Effects of coupling, calcination temperature and mole ratio were studied on the photocatalytic activity of CuO and NiO nanoparticles. Both semiconductors' nanoparticles were synthesized by sol-gel method. The coupled CuO-NiO system showed better photocatalytic activity than the mono-component NiO and CuO semiconductors. Hence, the coupled system with the best activity was characterized by the field emission scanning electron microscope (FESEM), EDX, X-ray Mapping, XRD, DRS, FT-IR and electrochemical impedance spectroscopy (EIS) techniques. The higher photocatalytic activity of the coupled system relates to its higher charge transfer ability that prevents from the electron/hole recombination. The NiO-CuO catalyst with mole ratio of 1:1 that calcined at 800 °C for 4 h, showed the best photocatalytic activity. The degradation of methylene blue (MB) was followed by UV–vis spectroscopy and the degradation extent was confirmed by chemical oxygen demand (COD) method. To investigate the interaction effects of the experimental variables on the photocatalytic activity of the coupled system, experimental design was applied based on the response surface methodology (RSM) approach. Among the interaction terms, effect of pH- time had the most importance (40%) on the created response. The best MB photodegradation result was obtained in a run included pH 3.5, catalyst dosage of 0.9 g L⁻¹, 3.2 mg L⁻¹ of MB during 26 min.

研究了偶联，煅烧温度和摩尔比对CuO和NiO纳米粒子光催化活性的影响。两种半导体的纳米粒子都是通过溶胶-凝胶法合成的。耦合的CuO-NiO系统显示出比单组分NiO和CuO半导体更好的光催化活性。因此，具有最佳活性的耦合系统通过场发射扫描电子显微镜（FESEM），EDX，X射线映射，XRD，DRS，FT-IR和电化学阻抗谱（EIS）技术进行了表征。偶联系统的较高的光催化活性与其防止电子/空穴复合的较高的电荷转移能力有关。在800°C下煅烧4 h的摩尔比为1：1的NiO-CuO催化剂表现出最好的光催化活性。用紫外-可见光谱法观察亚甲基蓝（MB）的降解，并通过化学需氧量（COD）方法确定降解程度。为了研究实验变量对偶联体系的光催化活性的相互作用影响，基于响应面方法（RSM）的方法进行了实验设计。在相互作用项中，pH时间对创建的响应具有最重要的意义（40％）。在包含pH 3.5，催化剂用量0.9 g L的运行中获得了最佳的MB光降解结果 基于响应面方法（RSM）的方法进行了实验设计。在相互作用项中，pH时间对创建的响应具有最重要的意义（40％）。在包含pH 3.5，催化剂用量0.9 g L的运行中获得了最佳的MB光降解结果 基于响应面方法（RSM）的方法进行了实验设计。在相互作用项中，pH时间对创建的响应具有最重要的意义（40％）。在包含pH 3.5，催化剂用量0.9 g L的运行中获得了最佳的MB光降解结果^-1，在26分钟内为3.2 mg L ^-1 MB。