A new route for visible/near-infrared-light-driven H-2 production over titania: Co-sensitization of surface charge transfer complex and zinc phthalocyanine

作者：Zhang Xiaohu; Peng Bosi; Peng Tianyou^*; Yu Lijuan; Li Renjie; Zhang Jing

来源：Journal of Power Sources, 2015, 298: 30-37.

DOI：10.1016/j.jpowsour.2015.08.040

• Surface charge transfer complex
• Dye co-sensitization
• Photocatalytic hydrogen production
• Visible/near-infrared-light utilization
• Stability

This work introduces a new strategy for visible/near-infrared (NIR) light responsive H-2 production over TiO2 nanoparticles co-sensitized with zinc phthalocyanine derivative (Zn-tri-PcNc) and surface ligand-to-metal charge transfer (LMCT) complex, which is in situ formed on the TiO2 nanoparticles' surfaces by using ascorbic acid (AA). The in situ formed surface LMCT complex (AA-TiO2) exhibits obvious visible-light-responsive photoactivity (126.2 pmol/h) for H-2 production with a high apparent quantum yield (AQY) of 16.1% at 420 nm monochromatic light irradiation. Moreover, the co-sensitized TiO2 nanoparticles (Zn-tri-PcNc-TiO2-AA) shows a much higher photoactivity (162.2 mu mol/h) for H-2 production than the surface LMCT complex, and broader spectral responsive region (400-800 nm) with a relatively high AQY value (0.97%) at 700 nm monochromatic light irradiation. The present result reveals a possible substitute for the conventional Ru(II)-bipyridyl complexes or organic dyes as sensitizer of semiconductors in the field of solar fuel conversion.

• 出版日期2015-12-1
• 单位武汉大学