CIESC Journal ›› 2019, Vol. 70 ›› Issue (3): 1198-1207.doi: 10.11949/j.issn.0438-1157.20181233

• Material science and engineering, nanotechnology • Previous Articles     Next Articles

Synthesis of Fe3+-doped ZnO nanostructures by antisolvent precipitation method and their visible photocatalytic activity

Yunbiao DUAN1(),Cunying XU2,3(),Xiang WANG2,Hai LIU2,Mengting HUANG2   

  1. 1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
    2. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
    3. State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization, Kunming 650093, Yunnan, China
  • Received:2018-10-19 Revised:2018-12-05 Online:2019-03-05 Published:2018-12-12
  • Contact: Cunying XU;


Fe3+-doped ZnO (Fe-ZnO) nanostructures with different dopant concentrations were successfully synthesized by a simple antisolvent precipitation method from the choline chloride-oxalic acid deep eutectic solvent (ChCl-OA DES). The structure and morphology of the prepared Fe-ZnO were characterized by SEM, XRD, Raman spectroscopy and XPS. The as-prepared Fe3+-doped ZnO sample was micro-rods that were composed of nanoparticles with diameter of 20—30 nm. All of Fe3+-doped ZnO samples with various Fe3+-doping concentration were hexagonal wurtzite structure and the Fe3+ ions were well incorporated into the ZnO crystal lattice. In addition, the optical properties and photocatalytic activities of the samples were investigated based on ultraviolet-visible (UV-Vis) spectra analysis as well as the degradation of Rhodamine B in aqueous solution under visible light. Compared with ZnO catalysts, the threshold wavelength of Fe3+-doped ZnO nanostructure was shifted to the full visible light region (red shift) and their absorption in the visible region increased with increasing of Fe3+-doping concentration from 0 to 5.0%(atom). The content of iron ion was found to be significant to the photocatalytic efficiency of Fe-ZnO nanostructures. The results demonstrated that the most optimal Fe3+-doping concentration was 1.0% (atom), and its photocatalytic activity was increased by 102% compared with ZnO under visible light. The enhanced photoactivity of the Fe3+-doped ZnO nanostructure was mainly due to the improved visible photon harvesting achieved by Fe3+ doping.

Key words: deep eutectic solvent, antisolvent precipitation method, preparation, Fe-doped ZnO, nanostructure, catalysis

CLC Number: 

  • TQ 426.8


SEM images of ZnO nanocrystals with different Fe3+-doping concentrations"


TEM image and EDS spectraum of Fe-ZnO sample [1.0%(atom) Fe]"

Fig. 3

XRD patterns of Fe3+-doped ZnO nanocrystals with different Fe3+ concentrations"


Raman spectra of Fe3+-doped ZnO nanocrystals with different Fe3+ concentrations"


Narrow scan XPS spectrum of ZnO and Fe-ZnO"


XRD patterns of precipitate formed from ChCl-OA DES containing metal oxides by adding water"

Fig. 7

UV–Vis absorption spectra of Fe3+-doped ZnO nanocrystals with different Fe3+ concentrations"

Fig. 8

Photodegradability of RhB under visible light([RhB] = 10 mg/L, catalyst suspended = 3 g/L, pH = 9, T = 25℃)"

Table 1

Comparison of photocatalytic degradation of RhBbetween pure ZnO and different Fe3+ doping amount of Fe-ZnO"



Fe0.01Zn0.99O and ZnO for photodegradation of RhB under visible light( [RhB] = 10 mg/L, catalyst suspended = 3 g/L, pH = 9, T = 25℃)"

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LI Qingzhao;ZHAO Changsui;CHEN Xiaoping;WU Weifang;LI Yingjie


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