Application of nano-titanium dioxide in the manufacture of Photocatalyst Securities Paper by controlled hydrolysis method

Securities such as banknotes are permanently in contact with the human body according to their type of use and they are handed out daily among different people. This method of application makes these papers extremely contaminated and increases the possibility of transmission of pathogens by them. Therefore, the creation of self-cleaning properties in these types of papers is necessary. Titanium dioxide is one of the most widely used materials in papermaking that nowadays, its nanometer dimensions are considered as a photocatalyst. In this study, direct attachment of titanium dioxide nanoparticles to cellulosic fibers by controlled hydrolysis TiCl4 with urea in the presence of cellulose fibers was used which the homogenization of the suspension was done by ultrasonic waves. The cellulose fibers used were linter cotton fiber. The results of antibacterial and photocatalytic tests showed a very good performance against gram-positive and gram-positive bacteria and methylene blue degradation, respectively, but the results of mechanical and optical tests of the papers were undesirable and limit the use of these particles without applying any modifying method.