A environment-friendly 3D inorganic heteropoly blue (HPB) Ba₂Na₂ [HPW^V₄W^VI₈O₄₀]·26H₂O was directly synthesized by hydrothermal method and characterized by means of ICP, IR, XPS, X-ray single crystal and X-ray powder diffraction. It was an efficient heterogeneous photo-Fenton-like catalyst to degrade anionic dye methyl orange under visible light irradiation. It removed cationic dyes methylene blue in neutral environment and rhodamine B in acidic condition via flocculation. The removal efficiency of methylene blue and rhodamine B by flocculation was more than 95%. Moreover, it could degrade methyl orange and flocculate rhodamine B at the same time. For MO and MO-RhB solutions, the degradation rates of MO in 60 min were 85.5% and 49.1%, respectively. Furthermore, the possible pathways for the production of active species in the MO degradation reaction were discussed. This is the first HPB constructed with 4e-reduced phosphotungstate, Ba and Na ions, having the properties of photo-Fenton-like catalyst and flocculant.

环保型3D无机杂多蓝（HPB）Ba ₂ Na ₂ [HPW ^V ₄ W ^VI ₈ O ₄₀ ]·26H ₂O通过水热法直接合成，并通过ICP，IR，XPS，X射线单晶和X射线粉末衍射进行表征。它是一种有效的非均相光芬顿类催化剂，可在可见光照射下降解阴离子染料甲基橙。它通过絮凝去除了中性环境中的阳离子染料亚甲蓝和酸性条件下的若丹明B。絮凝对亚甲基蓝和若丹明B的去除率大于95％。而且，它可以降解甲基橙并同时絮凝若丹明B。对于MO和MO-RhB溶液，在60分钟内MO的降解率分别为85.5％和49.1％。此外，讨论了在MO降解反应中生产活性物质的可能途径。这是第一个用4e还原磷钨酸盐建造的HPB，