TiO_2 Supported on Porous Aluminosilicate Prepared in Cationic Surfactant Solution for Acetaldehyde Decomposition with a Protection of Organic Base Materials

摘要

In our previous study, we observed that TiO_2 supported on aluminosilicate prepared in a cationic surfactant solution were able to prevent the decomposition of base materials such as paper and resin by photocatalysis without drastically decreasing the photocatalytic decomposition behavior of a hazardous volatile organic compound, that is, formaldehyde. In this study, the effects of cationic surfactant addition on the decomposition of acetaldehyde and protection of a base acrylic resin were evaluated. The decomposition effect did not change between 0 and 2.5 wt% of the additive content but drastically reduced at 25 wt% addition. The excess adsorption of the cationic surfactant on aluminosilicate inhibited the initial adsorption of acetaldehyde on aluminosilicate, which led to the reduction of the decomposition behavior of acetaldehyde. In terms of the protection function, the 2.5 wt% addition prevented the weight loss of the resin better than 0 and 25 vvt% additions. The effect of the surface interaction between TiO_2 and aluminosilicate on the protection effect was determined by using a colloid probe atomic force microscope method. The protection effect became effective when a decrease in the adhesive force and a weak repulsive force were observed between TiO_2 nanoparticles and aluminosilicate during the preparation of TiO_2 supported on aluminosilicate.