Chemometric study of thermal treatment effect on the P25 photoactivity for degradation of tartrazine yellow dye
| Autor: | Lucas S. Souza, Sandra A.R. Melo, Osvaldo Pezoti, André L. Cazetta, Karen C. Bedin, Marcela C. Silva, Isis P.A.F. Souza, Vitor C. Almeida |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Process Chemistry and Technology Composite number 02 engineering and technology Thermal treatment 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials YELLOW DYE chemistry.chemical_compound chemistry Materials Chemistry Ceramics and Composites Photocatalysis Degradation (geology) Response surface methodology 0210 nano-technology Photodegradation Tartrazine Nuclear chemistry |
| Zdroj: | Ceramics International. 44:12292-12300 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2018.04.016 |
| Popis: | In the present work, a chemometric study was carried out using a central composite rotatable design (CCRD) to evaluate the effect of thermal treatment on the P25 photoactivity for degradation of tartrazine dye. The factors investigated for thermal treatment were: temperature, heating rate and heating time, and the experimental design response was the photodegradation constant ( k app ). The response surface methodology (RSM) was employed to obtain the material with higher k app value for tartrazine photodegradation, under UV radiation, and investigate the interactions between factors of thermal treatment. The P25 used as precursor, as well as the obtained material from the optimized conditions (TTP op ), and the material with worst photocatalytic activity (TTP-17) were characterized from the N 2 physiosorption, FT-IR, SEM, XRD, DSC/TGA and PAS. The TTP op was obtained under conditions of temperature of 298 °C, heating rate of 10 °C min −1 and heating time of 177 min. TTP op showed k app value of 25.7, while P25 and TTP-17 presented k app values of 20.2 and 10.0, respectively. |
| Databáze: | OpenAIRE |
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