title: Electrosorption and photocatalytic one-stage combined process using a new type of nanosized TiO₂/activated charcoal plate electrode.
abstract: In the present study, an activated charcoal (AC) plate was prepared by physical activation method. Its surface was coated with TiO₂ nanoparticles by electrophoretic deposition (EPD) method. The average crystallite size of TiO₂ nanoparticles was determined approximately 28 nm. The nature of prepared electrode was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) surface area measurement before and after immobilization. The electrosorption and photocatalytic one-stage combined process was investigated in degradation of Lanasol Red 5B (LR5B), and the effect of dye concentration, electrolyte concentration, pH, voltage, and contact time was optimized and modeled using response surface methodology (RSM) approach. The dye concentration of 30 mg L(-1), Na₂SO₄ concentration of 4.38 g L(-1), pH of 4, voltage of 250 mV, and contact time of 120 min were determined as optimum conditions. Decolorization efficiency increased in combined process to 85.65% at optimum conditions compared to 66.03% in TiO₂/AC photocatalytic, 20.09% in TiO₂/AC electrosorption, and 1.91% in AC photocatalytic processes.
authors.affiliation: Research Laboratory of Environment Protection Technology, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
authors.forename: Baharak
authors.initials: B
authors.lastname: Ayoubi-Feiz
authors.forename: Soheil
authors.initials: S
authors.lastname: Aber
authors.forename: Alireza
authors.initials: A
authors.lastname: Khataee
authors.forename: Esmaeel
authors.initials: E
authors.lastname: Alipour
mesh_terms: D000327:Adsorption; D002384:Catalysis; D002606:Charcoal / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects; D013431:Sulfates / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D004396:Coloring Agents; D013431:Sulfates; D014874:Water Pollutants, Chemical; C012036:sodium sulfate; C009495:titanium dioxide; D002606:Charcoal; D014025:Titanium
references.citation: Chemosphere. 2012 Jun;88(2):145-54
references.pmid: 22483728
references.citation: Environ Sci Technol. 2010 Mar 1;44(5):1780-5
references.pmid: 20121179
references.citation: J Colloid Interface Sci. 2012 Dec 15;388(1):201-8
references.pmid: 23010321
references.citation: Water Res. 2006 Jan;40(2):213-20
references.pmid: 16384594
references.citation: J Colloid Interface Sci. 2011 Mar 1;355(1):204-9
references.pmid: 21194708
references.citation: Chemosphere. 2012 May;87(6):614-20
references.pmid: 22342334
references.citation: J Hazard Mater. 2012 Jan 15;199-200:226-32
references.pmid: 22115840