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Bhattacharjee A, Ahmaruzzaman M. A novel and green process for the production of tin oxide quantum dots and its application as a photocatalyst for the degradation of dyes from aqueous phase. J Colloid Interface Sci. 2015;448:130-9doi: 10.1016/j.jcis.2015.01.083.
Bhattacharjee, A., & Ahmaruzzaman, M. (2015). A novel and green process for the production of tin oxide quantum dots and its application as a photocatalyst for the degradation of dyes from aqueous phase. Journal of colloid and interface science, 448130-9. https://doi.org/10.1016/j.jcis.2015.01.083
Bhattacharjee, Archita, and Ahmaruzzaman, M. "A novel and green process for the production of tin oxide quantum dots and its application as a photocatalyst for the degradation of dyes from aqueous phase." Journal of colloid and interface science vol. 448 (2015): 130-9. doi: https://doi.org/10.1016/j.jcis.2015.01.083
Bhattacharjee A, Ahmaruzzaman M. A novel and green process for the production of tin oxide quantum dots and its application as a photocatalyst for the degradation of dyes from aqueous phase. J Colloid Interface Sci. 2015 Jun 15;448:130-9. doi: 10.1016/j.jcis.2015.01.083. Epub 2015 Feb 08. PMID: 25725397.
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J Colloid Interface Sci. 2015 Jun 15;448:130-9. doi: 10.1016/j.jcis.2015.01.083. Epub 2015 Feb 08.

A novel and green process for the production of tin oxide quantum dots and its application as a photocatalyst for the degradation of dyes from aqueous phase.

Journal of colloid and interface science

Archita Bhattacharjee, M Ahmaruzzaman

Affiliations

  1. Department of Chemistry, National Institute of Technology, Silchar 788010, Assam, India.
  2. Department of Chemistry, National Institute of Technology, Silchar 788010, Assam, India. Electronic address: [email protected].

PMID: 25725397 DOI: 10.1016/j.jcis.2015.01.083

Abstract

Green synthesis of SnO2 quantum dots (QDs) was developed by microwave heating method using the amino acids, namely, aspartic and glutamic acid. This method resulted in the formation of spherical SnO2 quantum dots with an average diameter less than the exciton Bohr radius of SnO2. The average diameter of SnO2 quantum dots formed using glutamic acid is ∼1.6 nm and is smaller than that formed using aspartic acid (∼2.6 nm). In the electronic spectra, a clear blue shift in the band gap energy from 4.33 to 4.4 eV is observed with a decrease in particle size (2.6-1.6 nm) due to three dimensional quantum confinement effects. The synthesized SnO2 QDs were characterized by transmission electron microscopy (TEM), selected area electron diffraction (SAED), X-ray diffraction (XRD) and Fourier transformed infrared spectroscopy (FT-IR). The optical properties were investigated using UV-visible spectroscopy. The synthesized SnO2 QDs act as an efficient photocatalyst in the degradation of Rose Bengal and Eosin Y dye under direct sunlight. For the first time, Rose Bengal dye was degraded using SnO2 QDs as a photocatalyst by solar irradiation.

Copyright © 2015 Elsevier Inc. All rights reserved.

Keywords: Aspartic acid; Glutamic acid; Photodegradation; SnO(2) QDs

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