We demonstrated a novel facile one-pot surfactant-free strategy for synthesis of the hierarchical dahlia-like TiO2/V2O5 composite. Both amorphous TiO2 and V2O5 can uniformly mix to form a hierarchical dahlia-like nanostructure. The adsorption process of TiO2/V2O5 composite toward methylene blue (MB) is considerably fitted by PFO kinetic model. The fitted maximum equilibrium adsorption capacity of MB is circa 501.28 mg/g by Langmuir isotherm model. The mechanisms of MB adsorption on TiO2/V2O5 composite could be composed by physical and electrostatic interaction. The considerable recyclability of TiO2/V2O5 composite after five cycle regeneration rounds suggests that the TiO2/V2O5 composite could be a potential adsorption candidate for MB removal in wastewater.

中文翻译：

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一种具有增强亚甲蓝吸附能力的分层大丽花状TiO2/V2O5复合材料的简便的一锅法无表面活性剂合成

我们展示了一种新的简便的无表面活性剂的单锅策略，用于合成分层的大丽花状 TiO2/V2O5 复合材料。无定形 TiO2 和 V2O5 都可以均匀混合形成分层的大丽花状纳米结构。TiO2/V2O5 复合材料对亚甲蓝 (MB) 的吸附过程与 PFO 动力学模型相当吻合。根据 Langmuir 等温线模型，MB 的拟合最大平衡吸附容量约为 501.28 mg/g。MB在TiO2/V2O5复合材料上的吸附机制可以由物理和静电相互作用组成。经过五轮循环再生后，TiO2/V2O5 复合材料具有相当大的可回收性，这表明 TiO2/V2O5 复合材料可能是去除废水中 MB 的潜在吸附候选物。