3 years ago

NH2-MIL-125(Ti)/graphitic carbon nitride heterostructure decorated with NiPd co-catalysts for efficient photocatalytic hydrogen production

NH2-MIL-125(Ti)/graphitic carbon nitride heterostructure decorated with NiPd co-catalysts for efficient photocatalytic hydrogen production
In this study, a highly efficient photocatalyst, NH2-MIL-125(Ti)/g-C3N4/NiPd (NH2-MIL-125(Ti)/CN/NiPd), was successfully synthesized for photocatalytic water reduction to produce H2. Under visible-light irradiation, the prepared NH2-MIL-125(Ti)/CN/NiPd composite clearly showed enhanced photocatalytic performance for H2 evolution compared to NH2-MIL-125(Ti), NH2-MIL-125(Ti)/CN, and NH2-MIL-125(Ti)/NiPd. The as-synthesized NH2-MIL-125(Ti)/0.75CN/Ni15.8Pd2.1 photocatalyst exhibited a high H2 production rate of 8.7mmolg−1 h−1, 322 and 1.3 times higher than those of NH2-MIL-125(Ti)/0.75CN and NH2-MIL-125(Ti)/Ni15.8Pd4.1, respectively. The enhanced photocatalytic performance can be attributed to the intimate interfacial contact between NH2-MIL-125(Ti) and CN, accelerating the charge transfer, as well as loaded NiPd nanoparticles, increasing the light-absorbing capacity and accelerating the charge transfer of NH2-MIL-125(Ti)/CN. This work demonstrates that the addition of appropriate co-catalysts onto MOF/CN hybrid with intimate contact interface provides a new approach to design highly efficient and solar-energy-harvesting photocatalysts.

Publisher URL: www.sciencedirect.com/science

DOI: S0926337317306860

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