Two New Armtype Polyoxometalates Grafted on Titanium Dioxide Films: Towards Enhanced Photoelectrochemical Performance

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• 作者：Hang Sun ; Li-Ying Guo ; Dr. Jian-Sheng Li ; Jian-Ping Bai ; Dr. Fang Su ; Prof. Lan-Cui Zhang ; Dr. Xiao-Jing Sang ; Prof. Wan-Sheng You and Prof. Zai-Ming Zhu
• 刊名：ChemSusChem
• 出版年：2016
• 出版时间：May 23, 2016
• 年：2016
• 卷：9
• 期：10
• 页码：1125-1133
• 全文大小：1458K
• ISSN：1864-564X

文摘

Two new carboxyethyltin-functionalized polyoxometalates (POMs) were successfully obtained and confirmed with physicochemical and spectroscopic methods including X-ray crystallography. The lowest unoccupied molecular orbitals of both compounds are higher in energy than that of TiO₂, and the optical band gaps of these compounds are smaller than that of TiO₂. Grafting them onto a TiO₂ film created two kinds of novel photoanode materials that showed significantly enhanced photovoltaic and photocurrent responses, as well as improved photoelectrooxidation activities for methanol relative to that shown by a single TiO₂ film. Further, P₂W₁₅-Co-SnR produced the largest photocurrent by exploring the photoelectric activities of a series of carboxyethyltin POM derivatives. This work provides new insight into the photoelectrochemical functionalization of POM-based organic–inorganic hybrids.