An Innovative Synthesis of Spinel-Structured and Ferromagnetic Behaviour of Fe3O4 Nanoparticles Antibacterial and Catalytic Activity Evaluated in the Selective Oxidation

2020 ◽  
Vol 18 (3) ◽  
pp. 236-240
Author(s):  
S. Ambika ◽  
K. Saravanan

Nanocrystalline Fe3O4 powder was produced via the organic combustion route using L-arginine for the first time as fuel. The prepared yields is considered through several investigates, such as, DRS, PL, XRD, SEM, TEM, EDS, and VSM. The current study existence limited only toward the antimicrobial activity that the limit Fe3O4. The influences for catalytic performances were explained in factor, while the samples characterization was presented.

2020 ◽  
Vol 8 (17) ◽  
pp. 8548-8553 ◽  
Author(s):  
Rui Ma ◽  
Naifang Liu ◽  
Ting-Ting Lin ◽  
Tianbo Zhao ◽  
Sheng-Li Huang ◽  
...  

Anderson polyoxometalate-based covalent organic frameworks exhibited the highest catalytic activity in the photodegradation of RhB and MB, as well as 100% selective oxidation of sulfides to sulfoxides.


RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22515-22521
Author(s):  
Xuanyao Li ◽  
Peihe Li ◽  
Jinghai Liu ◽  
Zhengguo Lin ◽  
Changwen Hu

Two copper(ii)-containing tungstotellurates(vi) were synthesized and present very high catalytic activity for the selective oxidation of thioethers under ambient conditions.


2019 ◽  
Vol 9 (9) ◽  
pp. 2328-2334 ◽  
Author(s):  
Miguel Tinoco ◽  
Susana Fernandez-Garcia ◽  
Alberto Villa ◽  
Juan M. Gonzalez ◽  
Ginesa Blanco ◽  
...  

It is reported, for the first time, that morphology controlled ceria without any addition of other metal exhibits catalytic activity for selective oxidation of glycerol. Moreover, development of {111} nanofacets plays an important role in both activity and selectivity.


Author(s):  
Daniele Tognetto ◽  
Marco R. Pastore ◽  
Gian Marco Guerin ◽  
Giuliana Decorti ◽  
Martina Franzin ◽  
...  

Abstract Purpose In the era of antibiotic resistance, there is an increased interest in antiseptic solutions that might represent a reliable option for ocular surface disinfection. The objective of this study is to compare for the first time three different antiseptic ophthalmic preparations to assess their in vitro antimicrobial activity. Methods The antiseptic activity of three commercial ophthalmic solutions, IODIM (povidone-iodine 0.6% in hyaluronic acid vehicle—Medivis, Catania, Italy), OZODROP (nanoemulsion with ozonated oil—concentration not specified—FBVision, Ophthalmic Pharmaceuticals, Rome, Italy), and DROPSEPT (chlorhexidine 0.02% and vitamin E 0.5% Tocopherol Polyethylene Glycol 1000 Succinate—TPGS, Sooft Italia, Montegiorgio, Italy), was tested in vitro on six reference strains by time-killing assays. Viable cells were evaluated after 1, 15, 30 min; 2, 6, and 24 h exposure by seeding 100 µl of the suspension (or appropriate dilutions) on LB agar or Sabouraud-dextrose agar. All plates were incubated at 37 °C for 24 h and evaluated by manually counting the colonies. Results IODIM solution showed a very rapid microbicidal activity: the number of viable cells for all the tested strains was under the detection limit (less than 10 CFU/ml) already after 1 min exposure, and this result was maintained at every incubation time. The rapid antimicrobial activity of povidone-iodine was not replicated when testing the other two antiseptics. Conclusions The study reports the great efficacy in reducing bacterial load in a very short time of povidone-iodine 0.6% compared with other antiseptic preparations.


2019 ◽  
Vol 21 (40) ◽  
pp. 22598-22610 ◽  
Author(s):  
Nan Zhang ◽  
Fuyi Chen ◽  
Longfei Guo

We demonstrate for the first time that the Pd1Ag single-atom alloys exhibit a high catalytic activity for formate oxidation reaction.


2019 ◽  
Vol 374 ◽  
pp. 793-801 ◽  
Author(s):  
Xiaoxiao Zheng ◽  
Linyan Zhang ◽  
Zhangjia Fan ◽  
Yanning Cao ◽  
Lijuan Shen ◽  
...  

2015 ◽  
Vol 39 (6) ◽  
pp. 4924-4932 ◽  
Author(s):  
Shiwei Xiao ◽  
Chuntao Zhang ◽  
Rong Chen ◽  
Fengxi Chen

The enhancing effect of modification by epichlorohydrin on the catalytic activity of Fe3O4 microspheres in the title reaction was theoretically and experimentally confirmed.


2017 ◽  
Vol 727 ◽  
pp. 1338-1343 ◽  
Author(s):  
Imran Khan ◽  
Anish Khan ◽  
Shakeel Khan ◽  
Mohd Arsalan ◽  
R.K. Kotnala ◽  
...  

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