Enhanced Charge Separation in Nanostructured TiO2 Materials for Photocatalytic and Photovoltaic Applications

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• 作者：He He ; Chao Liu ; Kevin D. Dubois ; Tong Jin ; Michael E. Louis ; Gonghu Li
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：September 19, 2012
• 年：2012
• 卷：51
• 期：37
• 页码：11841-11849
• 全文大小：388K
• 年卷期：v.51,no.37(September 19, 2012)
• ISSN：1520-5045

文摘

Titanium dioxide (TiO₂) has been extensively investigated in solar energy applications, including heterogeneous photocatalysis and photovoltaics. For most TiO₂ materials, charge recombination between photoexcited electrons and holes severely limits the efficiencies of solar energy conversion. Different strategies have been attempted to improve charge separation in TiO₂ materials. This review focuses on three effective approaches to achieve enhanced charge separation by constructing mixed-phase TiO₂, highly dispersed titanium oxides, and nanotubular TiO₂ materials. Selected examples from the literature are discussed to demonstrate how the three approaches could be implemented in the context of photocatalytic water splitting, photocatalytic CO₂ reduction, and dye-sensitized solar cells. The discussion provides useful insights regarding the design of new TiO₂ nanostructures for use in solar energy conversion.