Green synthesis of Ce<sup>3+</sup> rich CeO<inf>2</inf> nanoparticles and its antimicrobial studies

K. Mohan Kumar, M. Mahendhiran, M. Casales Diaz, N. Hernandez-Como, A. Hernandez-Eligio, Gilberto Torres-Torres, S. Godavarthi, L. Martinez Gomez

Research output: Contribution to journalArticle

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Abstract

© 2017 Elsevier B.V. Cerium oxide nanoparticles (CeO2-np) with Ce3+ rich surfaces were synthesized by ecofriendly route using tannic acid. XRD and SAED patterns confirm the cubic structure of CeO2-np. A semi-quantitative XPS analysis revealed the presence of 34 % Ce3+ ions. Tannic acid not only mediates the CeO2-np synthesis, but also helps in reduction of surface states from Ce4+ to Ce3+. Oxygen vacancies were evidenced from XPS and photoluminescence studies. The synthesized nanoparticles showed good antimicrobial activity towards both gram positive (Bacillus subtilis) and gram negative (Escherichia coli) bacteria. The toxicity of CeO2-np towards tested bacteria is due to production of Reactive oxygen species (ROS). The presence of Ce3+ ions and rich surface oxygen vacancies may lead to excellent production of ROS and simultaneously causing cell wall damage. Present findings show that tannic acid assisted CeO2-np with obtained properties acts as good antibacterial agent.
Original languageAmerican English
Pages (from-to)15-19
Number of pages13
JournalMaterials Letters
DOIs
StatePublished - 1 Mar 2018

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Tannins
Oxygen vacancies
Nanoparticles
nanoparticles
Acids
Reactive Oxygen Species
Bacteria
oxygen
synthesis
X ray photoelectron spectroscopy
Ions
bacteria
acids
Bactericides
Oxygen
Surface states
Bacilli
Cerium
cerium oxides
Escherichia coli

Cite this

Kumar, K. M., Mahendhiran, M., Diaz, M. C., Hernandez-Como, N., Hernandez-Eligio, A., Torres-Torres, G., ... Gomez, L. M. (2018). Green synthesis of Ce<sup>3+</sup> rich CeO<inf>2</inf> nanoparticles and its antimicrobial studies. Materials Letters, 15-19. https://doi.org/10.1016/j.matlet.2017.11.097
Kumar, K. Mohan ; Mahendhiran, M. ; Diaz, M. Casales ; Hernandez-Como, N. ; Hernandez-Eligio, A. ; Torres-Torres, Gilberto ; Godavarthi, S. ; Gomez, L. Martinez. / Green synthesis of Ce<sup>3+</sup> rich CeO<inf>2</inf> nanoparticles and its antimicrobial studies. In: Materials Letters. 2018 ; pp. 15-19.
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Kumar, KM, Mahendhiran, M, Diaz, MC, Hernandez-Como, N, Hernandez-Eligio, A, Torres-Torres, G, Godavarthi, S & Gomez, LM 2018, 'Green synthesis of Ce<sup>3+</sup> rich CeO<inf>2</inf> nanoparticles and its antimicrobial studies', Materials Letters, pp. 15-19. https://doi.org/10.1016/j.matlet.2017.11.097

Green synthesis of Ce<sup>3+</sup> rich CeO<inf>2</inf> nanoparticles and its antimicrobial studies. / Kumar, K. Mohan; Mahendhiran, M.; Diaz, M. Casales; Hernandez-Como, N.; Hernandez-Eligio, A.; Torres-Torres, Gilberto; Godavarthi, S.; Gomez, L. Martinez.

In: Materials Letters, 01.03.2018, p. 15-19.

Research output: Contribution to journalArticle

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AU - Mahendhiran, M.

AU - Diaz, M. Casales

AU - Hernandez-Como, N.

AU - Hernandez-Eligio, A.

AU - Torres-Torres, Gilberto

AU - Godavarthi, S.

AU - Gomez, L. Martinez

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N2 - © 2017 Elsevier B.V. Cerium oxide nanoparticles (CeO2-np) with Ce3+ rich surfaces were synthesized by ecofriendly route using tannic acid. XRD and SAED patterns confirm the cubic structure of CeO2-np. A semi-quantitative XPS analysis revealed the presence of 34 % Ce3+ ions. Tannic acid not only mediates the CeO2-np synthesis, but also helps in reduction of surface states from Ce4+ to Ce3+. Oxygen vacancies were evidenced from XPS and photoluminescence studies. The synthesized nanoparticles showed good antimicrobial activity towards both gram positive (Bacillus subtilis) and gram negative (Escherichia coli) bacteria. The toxicity of CeO2-np towards tested bacteria is due to production of Reactive oxygen species (ROS). The presence of Ce3+ ions and rich surface oxygen vacancies may lead to excellent production of ROS and simultaneously causing cell wall damage. Present findings show that tannic acid assisted CeO2-np with obtained properties acts as good antibacterial agent.

AB - © 2017 Elsevier B.V. Cerium oxide nanoparticles (CeO2-np) with Ce3+ rich surfaces were synthesized by ecofriendly route using tannic acid. XRD and SAED patterns confirm the cubic structure of CeO2-np. A semi-quantitative XPS analysis revealed the presence of 34 % Ce3+ ions. Tannic acid not only mediates the CeO2-np synthesis, but also helps in reduction of surface states from Ce4+ to Ce3+. Oxygen vacancies were evidenced from XPS and photoluminescence studies. The synthesized nanoparticles showed good antimicrobial activity towards both gram positive (Bacillus subtilis) and gram negative (Escherichia coli) bacteria. The toxicity of CeO2-np towards tested bacteria is due to production of Reactive oxygen species (ROS). The presence of Ce3+ ions and rich surface oxygen vacancies may lead to excellent production of ROS and simultaneously causing cell wall damage. Present findings show that tannic acid assisted CeO2-np with obtained properties acts as good antibacterial agent.

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