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Indium oxide (In2O3) nanoparticles using Aloe vera plant extract: Synthesis and optical properties

S. MAENSIRI1,2,* , P. LAOKUL1, J. KLINKAEWNARONG1, S. PHOKHA1, V.PROMARAK3, S. SERAPHIN4

Affiliation

  1. Small & Strong materials Group (SSMG), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
  2. Integrated Nanotechnology Research Center (INRC), Khon Kaen University, Khon Kaen, 40002, Thailand
  3. Advanced Organic Materials and Devices Laboratory, Department of Chemistry, Faculty of Science, Ubon Ratchathani University, Varinchamrap, Ubon Ratchathani 34190, Thailand
  4. Department of Materials Science and Engineering, The University of Arizona, Tucson, Arizona 85721, USA

Abstract

In2O3 nanoparticles with particle sizes of 5-50 nm were synthesized by a simple, cost effective and environmental friendly route using indium acetylacetonate and Aloe vera plant extracted solution. The precursor was characterized by TG-DTA to determine the thermal decomposition and crystallization temperature which was found to be at above 350 °C. Nanoparticles are formed after calcination the dried precursor of In2O3 in air at 400-600°C for 2 h. Structural, morphological and optical properties of the synthesized nanoparticles were characterized. XRD and TEM analysis showed that the In2O3 samples are cubic with particle sizes of 5-50 nm. The morphology and size of In2O3 materials were affected by the calcination temperature. The prepared In2O3 nanoparticles showed a strong PL emission in the UV region. The strong emissions of In2O3 are attributed to the radioactive recombination of an electron occupying oxygen vacancies with a photo-excited hole. The present work proves that the Aloe vera plant-extracted solution synthesis is a new useful method using cheap precursors for preparation of In2O3 nanoparticles.

Keywords

Indium oxide, Nanoparticles, Synthesis, Electron microscopy, Photoluminescence.

Citation

S. MAENSIRI, P. LAOKUL, J. KLINKAEWNARONG, S. PHOKHA, V.PROMARAK, S. SERAPHIN, Indium oxide (In2O3) nanoparticles using Aloe vera plant extract: Synthesis and optical properties, Optoelectronics and Advanced Materials - Rapid Communications, 2, 3, March 2008, pp.161-165 (2008).

Submitted at: Feb. 1, 2008

Accepted at: March 16, 2008