An amorphous nickel boride-modified ZnCdS solid solution for enhanced photocatalytic hydrogen evolution.

Author(s) Cao, Y.; Wang, G.; Ma, Q.; Jin, Z.
Journal Dalton Trans
Date Published 2020 Jan 28

In this work, the rational design of amorphous NiB as a co-catalyst for the modification of ZnCdS was achieved. First, NiB was prepared by the redox method and ZnCdS was synthesized by the hydrothermal method. Then, the electrostatic self-assembly method was used to complete the coupling of NiB and ZnCdS. The experimental results of H production showed that when the mass ratio (wt%) of NiB in NiB/ZnCdS was 7 wt%, it had the highest activity, and the hydrogen production could reach 1521 μmol under irradiation with light for 5 h. The hydrogen production activity of the composite catalyst was 4.75 times higher than that of pure ZnCdS. The improvement in the photocatalytic activity can be attributed to the following aspects: (i) UV-vis DRS showed that the addition of NiB increased the absorption of visible light; (ii) the PL, TRPL, IT, EIS and LSV experiments further proved that the composite catalyst had excellent photoelectrochemical properties; (iii) the zeta potential results indicated that the electrostatic attraction between NiB and ZnCdS provided favorable conditions for the rapid transfer of electrons. This work shows that amorphous NiB has a prominent effect on the modification of ZnCdS, which provides more ways for the study of photocatalytic H evolution.

DOI 10.1039/c9dt04311j
ISSN 1477-9234
Citation Dalton Trans. 2020;49(4):12201231.

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