Journal
DALTON TRANSACTIONS
Volume 49, Issue 4, Pages 1220-1231Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9dt04311j
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Funding
- Chinese National Natural Science Foundation [41663012, 21862002]
- Open Project of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University [2019-KF-36]
- new technology and system for clean energy catalytic production, major scientific project of North Minzu University [ZDZX201803]
- Ningxia low-grade resource high value utilization and environmental chemical integration technology innovation team project, North Minzu University
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In this work, the rational design of amorphous NixB as a co-catalyst for the modification of ZnxCd1-xS was achieved. First, NixB was prepared by the redox method and ZnxCd1-xS was synthesized by the hydrothermal method. Then, the electrostatic self-assembly method was used to complete the coupling of NixB and ZnxCd1-xS. The experimental results of H-2 production showed that when the mass ratio (wt%) of NixB in NixB/ZnxCd1-xS was 7 wt%, it had the highest activity, and the hydrogen production could reach 1521 mu mol under irradiation with light for 5 h. The hydrogen production activity of the composite catalyst was 4.75 times higher than that of pure ZnxCd1-xS. The improvement in the photocatalytic activity can be attributed to the following aspects: (i) UV-vis DRS showed that the addition of NixB 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 NixB and ZnxCd1-xS provided favorable conditions for the rapid transfer of electrons. This work shows that amorphous NixB has a prominent effect on the modification of ZnxCd1-xS, which provides more ways for the study of photocatalytic H-2 evolution.
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