Abstract
? 2022Novel ionic state Co passivated carbon nanodots (Co-CDs) combined with NH2-MIL-125 as efficient photocatalysts Co-CDs/NH2-MIL-125 were fabricated in a convenient process for the first time. These materials exhibited excellent photocatalytic activity in both NO purification and hydrogen production under visible light irradiation. The NO purification rate of Co-CDs/NH2-MIL-125 increased to 46.6%, which was 20.2% and 13.4% higher than that of NH2-MIL-125 and CDs/NH2-MIL-125, respectively. Moreover, the hydrogen production efficiency of Co-CDs/NH2-MIL-125 reached 2261 μmol g?1, which was 6.86 times and 3.54 times of the values for NH2-MIL-125 and CDs/NH2-MIL-125, respectively. The corresponding properties characterized by Mott-Schottky, UCPL, and in situ DRIFTS, indicated that the introduction of Co2+ could not only passivate the CDs to further improve physicochemical properties, but also enhance the photocatalytic activity via the photosensitization and up-conversion effect. This research provides a promising strategy that adding active metal ions passivated CDs in the catalyst platform to improve photocatalytic performance.
NSTL
Elsevier