نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه پژوهشی پوششهای سطح و خوردگی، پژوهشگاه رنگ، تهران، ایران، صندوقپستی: 654- 16765
2 گروه پژوهشی مواد رنگزای آلی، پژوهشکده مواد رنگزا، پژوهشگاه رنگ، تهران، ایران، صندوقپستی: 654- 16765
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This study evaluated the simultaneous effects of deposition time, current density, alcohol type, and TiO₂ nanoparticle type on porous TiO₂ film formation and relative N719 dye loading using response surface methodology. Commercial P25 and P90 nanoparticles were electrophoretically deposited under constant-current conditions from methanol, ethanol, and isopropanol suspensions. A D-optimal design comprising 27 experiments was used, with deposited mass, film thickness, apparent film density, and absorbance of desorbed N719 as responses. Two-factor interaction models described deposited mass and thickness (R² = 0.9800 and 0.8914), whereas linear models fitted film density and N719 absorbance (R² = 0.8559 and 0.7379). Deposition time significantly affected all responses, while P90 showed higher N719 adsorption. The model-predicted optimum was 180 s, 2.77 mA cm⁻², ethanol, and P90, with a desirability of 0.75. Predicted responses were 0.299 mg deposited mass, 25 µm thickness, 0.024 g cm⁻³ density, and 0.110 N719 absorbance. SEM images of a representative P25 film revealed a porous structure containing microcracks.
کلیدواژهها [English]