with nanohollows can be obtained easily without any extra cost for realizing a high current under photoelectrochemical measurements that shows potential for electrochemical-based sensing applications.