Effect of Nature and Location of Defects on Bandgap Narrowing in Black TiO2 Nanoparticles
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- 作者：Alberto Naldoni ; Mattia Allieta ; Saveria Santangelo ; Marcello Marelli ; Filippo Fabbri ; Serena Cappelli ; Claudia L. Bianchi ; Rinaldo Psaro ; Vladimiro Dal Santo
- 刊名：The Journal of the American Chemical Society
- 出版年：2012
- 出版时间：May 9, 2012
- 年：2012
- 卷：134
- 期：18
- 页码：7600-7603
- 全文大小：326K
- 年卷期：v.134,no.18(May 9, 2012)
- ISSN：1520-5126
文摘
The increasing need for new materials capable of solar fuel generation is central in the development of a green energy economy. In this contribution, we demonstrate that black TiO2 nanoparticles obtained through a one-step reduction/crystallization process exhibit a bandgap of only 1.85 eV, which matches well with visible light absorption. The electronic structure of black TiO2 nanoparticles is determined by the unique crystalline and defective core/disordered shell morphology. We introduce new insights that will be useful for the design of nanostructured photocatalysts for energy applications.