The development of promising nanomaterials for capacitive deionization (CDI) is an emerging energy-efficient technology for water recovery and purification. Herein, the nanoarchitecture of deposition of molybdenum disulfide nanosheets onto N-doped carbon sphere (MoS₂@NCS) has been successfully developed using hydrothermal processes for CDI applications. The morphological and fine structural analyses clearly indicate that the hexagonal structure of MoS₂ nanosheets are homogeneously dispersed onto the 300-nm NCS to form the flower-like MoS₂@NCS heterostructure. After calcination for 2 h at 800 °C, the MoS₂@NCS exhibits a large specific surface area of 82 m² g⁻¹ and interconnected meso-macroporous channels for rapid ion and electron transfer, resulting in the superior electrochemical behaviors with the specific capacitance of 340 F g⁻¹ at 5 A g⁻¹ in 1 M Na₂SO₄ solution. Moreover, the electrosorption performance of MoS₂@NCS-800 was investigated under different conditions in terms of initial NaCl concentration and voltage, and the superior specific electrosorption capacity of 59.9 mg g⁻¹ is obtained at 2000 mg L⁻¹ NaCl and applied voltage of 1.4 V. The experimental data is then well-fitted with the modified Donnan model, signifying that the electrosorption performance is highly dependent on the formation of electrical double layers and homogeneous potential distribution throughout the diffuse layer of the porous electrodes. The excellent cyclic durability of MoS₂@NCS electrode is also highlighted after 100 electrosorption-desorption cycles. These results elaborate that MoS₂@NCS composites are promising electrochemical materials for CDI application, which can open a pathway to design the 2D/3D hybrid nanoarchitectures as a highly potential material for green and sustainable water purification and ion removal in grey and salty waters.

开发用于电容去离子（CDI）的有前途的纳米材料是一种新兴的水回收和净化节能技术。在此，二硫化钼纳米片沉积到 N 掺杂碳球 (MoS ₂ @NCS) 上的纳米结构已经成功地使用水热工艺开发用于 CDI 应用。形态和精细结构分析清楚地表明，MoS ₂纳米片的六方结构均匀分散在300 nm NCS上，形成花状MoS ₂ @NCS异质结构。在 800 °C 下煅烧 2 h 后，MoS _{2 @NCS 表现出 82 m} ² g ^-1的大比表面积和互连的中大孔通道用于快速离子和电子转移，从而在1 M Na ₂ SO ₄溶液中产生优异的电化学行为，在 5 A g ^{-1下具有 340 F g -1的比电容。}此外，研究了MoS ₂ @NCS-800 在不同条件下初始NaCl浓度和电压的电吸附性能，在2000 mg L ^{-1时获得了59.9 mg g -1的优异比电吸附容量。}NaCl 和 1.4 V 的施加电压。然后，实验数据与改进的 Donnan 模型非常吻合，这表明电吸附性能高度依赖于双电层的形成和多孔电极扩散层中的均匀电位分布。_{在 100 次电吸附-解吸循环后，MoS 2} @NCS 电极的优异循环耐久性也得到了体现。这些结果表明，MoS ₂ @NCS 复合材料是用于 CDI 应用的有前途的电化学材料，它可以开辟一条设计 2D/3D 混合纳米结构的途径，作为在灰色和咸水中进行绿色和可持续的水净化和离子去除的高潜力材料。