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Vol. 49 (2013), Issue 6, p. 6-11
Improving Dimensional Stability of Ag-doped TiO2 Nanoparticles Through Experimental Design
Abstract
УДК 666.3
The efficiency and competitiveness of using nanomaterials can be increased through introducing scientific experimental designs. For obtaining experimental models which can better approximate the real technological systems, a sufficient number of control factors and of necessary experiment units should be taken into account, having in view their economical aspect, too. Considering the importance of Ag-doped TiO2 nanoparticles in such domains as industry, environmental protection, health, etc., it is important for manufacturers to obtain nanoparticles of equal dimensions. The present paper is analyzing the ways of improving dimensional stability of Ag-doped TiO2 nanoparticles produced by the microwave-hydrothermal (M-H) method. In one case, a two-level L8 Taguchi design was used in 8 experiments, with seven control factors. In the other case, the Draper-Lin design of 40 experiments for 7 factors at two levels was utilized. It has been found out that the L8 Taguchi experimental design offers the same results as the Draper-Lin experimental design, but with much fewer experiments.
Keywords: TiO2, Ag, doping, experimental design, Taguchi, draper-lin
Приведены результаты оптимизации параметров синтеза гидротермальным методом в СВЧ поле легированных Ag наночастиц TiO2. Для оптимизации процесса использовались метод Тагучи (матрица L8) (Taguchi L8) и план второго порядка Дрейпера-Лина (Draper-Lin small composite design). Определены технологические факторы процесса синтеза, как то концентрация примеси, продолжительность и темпе-ратура процесса, подводимая СВЧ мощность, состав и рН раствора, степень заполнения автоклава, влия-ющие на стабильность размеров легированных Ag наночастиц TiO2. Показано, что оба использованных метода оптимизации приводит к подобным результатам.
Ключевые слова: TiO2, Ag, легирование, оптимизация параметров синтеза, Тагучи, Дрейпера-Лина.
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