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Journal of Electronic Materials

, Volume 48, Issue 5, pp 2895–2901 | Cite as

Photocatalytic Performance of Cubic and Hexagonal Phase CdS Synthesized via Different Cd Sources

  • Xiande Yang
  • Boyou Wang
  • Yu Mu
  • Mingyan ZhengEmail author
  • Yongqian WangEmail author
Article
  • 48 Downloads

Abstract

CdS has been widely used in photocatalysis, by virtue of its sensitivity to visible-light irradiation. But CdS has two crystalline phases, which are not equally well understood. Hence, we synthesized cubic phase and hexagonal phase hierarchical CdS with different Cd sources by the hydrothermal method. These as-prepared CdS samples were characterized by powder x-ray diffraction (PXRD), field emission scanning electron microscopy (FESEM), ultraviolet–visible spectrophotometer (UV–Vis), and room temperature photoluminescence (PL). Photocatalytic degradation of methylene blue was evaluated under simulated visible-light irradiation. PXRD results revealed that the CdS samples manifested a cubic phase when the Cd source was CdCl2, but the CdS assumed a mixed hexagonal and cubic phase when the Cd source was Cd(NO3)2. FESEM results indicate that the morphologies of CdS are both flower-like structures. The optical energy band gap of cubic phase CdS is 2.26 eV, but mixed hexagonal and cubic phase CdS is 2.24 eV according to UV–Vis results. PL results show that CdS samples of both phases have a similar emission peak near 560 nm, which is consistent with UV–Vis absorption spectrums. In addition, mixed hexagonal and cubic phase CdS exhibits better photocatalytic activity than cubic phase CdS.

Keywords

Cd source cubic CdS hexagonal CdS photocatalytic activity 

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Notes

Acknowledgments

This work was supported by the Startup Foundation for Advanced Talents of China University of Geosciences (No. 009-162301132613), Open Research Topic for Engineering Research Center of Nano-Geomaterials of Ministry of Education of China University of Geosciences (No. NGM2018KF019). The financial support was gratefully appreciated.

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and ChemistryChina University of GeosciencesWuhanPeople’s Republic of China
  2. 2.Faculty of EngineeringChina University of GeosciencesWuhanPeople’s Republic of China

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