z-logo
Premium
Synthesis and Characterization of Novel Thin Films Using Spin and Dip Coating Techniques: Applications to the Adsorption of 4‐Nitrophenol and Methyl Orange in Single and Mixed Systems
Author(s) -
Chahih Amina Amel,
Zermane Faiza,
Cheknane Benamar,
Keffous Aissa,
Bouras Omar
Publication year - 2025
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202501422
Abstract The objective of the study was to synthesize new adsorbent materials in uniform films, based on two synthetic iron (oxy)hydroxides with polyvinyl chloride. A sol–gel process was employed using two deposition techniques: spin coating and dip coating. These films were characterized using a combination of analytical techniques to confirm the successful incorporation and homogeneous distribution of iron (oxy)hydroxides within the PVC matrix. X‐ray fluorescence analysis revealed a significant reduction in Fe 2 O 3 content from ∼98.2% in pure goethite and ∼97.7% in HFO to 54.2% and 47.6%, respectively, in their composite films. Textural analysis showed reductions in specific surface areas from 151.3 to 14.76 m 2 g⁻¹ for (HFO/PVC) composites and from 135.3 to 13.11 m 2 g⁻¹ for (goethite/PVC) matrices. Adsorption studies of 4‐nitrophenol and methyl orange were performed in batch mode, both in single‐component systems and binary mixtures. Kinetic studies showed that the pseudo‐first‐order model provided the best fit ( R 2 ≥ 0.92). Adsorption isotherms revealed that the Freundlich model best described single‐component systems, indicating heterogeneous surface adsorption. In binary systems, three adsorption weight ratios (r = (4‐nitrophenol/ methyl orange) = 1/3, 1 and 3 w/w) showed that the Sheindorf–Rebhun–Sheintuch (SRS) model, accurately described simultaneous adsorption, suggesting a cooperative adsorption mechanism.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here
Accelerating Research

Address

John Eccles House
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom