Tuning the Morphology of g-C3N4 for Improvement of Z-Scheme Photocatalytic Water Oxidation

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• 作者：Xiaofei Yang ; Zupeng Chen ; Jingsan Xu ; Hua Tang ; Kangmin Chen ; Yan Jiang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：July 22, 2015
• 年：2015
• 卷：7
• 期：28
• 页码：15285-15293
• 全文大小：680K
• ISSN：1944-8252

文摘

Solar-driven water oxidation is the key step for overall water splitting that efficiently harvests and converts solar energy into fuels; the development of a highly efficient photocatalyst that can mediate water oxidation has become an appealing challenge. Herein, we report a facile two-step process to decorate silver phosphate (Ag₃PO₄) particles on different types of graphitic carbon nitrides (g-C₃N₄) as composite photocatalysts for water oxidation. For all the Ag₃PO₄/g-C₃N₄ materials, an in situ Z-scheme is created by the generation of Ag nanoparticles which act as a cross-linking bridge between Ag₃PO₄ and g-C₃N₄ in the composite, resulting in better charge separation and higher catalytic performance. A detailed analysis emphasizes the importance of the g-C₃N₄ on the chemical, photophysical, and catalytic properties of the composite materials. Our results show that the alteration of the morphology dominates the performance of the composite materials.