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Synthesis and luminescence of ceria decorated graphene quantum dots (GQDs): Evolution of band gap

Kharangarh, Poonam R and Umapathy, Siva and Singh, Gurmeet (2017) Synthesis and luminescence of ceria decorated graphene quantum dots (GQDs): Evolution of band gap. In: International Conference on Technologically Advanced Materials (ICTAM), NOV 07-11, 2016, Univ Delhi, New Delhi, INDIA, pp. 114-123.

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Official URL: http://dx.doi.org/10.1080/10584587.2017.1368801

Abstract

Graphene quantum dots (GQDs) and CeO2-GQDs were synthesized by using a facile hydrothermal method at 140 degrees C. All the synthesized materials were characterized by TEM, UV-Vis Spectroscopy, FT-IR, Raman Spectroscopy and PL. Ceria decorated GQDs show different emission peaks with different excitation of wavelengths. The discrete change in dominant luminescence features of the GQDs and their composites indicate that the variation in PL occurs because of alteration in its shape, size and bandgap. Based on the experimental results of PL peak wavelength, the emission is attributed to quasi-molecular PL from the fragments composed of a few aromatic rings with oxygen containing functional groups.

Item Type: Conference Paper
Additional Information: Copy right for this article belongs to the TAYLOR & FRANCIS LTD, 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Id for Latest eprints
Date Deposited: 29 Dec 2017 09:58
Last Modified: 29 Dec 2017 09:58
URI: http://eprints.iisc.ac.in/id/eprint/58559

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