鈥淏lack鈥?TiO2 Nanotubes Formed by High-Energy Proton Implantation Show Noble-Metal-co-Catalyst Free Photocatalytic H2-Evolution

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• 作者：Ning Liu ; Volker H盲ublein ; Xuemei Zhou ; Umamaheswari Venkatesan ; Martin Hartmann ; Mirza Ma膷kovi膰 ; Tomohiko Nakajima ; Erdmann Spiecker ; Andres Osvet ; Lothar Frey ; Patrik Schmuki
• 刊名：Nano Letters
• 出版年：2015
• 出版时间：October 14, 2015
• 年：2015
• 卷：15
• 期：10
• 页码：6815-6820
• 全文大小：408K
• ISSN：1530-6992

文摘

We apply high-energy proton ion-implantation to modify TiO₂ nanotubes selectively at their tops. In the proton-implanted region, we observe the creation of intrinsic cocatalytic centers for photocatalytic H₂-evolution. We find proton implantation to induce specific defects and a characteristic modification of the electronic properties not only in nanotubes but also on anatase single crystal (001) surfaces. Nevertheless, for TiO₂ nanotubes a strong synergetic effect between implanted region (catalyst) and implant-free tube segment (absorber) can be obtained.