Solar electricity and fuel production with perylene monoimide dye-sensitised TiO2 in water.

摘要: Dye-sensitisation of TiO2 and other metal oxides is an established strategy to couple solar light harvesting with efficient charge separation for the production electricity in dye-sensitised cells (DSCs) or fuels semiconductor photocatalysis (DSP). Perylene monoimide (PMI) dyes have emerged as promising organic dyes, but they not previously been used a functional assembly aqueous solution. Here, five novel PMI bearing carboxylic acid, phosphonic acetylacetone, hydroxyquinoline dipicolinic acid anchoring groups attachment onto are reported. We identified DSC DSP systems PMI-sensitised solution, which permitted side-by-side comparison respect performance between two systems. Structure–activity relationships allowed us suggest anchor-condition-system associations suit specific at various pH values, different electron mediators (redox sacrificial donor) catalysts schemes. A sensitised hydroxyquinoline-modified dye reached highest short-circuit current density (JSC ≈ 1.4 mA cm−2) electrolyte solution during irradiation simulated light. This also achieved turnover number (TONPMI) approximately 4900 proton reduction after 24 h scheme Pt H2-evolving co-catalyst 4.5. was only surpassed by acid-bearing dye, new benchmark (TONPMI 1.1 × 104 72 h) nanoparticulate fuel production. At higher (8.5), our results showed that group allows due stronger ability. study provides platform chemistry gives valuable insights into