Ternary g-C3N4/NiOOH/Ag nanocomposite photocatalyst with efficient charges separation and high activity for H2 production. (15th November 2020)

• Record Type: Journal Article
• Authors: Jiménez-Rangel, K.; Samaniego-Benítez, J.E.; Lartundo-Rojas, L.; Calderón, H.A.; Mantilla, A.
• Is Part Of: Fuel. Volume 280(2020)
• Publication Date: 2020-11-15
• Subjects: Photocatalyst -- g-C3N4 -- Ternary nanocomposite -- Hydrogen -- NiOOH photocatalysts -- Silver Plasmon; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2020.118672
• Languages: English
• ISSNs: 0016-2361

Abstract

Graphical abstract: Highlights: A ternary g-C3 N4 /NiOOH/Ag nanocomposite was obtained by a three steps methodology. g-C3 N4 /NiOOH/Ag was evaluated as photocatalyst for H2 production from water. H2 yield in the photocatalytic test was 40% higher than that obtained with g-C3 N4. Higher photoactivity of g-C3 N4 /NiOOH/Ag may be due to low e - / h + recombination rate. Abstract: A ternary g-C3 N4 /NiOOH/Ag nanocomposite photocatalyst was synthesized using a combination of chemical and photoreduction methods. Physical, chemical and optical properties of the obtained material were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV–Vis diffuse reflection (DRS) and X-ray photoelectron spectroscopies (XPS). The photoactivity of g-C3 N4 /NiOOH/Ag nanocomposite was evaluated for the H2 production from a water/methanol solution under irradiation with a low intensity UV–Vis lamp. The results showed that photoactivity obtained with the nanocomposite, measured as H2 yield, was superior than those obtained using bare g-C3 N4, g-C3 N4 -Ag and g-C3 N4 -Ni as photocatalysts. This increase could be due to the effect of a lower electron-hole recombination rate, derived of an efficient charges separation, and to the synergistic effect between the compounds which integrate the material.