首页|Gram-scale batch production of novel CdS hollow hexagonal prisms by a molten salt method and the improved photocatalytic stability
Gram-scale batch production of novel CdS hollow hexagonal prisms by a molten salt method and the improved photocatalytic stability
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NSTL
Elsevier
It remains a significant challenge to obtain CdS photocatalysts with high stability on a large scale. In this work, CdS are prepared using a simple KSCN molten salt method (CdS-MS) and conventional hydrothermal method (CdS-HT), respectively. CdS-MS consists of novel hollow hexagonal prisms, which is not reported so far. Under visible light irradiation (λ > 400 nm), CdS-MS shows a higher photocatalytic activity for the degradation of phenol, norfloxacin and RhB, which are 2.27, 2.11 and 1.05 times higher than CdS-HT. The higher photocatalytic activity of CdS-MS is mainly attributed to the novel hollow hexagonal prism microstructure and more sulfur defects, leading to the greater oxidation potential and higher charge separation efficiency. Furthermore, CdS-MS shows outstanding cycle stability. After four cycles, 90.6% of the degradation efficiency is retained for CdS-MS, while only 68.3% of the degradation efficiency is retained for CdS-HT. The higher stability of CdS-MS is mainly attributed to its unique morphology and surface valence of sulfur, which make it more difficult to agglomerate and occur photocorrosion, respectively. The reported method is simple and high-yielding, which is easy to extend to mass production.
CdSHollow hexagonal prismMolten salt methodPhotocatalytic degradationSulfur defect
Lu Z.、Ma B.、Ruan W.、Liu Z.、Teng F.、Hao W.、Zhang J.、Yuan C.
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Jiangsu Engineering and Technology Research Centre of Environmental Cleaning Materials (ECM) Collaborative Innovation Centre of Atmospheric Environment and Equipment Technology (CICAEET) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pol
NSTL
Elsevier
