The photocatalytic degradation of simazine (SIM) was investigated using zinc oxide/graphene oxide (ZnO/GO) composite materials under visible light irradiation. The reaction kinetics was studied to optimize the reaction parameters for efficient degradation of SIM. Batch studies were performed to investigate the effects of initial reaction pH, the loading of the ZnO onto GO, and mass of catalyst on the removal of SIM from aqueous solution. A pH of 2 was determined to be the optimal reaction pH for the different ZnO-loaded GO catalysts. In addition, a mass of 40 mg of catalyst in the reaction was observed to be the most effective for the catalysts synthesized using 20 and 30 mmol of Zn²⁺ ions; whereas a mass of 10 mg was most effective for the ZnO/GO composite material synthesized using 10 mmol Zn²⁺ ions. The reaction was observed to follow a second-order kinetics for the degradation process. Furthermore, the synthesized ZnO/GO composite catalysts resulted in higher reaction rates than those observed for pure ZnO. The 30 mmol ZnO/GO composite expressed a rate of SIM degradation ten times greater than the rate observed for pure ZnO, and sixty-two times greater than the rate of photolysis. In addition, the catalyst cycling exhibited a constant photocatalytic activity for the ZnO/GO composite over three reaction cycles without the need of a conditioning cycle.

在可见光照射下，使用氧化锌/氧化石墨烯（ZnO / GO）复合材料研究了辛嗪（SIM）的光催化降解。研究了反应动力学以优化反应参数以有效降解SIM。进行了批量研究，以研究初始反应pH值，GO上ZnO的负载量以及催化剂质量对从水溶液中去除SIM的影响。确定2的pH为不同的ZnO负载GO催化剂的最佳反应pH。此外，对于使用20和30 mmol的Zn ²⁺离子合成的催化剂，观察到反应中40 mg的催化剂质量最有效。而使用10 mmol Zn ²⁺合成的ZnO / GO复合材料最有效的质量为10 mg离子。观察到该反应遵循降解过程的二级动力学。此外，合成的ZnO / GO复合催化剂比纯ZnO的反应速率更高。30 mmol ZnO / GO复合材料的SIM降解速率是纯ZnO的10倍，光解速率则是62倍。另外，催化剂循环在三个反应循环中对ZnO / GO复合物表现出恒定的光催化活性，而无需调节循环。