Synergistic effect of oxygen vacancies and Ni particles over the ZnWO₄/CdS heterostructure for enhanced photocatalytic reduction and oxidation activities

Abstract

Optimization of charge transfer pathway is of great significance in a capable photocatalytic system with heterostructure for the excellent reducibility and oxidizability. Here we synthesize a well-built photocatalysts of oxygen...

Anchoring of NiCox alloy nanoparticles on nitrogen vacancy-rich carbon nitride nanotubes toward promoting efficiently photocatalytic CO2 conversion into solar fuel

“…The activity of CO 2 -to-CO photoreduction is obviously further enhanced by loading Ni NPs, possibly because Ni species are the active sites and can be considered as an electron pump to promote the separation of photogenerated electron-hole pairs, resulting in accelerated reaction kinetics of CO 2 to CO photoreduction. 56 The small amount of CH 4 is identified over Co/V N -CNNTs, indicating that Co sites could change the reaction path for CO 2 reduction in some degree through promoting the eight-electron reduction of CO 2 -to-CH 4 (CO 2 + 8H + + 8e − = CH 4 + 2H 2 O). Loading of the NiCo x alloy NPs enables to enhance generation of CH 4 , and the increase of Co amount can further improve the production of CH 4 .…”

Swallowed Embedding of Nanopetal-Rich Microflowers in Flexible Photocatalytic and Thermoresponsive Functional Composite Fibers

“…To date, it is still a great challenge to develop suitable strategies to optimize the separation rate of carriers and maximize the photocatalytic activity of BiOBr. − It has been demonstrated that the size and shape of photocatalysts have an impact on photocatalytic performance. − For example, a 2D nanosheet structure with a large specific surface area provides more reaction sites and thus promotes photocatalytic reactions. − Among the various shapes of BiOBr, − the flower-shaped microsphere structure of BiOBr enriched with nanosheets maximizes its specific surface area while promoting the adsorption of pollutants . In addition, doping rare earth ions into BiOBr is an effective way to enhance the separation efficiency of electron–hole pairs. − However, the rapid recombination of photogenerated carriers and the high surface energy of microspheres result in severe aggregation, thus imposing limitations on photocatalytic activity. − Assembling microspheres on fibers provides a feasible way to prevent agglomeration and facilitates recycling. − …”