Synergistic effect of efficient adsorption g-C₃N₄/ZnO composite for photocatalytic property

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• 作者：Xuefei Li ; Ming Li ; Jinghai Yang ; Xiuyan Li ; Tingjing Hu ; Jingshu Wang ; Yingrui Sui ; Xingtong Wu ; Lingnan Kong
• 关键词：A. Optical materials ; B. Chemical synthesis ; C. Infrared spectroscopy ; D. Optical properties
• 刊名：Journal of Physics and Chemistry of Solids
• 出版年：March, 2014
• 年：2014
• 卷：75
• 期：3
• 页码：441-446
• 全文大小：1942 K

文摘

Novel g-C₃N₄/ZnO composite photocatalyst was synthesized from an oxygen-containing precursor by direct thermal decomposition urea in air without any other templates assistance. Different percentages of g-C₃N₄ were hybridized with ZnO via the monolayer-dispersed method. The prepared g-C₃N₄/ZnO composites were characterized by XRD, SEM, UV-vis diffuse reflectance spectra (DRS), FT-IR, TEM and XPS. The composites showed much higher efficiency for degradation of Rhodamine B (RhB) than ZnO under UV and visible light irradiation. Especially, the photocatalytic efficiency was the highest under UV light irradiation when the percentage of g-C₃N₄ was 6%. The improved photocatalytic activity may be due to synergistic effect of photon acquisition and direct contact between organic dyestuff and photocatalyst. Then, effective separation of photogenerated electron-hole pairs at the interface of g-C₃N₄ is an important factor for improvement of photocatalytic activity. This work indicates that g-C₃N₄ hybrid semiconductors photocatalyst is a promising material in pollutants degradation.