Anion-exchange-mediated internal electric field for boosting photogenerated carrier separation and utilization

Abstract Heterojunctions modulated internal electric field (IEF) usually result in suboptimal efficiencies carrier separation and utilization because of the narrow IEF distribution long migration paths photocarriers. In this work, we report distinctive bismuth oxyhydroxide compound nanorods (denoted as BOH NRs) featuring surface-exposed open channels a simple chemical composition; by simply modifying bulk anion layers to overcome limitations heterojunctions, could be readily modulated. Benefiting from unique crystal structure localization valence electrons, intensity increases with atomic number introduced halide anions. Therefore, A low exchange ratio (~10%) anions (I – , Br Cl ) gives rise prominent elevation efficiency better photocatalytic performance for benzylamine coupling oxidation. Here, our work offers new insights into design optimization semiconductor photocatalysts.