Affiliation:
1. a Department of Chemistry, School of Physical Sciences, Federal University of Technology Owerri, P.M.B. 1526 Owerri, Nigeria
2. b Africa Centre of Excellence in Future Energies and Electrochemical Systems (ACE-FUELS), Federal University of Technology Owerri, P.M.B. 1526 Owerri, Imo State, Nigeria
Abstract
Abstract
Using periwinkle shell ash (PSA) and polystyrene (PS), a new-fangled PSA@PS-TiO2 photocatalyst was fabricated. The morphological images of all the samples studied using a high-resolution transmission electron microscope (HR-TEM) showed a size distribution of 50–200 nm for all samples. The SEM-EDX showed that the membrane substrate of PS was well dispersed, confirming the presence of anatase/rutile phases of TiO2, and Ti and O2 were the major composites. Given the very rough surface morphology (atomic force microscopy (AFM)) due to PSA, the main crystal phases (XRD) of TiO2 (rutile and anatase), low bandgap (UVDRS), and beneficial functional groups (FTIR-ATR), the 2.5 wt.% of PSA@PS-TiO2 exhibited better photocatalytic efficiency for methyl orange degradation. The photocatalyst, pH, and initial concentration were investigated and the PSA@PS-TiO2 was reused for five cycles with the same efficiency. Regression modeling predicted 98% efficiency and computational modeling showed a nucleophilic initial attack initiated by a nitro group. Therefore, PSA@PS-TiO2 nanocomposite is an industrially promising photocatalyst for treating azo dyes, particularly, methyl orange from an aqueous solution.
Subject
Water Science and Technology,Environmental Engineering
Reference75 articles.
1. Water Treatment and Desalination
2. Thermal and electrical characterization of composite metal oxides particles from periwinkle shell for dielectric application
3. Effect on different TiO2 photocatalyst supports on photodecolorization of synthetic dyes: a review
4. Photocatalytic decolourization of industrial wastewater from a soft drink company;Aisien;Journal of Engineering and Applied Science,2013
5. Application of periwinkle shell ash as photocatalyst in the heterogeneous photocatalytic degradation of aniline in aqueous solution;Aisien;Journal of Materials and Environmental Science,2014