Unique multifunctional coatings, comprising a 3D superhydrophobic agent and two nanostructured photocatalysts (solar-light sensitive 50/50 and 10/90 TiO₂-ZnO nano-heterostructures), compatible with the inorganic substrates of the Built Heritage, have been designed.

The synthesized nanoparticles showed an enhanced photocatalytic activity (tested by NO degradation) as compared with the raw TiO₂ and ZnO materials.

Dispersing agents were used to optimize the coatings, avoiding agglomeration of the photocatalytic nanoparticles and increasing the stability of the suspensions. Four distinct dispersions were optimized and applied as coatings onto stony materials used in the Built Heritage, such as sandstone, lime mortar, granite and limestone. Their effectiveness was assessed by assessing hydrophobicity of the surfaces (static water contact angle), photocatalytic activity and self-cleaning as well as water vapour permeability of the treated specimens. These transparent coatings demonstrated high compatibility with the construction materials of the Architectural Heritage and showed a synergistic effect rendering a minimized water absorption, self-cleaning ability evidenced by the reduced adsorption of soiling deposits and a reasonable degradation of any trace that might be adsorbed, as well as a protecting hydrophobic environment for the photocatalyst.

设计了独特的多功能涂料，该涂料包含3D超疏水剂和两种纳米结构的光催化剂（对光敏感的50/50和10/90 TiO ₂ -ZnO纳米异质结构），与建筑遗产的无机基材相容。

与原始的TiO ₂和ZnO材料相比，合成的纳米颗粒显示出增强的光催化活性（通过NO降解测试）。

分散剂用于优化涂层，避免了光催化纳米颗粒的团聚并提高了悬浮液的稳定性。对四种不同的分散体进行了优化，并将其作为涂料涂覆到建筑遗产中使用的石质材料上，例如砂岩，石灰砂浆，花岗岩和石灰石。通过评估表面的疏水性（静态水接触角），光催化活性和自清洁性以及处理过的样品的水蒸气透过率来评估其有效性。这些透明涂料显示出与建筑遗产建筑材料的高度相容性，并表现出协同作用，使吸水率降至最低，