Department of Chemistry, Renmin University of China, Beijing 100872, China.
Department of Chemistry, Renmin University of China, Beijing 100872, China.
J Colloid Interface Sci. 2021 Dec 15;604:635-642. doi: 10.1016/j.jcis.2021.07.046. Epub 2021 Jul 12.
Wastewater treatment is a severe environment issue, especially the discharge of excessive synthetic dyestuffs in the aquatic environment. In this study, a facile binary deep eutectic solvothermal process plus silica surface modification was successfully applied for preparation of porous nanosheet NiCO(OH)/SiO composites. The composites show powerful anionic dyes removal ability due to the high specific surface areas, hydrogen bond connection, coordination effect and strong electrostatic interactions with anionic dyes. A maximum adsorption capacity of 2637 mg g at neutral pH (ca.7) and 303 K was achieved for NiCO(OH)/SiO composite to adsorb Congo red, a representative anionic dye. Moreover, the composite has an excellent specificity for anionic dyes and could maintain above 95% removal efficiency after 5 cycles. Therefore, the as-prepared nanocomposites could be qualified as candidates for industrial environmental remedy. Furthermore, the proposed material preparation strategy could be extended to fabricate various advanced energy and environmental materials.
废水处理是一个严峻的环境问题，特别是在水生环境中排放过多的合成染料。在本研究中，成功应用了一种简便的二元深共晶溶剂热法加上硅烷表面改性来制备多孔纳米片 NiCO(OH)/SiO 复合材料。由于具有高比表面积、氢键连接、配位作用以及与阴离子染料的强静电相互作用，复合材料表现出强大的阴离子染料去除能力。在中性 pH（约 7）和 303 K 下，NiCO(OH)/SiO 复合材料对刚果红的最大吸附容量达到 2637 mg g，这是一种典型的阴离子染料。此外，该复合材料对阴离子染料具有优异的选择性，经过 5 次循环后仍能保持 95%以上的去除效率。因此，所制备的纳米复合材料可作为工业环境补救的候选材料。此外，所提出的材料制备策略可以扩展到制造各种先进的能源和环境材料。
