Nanostructured 2D Diporphyrin Honeycomb Film: Photoelectrochemistry, Photodegradation, and Antibacterial Activity

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• 作者：Yuewu Zhao ; Qiuwei Shang ; Jiachao Yu ; Yuanjian Zhang ; Songqin Liu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：June 10, 2015
• 年：2015
• 卷：7
• 期：22
• 页码：11783-11791
• 全文大小：482K
• ISSN：1944-8252

文摘

Surface patterns of well-defined nanostructures play important roles in fabrication of optoelectronic devices and applications in catalysis and biology. In this paper, the diporphyrin honeycomb film, composed of titanium dioxide, protoporphyrin IX, and hemin (TiO₂/PPIX/Hem), was synthesized using a dewetting technique with the well-defined polystyrene (PS) monolayer as a template. The TiO₂/PPIX/Hem honeycomb film exhibited a higher photoelectrochemical response than that of TiO₂ or TiO₂/PPIX, which implied a high photoelectric conversion efficiency and a synergistic effect between the two kinds of porphyrins. The TiO₂/PPIX/Hem honeycomb film was also a good photosensitizer due to its ability to generate singlet oxygen (¹O₂) under irradiation by visible light. This led to the use of diporphyrin TiO₂/PPIX/Hem honeycomb film for the photocatalytic inactivation of bacteria. In addition, the photocatalytic activities of other metal-diporphyrin-based honeycomb films, such as TiO₂/MnPPIX/Hem, TiO₂/CoPPIX/Hem, TiO₂/NiPPIX/Hem, TiO₂/CuPPIX/Hem, and TiO₂/ZnPPIX/Hem, were investigated. The result demonstrated that the photoelectric properties of diporphyrin-based film could be effectively enhanced by further coupling of porphyrin with metal ions. Such enhanced performance of diporphyrin compounds opened a new way for potential applications in various photoelectrochemical devices and medical fields.