Effect of void structure of photocatalyst paper on VOC decomposition

被引：52

作者：

Fukahori, Shuji ^{[1
]}

Iguchi, Yumi ^{[1
]}

Ichiura, Hideaki ^{[1
]}

Kitaoka, Takuya ^{[1
]}

Tanaka, Hiroo ^{[1
]}

Wariishi, Hiroyuki ^{[1
]}

机构：

[1] Kyushu Univ, Grad Sch Bioresource & Bioenvironm Sci, Dept Forest & Forest Prod Sci, Fukuoka 8128581, Japan

来源：

CHEMOSPHERE | 2007年 / 66卷 / 11期

关键词：

TiO2; photocatalysis; VOC; papermaking technique; paper structure;

D O I：

10.1016/j.chemosphere.2006.09.022

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

TiO2 powder-containing paper composites, called TiO2 paper, were prepared by a papermaking technique, and their photocatalytic efficiency was investigated. The TiO2 paper has a porous structure originating from the layered pulp fiber network, with TiO2 powders scattered on the fiber matrix. Under UV irradiation, the TiO2 paper decomposed gaseous acetaldehyde more effectively than powdery TiO2 and a pulp/TiO2 mixture not in paper form. Scanning electron microscopy and mercury intrusion analysis revealed that the TiO2 paper had characteristic unique voids ca. 10 mu m in diameter, which might have contributed to the improved photocatalytic performance. TiO2 paper composites having different void structures were prepared by using beaten pulp fibers with different degrees of freeness and/or ceramic fibers. The photodecomposition efficiency was affected by the void structure of the photocatalyst paper, and the initial degradation rate of acetaldchyde increased with an increase in the total pore volume of TiO2 paper. The paper voids presumably provided suitable conditions for TiO2 catalysis, resulting in higher photocatalytic performance by TiO2 paper than by TiO2 powder and a pulp/TiO2 mixture not in paper form. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：2136 / 2141

页数：6

共 25 条

[1] Enhancement effect of TiO2 immobilized on activated carbon filter for the photodegradation of pollutants at typical indoor air level [J].