Ag-ligand modified tungstovandates and their efficient catalysis degradation properties for methylene blue

作者：Zheng, Ran; Zhang, Huixia; Liu, Yunping; Wang, Xiaoxiao; Han, Zhangang^*

来源：Journal of Solid State Chemistry, 2017, 246: 258-263.

DOI：10.1016/j.jssc.2016.11.037

• Polyoxometalate
• Hybrid
• Silver
• Catalysis degradation
• Methylene blue

Two polytungstovandates [Ag(mbpy)(2)][Ag-2(mbpy)(3)][VW5O19]center dot H2O (1) and [Ag(mbpy)](2)[Ag(mbpy)(2)](4)[VW12O40] (2) (mbpy =4,4'-dimethyl-2,2'-bipyridyl), had been hydrothermally synthesized and characterized by IR, TG, and single-crystal X-ray diffraction techniques. Single-crystal structural analysis revealed that the polyanionic clusters in two compounds are different: Lindqvist-type in 1 and alpha-Keggin-type in 2, respectively, while the cationic moieties in them are Ag-mbpy units. The experiments showed that this kind of hybrid crystal materials possesses more efficiently catalytic performance for the degradation of organic dye methylene blue (MB) in water solution under the UV irradiation. The significant degradation rate of MB can reach 89.9%, 94.9% by crystals 1 and 2 (40 mg) in the course of about 5 min.

• 出版日期2017-2
• 单位河北师范大学