1：Experimental Design and Method Selection:

The study involves preparing BC/TiO2 composite particles and PAE/BC/TiO2 composite coatings to evaluate photocatalytic and mechanical properties. Methods include nitrogen adsorption tests, SEM-EDS characterization, and analysis of degradation rates and mechanical tests.

2：Sample Selection and Data Sources:

Materials include PAE, BC, nano-TiO2 (P25), RhB, antifoaming agent, film-forming additive, dispersant, and distilled water. Samples are prepared with varying ratios of BC to TiO2 and amounts of BC/TiO2 in coatings.

3：List of Experimental Equipment and Materials:

Specific surface area analyzer (model 2390, Micromeritics Instruments Co., Ltd.), SEM-EDS equipment, UV light source (20W Xenon lamp), adhesion tester (QFD, Jingkelian Material Testing Machine Co., Ltd.), pencil hardness tester (QHQ, Miyu Ltd.), paint film impactor (QCJ-40, Jingkelian Material Testing Machine Co., Ltd.), oven, vacuum oven, ultrasonic disperser, stirrer, and sieves.

4：Experimental Procedures and Operational Workflow:

BC is pretreated by boiling, drying, and sieving. TiO2 is dispersed ultrasonically with dispersant, mixed with BC suspension, filtered, dried, and ground. Coatings are prepared by mixing PAE with additives, adding BC/TiO2, stirring, sieving, and curing. Tests include nitrogen adsorption, photocatalytic degradation of RhB under UV light, and mechanical property tests (adhesion, pencil hardness, impact resistance).

5：Data Analysis Methods:

BET method for specific surface area and pore size calculation, color change (ΔE) for degradation ratio (η), and standard methods for mechanical tests according to Chinese national standards.