Anatase TiO(2) adsorption on 3-aminopropyltrimethoxysilane-modified Al or glass surfaces

Herein, anatase titanium dioxide (TiO(2)) nanoparticles were prepared by boiling anatase TiO(2) in water without using hydrothermal synthesis. This changed the particle diameter because boiling caused particle collision via convection. Substrates were then prepared by assembling anatase nanoparticles on 3-aminopropyltrimethoxysilane (APTMS)-functionalized Al surfaces. The effect of pH on the preparation of anatase nanoparticles was investigated, with results indicating that pH 3 is optimal for anatase adsorption on Al surfaces. The anatase TiO(2) suspension was thus adjusted to pH 3 using dilute HCl solution, and the Al surface selectively adsorbed anatase nanoparticles. This method enabled the adsorption of anatase TiO(2) nanoparticles at room temperature, without using a heat source. In addition to Al substrates, this method was also found to be applicable to glass surfaces.