1. Efficient adsorption of methylene blue in water by nitro-functionalized metal-organic skeleton‑calcium alginate composite aerogel.
- Author
-
Zhao S, Li Y, Wang M, Chen B, Zhang Y, Sun Y, Chen K, Du Q, Pi X, Wang Y, Jing Z, and Jin Y
- Subjects
- Adsorption, Nitrogen Dioxide, Metals, Radiopharmaceuticals, Skeleton, Methylene Blue, Water chemistry
- Abstract
This paper presents the first investigation of the adsorption performance of methylene blue by the nitro-functionalized metal-organic framework (MIL-88B-NO
2 ). MIL-88B-NO2 has a specific surface area of 836.0 m2 /g, which is 109.8 % higher than MIL-88B. The maximum adsorption capacity of methylene blue is 383.6 mg/g, which is 68.2 % higher than that of MIL-88B. This phenomenon can be attributed to the great increase in specific surface area and the introduction of nitro-functional groups. However, its microcrystalline nature makes it difficult to remove in practical applications and quickly causes secondary pollution. Therefore, the composite of MIL-88B-NO2 and calcium alginate (CA) to form aerogel maintains the inherent properties of the two materials and makes it easy to recycle. The utmost adsorption capability of MIL-88B-NO2 /CA-2 aerogel is 721.0 mg/g. Compared with MIL-88B-NO2 , the adsorption performance of MIL-88B-NO2 /CA-2 aerogel is further improved by 88.0 %. The higher adsorption capacity of the adsorbent may be due to the synergistic interplay of electrostatic attraction, π-π conjugation, hydrogen bonding, metal coordination effect, and physicochemical properties. Also, MIL-88B-NO2 /CA-2 aerogel has good recyclability, indicating that it has broad application prospects in the removal of positive dyes in contaminated water., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier B.V. All rights reserved.)- Published
- 2023
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