Visible light responsive superhydrophilic TiO2/reduced graphene oxide coating by vacuum-assisted filtration and transfer method for self-cleaning application

摘要

A novel nanohybrid coating of TiO2 and reduced graphene oxide is fabricated by vacuum assisted filtration followed by transfer to glass substrate. Here the concentration of reduced graphene oxide is optimised to tune the hydrophilicity of the coatings. The main advantage of this coating technique is that, the film thickness can be controlled by the amount of graphene oxide used for vacuum filtration. These TiO2/reduced graphene oxide films show hydrophilicity and photocatalytic property upon irradiation of UV light and visible light. At a particular loading of reduced graphene oxide, these hybrid films show superhydrophilicity (water contact angle < 5 degrees) by 10 min irradiation of visible light, suggest the scope to develop self-cleaning coatings for self-cleaning applications. Moreover the superhydrophilicity appear to be reversible, initial contact angle is retained after removing the light exposure.