Doping‐induced coloration in titania

Mane, Rahul B. and Sahoo, Ramkrishna and Reddy, Bapathi Kumaar Swamy and Ravula, Vijay and Panigrahi, Bharat B. and Borse, Pramod H. and Chakravarty, Dibyendu (2021) Doping‐induced coloration in titania. Journal of the American Ceramic Society, 104 (7). pp. 2932-2936. ISSN 0002-7820

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Thermal decomposition of Ti3GeC2 MAX phase at 1773 K yields an orange-colored titania powder. Micro-XRD of the powder under oscillation mode reveals a pure rutile phase (space group P42/mnm). X-ray photoelectron spectroscopy confirmed substitutional doping of Ge in the titania lattice. The presence of Ti-O-Ge bond was observed in O 1s spectrum and confirmed by the shift in binding energy in Ti 2p3/2 and Ge 3d peaks. The UV-visible Diffuse Reflectance Spectrum studies on the Ge-doped titania powder show wide absorption in the visible region (380 to 650 nm) yielding a bandgap of 2.83 eV, which is desirable for photocatalytic applications. Defect states formed due to Ge doping led to lowering of the titania conduction band inducing an orange coloration in the powde

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IITH Creators:
IITH CreatorsORCiD
Panigrahi, Bharat BhooshanUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Defect state; Diffuse reflectance spectrum; Doped titania; Oscillation mode; Photocatalytic application; Rutile phase; Titania powders; Visible region;Absorption spectroscopy; Binding energy; Citrus fruits; Decomposition; Germanium; Oxide minerals; Titanium dioxide; X ray photoelectron spectroscopy
Subjects: Social sciences
Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 27 Jul 2021 04:14
Last Modified: 04 Mar 2022 04:42
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