State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China.
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China.
J Hazard Mater. 2021 Feb 5;403:123559. doi: 10.1016/j.jhazmat.2020.123559. Epub 2020 Aug 2.
Excessive synthetic dyestuffs in the aquatic environment pose various ecological and health issues that are detrimental to sustainable development. Adsorption is considered a feasible technique of eliminating dye pollutants from the water environment because of its advantages of high efficiency, low cost, easy operation, and absence of secondary pollution. Among the many dyes, Congo red (CR) is a widely used azo dye. Nickel-based materials, including nickel hydroxide, nickel oxide, nickel-containing layered double hydroxides, nickel-based spinel and metal-organic frameworks, metallic nickel, nickel-based sulfide, and nickel composites, have been extensively studied for CR adsorption due to their morphological diversity, large specific surface area, and strong affinity toward CR. However, fabricating nickel-based adsorbents with high efficiency and stability and excellent recyclability for practical application remains a challenge. This review outlines the research progress of nickel-based materials in CR adsorption. The interaction between CR molecules and nickel-based adsorbents is systematically presented, and the possible adsorption mechanisms are summarized. Finally, the challenges and future development directions of the practical application of nickel-based adsorbent materials are proposed.
水体中过量的合成染料会造成各种生态和健康问题，不利于可持续发展。由于吸附具有高效、低成本、易操作和无二次污染等优点，被认为是一种从水环境中去除染料污染物的可行技术。在众多染料中，刚果红（CR）是一种广泛使用的偶氮染料。镍基材料，包括氢氧化镍、氧化镍、含镍层状双氢氧化物、镍基尖晶石和金属有机骨架、金属镍、镍基硫化物和镍复合材料，由于其形态多样性、大比表面积和对 CR 的强亲和力，已被广泛研究用于 CR 吸附。然而，制备具有高效率和稳定性以及优异可回收性的实用镍基吸附剂仍然是一个挑战。本综述概述了镍基材料在 CR 吸附方面的研究进展。系统地介绍了 CR 分子与镍基吸附剂之间的相互作用，并总结了可能的吸附机制。最后，提出了镍基吸附剂材料实际应用的挑战和未来发展方向。
