Long Persistent Phosphor CdSiO3:Gd3+,Bi3+ and Potential Photocatalytic Application of CdSiO3:Gd3+,Bi3+@TiO2 in Dark

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• 作者：Pengfei Feng ; Yudong Wei ; Yanan Wang ; Jiachi Zhang ; Huihui Li and Zhipeng Ci
• 刊名：Journal of the American Ceramic Society
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：99
• 期：7
• 页码：2368-2375
• 全文大小：1529K
• ISSN：1551-2916

文摘

To support photocatalytic decomposition of TiO₂ in low-transparent wastewaters or in the dark, we develop a novel ultraviolet emitting long persistent phosphor CdSiO₃:Gd³⁺,Bi³⁺, which the persistent luminescence can last for more than 6 h (0.32 mcd/m²). Approximately 68.7% of the spectral areas of the optimal sample can well match the absorption band of TiO₂. The long persistent luminescent mechanism is discussed in details. The investigations of decomposition of methylene blue by CdSiO₃:Gd³⁺,Bi³⁺@TiO₂ composite reveals that the long persistent luminescence of CdSiO₃:Gd³⁺,Bi³⁺ can not only support the photocatalytic activity of TiO₂ in the dark but also significantly increases the photocatalytic efficiency under ultraviolet irradiation. Thus, the CdSiO₃:Gd³⁺,Bi³⁺@TiO₂ composite is potentially used as functional photocatalyst to treat the organic pollutants in low-transparent wastewater or in the dark.