Antiviral Properties of HAp/Titania Composite Coating Fabricated by Suspension and Solution Precursor Plasma Spray Technology

This study aims at investigating the antiviral properties of HAp/Titania composite coating. TiO₂ has promising photocatalytic activity and good efficiency in destroying the bacteria, and various viral species. SPPS is an emerging technology which can use solution to synthesis oxides. This study is focused to understand the basic mechanism of titanium complex and coating formation method in order to produce oxygen deficient type visible light sensitive coating. Coating surface was studied using XPS, UPS and REELS to understand the electronic structure and optical properties. XPS result indicated the crystallinity of HAp coating has increased as compared to conventional plasma sprayed coating and Ti³⁺ species & oxygen vacancy was formed on the surface of the titania coating which can act as a charge trap. Band gap, ionization energy and electron affinity of the coating were also evaluated to further support the photocatalytic performance of this coating. There was increment in optical absorption area on the coating surface from rutile & anatase form of TiO₂. Antiviral test will be carried out to reveal its virucidal effectiveness.