Green synthesis of Ce3+ rich CeO2 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

doi:10.1016/j.matlet.2017.11.097

Green synthesis of Ce³⁺ rich CeO₂ 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

Centro de Nanociencias y Micro y Nanotecnologías (CNMN)

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

Abstract

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 language	English
Pages (from-to)	15-19
Number of pages	5
Journal	Materials Letters
Volume	214
DOIs	https://doi.org/10.1016/j.matlet.2017.11.097
State	Published - 1 Mar 2018

Keywords

Antibacterial
Cerium oxide
Oxygen vacancies
ROS
Tannic acid
Toxicity

Access to Document

10.1016/j.matlet.2017.11.097

Cite this

@article{6d8efe387cdb444e8e7c2afbcfa36155,

title = "Green synthesis of Ce3+ rich CeO2 nanoparticles and its antimicrobial studies",

abstract = "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.",

keywords = "Antibacterial, Cerium oxide, Oxygen vacancies, ROS, Tannic acid, Toxicity",

author = "Kumar, {K. Mohan} and M. Mahendhiran and Diaz, {M. Casales} and N. Hernandez-Como and A. Hernandez-Eligio and Gilberto Torres-Torres and S. Godavarthi and Gomez, {L. Martinez}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2018",

month = mar,

day = "1",

doi = "10.1016/j.matlet.2017.11.097",

language = "Ingl{\'e}s",

volume = "214",

pages = "15--19",

journal = "Materials Letters",

issn = "0167-577X",

}

TY - JOUR

T1 - Green synthesis of Ce3+ rich CeO2 nanoparticles and its antimicrobial studies

AU - Kumar, K. Mohan

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

PY - 2018/3/1

Y1 - 2018/3/1

N2 - 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 - 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.

KW - Antibacterial

KW - Cerium oxide

KW - Oxygen vacancies

KW - ROS

KW - Tannic acid

KW - Toxicity

UR - http://www.scopus.com/inward/record.url?scp=85037160095&partnerID=8YFLogxK

U2 - 10.1016/j.matlet.2017.11.097

DO - 10.1016/j.matlet.2017.11.097

M3 - Artículo

SN - 0167-577X

VL - 214

SP - 15

EP - 19

JO - Materials Letters

JF - Materials Letters

ER -

Green synthesis of Ce³⁺ rich CeO₂ nanoparticles and its antimicrobial studies

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this