Doping-induced coloration in titania

Mane, R.B. and Panigrahi, B.B. and et al, . (2021) Doping-induced coloration in titania. Journal of the American Ceramic Society, 104 (7). pp. 2932-2936. ISSN 00027820

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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 powder. © 2021 The American Ceramic Society

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IITH Creators:
IITH CreatorsORCiD
Panigrahi, Bharat BhooshanUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: bandgap, doping, titanium dioxide, X-ray photoelectron spectroscopy
Subjects: Others > Metallurgy Metallurgical Engineering
Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: Mrs Haseena VKKM
Date Deposited: 01 Jun 2022 10:18
Last Modified: 01 Jun 2022 10:18
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