Abstract Hierarchical porous hydrangea-like ZnWO4 microspheres were synthesized via a facile and simple ethylene glycol (EG) assisted-solvothermal route, in which EG acted as solvent and structure-directing agent. XRD, FTIR, Raman, SEM, TEM, DRS and N2 absorption-desorption have been used to obtain the purity and morphological information as well as BET surface area of the samples. SEM and TEM results demonstrated that the hierarchical porous hydrangea-like ZnWO4 microspheres consisted of many intercrossing curved nanoflakes. The hierarchical porous ZnWO4 microspheres exhibit a high specific surface area up to 92.03 m2/g. The morphological evolution results revealed that the reaction time was crucial to guide the self-assembled process from smaller building units (nanoflakes) to larger 3D flowerlike ZnWO4 hierarchical porous microspheres. Furthermore, this unique hierarchical porous material was effective in the decomposition of RhB in aqueous solution under UV light irradiation, which might be ascribed to the synergistic effect of hierarchical porous structures, large surface areas and good crystallinity of the products.

中文翻译：

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构建具有增强光催化性能的新型分层多孔类绣球 ZnWO4 微球

摘要 以乙二醇为溶剂和结构导向剂的乙二醇（EG）辅助溶剂热法合成了多级多孔状绣球花状ZnWO4微球。XRD、FTIR、拉曼、SEM、TEM、DRS 和 N2 吸收-解吸已用于获得样品的纯度和形态信息以及 BET 表面积。SEM 和 TEM 结果表明，分级多孔的绣球状 ZnWO4 微球由许多相互交叉的弯曲纳米薄片组成。分级多孔 ZnWO4 微球具有高达 92.03 m2/g 的高比表面积。形态演化结果表明，反应时间对于引导从较小的构建单元（纳米薄片）到较大的 3D 花状 ZnWO4 分级多孔微球的自组装过程至关重要。