Enhanced Electron Transfer from the Excited Eosin Y to mpg-C3N4 for Highly Efficient Hydrogen Evolution under 550 nm Irradiation

摘要: Graphitic carbon nitride (g-C3N4) is a novel and stable metal-free photocatalyst that can generate H2 from water under visible light irradiation, but its activity significantly limited due to the insufficient absorption in solar spectrum (weak wavelength longer than 460 nm). In this paper, we demonstrate photoresponse of mesoporous g-C3N4 (mpg-C3N4) be greatly extended up nearly 600 nm by sensitization with Eosin Y (EY). This demonstrates high rather photocatalytic for evolution especially regions (450–600 The apparent quantum efficiency (AQE) 19.4% 550 irradiation has been obtained. These results indicate efficient electron transfer between excited EY molecules mpg-C3N4 achieved. surface area nanoporous structure facilitate assembly on surface, thus promoting ...