Effect of void structure of photocatalyst paper on VOC decomposition
Effect of void structure of photocatalyst paper on VOC decomposition
复制标题
DOI：
10.1016/j.chemosphere.2006.09.022
复制
发表时间：
2007-02-01
期刊：
影响因子：
8.8
通讯作者：
Wariishi, Hiroyuki
中科院分区：
文献类型：
--
作者：
Fukahori, Shuji;Iguchi, Yumi;Wariishi, Hiroyuki
采用造纸法制备了含TiO 2粉体的纸基复合材料，并对其光催化性能进行了研究。TiO 2纸具有源自层状纸浆纤维网络的多孔结构，TiO 2粉末分散在纤维基质上。在紫外线照射下，二氧化钛纸更有效地分解气态乙醛比粉末状二氧化钛和纸浆/二氧化钛的混合物不纸的形式。扫描电子显微镜和压汞分析表明，二氧化钛纸具有独特的特征空隙约。10 μ m的直径，这可能有助于提高光催化性能。采用不同游离度的打浆纸浆纤维和陶瓷纤维制备了具有不同孔隙结构的TiO 2纸基复合材料。光催化纸的孔隙结构影响其光分解效率，乙醛的初始降解率随着TiO 2纸总孔容的增加而增加。纸空隙大概提供了合适的条件，二氧化钛催化，导致更高的光催化性能的二氧化钛纸比二氧化钛粉末和纸浆/二氧化钛混合物不纸的形式。(c)2006爱思唯尔有限公司保留所有权利。
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.