Department of Chemistry, Rajiv Gandhi University, Rono Hills, Doimukh 791 112, Arunachal Pradesh, India.
King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia.
J Hazard Mater. 2019 Dec 15;380:120838. doi: 10.1016/j.jhazmat.2019.120838. Epub 2019 Jul 5.
Herein, we report for the first time, the synthesis of CuO-Nd(OH) nanocomposites via a co-precipitation method coupled with the hydrothermal aging process. Varying the pH of the reaction medium, the shape of the nanocomposites could be controlled which determines their surface areas. These CuO-Nd(OH) nanocomposites exhibit very high adsorption capacity with successful removal of ∼ 97% of brilliant blue G (BBG) from water in 180 min under ambient condition. The adsorption process primarily follows Lagergren pseudo-first-order kinetics. The Langmuir isotherm model fits well with a very high monolayer adsorption capacity of 394.1 mg g at 30 °C. The mechanistic study supports chemisorption-type adsorption between the dye molecule and the adsorbent. Regeneration of the spent adsorbent makes the whole process cyclic and eco-friendly.
在此，我们首次通过共沉淀法结合水热老化工艺合成了 CuO-Nd(OH) 纳米复合材料。通过改变反应介质的 pH 值，可以控制纳米复合材料的形状，从而决定其比表面积。这些 CuO-Nd(OH) 纳米复合材料表现出非常高的吸附能力，在环境条件下，在 180 分钟内成功去除水中约 97%的亮蓝 G（BBG）。吸附过程主要遵循 Lagergren 拟一级动力学。Langmuir 等温模型拟合度很好，在 30°C 时单层吸附容量高达 394.1mg/g。机理研究支持染料分子与吸附剂之间的化学吸附类型吸附。通过对用过的吸附剂进行再生，使整个过程具有循环性和环境友好性。
