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Abstract：
ZnO photocatalysts were synthesized via solvothermal method and a reduced experimental design (Box-Behnken) was applied to investigate the influence of four parameters (temperature, duration, composition of the reaction mixture) upon the photocatalytic activity and the crystal structure of ZnO. The four parameters were correlated with photocatalytic degradation of methyl orange and the ratio of two crystallographic facets ((002) and (100)) using a quadratic model. The quadratic model shows good fit for both responses. The optimization experimental results validated the models. The ratio of the crystal facets shows similar variation as the photocatalytic activity of the samples. The water content of the solvent is the primary factor, which predominantly influence both responses. An explanation was proposed for the effect of the parameters and how the ratio of (002) and (100) crystal facets is influenced and its relation to the photocatalytic activity. The present research laconically describes a case study for an original experimental work, in order to serve as guideline to deal with such complicated subjects as quantifying influence of synthesis parameters upon the catalytic activity of the obtained ZnO.
摘要：
通过溶剂热法合成了ZnO光催化剂，并采用简化的实验设计（Box-Behnken）研究了四个参数（温度，持续时间,反应混合物的组成）对ZnO的光催化活性和晶体结构的影响。使用二次模型将四个参数与甲基橙的光催化降解以及两个晶面（（002）和（100））的比率相关联。二次模型对两种响应都显示出良好的拟合。优化实验结果验证了模型的有效性。晶面的比率显示出与样品的光催化活性相似的变化。溶剂的含水量是首要因素,主要影响两种反应。对参数的影响以及如何影响（002）和（100）晶面的比例及其与光催化活性的关系提出了解释。本研究简洁地描述了一个原始实验工作的案例研究，以作为处理诸如定量合成参数对所得ZnO催化活性影响等复杂主题的指南。
