Nanostructured TiO2/Polypyrrole for Visible Light Photocatalysis

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• 作者：Nada M. Dimitrijevic ; Sanja Tepavcevic ; Yuzi Liu ; Tijana Rajh ; Sunshine C. Silver ; David M. Tiede
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：August 1, 2013
• 年：2013
• 卷：117
• 期：30
• 页码：15540-15544
• 全文大小：290K
• 年卷期：v.117,no.30(August 1, 2013)
• ISSN：1932-7455

文摘

Stable TiO₂/polypyrrole nanocomposites have been synthesized by a simple one-step hydrothermal method. The nanocomposites are capable of efficient visible-light photocatalysis driven by their morphology that utilizes a high concentration of 4.5 nm TiO₂ nanoparticles electronically coupled to 200鈥?00 nm polypyrrole granules. The polypyrrole acts as visible-light photosensitizer, and the photoactivity of nanocomposite arises from the electron transfer from excited polypyrrole to TiO₂ nanoparticles and further across nanocomposite interface. The visible-light photocatalysis is demonstrated by methylene blue degradation and by the production of H₂ from water with efficiency of 1 mmol H₂ g_catalyst^鈥? h^鈥? wt %(Pt)^鈭?.