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; H. Luo

doi:10.1039/c7qi00819h

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

Journal article

Peer reviewed

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

Inorganic Chemistry Frontiers, Vol.5(3), pp.550-558

2018

DOI: https://doi.org/10.1039/c7qi00819h

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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.

Details

Title: VO2(D) hollow core–shell microspheres: synthesis, methylene blue dye adsorption and their transformation into C/VOx nanoparticles
Authors/Creators: L. Zhang (Author/Creator) - Shanghai University
J. Yao (Author/Creator) - Shanghai University
F. Xia (Author/Creator) - Murdoch University
Y. Guo (Author/Creator) - Shanghai University
C. Cao (Author/Creator) - Shanghai University
Z. Chen (Author/Creator) - Shanghai University
Y. Gao (Author/Creator) - Shanghai University
H. Luo (Author/Creator) - Shanghai University
Publication Details: Inorganic Chemistry Frontiers, Vol.5(3), pp.550-558
Publisher: Royal Society of Chemistry
Identifiers: 991005541397907891
Copyright: © 2018 Royal Society of Chemistry
Murdoch Affiliation: School of Engineering and Information Technology
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 2 Chemistry; 2.62 Electrochemistry; 2.62.1525 Vanadium Oxides
Web Of Science research areas: Chemistry, Inorganic & Nuclear
ESI research areas: Chemistry