Citation: GAO Xiao-Ming, SHANG Yan-Yan, LIU Li-Bo, GAO Kai-Long. Preparation and Photocatalytic Nitrogen Fixation Performance of Cd Doping δ-Bi₂O₃ Nanosheets[J]. Chinese Journal of Inorganic Chemistry, ;2019, 35(4): 580-588. doi: 10.11862/CJIC.2019.092 shu

Preparation and Photocatalytic Nitrogen Fixation Performance of Cd Doping δ-Bi₂O₃ Nanosheets

Shaanxi Key Laboratory of Chemical Reaction Engineering, Department of Chemistry and Chemical Engineering, Yan′an University, Yan′an, Shaanxi 716000, China

Corresponding author: GAO Xiao-Ming, dawn1026@163.com
Received Date: 2 January 2019
Revised Date: 22 February 2019

Figures(11)

Cd-doped δ-Bi₂O₃ (Cd-δ-Bi₂O₃) were prepared by the alcoholic-hydrothermal method, and characterized by X-ray diffraction (XRD), transmission electron microscope (TEM) and so on. The results showed that Cd-δ-Bi₂O₃ was assembled by 2D nanosheets. Cd in the form of Cd²⁺ was introduced in the lattice gap of δ-Bi₂O₃ and belonged to interstitial doping. Due to Cd doping, the band gap was decreased, the light-harvesting capability was enhanced, and the transmission and separation efficiency of carriers was improved. At room temperature and atmospheric pressure, the photocatalytic nitrogen fixation was investigated under visible light irradiation. The results showed that the photocatalytic nitrogen fixation rate of 6%Cd-δ-Bi₂O₃ with 3 h of light irradiation was 1.6 mmol·g^-1·h^-1·L^-1, which was 10.67 times higher than that of δ-Bi₂O₃. The mechanism of photocatalytic N₂ fixation was discussed by means of photocurrent and impedance. Doping Cd defect serves as the trap of photogenerated electrons, which delays the surface transfer of photogenerated electrons and enhances the chemisorption of target molecules.
- Cd doping δ-Bi₂O₃,
- 2D nanosheets,
- photocatalytic nitrogen fixation,
- doping defect
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Preparation and Photocatalytic Nitrogen Fixation Performance of Cd Doping δ-Bi₂O₃ Nanosheets