Journal
JOURNAL OF LUMINESCENCE
Volume 188, Issue -, Pages 129-134Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2017.04.011
Keywords
Reduced graphene oxide; Photoreduction; Graphene oxide; Real-time analysis; Titanium dioxide; Photocatalytic reduction
Categories
Funding
- INFN-CNR national project (PREMIALE) EOS
- Regione Campania (INTERFET project) [5/02]
- Italian Ministry of Foreign Affairs and International Cooperation (NANOGRAPH Project)
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Reduction of graphene oxide (GO) is a key process toward simple and massively scalable production of graphene. Analytic techniques such as X-Ray diffraction, X-Ray photoemission spectroscopy and Raman spectroscopy are excellent for ex-situ post-process assessment of the state of reduction of GO, but are unsuited for a real-time analysis during the process itself. In this work, we show that photoluminescence (PL) spectroscopy can be effectively used to this aim, allowing tracing the time dynamics of photoreduction processes. A proof-of-concept is shown, using a low-cost setup, by considering the case of pristine GO samples and of GO/titanium dioxide (TiO2) composites. We show that the PL analysis allows evidencing in real time the TiO2-induced photocatalytic contribution to GO photoreduction and the changes in photoreduction rates caused by the presence of oxygen and water molecules adsorbed on GO surfaces.
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