Next Article in Journal
Multi-Space Seasonal Precipitation Prediction Model Applied to the Source Region of the Yangtze River, China
Previous Article in Journal
Operational Improvement of Main Pumps for Energy-Saving in Wastewater Treatment Plants
Previous Article in Special Issue
Activated Carbon and the Principal Mineral Constituents of a Natural Soil in the Presence of Carbamazepine
Open AccessFeature PaperArticle

Bifunctional g-C3N4/WO3 Thin Films for Photocatalytic Water Purification

Institute of Nanoscience and Nanotechnology, National Center for Scientific Research “Demokritos”, 15341 Agia Paraskevi, Athens, Greece
Author to whom correspondence should be addressed.
Water 2019, 11(12), 2439;
Received: 30 October 2019 / Revised: 19 November 2019 / Accepted: 19 November 2019 / Published: 21 November 2019
(This article belongs to the Special Issue Advances in Water and Wastewater Monitoring and Treatment Technology)
A bifunctional thin film photocatalyst consisting of graphitic carbon nitride on tungsten trioxide (g-C3N4/WO3) is introduced for the improvement of photocatalytic activity concerning hexavalent chromium reduction and methylene blue dye removal in water, compared to the bare, widely used WO3 semiconductor. A bilayered structure was formed, which is important for the enhancement of the charge carriers’ separation. The characterization of morphological, structural, optoelectronic, and vibrational properties of the photocatalysts permitted a better understanding of their photocatalytic activity for both dye degradation and Cr+6 elimination in water and the analysis of the photocatalytic kinetics permitted the determination of the corresponding pseudo-first-order reaction constants (k). Trapping experiments performed under UV illumination revealed that the main active species for the photocatalytic reduction of Cr+6 ions are electrons, whereas in the case of methylene blue azo-dye (MB) oxidation, the activation of the corresponding photocatalytic degradation comes via both holes and superoxide radicals. View Full-Text
Keywords: tungsten oxide; graphitic carbon nitride; photocatalysis; methylene blue; hexavalent chromium tungsten oxide; graphitic carbon nitride; photocatalysis; methylene blue; hexavalent chromium
Show Figures

Graphical abstract

MDPI and ACS Style

Antoniadou, M.; Arfanis, M.K.; Ibrahim, I.; Falaras, P. Bifunctional g-C3N4/WO3 Thin Films for Photocatalytic Water Purification. Water 2019, 11, 2439.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop