Molybdenum disulfide (MoS₂) nanoflowers synthesized by a hydrothermal route were successfully grafted on a melamine-formaldehyde sponge through a facile dip-coating method to form MoS₂ nanoflowers sponges. The MoS₂ sponges exhibited high-efficient adsorption performance to cationic dye, Rhodamine B (RhB), with a maximum adsorption capacity of 104.78 mg RhB g⁻¹ product (equal to 213.84 mg RhB g⁻¹ MoS₂ by conversion) within 60 min, which was primarily attributed to the strong electrostatic interactions between electronegative MoS₂ nanoflowers and positively charged RhB molecules. The equilibrium adsorption and kinetics data fitted well with the Sips isotherm model and the pseudo-second-order kinetic model, respectively. The recyclability experiments showed that the MoS₂ sponge adsorbent could be reused for 10 times with above 86.7% of the adsorption capacity retained. More remarkably, the as-prepared sponge adsorbent can be separated from the dye solution easily through a simple salvage instead of any tedious centrifugation or filtration processes. Thus, the separable MoS₂ sponge adsorbent with remarkable adsorption capacity and excellent reusability for organic dyes shows promise for large scale water remediation in the future.

中文翻译：

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一种简便的浸涂法制备可分离的MoS ₂海绵及其对若丹明B †的高效吸附性能

将水热法合成的二硫化钼（MoS ₂）纳米花成功地通过简便的浸涂法接枝在三聚氰胺-甲醛海绵上，形成了MoS ₂纳米花海绵。MoS ₂海绵在60分钟内对阳离子染料若丹明B（RhB）表现出高效的吸附性能，最大吸附容量为104.78 mg RhB g ^-1产物（换算为213.84 mg RhB g ^-1 MoS ₂）。 ，这主要归因于负电MoS ₂之间的强静电相互作用纳米花和带正电的RhB分子。平衡吸附和动力学数据分别与Sips等温线模型和拟二阶动力学模型很好地拟合。可回收性实验表明，MoS ₂海绵吸附剂可以重复使用10次，保留了86.7％的吸附能力。更显着的是，可以通过简单的补救方法而不是任何繁琐的离心或过滤过程，将制备的海绵吸附剂轻松地从染料溶液中分离出来。因此，具有优异的吸附能力和优异的有机染料可重复使用性的可分离的MoS ₂海绵吸附剂显示了未来大规模水修复的前景。