Carbon nitride-TiO₂ hybrid modified with hydrogenase for visible light driven hydrogen production.

ABSTRACT: A system consisting of a [NiFeSe]-hydrogenase (H₂ase) grafted on the surface of a TiO₂ nanoparticle modified with polyheptazine carbon nitride polymer, melon (CN _x ) is reported. This semi-biological assembly shows a turnover number (TON) of more than 5.8 × 10⁵ mol H₂ (mol H₂ase)^-1 after 72 h in a sacrificial electron donor solution at pH 6 during solar AM 1.5 G irradiation. An external quantum efficiency up to 4.8% for photon-to-hydrogen conversion was achieved under irradiation with monochromatic light. The CN _x -TiO₂-H₂ase construct was also active under UV-free solar light irradiation (λ > 420 nm), where it showed a substantially higher activity than TiO

SUBMITTER: Caputo CA 

PROVIDER: S-EPMC5512016 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature