XRD红固体超强酸纳米光催化剂SO_4_2_TiO_2的制备及Ag改性.pdf
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化 工 进 展
2006 年第25 卷第4 期 CHEMICAL INDUSTRY AND ENGINEERING PROGRESS ·411 ·
研究开发
固体超强酸纳米光催化剂SO 2 -TiO2 的制备及Ag 改性
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刘 红,刘 潘,辜孔良,李 晶,孙 旋
(武汉科技大学资源与环境学院,武汉 430081 )
摘 要:以钛酸丁酯为原料,通过在TiO2 溶胶中添加质量分数为49%的硫酸,用溶胶–凝胶法制备了固体超强酸
纳米光催化剂SO 2 -TiO ,并在此基础上用硝酸银进行了改性。用 XRD、IR、UV-vis 、BET 等手段对所制得的
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试样进行了表征,同时以甲基橙及苯酚的水溶液为模拟污染物,评价了样品的光催化性能,发现SO42--TiO2 的光
催化活性最高可达单一TiO2 的 10 倍,SO 2 /Ag-TiO2 的液相光催化活性超过P-25。
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关键词:SO 2 -TiO ;改性;固体超强酸;光催化活性
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中图分类号:O 643 文献标识码:A 文章编号:1000 –6613 (2006)04 –0411 –04
Preparation and modification by Ag of solid super-acid
nano- SO 2 -TiO2 photo-catalyst
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LIU Hong ,LIU Pan ,GU Kongliang ,LI Jing ,SUN Xuan
(School of Resources and Environment, Wuhan University of Science and Technology , Wuhan 430081)
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Abstract:Solid super-acid nano-SO -TiO powder photo-catalyst were prepared by the sol-gel method
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using Ti(OC H ) as raw material and adding 49% sulfuric acid into the original liquid. Then the
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SO /Ag-TiO photo-catalyst was modified by AgNO . The prepared samples were characterized with
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UV-vis, IR, XRD and BET measurements. The photo-catalytic reactivity of samples was evalua
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