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• W3087922662 endingPage "147904" @default.
• W3087922662 startingPage "147904" @default.
• W3087922662 abstract "• Optimizing g-C 3 N 4 synthesis produced a material with high photocatalytic activity. • Sono-assisted g-C 3 N 4 /WO 3 synthesis generated effective heterojunctions. • Synthesized composite presented high photocatalytic activity under visible light. • The experiments indicated the formation of an effective Z-scheme heterojunction. • Model-pollutant degradation mechanism undergo though superoxide radical. This study reports the optimization of the g-C 3 N 4 synthesis by the melamine-annealing route using the Response Surface Methodology (RSM) and its direct coupling to WO 3 by a simple sono-assisted synthesis of g-C 3 N 4 :WO 3 heterojunctions, with good materials homogenization, effective interface, and proper energy levels. The optimized synthetic conditions were: 605 °C, 183 min, and 5 °C min −1 , producing a high-quality material in comparison with the ones reported in papers published between 2016 and 2020, as far as bandgap energies and specific surface areas are concerned (SSA/Eg ratio). The highest photocatalytic activity was observed in the 80:20 (wt.%) heterostructure. That material presented a high visible response, being capable of completely degrading the model-pollutant approximately four times faster than g-C 3 N 4 . The efficient flux of photo-generated electrons though a Z-Scheme heterojunction promoted a superior superoxide radical formation, resulting in increased pollutant degradation. Finally, a complete mechanism for the heterostructure photocatalysis was proposed based on theoretical and experimental results." @default.
• W3087922662 created "2020-10-01" @default.
• W3087922662 creator A5016096822 @default.
• W3087922662 creator A5028662422 @default.
• W3087922662 creator A5060248026 @default.
• W3087922662 date "2021-01-01" @default.
• W3087922662 modified "2023-10-17" @default.
• W3087922662 title "Improving g-C3N4:WO3 Z-scheme photocatalytic performance under visible light by multivariate optimization of g-C3N4 synthesis" @default.
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