Comparative Study of Structural and Photocatalytic Properties of M-Doped (M = Ce³⁺, Zn²⁺, Cu²⁺) Dendritic-Like CdS

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• 作者：Yongqian Wang ; Xiande Yang ; Ting Ye ; Chao Xu ; Fan Xia…
• 关键词：Ce ; doped dendritic ; like CdS ; Zn ; doped dendritic ; like CdS ; Cu ; doped dendritic ; like CdS ; photocatalytic activity ; photocatalytic mechanism
• 刊名：Journal of Electronic Materials
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：46
• 期：3
• 页码：1598-1606
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials; Electronics and Microelectronics, Instrumentation; Solid State Physics;
• 出版者：Springer US
• ISSN：1543-186X
• 卷排序：46

文摘

M-doped (M = Ce3+, Zn2+, Cu2+) dendritic-like CdS has been synthesized by a hydrothermal method. As-prepared samples were characterized by x-ray diffraction (XRD) analysis, field-emission scanning electron microscopy (FESEM), energy-dispersive spectroscopy (EDS), and ultraviolet–visible (UV–Vis) spectroscopy. Their photocatalytic activity was evaluated in degradation of methylene blue under simulated visible-light irradiation. XRD results revealed that M:CdS is a hexagonal phase at low doping concentration. XRD and EDS results indicated that Ce3+, Zn2+, and Cu2+ were successfully introduced into CdS. FESEM results indicated that CdS retains dendritic-like structure at low doping concentration. UV–Vis spectroscopy results indicated that doping with Ce3+, Zn2+ or Cu2+ can be used to improve the absorbing capability of dendritic-like CdS for visible light, and the doping content affects the bandgap. Photocatalytic results indicated that doping with Ce3+, Zn2+ or Cu2+ can improve the photocatalytic efficiency of dendritic-like CdS, with highest degradation rates of 93.2%, 91.2%, and 95.5% for Ce:CdS, Zn:CdS, and Cu:CdS, respectively. The photocatalytic mechanism of M:CdS in degradation of methylene blue is also described.