Jump to main content
Jump to site search

Issue 3, 2018
Previous Article Next Article

VO2(D) hollow core–shell microspheres: synthesis, methylene blue dye adsorption and their transformation into C/VOx nanoparticles

Author affiliations

Abstract

In this work, we report the fabrication of novel VO2(D) hollow core–shell microspheres (VO2(D)-HCSMs) via a facile hydrothermal method. Microscopic examination revealed that the VO2(D)-HCSMs consisted of numerous nanocrystals and had an average size of 1–10 μm and a shell thickness of 300 nm. An inside-out Ostwald ripening process was responsible for the formation of the VO2(D)-HCSMs. Meanwhile, citric acid played dual roles, acting as a reductant for reducing vanadium pentoxide and as a morphology directing agent for producing core–shell microspheres. The resulting VO2(D)-HCSMs exhibited excellent adsorption performance with a maximum adsorption capacity of 97.5 mg g−1 for methylene blue (MB). The C/VOx particles were generated by the calcination of the VO2(D)-HCSMs with adsorbed MB dye at 250 °C in air for 4 h, and the microspheres showed enhanced adsorption capacity and good reusability (over 99% MB removal after four cycles) because of the existence of amorphous carbon nanowires, making them a potential adsorbent for removing organic dyes from wastewater.

Graphical abstract: VO2(D) hollow core–shell microspheres: synthesis, methylene blue dye adsorption and their transformation into C/VOx nanoparticles

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Dec 2017, accepted on 01 Feb 2018 and first published on 01 Feb 2018


Article type: Research Article
DOI: 10.1039/C7QI00819H
Citation: Inorg. Chem. Front., 2018,5, 550-558
  •   Request permissions

    VO2(D) hollow core–shell microspheres: synthesis, methylene blue dye adsorption and their transformation into C/VOx nanoparticles

    L. Zhang, J. Yao, F. Xia, Y. Guo, C. Cao, Z. Chen, Y. Gao and H. Luo, Inorg. Chem. Front., 2018, 5, 550
    DOI: 10.1039/C7QI00819H

Search articles by author

Spotlight

Advertisements