title: Evaluation of the photocatalytic activity of Ln3+-TiO2 nanomaterial using fluorescence technique for real wastewater treatment.
abstract: Evaluation the photocatalytic activity of different Ln(3+) modified TiO2 nanomaterials using fluorescence based technique has rarely been reported. In the present work, xmol Ln(3+) modified TiO2 nanomaterials (Ln = Nd(3+), Sm(3+), Eu(3+), Gd(3+), Dy(3+) and Er(3+) ions; x = 0.005, 0.008, 0.01, 0.02 and 0.03) were synthesized by sol-gel method and characterized using different advanced techniques. The photocatalytic efficiency of the modified TiO2 expressed in the charge carrier separation and OH radicals formation were assigned using TiO2 fluorescence quenching and fluorescence probe methods, respectively. The obtained fluorescence measurements confirm that doping treatment significantly decreases the electron-hole recombination probability in the obtained Ln(3+)/TiO2. Moreover, the rate of OH radicals formation is increased by doping. The highly active nanoparticles (0.02Gd(3+)/TiO2 and 0.01Eu(3+)/TiO2) were applied for industrial wastewater treatment using solar radiation as a renewable energy source.
authors.affiliation: Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, 11711 Cairo, Egypt. Electronic address: mona_saif1@yahoo.com.
authors.forename: M
authors.initials: M
authors.lastname: Saif
authors.affiliation: Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, 11711 Cairo, Egypt.
authors.forename: S M K
authors.initials: SM
authors.lastname: Aboul-Fotouh
authors.affiliation: Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, 11711 Cairo, Egypt.
authors.forename: S A
authors.initials: SA
authors.lastname: El-Molla
authors.affiliation: Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, 11711 Cairo, Egypt.
authors.forename: M M
authors.initials: MM
authors.lastname: Ibrahim
authors.affiliation: Department of Chemistry, Faculty of Science (Girls), Al-Azhar University, Nasr City, Cairo, Egypt.
authors.forename: L F M
authors.initials: LF
authors.lastname: Ismail
mesh_terms: D002384:Catalysis; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D055668:Photochemical Processes; D014025:Titanium / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D028581:Lanthanoid Series Elements; D014025:Titanium; D062065:Wastewater; C009495:titanium dioxide
keywords: Fluorescence; Lanthanide; Sol–gel; TiO(2); Wastewater