Solar-Induced Photocatalytic Degradation of Reactive Red and Turquoise Dyes Using a Titanium Oxide/Xanthan Gum Composite

Abeer I. Alwared, Noor A. Mohammed, Tariq J. Al-Musawi () and Ahmed A. Mohammed
Additional contact information
Abeer I. Alwared: Department of Environmental Engineering, College of Engineering, University of Baghdad, Baghdad 10071, Iraq
Noor A. Mohammed: Department of Environmental Engineering, College of Engineering, University of Baghdad, Baghdad 10071, Iraq
Tariq J. Al-Musawi: Building and Construction Techniques Engineering Department, Al-Mustaqbal University, Hillah 51001, Iraq
Ahmed A. Mohammed: Department of Environmental Engineering, College of Engineering, University of Baghdad, Baghdad 10071, Iraq

Sustainability, 2023, vol. 15, issue 14, 1-20

Abstract: The present study explores the solar-induced photocatalytic degradation of reactive red (RR) and reactive turquoise (RT) dyes in a single system using TiO 2 immobilized in xanthan gum (TiO 2 /XG), synthesized using the sol–gel dip-coating technique for direct precipitation. SEM-EDX, XRD, FTIR, and UV–Vis were used to assess the characteristics of the resulting catalyst. Moreover, the effects of different operating parameters, specifically pH, dye concentration, TiO 2 /XG concentration, H 2 O 2 concentration, and contact time, were also investigated in a batch photocatalytic reactor. The immobilized TiO 2 /XG catalyst showed a slight adsorption degradation efficiency and then improved the RR and RT dye degradation activity (92.5 and 90.8% in 120 min) under solar light with a remarkable Langmuir–Hinshelwood pseudo-first-order degradation rate of 0.0183 and 0.0151 min −1 , respectively, under optimum conditions of pH 5, dye concentration of 25 mg/L, TiO 2 /XG concentration of 25 mg/L, H 2 O 2 concentration of 400 mg/L, and reaction time of 120 min. The improved photocatalytic ability was ascribed to the impact of TiO 2 /XG nanoparticles with a high surface area, and lower band gap energy. Solar light energy has significant potential for addressing energy deficit and water pollution concerns.

Keywords: TiO 2; xanthan gums; immobilization; photocatalyst batch process; red and turquoise dye; pseudo-first-order kinetics (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/14/10815/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/14/10815/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:14:p:10815-:d:1190701

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().