Synthesis of Fe- and Co-Doped TiO2 with Improved Photocatalytic Activity Under Visible Irradiation Toward Carbamazepine Degradation

被引：112
作者：
El Mragui, Abderrahim [1 ,2 ]
Logvina, Yuliya [1 ]
Pinto da Silva, Luis [1 ,3 ]
Zegaoui, Omar [2 ]
Esteves da Silva, Joaquim C. G. [1 ,3 ]
机构：
[1] Univ Porto, Fac Sci, Chem Res Unit CIQUP, Rua Campo Alegre 697, P-4169007 Porto, Portugal
[2] Moulay Ismail Univ, Fac Sci, CBAE Lab, Res Team Mat & Appl Catalysis MCA, BP 11201, Zitoune, Meknes, Morocco
[3] Univ Porto, Fac Sci, Dept Geosci Environm & Terr Planning, LACOMEPHI,GreenUPorto, Rua Campo Alegre 697, P-4169007 Porto, Portugal
来源：
MATERIALS | 2019年 / 12卷 / 23期
关键词：
doped TiO2; photocatalytic degradation; pharmaceuticals; carbamazepine; UV-A light; visible light; WASTE-WATER; EFFICIENT DEGRADATION; NANOCRYSTALLINE TIO2; MAGNETIC-PROPERTIES; OPTICAL-PROPERTIES; CLOFIBRIC ACID; RAMAN-SPECTRA; THIN-FILM; LIGHT; NANOPARTICLES;
D O I：
10.3390/ma12233874
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Pure TiO2 and Fe- and Co-doped TiO2 nanoparticles (NPs) as photocatalysts were synthesized using wet chemical methods (sol-gel + precipitation). Their crystalline structure and optical properties were analyzed using X-ray diffraction (XRD), Raman spectroscopy and Fourier-transform infrared (FTIR) spectroscopy, ultraviolet-visible light (UV-Vis) diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy. The photocatalytic activity of the synthesized nanoparticles was evaluated through degradation of carbamazepine (CBZ) under UV-A and visible-light irradiations. The XRD and Raman analyses revealed that all synthesized nanomaterials showed only the anatase phase. The DRS results showed that the absorption edge was blue-shifted for Fe-doped TiO2 NPs. The decrease in charge recombination was evidenced from the PL investigation for both Co-doped and Fe-doped TiO2 nanomaterials. An enhancement in photocatalytic degradation of carbamazepine in aqueous suspension under both UV-A light and visible-light irradiations was observed for Fe-doped Titania NPs by comparison with pure TiO2. These results suggest that the doping cations could suppress the electron/hole recombination. Therefore, the photocatalytic activity of TiO2-based nanomaterials was enhanced.
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页数：14
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