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聚乙二醇對TiO2-SiO2粒子的生成及光催化性能影響
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河北省教育廳資助項目（2005362）；河北師范大學基金項目（L2008K02）


Effects of PEG2000 Addition on the Formation and Photocatalytic Activity of TiO2-SiO2 Particles
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    摘要:

    以TiCl4為原料，采用自組裝技術(shù)制備TiO2-SiO2復(fù)合粒子，加入聚乙二醇2000（PEG 2000），探討聚乙二醇對TiO2-SiO2粒子生成及光催化降解甲基橙的影響。研究發(fā)現(xiàn)：隨組裝次數(shù)的增多，復(fù)合粒子表面TiO2 的含量增多；隨PEG2000的加入，TiO2顆粒間呈現(xiàn)一定的孔隙，使TiO2層粒子的表面積增加；樣品經(jīng)550 ℃煅燒，得到均為銳鈦礦與金紅石的混合相，且隨著PEG2000含量的增加，銳鈦礦的相對含量隨之增加；光催化實驗表明，PEG2000的摻雜使TiO2-SiO2的光催化性能得以提高。

    Abstract:

    TiO2-coated SiO2 (TiO2-SiO2) particles were prepared by a layer-by-layer assembly technique using TiCl4 as a precursor. Then PEG2000 was added in the particles. Effects of PEG2000 on the formation and photocatalytic activity of TiO2-SiO2 were studied. The results show that the amount of TiO2 on the surface of the particles was increased with more coating layers. With PEG addition to the precursor solution, many fine pores in the particles appeared among the TiO2 particles and the surface area of TiO2-SiO2 was increased. The mixed crystalline phases of anatase and rutile were synthesized by 550 oC calcination, and the relative content of anatase phase increased with increasing of PEG2000 amount. The catalytic activity of PEG2000-added TiO2-SiO2 was higher than that of TiO2-SiO2 without addition.

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陳汝芬,趙建榮,張 云,劉華亭.聚乙二醇對TiO2-SiO2粒子的生成及光催化性能影響[J].稀有金屬材料與工程,2010,39(11):2030~2034.[Chen Rufen, Zhao Jianrong, Zhang Yun, Liu Huating. Effects of PEG2000 Addition on the Formation and Photocatalytic Activity of TiO2-SiO2 Particles[J]. Rare Metal Materials and Engineering,2010,39(11):2030~2034.]
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  • 收稿日期:2010-07-07
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