Preparation and characterization of hexadecanol-palmitic acid-lauric acid@(Ce-La-TiO₂) photocatalytic-heat-mositure composites

The hexadecanol (H)-palmitic acid (PA)-lauric acid (LA)@(Ce-La-TiO₂) photocatalytic-heat-mositure composites were prepared experimentally by the sol-gel method and the vacuum adsorption method, with the Ce-La-TiO₂ hollow microspheres as the carrier material and H-PA-LA as the phase change material separately. The light response property, heat property, mositure property, composition and microstructure were tested and characterized by UV-Vis, XRD, DSC, DVS and SEM, respectively. The results show that the H-PA-LA@(Ce-La-TiO₂) photocatalytic-heat-mositure composites present as uniform spheres, with small particle size and good dispersion, which promotes the coordinated effect of La ions and Ce ions. When the mass ratio of Ce(NO₃)₃·6H₂O to La(NO₃)₃·6H₂O is 1:1, the H-PA-LA@(Ce-La-TiO₂) photocatalytic-heat-mositure composites can obtain the optimal light response property. When the mass ratio of H-PA-LA to Ce-La-TiO₂ hollow microspheres is 1:2, H-PA-LA@(Ce-La-TiO₂) photocatalytic-heat-mositure composites show the best heat property. When the vacuum degree of vacuum drying oven is 0.07 MPa, the H-PA-LA@(Ce-La-TiO₂) photocatalytic-heat-mositure composites show the optimal moisture property.