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Open AccessFeature PaperArticle

Synergistic Effect of Cu2O and Urea as Modifiers of TiO2 for Enhanced Visible Light Activity

1
Institute for Catalysis, Hokkaido University, N21, W10, Sapporo 001-0021, Japan
2
Department of Chemical Technology, Gdansk University of Technology, Narutowicza Str. 11/12, 80-233 Gdansk, Poland
*
Author to whom correspondence should be addressed.
Catalysts 2018, 8(6), 240; https://doi.org/10.3390/catal8060240
Received: 14 March 2018 / Revised: 1 June 2018 / Accepted: 1 June 2018 / Published: 6 June 2018
(This article belongs to the Special Issue Nanomaterials for Environmental Purification and Energy Conversion)
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Abstract

Low cost compounds, i.e., Cu2O and urea, were used as TiO2 modifiers to introduce visible light activity. Simple and cheap methods were applied to synthesize an efficient and stable nanocomposite photocatalytic material. First, the core-shell structure TiO2–polytriazine derivatives were prepared. Thereafter, Cu2O was added as the second semiconductor to form a dual heterojunction system. Enhanced visible light activity was found for the above-mentioned nanocomposite, confirming a synergistic effect of Cu2O and urea (via polytriazine derivatives on titania surface). Two possible mechanisms of visible light activity of the considered material were proposed regarding the type II heterojunction and Z-scheme through the essential improvement of the charge separation effect. View Full-Text
Keywords: photocatalysis; nanocomposites; heterojunction; Cu2O; urea; polytriazine; Z-scheme photocatalysis; nanocomposites; heterojunction; Cu2O; urea; polytriazine; Z-scheme
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Janczarek, M.; Wang, K.; Kowalska, E. Synergistic Effect of Cu2O and Urea as Modifiers of TiO2 for Enhanced Visible Light Activity. Catalysts 2018, 8, 240.

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