Abdollahi Yadollah, Zakaria Azmi, Abdullah Abdul Halim, Fard Masoumi Hamid Reza, Jahangirian Hossein, Shameli Kamyar, Rezayi Majid, Banerjee Santo, Abdollahi Tahereh
Material Synthesis and Characterization Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
Chem Cent J. 2012 Aug 21;6(1):88. doi: 10.1186/1752-153X-6-88.
The optimization processes of photo degradation are complicated and expensive when it is performed with traditional methods such as one variable at a time. In this research, the condition of ortho-cresol (o-cresol) photo degradation was optimized by using a semi empirical method. First of all, the experiments were designed with four effective factors including irradiation time, pH, photo catalyst's amount, o-cresol concentration and photo degradation % as response by response surface methodology (RSM). The RSM used central composite design (CCD) method consists of 30 runs to obtain the actual responses. The actual responses were fitted with the second order algebraic polynomial equation to select a model (suggested model). The suggested model was validated by a few numbers of excellent statistical evidences in analysis of variance (ANOVA). The used evidences include high F-value (143.12), very low P-value (<0.0001), non-significant lack of fit, the determination coefficient (R2 = 0.99) and the adequate precision (47.067). To visualize the optimum, the validated model simulated the condition of variables and response (photo degradation %) be using a few number of three dimensional plots (3D). To confirm the model, the optimums were performed in laboratory. The results of performed experiments were quite close to the predicted values. In conclusion, the study indicated that the model is successful to simulate the optimum condition of o-cresol photo degradation under visible-light irradiation by manganese doped ZnO nanoparticles.
当采用传统方法（如一次改变一个变量）进行光降解优化过程时，该过程复杂且成本高昂。在本研究中，采用半经验方法对邻甲酚（o-甲酚）的光降解条件进行了优化。首先，通过响应面法（RSM）设计了包含四个有效因素的实验，这四个因素分别为辐照时间、pH值、光催化剂用量、邻甲酚浓度，光降解率作为响应值。RSM采用中心复合设计（CCD）方法，由30次运行组成以获得实际响应值。将实际响应值与二阶代数多项式方程拟合以选择一个模型（建议模型）。通过方差分析（ANOVA）中的一些出色统计证据对建议模型进行了验证。所使用的证据包括高F值（143.12）、非常低的P值（<0.0001）、不显著的失拟、决定系数（R2 = 0.99）和足够的精度（47.067）。为了直观显示最佳条件，经过验证的模型通过使用一些三维图（3D）模拟变量和响应（光降解率）的条件。为了验证模型，在实验室中进行了最佳条件实验。实验结果与预测值非常接近。总之，该研究表明该模型成功地模拟了在可见光照射下，锰掺杂的ZnO纳米颗粒对邻甲酚光降解的最佳条件。
