Next, the CNx|Ni2P photocatalyst was employed for the photoreforming of the pretreated plastic films under similar conditions (Figure ; Tables ). Although the trend for H2 production using CNx|Ni2P was similar to that observed in the case TiO2|Pt, the performance was ~30-40 times lower and only the oxidation product of PCL photoreforming, i.e., pentanal could be quantified (0.6±0.4 and 0.2±0.05 µmol from Dura and LCC-pretreatment, respectively; Figure , Table ). The choice of CNx|Ni2P arises from its ability to absorb in the visible region (and for being precious-metal free), as opposed to TiO2|Pt, which absorbs primarily in the UV region (Figure ). This is further confirmed by tests using a λ>410 nm cut-off filter, which showed that the TiO2|Pt was marginally active (retained only ~0.3% of the activity without filter) towards photoreforming as compared to CNx|Ni2P when using only visible light (Figure ).