摘要
Lowering the cost and increasing the efficiency of photocatalysts for hydrogen (H 2 ) evolution remain challenging, especially with eco-friendly materials. With these goals in mind, in this study we adopted tungsten disulfide (WS 2 ) nanosheets, a nonmetallic surface plasmon resonance (SPR) material covering P25 TiO 2 , for plasmon-induced resonance energy transfer (PIRET) to improve the photocarrier response of H 2 evolution. Under simulated solar light irradiation, the optimized 2.4W heterostructure provided a durable and outstanding H 2 evolution rate (321 μmol g −1 h −1 ) that was approximately 55.3 times higher than that of TiO 2 . Raman spectra revealed the presence of dipole–dipole interactions within the WS 2 –TiO 2 heterostructure, while UV–Vis optical absorption spectra indicated that the WS 2 absorption range overlaid the band gap of TiO 2 . Under irradiation with light, the SPR of the WS 2 nanosheets underwent near-field dipole-dipole coupling with the excitons of TiO 2 to increase the number of excitons and inhibit charge recombination. This study suggests the possibility of using nonmetallic SPR materials for efficient solar energy conversion.