Abstract
In this study, an investigation of the adsorption efficiency of a novel Spirulina based TiO2@CTAB nanoparticle is carried out against one of the highly toxic heavy metal Cr (VI). The co-precipitation method was used to prepare the nanoparticles which were analyzed by various techniques including XRD, UV–Vis spectroscopy, Raman Spectroscopy, FT-IR, BET, FESEM with EDX, Zeta Potential, and Particle Size Analyzer. The pore diameter of the TiO2@CTAB nanocomposite was found to be 3.425 nm with a total surface area of 125.709 m2/g. The pHZPC and XPS studies were used to describe the mechanism of adsorption of Cr (VI) by TiO2@CTAB. For synthesized material, the Langmuir adsorption isotherm model exhibits improved adsorption than the Freundlich adsorption isotherm model, having a removal capacity of 127.551 mg/g. The adsorption of CR (VI) on the surface of TiO2@CTAB follows pseudo-second-order kinetics having an R2 value of 0.99983. Furthermore, the prepared mesoporous TiO2@CTAB adsorbent has high reusability without considerable degradation and may avoid the production of secondary pollutants to a large extent.
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