溶胶凝胶微乳液法制备纳米TiO_2条件的响应面分析法

Response Surface Methodology Analysis of Nano-TiO_2 Preparation Using Sol-gel Microemulsion Synthesis

以溶胶凝胶微乳液法制备纳米级TiO2超细粉体,采用响应面法研究分析水和聚乙二醇对异辛基苯基醚(TX-100)物质的量比(A)、正己醇和TX-100物质的量比(B)、乙酰丙酮和四丁基钛酸酯(n-TBT)物质的量比(C)对制备的TiO2粒径的影响,并建立了粒径与操作条件的二阶关系,相关系数R2为0.971 5。研究结果表明:纳米TiO2粒径随A的增大而增大,随B和C的增大而减小,对纳米TiO2粒径的影响顺序:C>A>B,最佳制备条件是:A为5.54,B为7.41,C为0.44,模拟TiO2粒径为18.08 nm,试验值为19.04 nm,模拟值较好的符合试验值。

Nano-sized TiO2powders were prepared by micro-emulsion mediated sol-gel technique. Response surface methodology( RSM) was applied to evaluate the effects of water and Triton X-100 molar ratio( A),nhexanol and TX-100 molar ratio( B) and acetyl acetone and tetrabutyl titanate molar ratio( C) on the particle size. The relationship between particle size and preparation parameters accords with the second order polynomial equation and the coefficient is 0. 971 5. The particle size of the nano-TiO2increases with the rise of A but decreases with the rise of B and C. The effect order of experimental conditions on particle size of nanoTiO2is C > A > B. The optimized experimental condition is A of 5. 54,B of 7. 41 and C of 0. 44 with predict particle size of 18. 08 nm and experiment particle size of 19. 04 nm.