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

被引：65

作者：

Kumar, K. Mohan ^{[1
]}

Mahendhiran, M. ^{[2
]}

Casales Diaz, M. ^{[1
]}

Hernandez-Como, N. ^{[3
]}

Hernandez-Eligio, A. ^{[4
]}

Torres-Torres, Gilberto ^{[5
]}

Godavarthi, S. ^{[6
]}

Martinez Gomez, L. ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, Inst Ciencias Fis, Cuernavaca 62210, Morelos, Mexico

[2] Univ Nacl Autonoma Mexico, Ctr Ciencias Genom, Cuernavaca 62210, Morelos, Mexico

[3] Inst Politecn Nacl, Ctr Nanociencias & Micro & Nanotecnol, Mexico City, DF, Mexico

[4] Univ Nacl Autonoma Mexico, Inst Biotechnol, CONACyT, Cuernavaca 62210, Morelos, Mexico

[5] Univ Juarez Autonoma Tabasco, CICTAT, Cunduacan 86690, Tabasco, Mexico

[6] Univ Juarez Autonoma Tabasco, CICTAT, CONACyT, Cunduacan 86690, Tabasco, Mexico

来源：

MATERIALS LETTERS | 2018年 / 214卷

关键词：

Cerium oxide; Tannic acid; Oxygen vacancies; Antibacterial; Toxicity; ROS; CERIUM OXIDE NANOPARTICLES; ANTIBACTERIAL PROPERTIES; OPTICAL-PROPERTIES; STATES;

D O I：

10.1016/j.matlet.2017.11.097

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：15 / 19

页数：5

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