MIL-88A grown in-situ on graphitic carbon nitride (g-C3N4) as a novel sorbent: Synthesis, characterization, and high-performance of tetracycline removal and mechanism
| Autor: | Jialing Song, Kong Zhuang, Lijun Meng, Tianwei Mu, Yanan Gao, Nan Jiang, Manhong Huang, Guo Jili, Shengyang Zheng |
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| Rok vydání: | 2020 |
| Předmět: |
Sorbent
Materials science Ion exchange General Chemical Engineering Graphitic carbon nitride 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Endothermic process Hydrothermal circulation 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Chemical engineering Mechanics of Materials Pickling 0210 nano-technology Porosity |
| Zdroj: | Advanced Powder Technology. 31:4344-4353 |
| ISSN: | 0921-8831 |
| Popis: | The extensive and accumulative use of tetracycline (TC) in the environment has become a serious problem. In this study, MIL-88A/g-C3N4 micro-nano particles were successfully prepared through a simple, low-cost, one-step hydrothermal method for TC adsorption in water. At a pH of 7.0, the maximum adsorption capacity (154.51 mg·g−1) of MIL-88A/g-C3N4 is reached at room temperature. Owing to its porous structure and large pore size (>2.06 nm) of MIL-88A/g-C3N4, TC can be adsorbed on both external and internal surfaces. Kinetic and thermodynamic studies have shown that the pseudo-second-order kinetic and the Langmuir-Freundlich model can be used to describe the adsorption process, which is a spontaneous endothermic process. The mechanism study reveals that the TC adsorption process by MIL-88A/g-C3N4 is mainly through electrostatic interaction and the ion exchange of COOH and NH2 groups on MIL-88A/g-C3N4 to TC. After simple pickling and water washing, MIL-88A/g-C3N4 can still reach 83.1% of the original adsorption capacity after five cycles, which proves that MIL-88A/g-C3N4 can be a promising adsorbent. |
| Databáze: | OpenAIRE |
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