Synthesis of Mesoporous/Macroporous Microparticles Using Three-Dimensional Assembly of Chitosan-Functionalized Halloysite Nanotubes and Their Performance in the Adsorptive Removal of Oil Droplets from Water
| Autor: | Asma Eskhan, Sameer Al-Asheh, Mohammad Abu Haija, Fawzi Banat |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Aqueous solution 02 engineering and technology Surfaces and Interfaces engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Halloysite Pickering emulsion 0104 chemical sciences Chitosan chemistry.chemical_compound Adsorption chemistry Chemical engineering Oil droplet Monolayer Electrochemistry engineering General Materials Science 0210 nano-technology Mesoporous material Spectroscopy |
| Zdroj: | Langmuir. 35:2343-2357 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/acs.langmuir.8b04167 |
| Popis: | Halloysite nanotubes (HNTs) were assembled into mesoporous/macroporous microparticles (c-g-HNTs MPs) using Pickering template-assisted approach. To unravel the stabilization mechanism in Pickering emulsion form, several emulsions and microparticles were prepared at various conditions and visualized using confocal laser scanning microscopy. The prepared c-g-HNTs MPs were used to treat emulsified oil solutions resulting in a maximum removal efficiency of 94.47%. The kinetics data of oil adsorption onto c-g-HNTs MPs was best fitted by the pseudo-second-order kinetic model (R2 = 0.9983). The maximum monolayer adsorption capacity of oil onto c-g-HNTs MPs as predicted by the multilayer Brunauer–Emmett–Teller model was found to be 788 mg/g. Compared with pristine HNTs, c-g-HNTs MPs exhibited higher self-settleability rates in aqueous solutions as well as in emulsified oil solutions, demonstrating their candidacy for practical water treatment applications. The c-g-HNTs MPs were repeatedly used for five adsorption... |
| Databáze: | OpenAIRE |
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