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DOI Prefix 10.20431 |
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International Journal of Advanced Research in Chemical Science
Volume-2 Issue-3, 2015, Page No:21-32
Photodegradation of 4-Nitrophenol in Aqueous Suspension by using new Titanium Phosphates Li0.50M0.25Ti2(PO4)3 (M= Ni,Mn,and Co) Catalyzed Processes
Khadija Eddahaoui1, Giuseppe Mele1, Said Benmokhtar2*, Iolanda Pio1, Anna Scarlino1,Rachid Essehli3,Mohamed Abdel Deyab4
1.1Department of Engineering for Innovation of University of Salento, via Arnesano, Lecce, Italy
2.University Hassan II of Casablanca, Faculty of Sciences Ben M'sik, Laboratory of Chemistry and Physics of Materials, Department of Chemistry, Casablanca, Marocco.
3.Qatar Environment and Energy Research Institute (QEERI) Bg CP4, Qatar Foundation, Doha, Qatar.
4.Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt.
2.University Hassan II of Casablanca, Faculty of Sciences Ben M'sik, Laboratory of Chemistry and Physics of Materials, Department of Chemistry, Casablanca, Marocco.
3.Qatar Environment and Energy Research Institute (QEERI) Bg CP4, Qatar Foundation, Doha, Qatar.
4.Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt.
Citation : Photodegradation of 4-Nitrophenol in Aqueous Suspension by using new Titanium Phosphates Li0.50M0.25Ti2(PO4)3 (M= Ni,Mn,and Co) Catalyzed Processes International Journal of Advanced Research in Chemical Science. 2015;2(3):21-32.
Abstract
We have extended our research interest on titanium phosphates M0.50Ti2(PO4)3, with M = Mg, Mn, Fe, Co, Ni, Cu,) to titanium phosphates Li0.5M0.25Ti2(PO4)3 (M= Mn, Co, Ni). Three crystal structures have been determined in rhombohedral system, space group R(N°.167) with a ~ 8.50Å and c ~ 20.95Å.The structures, which are compared to that of Mn0.50Ti2(PO4)3are built up from [TiO6] octahedra and [PO4] tetrahedra which are linked by corner sharing along the c-axis. M2+= Mn2+, Co2+, Ni2+cations are located in half of the antiprism MI sites and are orderly. The corresponding titanium phosphates Li0.5M0.25Ti2(PO4)3 (M= Mn, Co, Ni) photocatalyst were then characterized by means of X-ray diffraction (XRD), FT-IR, Raman and diffused reflectance spectroscopy, (SEM), MEB. The photocatalytic activity of Li0.5M0.25Ti2(PO4)3 (M= Mn, Co, Ni) was investigated by testing the photo-degradation of 4-nitrophenol in aqueous solution under visible light irradiation with the assistance of appropriate amount of H2O2. The results indicated that the photo-degradation of 4-nitrophenol was much enhanced compared with the bare TiO2.
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