Anatase TiO2 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.