CeO2 Nanoparticle Transformation to Nanorods and Nanoflowers in Acids with Boosted Oxidative Catalytic Activity

  • Yilin Zhao
    Yilin Zhao
    Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology (BUCT), 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, P. R. China
    Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
    More by Yilin Zhao
  • Haotian Li
    Haotian Li
    Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology (BUCT), 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, P. R. China
    More by Haotian Li
  • Yaoqiang Wang
    Yaoqiang Wang
    Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology (BUCT), 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, P. R. China
  • Yawen Wang
    Yawen Wang
    Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
    More by Yawen Wang
  • Zhicheng Huang
    Zhicheng Huang
    Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
  • Haijia Su*
    Haijia Su
    Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology (BUCT), 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, P. R. China
    *Email: [email protected]
    More by Haijia Su
  • , and 
  • Juewen Liu*
    Juewen Liu
    Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
    *Email: [email protected]
    More by Juewen Liu
Cite this: ACS Appl. Nano Mater. 2021, 4, 2, 2098–2107
Publication Date (Web):February 4, 2021
https://doi.org/10.1021/acsanm.0c03387
Copyright © 2021 American Chemical Society
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Abstract

Nanoceria (CeO2 nanoparticle) with oxidase-like catalytic activity has been used for a diverse range of analytical, environmental, and nanomedicine applications. In this work, the use of nanoceria for the oxidation of common chromogenic substrates was investigated at low pH, where its activity was greatly enhanced. In addition, the shape of the nanoparticles changed dramatically, yielding nanorods in the presence of adsorbed substrates at pH 1. This work provides an interesting method to synthesize CeO2 nanorods at room temperature. By slightly increasing the reaction temperature, CeO2 nanoflowers were further obtained. This change of shape also affected its catalytic activity, with the nanorods being the most active. The physical and chemical properties of the nanoceria materials were characterized by various spectroscopic, microscopic, and electrochemical techniques. The increased activity at low pH was due to the promoted release of the oxidation product, as well as increased oxygen vacancy concentration and enhanced electron transfer. This work has deepened our understanding of nanoceria as a catalyst, enhanced its catalytic activity, and provided a useful way of controlling its morphology.

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The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsanm.0c03387.

  • Solubility and stability test of CeO2 NPs, SEM images of CeO2 NPs incubated in pH 1.0 and pH 4.0 for 24 h, XRD and EDS spectra of CeO2 nanorods, the UV–Vis spectra of the supernatant of rhodamine B oxidation by CeO2, the effect of substrate concentration and reaction time, fluoride (F)-inhibited nanorod formation, HRTEM micrographs of CeO2 nanorods and nanoflowers, N2 adsorption/desorption isotherms, steady-state kinetic assays of ABTS of CeO2 nanorods and nanoparticles at pH 1, the temperature stability test of CeO2 nanorods and nanoparticles, ζ-potential of CeO2 nanoparticles as a function of pH, and electrochemistry of CeO2 NPs (PDF)

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Cited By


This article is cited by 3 publications.

  1. Jinyi Zhang, Jie Wang, Jing Liao, Yao Lin, Chengbin Zheng, Juewen Liu. In Situ Fabrication of Nanoceria with Oxidase-like Activity at Neutral pH: Mechanism and Boosted Bio-Nanozyme Cascades. ACS Applied Materials & Interfaces 2021, 13 (42) , 50236-50245. https://doi.org/10.1021/acsami.1c14831
  2. Hanna Lewandowska, Karolina Wójciuk, Urszula Karczmarczyk. Metal Nanozymes: New Horizons in Cellular Homeostasis Regulation. Applied Sciences 2021, 11 (19) , 9019. https://doi.org/10.3390/app11199019
  3. Weisheng Zhu, Luyao Wang, Qisi Li, Lizhi Jiao, Xiaokan Yu, Xiangfan Gao, Hao Qiu, Zhijun Zhang, Wei Bing. Will the Bacteria Survive in the CeO2 Nanozyme-H2O2 System?. Molecules 2021, 26 (12) , 3747. https://doi.org/10.3390/molecules26123747