scholarly journals The Roll of NaPSS Surfactant on the Ceria Nanoparticles Embedding in Polypyrrole Films

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Simona Popescu ◽  
Mihaela Mîndroiu ◽  
Daniela Cabuzu ◽  
Cristian Pîrvu
Keyword(s):  
Cerium Oxide ◽  
Antibacterial Effect ◽  
Electrochemical Behaviour ◽  
Titanium Substrate ◽  
Crystalline Form ◽  
Polymeric Films ◽  
Ceria Nanoparticles ◽  
Polypyrrole Films ◽  
Polymerization Conditions

Cerium oxide nanoparticles (CeO2NPs) in crystalline form have been synthesized by a coprecipitation method. CeO2nanoparticles were then embedded in polypyrrole (PPy) films during the electropolymerization of pyrrole (Py) on titanium substrate. The influence of poly(sodium 4-styrenesulfonate) (NaPSS) surfactant used during polymerization on the embedding of CeO2NPs in polypyrrole films was investigated. The new films were characterized in terms of surface analysis, wettability, electrochemical behaviour, and antibacterial effect. The surface and electrochemical characterization revealed the role of surfactant on PPy doping process cerium oxide incorporation. In the presence of surfactant, CeO2NPs are preferentially embedded in the polymeric film while, without surfactant, the ceria nanoparticles are quasiuniformly spread as agglomerates onto polymeric films. The antibacterial effect of studied PPy films was substantially improved in the presence of cerium oxide and depends by the polymerization conditions.

Electrochemical behaviour of chromium–graphene composite coating

RSC Advances ◽  
2016 ◽  
Vol 6 (67) ◽  
pp. 62083-62090 ◽  
Author(s):  
Rekha M. Y. ◽  
M. K. Punith Kumar ◽  
Chandan Srivastava
Keyword(s):  
Composite Coating ◽  
Zno Nanoparticles ◽  
Electrochemical Behaviour ◽  
Chromium Coating ◽  
Corrosion Resistant ◽  
Graphene Composite ◽  
Pure Chromium

This work illustrates the role of graphene in enhancing the corrosion resistant properties of chromium–graphene composite coating when compared to the corrosion resistant properties of pure chromium coating containing ZnO nanoparticles.

The role of halide ions on the electrochemical behaviour of iron in alkali solutions

2008 ◽  
Vol 254 (8) ◽  
pp. 2325-2330
Author(s):  
S. Nathira Begum ◽  
V.S. Muralidharan ◽  
C. Ahmed Basha
Keyword(s):  
Electrochemical Behaviour ◽  
Halide Ions ◽  
Alkali Solutions

scholarly journals Will the Bacteria Survive in the CeO2 Nanozyme-H2O2 System?

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3747
Author(s):  
Weisheng Zhu ◽  
Luyao Wang ◽  
Qisi Li ◽  
Lizhi Jiao ◽  
Xiaokan Yu ◽  
...  
Keyword(s):  
Peroxidase Activity ◽  
Biomedical Applications ◽  
Antibacterial Effect ◽  
Ros Production ◽  
Ros Scavenging ◽  
Ros Scavenger ◽  
Oxide Nanoparticle ◽  
H2o2 System ◽  
Bacterial Disinfection

As one of the nanostructures with enzyme-like activity, nanozymes have recently attracted extensive attention for their biomedical applications, especially for bacterial disinfection treatment. Nanozymes with high peroxidase activity are considered to be excellent candidates for building bacterial disinfection systems (nanozyme-H2O2), in which the nanozyme will promote the generation of ROS to kill bacteria based on the decomposition of H2O2. According to this criterion, a cerium oxide nanoparticle (Nanoceria, CeO2, a classical nanozyme with high peroxidase activity)-based nanozyme-H2O2 system would be very efficient for bacterial disinfection. However, CeO2 is a nanozyme with multiple enzyme-like activities. In addition to high peroxidase activity, CeO2 nanozymes also possess high superoxide dismutase activity and antioxidant activity, which can act as a ROS scavenger. Considering the fact that CeO2 nanozymes have both the activity to promote ROS production and the opposite activity for ROS scavenging, it is worth exploring which activity will play the dominating role in the CeO2-H2O2 system, as well as whether it will protect bacteria or produce an antibacterial effect. In this work, we focused on this discussion to unveil the role of CeO2 in the CeO2-H2O2 system, so that it can provide valuable knowledge for the design of a nanozyme-H2O2-based antibacterial system.

The important role of surface area in the electrochemical behaviour of RuO2 electrodes

1977 ◽  
Vol 81 (2) ◽  
pp. 391-394 ◽  
Author(s):  
Laurence D. Burke ◽  
Oliver J. Murphy ◽  
John F. O'Neill
Keyword(s):  
Surface Area ◽  
Electrochemical Behaviour

Diamond growth on thin Ti wafers via chemical vapor deposition

1995 ◽  
Vol 10 (11) ◽  
pp. 2685-2688 ◽  
Author(s):  
Qijin Chen ◽  
Zhangda Lin
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Titanium Substrate ◽  
Chemical Vapor ◽  
Low Pressure ◽  
Diamond Growth ◽  
X Ray ◽  
Hot Filament ◽  
Insight Into

Diamond film was synthesized on thin Ti wafers (as thin as 40 μm) via hot filament chemical vapor deposition (HFCVD). The hydrogen embrittlement of the titanium substrate and the formation of a thick TiC interlayer were suppressed. A very low pressure (133 Pa) was employed to achieve high-density rapid nucleation and thus to suppress the formation of TiC. Oxygen was added to source gases to lower the growth temperature and therefore to slow down the hydrogenation of the thin Ti substrate. The role of the very low pressure during nucleation is discussed, providing insight into the nucleation mechanism of diamond on a titanium substrate. The as-grown diamond films were characterized by scanning electron microscopy (SEM), Raman spectroscopy, and x-ray analysis.

scholarly journals Role of trivalent La and Nd dopants in lattice distortion and oxygen vacancy generation in cerium oxide nanoparticles

2006 ◽  
Vol 88 (24) ◽  
pp. 243110 ◽  
Author(s):  
Swanand Patil ◽  
Sudipta Seal ◽  
Yu Guo ◽  
Alfons Schulte ◽  
John Norwood
Keyword(s):  
Oxygen Vacancy ◽  
Cerium Oxide ◽  
Lattice Distortion ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Vacancy Generation
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