Chemometric study of thermal treatment effect on the P25 photoactivity for degradation of tartrazine yellow dye
Chemometric study of thermal treatment effect on the P25 photoactivity for degradation of tartrazine yellow dye
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DOI：
10.1016/j.ceramint.2018.04.016
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发表时间：
2018-08-01
影响因子：
5.2
通讯作者：
Almeida, Vitor C.
中科院分区：
文献类型：
--
作者：
Souza, Isis P. A. F.;Pezoti, Osvaldo;Almeida, Vitor C.
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 (TTPop), 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 TTPop was obtained under conditions of temperature of 298 degrees C, heating rate of 10 degrees C min(-1) and heating time of 177 min. TTPop showed k(app) value of 25.7, while P25 and TTP-17 presented k(app) values of 20.2 and 10.0, respectively.
