Polymeric g-C3N4 Coupled with NaNbO3 Nanowires toward Enhanced Photocatalytic Reduction of CO2 into Renewable Fuel

详细信息    查看全文

• 作者：Haifeng Shi ; Guoqing Chen ; Chengliang Zhang ; Zhigang Zou
• 刊名：ACS Catalysis
• 出版年：2014
• 出版时间：October 3, 2014
• 年：2014
• 卷：4
• 期：10
• 页码：3637-3643
• 全文大小：443K
• ISSN：2155-5435

文摘

Visible-light-responsive g-C₃N₄/NaNbO₃ nanowires photocatalysts were fabricated by introducing polymeric g-C₃N₄ on NaNbO₃ nanowires. The microscopic mechanisms of interface interaction, charge transfer and separation, as well as the influence on the photocatalytic activity of g-C₃N₄/NaNbO₃ composite were systematic investigated. The high-resolution transmission electron microscopy (HR-TEM) revealed that an intimate interface between C₃N₄ and NaNbO₃ nanowires formed in the g-C₃N₄/NaNbO₃ heterojunctions. The photocatalytic performance of photocatalysts was evaluated for CO₂ reduction under visible-light illumination. Significantly, the activity of g-C₃N₄/NaNbO₃ composite photocatalyst for photoreduction of CO₂ was higher than that of either single-phase g-C₃N₄ or NaNbO₃. Such a remarkable enhancement of photocatalytic activity was mainly ascribed to the improved separation and transfer of photogenerated electron鈥揾ole pairs at the intimate interface of g-C₃N₄/NaNbO₃ heterojunctions, which originated from the well-aligned overlapping band structures of C₃N₄ and NaNbO₃.

Keywords:

sodium niobate; composite photocatalysts; g-C₃N₄; CO₂ conversion; nanowires