关键词: 常规溶液反应法, 合成, 亚甲基蓝, Co-P催化剂, 催化, 降解

Abstract:

Photo-catalytic oxidation degradation of pollutants in printing and dyeing wastewater has wide application prospects and great practical significance. In this study, Co-P compounds with configuration limitation were designed and synthesized. They were prepared by conventional solution reaction method. Their activity was evaluated by investigating the degradation of methylene blue by the catalyst, using methylene blue to simulate the pollutants in high concentration printing and dyeing wastewater. The effects of metal ratio, catalyst dosage, catalytic time and catalytic temperature on the catalytic effect were investigated. The catalysts were characterized by XRD, FTIR and SEM. The experimental results show that Co²⁺ ion and organic phosphine ligand successfully. The precipitation in the main compounds containing Co-P compounds, also contains a small amount of organic phosphorus and other impurities. There are many porous structure in the Co-P crystals, which makes it with good absorption and photo-degradation of methylene blue. According to the experimental results, the optimum ratio of the catalyst raw material for synthesis is as follow: 1.4-(two phenyl phosphine) butane to cobalt chloride six hydrates is 2 to 1. The best catalytic conditions are: the best dosage of catalyst is 50mg, the illumination time is 3 hours, the best catalytic temperature is 50℃, under which the degradation ratio can reach to 15.45%. That is 4.6mg per liter. Calculated based on the dye concentration about 5mg/L in grade Ⅲ wastewater, the degradation rate is over 92%. It is expected to be widely used in the degradation of pollutants in printing and dyeing wastewater.

Key words: conventional solution reaction method, synthesis, methylene blue, Co-P catalyst, catalysis, degradation