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- Title
Au/TiO<sub>2</sub>-gC<sub>3</sub>N<sub>4</sub> Nanocomposites for Enhanced Photocatalytic H<sub>2</sub> Production from Water under Visible Light Irradiation with Very Low Quantities of Sacrificial Agents.
- Authors
Marchal, Clément; Cottineau, Thomas; Méndez‐Medrano, María Guadalupe; Colbeau‐Justin, Christophe; Caps, Valérie; Keller, Valérie
- Abstract
Here for the first time the design and optimization are presented of a threecomponent Au/TiO2-gC3N4 nanocomposite photocatalyst able to efficiently produce H2 from water using very low amounts of sacrificial agents and under visible light irradiation. This enhanced photocatalytic behavior compared to Au/TiO2 and Au/gC3N4 materials is the result of synergetic effects due to high quality assembly and interface between the three components. This optimized nanoscale assembly characterized by simultaneous favorable nanoheterojunction formation between g-C3N4 and TiO2 semiconductors, as well as AuNPs/gC3N4 and AuNPs/TiO2 junctions, leads to enhanced visible light harvesting, charge separation, and H2 production. This composite photocatalyst yields a high H2 production (350 μmol-1 h-1 gcatalyst -1) under visible light irradiation with minimal amounts of sacrificial agent (≤1 vol%), corresponding to activities much higher than reported so far under comparable conditions.
- Subjects
PHOTOCATALYSIS; NANOCOMPOSITE materials; IRRADIATION; NANOSTRUCTURED materials; TITANIUM oxides
- Publication
Advanced Energy Materials, 2018, Vol 8, Issue 14, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.201702142