Selective synthesis of borated meso-macroporous and mesoporous spherical TiO₂ with high photocatalytic activity

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• 作者：Hailong Fei ; Yuping Liu ; Yingpin Li ; Pingchuan Sun ; Zhongyong Yuan ; Baohui Li ; Datong Ding ; Tiehong Chen
• 关键词：Mesoporous ; Macroporous ; Borated titania ; Sphere ; Rhodamine B
• 刊名：Microporous and Mesoporous Materials
• 出版年：2007
• 出版时间：4 May 2007
• 年：2007
• 卷：102
• 期：1-3
• 页码：318-324
• 全文大小：934 K

文摘

A facile and template-free approach was used to synthesize borated meso-macroporous TiO₂ via adding TBT to boric solution following calcination. Borated mesoporous TiO₂ solid sphere was obtained via adding the mixture of TBT and n-butanol under identical condition. Both borated meso-macroporous and mesoporous spherical TiO₂ are of anatase, as proved by the XRD measurements. FT-IR and XPS results showed that boron might be incorporated in the TiO₂ with the formation of B–O–Ti bonds. SEM results indicate macroporous and spherical structure with a diameter of ca. 3 μm. TEM and N₂ adsorption verified the existence of mesopore. The average pore sizes and BET surface areas are 3.1 nm, 5.7 nm and 148 m²/g, 64 m²/g for borated meso-macroporous and mesoporous spherical TiO₂, respectively. Both materials showed good photocatalytic activity for degrading rhodamine B (RhB) under exposure to UV light. Borated mesoporous TiO₂ sphere showed higher photocatalytic activity than commercial photocatalyst P25.