Hydrothermal synthesis of high surface area mesoporous silica as an efficient adsorbent for removal of crystal violet dye from aqueous solution

Authors

Inaam H. Ali, Department of Chemistry, College of Science for Women, University of Baghdad, Baghdad, Iraq.Follow
Ameera Hassan Hamed, Department of Chemistry, College of Science for Women, University of Baghdad, Baghdad, Iraq.Follow
Ennas Abdul Hussein, Department of Chemistry, College of Science for Women, University of Baghdad, Baghdad, Iraq.Follow
Saadiyah A. Dhahir, Department of Chemistry, College of Science for Women, University of Baghdad, Baghdad, Iraq.Follow

Abstract

In this work, a sample of mesoporous silica (MPS) with a high surface area was prepared by hydrothermal synthesis procedure. To investigate the properties of the prepared sample, it was characterized using different techniques like N₂ Adsorption-desorption, Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Atomic Force microscopy (AFM). In order to evaluate the efficiency of the prepared MPS, adsorption study was carried to examine the ability of MPS to remove crystal violet dye (CV) from aqueous solution. The study was done in different conditions of initial concentration (25-60 mg/L) of dye, dosage of MPS (0.01-0.05 g) and temperature range (293-323K). The results were applied to three adsorption isotherms which are, Langmuir, Freundlich and Temkin models and gave a very high match with Freundlich equation (R² = 0.9678). The kinetics of adsorption study was also applied using first order and second order kinetics model in addition to intra particle diffusion model. It reveals that removals of CV dye by MPS is a second order reaction and diffusion step is not the only limiting steps as the linear equation of intraparticle diffusion did not pass through origin. Thermodynamic investigation reveals spontaneous behavior and endothermic nature of adsorption process.

Keywords

Crystal Violet, High surface area, Hydrothermal, Mesoporous silica, Sodium silicate.

Subject Area

Chemistry

Article Type

Article

First Page

2550

Last Page

2561

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite this Article

Ali, Inaam H.; Hamed, Ameera Hassan; Hussein, Ennas Abdul; and Dhahir, Saadiyah A. (2025) "Hydrothermal synthesis of high surface area mesoporous silica as an efficient adsorbent for removal of crystal violet dye from aqueous solution," Baghdad Science Journal: Vol. 22: Iss. 8, Article 7.
DOI: https://doi.org/10.21123/2411-7986.5018