Lanthanum Hydroxide Nanoparticles/Multi-Wall Carbon Nanotubes Nanocomposites

Arvind Kumar Bhakta, Sunita Kumari, Sahid Hussain, Ronald J. Mascarenhas, Praveen Martis, Joseph Delhalle, Zineb Mekhalif

Research output: Contribution in Book/Catalog/Report/Conference proceedingChapter


A simple and effective approach using infrared (IR) irradiation and diazonium chemistry has been applied to decorate multi-wall carbon nanotubes (MWCNTs) with lanthanum hydroxide nanoparticles (LaH NPs). The decoration process comprised four steps: purification, functionalization, impregnation and calcination. The resulting materials were characterized with XPS, TEM, PXRD, EDX and Raman spectroscopy. Sodium hydroxide treatment led to the purification of MWCNTs (p-MWCNTs). Functionalizing purified MWCNTs with in situ generated tricarboxylic aryl diazonium salts (p-MWCNTs-D3) followed by impregnation using IR irradiation was the key step in efficiently impregnating p-MWCNTs-D3 with lanthanum nitrate (p-MWCNTs-D3/LaN). Calcination of p-MWCNTs-D3/LaN at 500 °C under argon atmosphere resulted in homogeneously distributed LaH NPs on MWCNTs (p-MWCNTs/LaH) in the size range of 1.5–6.0 nm, with a Gaussian mean diameter of 3.0 nm. LaH nanoparticles were found to be amorphous. This method is applicable to large-scale production, which opens interesting outlooks for nanotechnology applications such as energy storage material and sensor for detection of chemical warfare agents in the defense sector.

Original languageEnglish
Title of host publicationAdvanced Materials for Defense
Subtitle of host publicationDevelopment, Analysis and Applications
EditorsRaul Fangueiro, Sohel Rana
Number of pages10
ISBN (Electronic)978-3-030-34123-7
ISBN (Print)978-3-030-34122-0
Publication statusPublished - Jan 2020
Event1st World Conference on Advanced Materials for Defense - São Julião da Barra Fort, Lisbon, Portugal
Duration: 3 Sept 20184 Sept 2018

Publication series

NameSpringer Proceedings in Materials
ISSN (Print)2662-3161
ISSN (Electronic)2662-317X


Conference1st World Conference on Advanced Materials for Defense
Abbreviated titleAUXDEFENSE2018
Internet address


  • Decoration
  • Diazonium chemistry
  • Infrared irradiation
  • Lanthanum hydroxide nanoparticles
  • Lanthanum nitrate
  • Multi-wall carbon nanotubes


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