Controlling the surface chemistry of cerium oxide nanoparticles for biological applications

2016 ◽  
Vol 4 (19) ◽  
pp. 3195-3202 ◽  
Author(s):  
Ankur Gupta ◽  
Soumen Das ◽  
Craig J. Neal ◽  
Sudipta Seal
Keyword(s):  
Surface Chemistry ◽  
Cerium Oxide ◽  
Room Temperature ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Biological Applications

Room temperature doping of cerium oxide nanoparticles to control the surface chemistry for enhanced biocatalytic activity is proposed.

scholarly journals Different approaches to synthesise cerium oxide nanoparticles and their corresponding physical characteristics, ROS scavenging and anti-inflammatory capabilities

2021 ◽  
Author(s):  
Yuao Wu ◽  
Hang Thu Ta
Keyword(s):  
Cerium Oxide ◽  
Physical Characteristics ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Biological Applications ◽  
Ros Scavenging ◽  
Trivalent Cerium ◽  
Anti Inflammatory ◽  
Tetravalent Cerium

The biological applications of cerium oxide nanoparticles (nanoceria) have received extensive attention in recent decades. The coexistence of trivalent cerium and tetravalent cerium on the surface of nanoceria allows the...

Co-effects of UV/H2O2 and natural organic matter on the surface chemistry of cerium oxide nanoparticles

2018 ◽  
Vol 5 (10) ◽  
pp. 2382-2393 ◽  
Author(s):  
Xuanhao Wu ◽  
Chelsea W. Neil ◽  
Doyoon Kim ◽  
Haesung Jung ◽  
Young-Shin Jun
Keyword(s):  
Organic Matter ◽  
Surface Chemistry ◽  
Cerium Oxide ◽  
Natural Organic Matter ◽  
Colloidal Stability ◽  
Chemical Properties ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Surface Chemical

This study delineates the co-effects of UV/H2O2 and NOM on the colloidal stability and surface chemical properties of CeO2 nanoparticles.

Polyacrylic Acid Modified Cerium Oxide Nanoparticles: Synthesis and Characterization as a Peroxidase Mimic for Non-Enzymatic H2O2 Sensor

2020 ◽  
Vol 16 (5) ◽  
pp. 816-828
Author(s):  
Gurdeep Rattu ◽  
Nishtha Khansili ◽  
Prayaga M. Krishna
Keyword(s):  
Hydrogen Peroxide ◽  
Cerium Oxide ◽  
Polyacrylic Acid ◽  
Spectroscopic Analysis ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Peroxidase Mimic ◽  
Ft Ir ◽  
H2o2 Sensing ◽  
Fluorescence Spectrometer

Background: Cerium oxide nanoparticles (nanoceria) are efficient free-radical scavengers due to their dual valence state and thus exhibit optical and catalytic properties. Therefore, the main purpose of this work was to understand the peroxidase mimic activity of polymer-stabilized nanoceria for enzyme-less H2O2 sensing by fluorescence spectrometer. Objective: This research revealed the development of fluorescence hydrogen peroxide nanosensor based on the peroxidase-like activity of polyacrylic acid stabilized nanoceria (PAA-CeO2 Nps). Methods: PAA-CeO2 Nps were synthesized by simple cross-linking reaction at a low temperature and characterized by XRD, SEM, Zeta potential, TGA, FT-IR and UV-VIS spectroscopic analysis. H2O2 sensing was performed by a fluorescence spectrometer. Results:: The synthesized polymer nanocomposite was characterized by XRD, SEM, TGA, FT-IR and UV-VIS spectroscopic analysis. The XRD diffraction patterns confirmed the polycrystalline nature and SEM micrograph showed nanoparticles having hexagonal symmetry and crystallite size of 32 nm. The broad peak of Ce–O bond appeared at 508 cm-1. UV-VIS measurements revealed a welldefined absorbance peak around 315 nm and an optical band-gap of 3.17 eV. As synthesized PAACeO2 Nps effectively catalysed the decomposition of hydrogen peroxide (H2O2) into hydroxyl radicals. Then terephthalic acid was oxidized by hydroxyl radical to form a highly fluorescent product. Under optimized conditions, the linear range for determination of hydrogen peroxide was 0.01 - 0.2 mM with a limit of detection (LOD) of 1.2 μM. Conclusion: The proposed method is ideally suited for the sensing of H2O2 at a low cost and this detection system enabled the sensing of analytes (sugars), which can enzymatically generate hydrogen peroxide.

Radiosensitizing Effect of Cerium Oxide Nanoparticles on Human Leukemia Cells

2018 ◽  
Vol 6 (2) ◽  
pp. 111-115 ◽  
Author(s):  
Azadeh Montazeri ◽  
Zohreh Zal ◽  
Arash Ghasemi ◽  
Hooman Yazdannejat ◽  
Hossein Asgarian-Omran ◽  
...  
Keyword(s):  
Cerium Oxide ◽  
Leukemia Cells ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Human Leukemia ◽  
Radiosensitizing Effect ◽  
Human Leukemia Cells

Cerium oxide nanoparticles acts as a novel therapeutic agent for ulcerative colitis through anti-oxidative mechanism

Life Sciences ◽  
2021 ◽  
pp. 119500
Author(s):  
Fereshteh Asgharzadeh ◽  
Alireza Hashemzadeh ◽  
Farzad Rahmani ◽  
Atieh Yaghoubi ◽  
Seyedeh Elnaz Nazari ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Cerium Oxide ◽  
Therapeutic Agent ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Novel Therapeutic
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