Design of Photocatalytic Functional Coatings Based on the Immobilization of Metal Oxide Particles by the Combination of Electrospinning and Layer-by-Layer Deposition Techniques

This work reports the design and characterization of functional photocatalytic coatings based on combination two different deposition techniques. In a first step, poly(acrylic acid) + β-Cyclodextrin (denoted as PAA+ β-CD) electrospun fiber mat was deposited by using electrospinning technique followed thermal treatment in order to provide an enhancement resultant adhesion mechanical resistance. second layer-by-layer (LbL) assembly process performed immobilize metal oxide particles onto previously mat. this context, titanium dioxide (TiO2) used main element, acting cationic element multilayer LbL structure. addition, oxides, such tungsten (WO3) iron (Fe2O3), were added into PAA anionic polyelectrolyte solution with objective optimizing efficiency coating. All characterized scanning electron microscopy (SEM) atomic force (AFM) images, showing increase original diameter decrease roughness mats because step. The variation wettability properties from superhydrophilic surface less wettable function incorporation oxides also observed means water contact angle (WCA) measurements. With aim analyzing samples, degradation methyl blue (MB) azo-dye studied, almost complete discoloration dye irradiated area. study novel method techniques obtain functional, homogeneous efficient