NiOx激活PMS降解染料废水的研究（研究生论坛）

随着水处理行业的不断发展，对于传统的高级氧化技术（AOPs）也提出了更多新的要求，也开发了很多新的高性能催化剂用于高级氧化领域。为了探究NiOx在超声强化的条件下对单过硫酸盐（PMS）的催化性能，同时探究NiOx/PMS/US高级氧化体系对染料废水降解的优势，采用溶胶-凝胶法制备NiOx催化剂，酸性橙7（AO7）作为降解底物。探究发现：相比于NiOx/H2O2/US、NiOx/过硫酸盐（PDS）/US体系，NiOx/PMS/US体系具有更高的降解效率，且催化剂的煅烧温度、氧化剂]:氧化底物]、催化剂投量、超声功率都会对NiOx/PMS/US体系产生影响。结果表明：煅烧温度由200℃升至700℃后，AO7的降解率由95%降低至20%。氧化剂]:氧化底物]由20:1升至70:1，其降解率由77%提至95%，继续提高比例则会抑制降解。催化剂投量由120mg/L升至280mg/L，降解率提升不明显，在15分钟内都能达到95%的降解，但降解速率有所提升，继续提高催化剂投量其降解速率则没有明显的提高。超声功率由0W提至400W也会提高降解速率，但过高的超声功率对降解速率提高却不明显。此外，对催化剂复用以及对甲基橙（HIn）和活性艳蓝（KN-R）的降解证明NiOx/PMS/US体系具有一定的稳定性和普适性。NiOx的XRD图谱说明最佳煅烧温度下催化剂主要有NiO、Ni及无定型碳组成。NiOx是一种高效的催化剂，其良好的催化活性，稳定性和普适性，在高级氧化技术中可以发挥重要作用。当然其制备成本高和难以规模化生产成为了制约NiOx实现经济效益的主要因素，所以接下来的研究方向应为降低催化剂的制备成本并使其量产，最终让其进入应用领域。

Research on Activation of PMS by NiOx for the Degradation of Dye Wastewater

With the continuous development of the water treatment, many new request was put forward on the AOPs, more and more catalysts have been developed and used in the field of AOPs. In the experiment, catalytic performance of NiOx and the advantages of NiOx/PMS/US system on dye wastewater were investigated. NiOx catalyst was prepared by sol-gel method and the acid orange 7 (AO7) act as degradation substrate. The results indicated that compared to NiOx/H2O2/US and NiOx/PDS/US system, the effect of NiOx/PMS/US system was much better. The effect of calcination temperature, oxidants]: oxidation substrate], catalyst dosage, power of US were also investigated, and the results show that the degradation rate decreased while calcination temperature increased. In addition, the oxidants]: oxidation substrate] raised from 20:1 to 70:1, the degradation rate increased from 77% to 95%. However, while further increase of oxidants]: oxidation substrate] may suppress the degradation efficiency. With the catalyst dosage increase from 120mg/L to 280mg/L, the degradation speed increased, however, no obvious change in degradation rate occurred after further increases of catalyst dosage. Higher amount of US power can accelerate the reaction, however, it only showed a slight increase with further increases of US power from 400W to 500W. The reuse of the catalyst and degrade of methyl orange (HIn) and reactive brilliant blue (KN-R) proved the stability and universality of NiOx/PMS/US system. The XRD patterns of NiOx show that the catalyst at the best calcination temperature is mainly composed of NiO, Ni and amorphous carbon. Because of its excellent catalytic activity, stability and universality, NiOx can play an important role in AOPs, thus, NiOx is an efficient catalyst. Nowadays, the main factor which restricting the economic benefits of NiOx is the high cost of preparation and difficulty in mass production. Therefore the foremost research aim is to reduce the cost of preparation of the catalyst. When these defects are resolved, this catalyst will have a bright future in AOPs field.