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采用分步酸化加热回流方法合成了磷钼钒杂多酸H7[P2Mo17VO62]?39H2O,用红外光谱表征了其结构,考察了其对罗丹明B光降解的催化作用.结果表明,没有杂多酸H7[P2Mo17VO62]·39H2O催化时,单独进行紫外光照射罗丹明B降解率仅17.5%;H7[P2Mo17VO62]?39H2O催化剂浓度增加,罗丹明B的降解率升高,最高达75%.同时探讨了Dawson型杂多酸H7[P2Mo17VO62]?39H2O对有机污染物的光催化降解机理.
The phosphomolybdovanadophosphoric acid H7 [P2Mo17VO62] 39H2O was synthesized by the step-by-step acidification and refluxing method. The structure of the phosphomolybdic acid was characterized by FTIR and the catalytic effect on the photodegradation of rhodamine B was investigated. The results showed that no heteropolyacid When H7 [P2Mo17VO62] · 39H2O was catalyzed, the degradation rate of rhodamine B was only 17.5% under ultraviolet light irradiation alone, and the degradation rate of rhodamine B increased up to 75% at the same concentration of H7 [P2Mo17VO62] Mechanism of Photocatalytic Degradation of Organic Pollutants by Dawson - type Heteropolyacid H7 [P2Mo17VO62]? 39H2O.