聚丙烯酸固载纳米TiO2复合材料的制备及其光催化性能

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北京化工大学学报（自然科学版） ›› 2012, Vol. 39 ›› Issue (4) : 68-71.

材料科学与工程

张成龙;郑凯;孟祥福*

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Preparation of poly(acrylic acid) supported nano-scaled TiO2 and its photocatalytic activity

ZHANG ChengLong¹;ZHENG Kai¹;MENG XiangFu²

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摘要

采用改进的溶胶-凝胶法制备了水溶性TiO₂干凝胶，利用交联聚丙烯酸（PAA）强吸水性和三维网状结构特点，将TiO₂溶胶粒子固载到聚丙烯酸高分子链上，经过水热处理原位生长制备PAA/TiO₂纳米复合材料。通过拉曼光谱（Raman）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）等测试手段研究PAA/TiO₂纳米复合材料的结构特征，以甲基橙为模型污染物研究了PAA/TiO₂纳米复合材料的光催化性能。结果表明，纳米TiO2粒子被固载到PAA高分子链上，PAA吸水膨胀后扩展至整个反应空间，有效地增加了纳米TiO₂与有机污染物的接触面积，大大提高了光催化降解的效率。

Abstract

Poly(acrylic acid) (PAA)supported nanoscale Poly(acrylic acid) (PAA)supported nanoscale TiO₂ has been prepared using a soluble titania xerogel, which was synthesized via a modified solgel method. TiO₂ nanoparticles were immobilized on PAA macromolecular chains by in situ growth with a hydrothermal treatment. Raman spectroscopy, scanning electron microscopy and transmission electron microscopy were used to investigate the nanostructure of the PAA/TiO₂nanocomposites. The photocatalytic activity of PAA/TiO₂ nanocomposites was evaluated using photodegradation of methyl orange as a probe reaction. The results showed that TiO₂ supported on PAA had a high photoactivity. This may be because PAA chains immobilized TiO₂can expand thousands of times after absorbing water, leading to increase in the interfacial area between TiO₂and organic pollutants. Meanwhile, the asprepared PAA/TiO₂nanocomposites can be easily recovered from purified water with a low cost.

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张成龙¹;郑凯¹;孟祥福^2*

. 聚丙烯酸固载纳米TiO2复合材料的制备及其光催化性能[J]. 北京化工大学学报（自然科学版）, 2012, 39(4): 68-71

ZHANG ChengLong¹;ZHENG Kai¹;MENG XiangFu². Preparation of poly(acrylic acid) supported nano-scaled TiO2 and its photocatalytic activity[J]. Journal of Beijing University of Chemical Technology, 2012, 39(4): 68-71

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收稿日期	修回日期	出版日期
2012-03-07	1900-01-01	2012-07-20
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2012-07-20

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