Flower-like silver bismuthate supported on nitrogen-doped carbon dots modified graphene oxide sheets with excellent degradation activity for organic pollutants.

In this study, a new ternary AgBiO/GO/NCDs composite (GO = graphene oxide, NCDs = nitrogen-doped carbon dots) has been successfully prepared through in-situ growth of flower-like AgBiO on GO/NCDs complex support. The AgBiO/GO/NCDs composite exhibits significantly enhanced degradation activities towards organic pollutants of rhodamine B, phenol and tetracycline. Especially, the refractory tetracycline (20 mg L) can be completely removed within 6.

Nitrogen-doped carbon dots modified dibismuth tetraoxide microrods: A direct Z-scheme photocatalyst with excellent visible-light photocatalytic performance.

In this work, an all solid direct Z-scheme photocatalyst of monoclinic dibismuth tetraoxide microrods/nitrogen-doped carbon dots (m-BiO/NCDs) has been constructed through a simple one-step hydrothermal method. The m-BiO/NCDs photocatalyst exhibits excellent photocatalytic activity for the degradation of methylene orange (MO) and phenol under visible light irradiation. The pollutants of MO (10 mg L) and phenol (45 mg L) could be efficiently degraded by m-BiO/NCDs within 30 and 120 min, respectively, which is much better than that of the single m-BiO, indicating that the introduction of NCDs into m-BiO can effectively improve the photocatalytic activity.

Metal-organic framework derived Fe/FeC@N-doped-carbon porous hierarchical polyhedrons as bifunctional electrocatalysts for hydrogen evolution and oxygen-reduction reactions.

The development of simple and cost-effective synthesis methods for electrocatalysts of hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) is critical to renewable energy technologies. Herein, we report an interesting bifunctional HER and ORR electrocatalyst of Fe/FeC@N-doped-carbon porous hierarchical polyhedrons (Fe/FeC@N-C) by a simple metal-organic framework precursor route. The Fe/FeC@N-C polyhedrons consisting of Fe and FeC nanocrystals enveloped by N-doped carbon shells and accompanying with some carbon nanotubes on the surface were prepared by thermal annealing of Zn[Fe(CN)]·xHO polyhedral particles in nitrogen atmosphere.

g-CN/AgBr nanocomposite decorated with carbon dots as a highly efficient visible-light-driven photocatalyst.

Visible-light-driven photocatalysis as a green technology has attracted intense interest due to its potential applications in environmental remediation. However, the poor visible light utilization and low electron-hole separation efficiency of photocatalysts largely limited their practical application. In this work, a new ternary visible-light driven photocatalyst of g-CN/CDs/AgBr has been prepared by the introduction of carbon dots (CDs) onto the surface of g-CN, followed by in-situ growth of AgBr nanoparticles on CDs-modified g-CN nanosheets.