Pt-Decorated g-C3N4/TiO2 Nanotube Arrays with Enhanced Visible-Light Photocatalytic Activity for H2 Evolution

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• 作者：Prof. Dr. Zhi-Da Gao ; Yong-Fang Qu ; Xuemei Zhou ; Dr. Lei Wang ; Prof. Dr. Yan-Yan Song and Prof. Dr. Patrik Schmuki
• 刊名：ChemistryOpen
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：5
• 期：3
• 页码：197-200
• 全文大小：1039K
• ISSN：2191-1363

文摘

Aligned TiO₂ nanotube layers (TiNTs) grown by self-organizing anodization of a Ti-substrate in a fluoride-based electrolyte were decorated with graphitic-phase C₃N₄ (g-C₃N₄) via a facile chemical vapor deposition approach. In comparison with classical TiO₂ nanotubes (anatase), the g-C₃N₄/TiNTs show an onset of the photocurrent at 2.4 eV (vs. 3.2 eV for anatase) with a considerably high photocurrent magnitude in the visible range. After further decoration with Pt nanoparticles, we obtained a visible-light responsive platform that showed, compared with g-C₃N₄-free TiNTs, a strong enhancement for photoelectrochemical and bias-free H₂ evolution (15.62 μLh⁻¹ cm⁻²), which was almost a 98-fold increase in the H₂ production rate of TiNTs (0.16 μLh⁻¹ cm⁻²). In a wider context, the g-C₃N₄-combined 3 D nanoporous/nanotubular structure thus provides a platform with significant visible-light response in photocatalytic applications.