The photocatalytic performance and structural characteristics of nickel cobalt ferrite nanocomposites after doping with bismuth
- Title
- The photocatalytic performance and structural characteristics of nickel cobalt ferrite nanocomposites after doping with bismuth
- Author
- 김기현
- Keywords
- Bi-doped photocatalyst; Photo-degradation; Azo dye; Water pollution
- Issue Date
- 2021-07
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Citation
- JOURNAL OF COLLOID AND INTERFACE SCIENCE, v. 594, Page. 902-913
- Abstract
- Here, a novel bismuth-doped nickel-cobalt ferrite (Ni0.5Co0.5Bi0.1Fe1.9O4) was synthesized using a sol-gel auto-combustion approach. The impact of bismuth substitution on the nickel-cobalt ferrite structural characteristics was investigated relative to the nickel-cobalt ferrite without bismuth substitution (Ni0.5Co0.5Fe2O4) based on diverse technical options (e.g., scanning electron microscopy-equipped with an energy dispersive X-ray spectrometer, X-ray diffraction, physisorption, and Fourier-transform infrared spectroscopy). Bismuth doping increased the surface area without affecting pore size. The X-ray diffraction pattern confirmed a nano-ferrite cubic spinel structure of the catalyst. Photodegradation of Congo red (CR) was tested using these nickel-cobalt ferrite catalysts under visible light across varying reaction parameters (e.g., pH, catalyst loading, dye concentration, and reaction time). The photo-degradation efficiency for CR in aqueous medium was the highest (98%) at pH 3 with 0.2 g catalyst loading in 100 mL under visible irradiation to reinforce the role of nanostructures as a potent photocatalyst (QY = 2.79 x 1 0-7 molecule photon-1). The kinetic reaction rate of Bi-doped spinel ferrite (3.5 mmol g-1 h-1) was1.25 times higher than those undoped materials. This study experimentally proved that the bismuth-doped nickel-cobalt ferrite photocatalyst is an effective option for removing industrial dyes. (c) 2021 Elsevier Inc. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S002197972100388X?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/176728
- ISSN
- 0021-9797;1095-7103
- DOI
- 10.1016/j.jcis.2021.03.094
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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