2. Academic Validation
  3. Yeast-template synthesized Fe-doped cerium oxide hollow microspheres for visible photodegradation of acid orange 7

Yeast-template synthesized Fe-doped cerium oxide hollow microspheres for visible photodegradation of acid orange 7

  • J Colloid Interface Sci. 2018 Feb 1:511:39-47. doi: 10.1016/j.jcis.2017.09.077.
Baoqin Zhao 1,  Qian Shao 2,  Luhan Hao 3,  Li Zhang 4,  Zhen Liu 5,  Bing Zhang 1,  Shengsong Ge 1,  Zhanhu Guo 6
Affiliations

Affiliations

  • 1 College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China.
  • 2 College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China. Electronic address: shaoqian01@126.com.
  • 3 Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA.
  • 4 School of Environmental and Materials Engineering, Shanghai Second Polytechnic University, Shanghai 201209, PR China. Electronic address: zhangli@sspu.edu.cn.
  • 5 Department of Physics and Engineering, Frostburg State University, Frostburg, MD, USA.
  • 6 Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA. Electronic address: zguo10@utk.edu.
PMID: 28972894 DOI: 10.1016/j.jcis.2017.09.077
Abstract

Fe-doped cerium oxide (CeO2) hollow microspheres were successfully synthesized by a simple co-precipitation route using yeast asa bio-template and nitrate as the oxide precursor. The products were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, N2 adsorption-desorption isotherms and UV-Vis diffuse reflectance spectroscopy. It was found that the products had a well-defined ellipsoidal morphology and the size of the hollow microspheres was about 1.5-2.5μm. The formation mechanism of Fe-doped CeO2 hollow microspheres was proposed and discussed as well. The photocatalytic test results showed that the Fe-doped CeO2 hollow microspheres exhibited a higher photocatalytic activity in the degradation of acid orange 7 (AO7) aqueous solutions containing H2O2 under visible irradiation compared with CeO2 hollow microspheres and Fe-doped CeO2 nanoparticles, which was attributed to their more oxygen vacancies, higher specific surface area and lower band gap. The degradation rate of the Fe-doped CeO2 hollow microspheres was found to be 93% after 80min and the degradation reaction followed pseudo-first-order kinetics.

Keywords

Bio-template; Fe-doped CeO(2); Hollow microspheres; Photocatalytic activity.

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