Synthesis, characterization and visible light photocatalytic activity of Cr 3+ , Ce 3+ and N co-doped TiO 2 for the degradation of humic acid
KAUST DepartmentAdvanced Nanofabrication and Thin Film Core Lab
Imaging and Characterization Core Lab
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AbstractThe synthesis, characterization and photocatalytic activity of Cr3+ and Ce3+ co-doped TiON (N-doped TiO2) for the degradation of humic acid with exposure to visible light is reported. The synthesized bimetal (Cr3+ + Ce3+) modified TiON (Cr-Ce/TiON), with an evaluated bandgap of 2.1 eV, exhibited an enhanced spectral response in the visible region as compared to pure and Ce3+ doped TiON (Ce/TiON). The XRD analysis revealed the insertion of Cr3+ and Ce3+ in the crystal lattice along with Ti4+ and N that resulted in the formation of a strained TiON anatase structure with an average crystallite size of ∼10 nm. Raman analysis also supported the formation of stressed rigid structures after bimetal doping. HRTEM confirmed the homogeneous distribution of both the doped metallic components in the crystal lattice of TiON without the formation of surface oxides of either Cr3+ or Ce3+. Electron energy loss spectroscopy (EELS) analysis revealed no change in the oxidation of either Cr or Ce during the synthesis. The synthesized Cr-Ce/TiON catalyst exhibited appreciable photocatalytic activity for the degradation of humic acid on exposure to visible light. Additionally, a noticeable mineralization of carbon rich humic acid was also witnessed. The photocatalytic activity of the synthesized catalyst was compared with pristine and Ce3+ doped TiON. © The Royal Society of Chemistry 2015.
CitationRashid SG, Gondal MA, Hameed A, Aslam M, Dastageer MA, et al. (2015) Synthesis, characterization and visible light photocatalytic activity of Cr 3+ , Ce 3+ and N co-doped TiO 2 for the degradation of humic acid . RSC Adv 5: 32323–32332. Available: http://dx.doi.org/10.1039/c5ra00714c.
SponsorsThe support of the Department of Physics KFUPM and the Deanship of Scientific Research through MIT project # MIT11109 & MIT11110 is gratefully acknowledged. A. Hameed and M. Aslam acknowledge the support of Centre of Excellence in Environmental Studies (CEES), King Abdulaziz University and Ministry of Higher Education (MoHE), KSA.
PublisherRoyal Society of Chemistry (RSC)