Abstract：
The influence of three main parameters including irradiation time, weight fraction of photocatalysts including multi-walled carbon nanotubes and different amount of TiO2 (MCT#1 and MCT#2) and pH is investigated for the degradation rate of methyl orange (MO). Analysis of variance (ANOVA) and response surface methodology (RSM) have been applied to study the binary and ternary interactions of the main parameters on the degradation rate. The ANOVA results confirm that all of three studied factors have a considerable efficacy on degradation rate of MO at 5% level of probability. Meanwhile, the results show that the degradation rate is enhanced with increasing the weight fraction in range of 0.1 to 0.3%wt and irradiation time in a period of 5 to 35min.The lowest and highest degradation are observed at pH=7 and pH=3, respectively. The normality of residue distribution can be confirmed using graphical analysis. The RSM results reveal that the degradation rate dependency on irradiation time is higher than the weight fraction of photocatalysts.
摘要：
三个主要参数的影响包括辐照时间,研究了包括多壁碳纳米管和不同量的TiO2（MCT＃1和MCT＃2）在内的光催化剂的重量分数和pH值对甲基橙（MO）的降解率。方差分析（ANOVA）和响应面法（RSM）已用于研究主要参数对降解速率的二元和三元相互作用。ANOVA结果证实,所有三个研究的因素在5%的概率水平下对MO的降解速率具有相当大的功效。同时,结果表明，在0.1~0.3%wt的范围内增加重量分数，在5~35min的照射时间内，降解速率提高。在pH=7和pH=3时分别观察到最低和最高的降解。可以使用图形分析来确认残差分布的正态。RSM结果表明，降解速率对辐照时间的依赖性高于光催化剂的重量分数。
