半纤维素/TiO2复合凝胶的光催化降解性能

doi:10.11949/j.issn.0438-1157.20151542

化工学报 ›› 2016, Vol. 67 ›› Issue (5): 2070-2077.DOI: 10.11949/j.issn.0438-1157.20151542

半纤维素/TiO₂复合凝胶的光催化降解性能

孙晓锋, 李驰, 夏修阳, 周睿, 王亚雄, 冯阳

西北工业大学应用化学系, 陕西西安 710129

收稿日期:2015-10-12 修回日期:2016-02-24 出版日期:2016-05-05 发布日期:2016-05-05
通讯作者: 孙晓锋
基金资助:
国家自然科学基金项目(20707016);中央高校基本科研业务费专项资金(3102015BJ026);西北工业大学研究生创意创新种子基金(Z2015150)。

Photocatalytic degradation property of hemicellulose/TiO₂ composite gel

SUN Xiaofeng, LI Chi, XIA Xiuyang, ZHOU Rui, WANG Yaxiong, FENG Yang

Department of Applied Chemistry, Northwestern Polytechnical University, Xi'an 710129, Shaanxi, China

Received:2015-10-12 Revised:2016-02-24 Online:2016-05-05 Published:2016-05-05
Supported by:
supported by the National Natural Science Foundation of China (20707016), the Fundamental Research Funds for the Central Universities (3102015BJ026) and the Seed Foundation of Innovation and Creation for Graduate Students in Northwestern Polytechnical University (Z2015150).

摘要/Abstract

摘要：

以半纤维素和TiO₂纳米粒子为原料制得半纤维素/TiO₂复合凝胶。分别用红外光谱分析和扫描电镜对复合水凝胶进行了表征,分析表明半纤维素上成功接枝聚丙烯酸,凝胶呈现多孔结构,且随着TiO₂含量的增加凝胶孔径减小。考察了半纤维素/TiO₂复合凝胶的溶胀性能以及对亚甲基蓝的光催化降解性能,研究表明半纤维素/TiO₂复合凝胶的溶胀率随着TiO₂粒子含量的增加而减小,随着pH的增大先增大后减小;对亚甲基蓝染料的降解率随着TiO₂含量的增加先增大后减小,随着pH的增大先增大后减小,随着亚甲基蓝初始浓度的增大而增大。

关键词: 聚合物, 纳米粒子, 废水, 降解

Abstract:

Hemicellulose/TiO₂ composite gel was prepared using hemicellulose and TiO₂ nanoparticles. Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) were used to study the structure and morphology of the hydrogel. Experimental analysis showed that the hemicellulose was successfully grafted with the polyacrylic acid and a porous hydrogel was observed. The pore size of the hydrogel decreased with the increase of the TiO₂ content. In addition, the swelling properties and photocatalytic degradation properties of the hydrogel were also investigated. Experimental results showed that the swelling ratio of the hydrogel increased at first and then decreased with the increase of pH while kept decreasing with the increase of the TiO₂ content. The degradation ratio of methylene blue increased at first and then decreased with the increase of the TiO₂ content or a rise of pH value of the methylene blue solution, and it also increased with the increase of the initial concentration of methylene blue solution.

Key words: polymer, nanoparticles, waste water, degradation

中图分类号:

O648.17

孙晓锋, 李驰, 夏修阳, 周睿, 王亚雄, 冯阳. 半纤维素/TiO₂复合凝胶的光催化降解性能[J]. 化工学报, 2016, 67(5): 2070-2077.

SUN Xiaofeng, LI Chi, XIA Xiuyang, ZHOU Rui, WANG Yaxiong, FENG Yang. Photocatalytic degradation property of hemicellulose/TiO₂ composite gel[J]. CIESC Journal, 2016, 67(5): 2070-2077.

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半纤维素/TiO₂复合凝胶的光催化降解性能

Photocatalytic degradation property of hemicellulose/TiO₂ composite gel

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