Abstract
A method for titanium dioxide coating includes following steps. An electrolyte containing Ti3+ and at least one of NO3- and NO2-is provided for an electrodeposition device. A substrate is immersed into the electrolyte and electrically connected to the electrodeposition device. An electrode of the electrodeposition device is provided with cathodic current to the substrate for reduction of NO2- or NO3-. A titanium dioxide film is thus formed at the substrate surface. The present invention displays the advantages of thickness, porosity, and morphology control by varying the electroplating parameters, relatively uniform deposits on complex shapes, and low cost of instruments. An electrolyte for titanium dioxide coating is also herein disclosed.