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采用微波照射法成功制备新型氧化锆、氧化镍和氧化锌负载活性炭纳米颗粒。采用XRD、HR-SEM和BET对合成纳米颗粒进行表征。利用UV-Vis漫反射光谱法研究Zr-AC、Ni-AC和Zn-AC复合材料的光学性能。验证了紫外光照射下印染废水的光催化效率。每隔一定时间观察印染废水的化学需氧量,以计算化学需氧量的去除率。结果表明,Zn-AC复合材料具有明显的光催化性,这归因于紫外光区域吸光度的增大、染料分子的有效吸附能力、辅助电荷转移和电子-空穴对抑制重组。利用Zn-AC复合材料降解印染废水可以得到最大的降解率(82%化学需氧量去除率)。在Zn-AC复合材料表面设计一个可能实现的协同机制。Zn-AC复合材料重复使用5次后,其催化活性无明显降低。
A new type of zirconia, nickel oxide and zinc oxide supported activated carbon nanoparticles were successfully prepared by microwave irradiation. The synthesized nanoparticles were characterized by XRD, HR-SEM and BET. Optical Properties of Zr-AC, Ni-AC and Zn-AC Composites by UV-Vis Diffuse Reflectance Spectroscopy. The photocatalytic efficiency of printing and dyeing wastewater was verified under UV light irradiation. Observe the chemical oxygen demand of printing and dyeing wastewater at regular intervals to calculate the removal rate of chemical oxygen demand. The results show that Zn-AC composite has obvious photocatalytic activity, which is attributed to the increase of absorbance in ultraviolet region, effective adsorption of dye molecules, assisted charge transfer and electron-hole recombination inhibition. Zn-AC composites degradation of printing and dyeing wastewater can be the largest degradation rate (82% COD removal rate). Design a possible synergistic mechanism on the surface of Zn-AC composites. Zn-AC composite material after repeated use of 5 times, its catalytic activity was not significantly reduced.