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- Title
Selective adsorption of cationic azo dyes onto zeolite nanorod-based membranes prepared via laser ablation.
- Authors
Ismail, A. M.; Menazea, A. A.; Ali, Heba
- Abstract
The present study reveals the laser ablation synthesis of zeolite nanorod-based membranes for the first time as an efficient and selective adsorbent material toward cationic azo dyes. Zeolitenanrods were prepared by laser after that incorporated into Poly(vinylidene fluoride) (PVDF) matrix with different amounts (2, 5, 10, and 20 wt.%) by a simple and cost-effective process. The samples were characterized using XRD, HRTEM, ATR-FTIR, and FESEM. The loading of nanozeolite was presented by XRD and ATR-FTIR confirming the interaction between PVDF and nanozeolite. HRTEM revealed that the prepared nanozeolite has a rod shape with a diameter of 8–20 nm. The adsorption efficiency of the synthesized nanocomposite membranes was evaluated by monitoring the removal of three model dyes, namely, methylene blue (MB), crystal violet (CV), and methyl orange (MO). The results proved that the nanozeolite/PVDF membranes have high adsorption affinity toward cationic dyes and almost zero affinity toward anionic dyes. Additionally, the incorporation of nanozeolite has a pronounced effect on the adsorption performance of the PVDF membrane. The decolorization for MB using the composite membrane was 96.1%, whereas for pure PVDF membrane was only 30.3%. Moreover, the CV removal percentage increased from 40% to 95.2% after sensitization with nanozeolite. Finally, the impact of changing nanozeolite content in the modified membrane, contact time, initial dye concentration, and adsorbent dose on the adsorption performance of the modified membranes was studied.
- Subjects
GENTIAN violet; BASIC dyes; AZO dyes; LASER ablation; ZEOLITES; ADSORPTION (Chemistry); DIFLUOROETHYLENE
- Publication
Journal of Materials Science: Materials in Electronics, 2021, Vol 32, Issue 14, p19352
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-021-06453-w