In situ Stabilization of Au and Co Nanoparticles in a Redox-Active Conjugated Microporous Polymer Matrix: Facile Heterogeneous Catalysis and Electrocatalytic Oxygen Reduction Reaction Activity

2019 ◽  
Vol 11 (5) ◽  
pp. 5455-5461 ◽  
Author(s):  
Sohini Bhattacharyya ◽  
Debabrata Samanta ◽  
Syamantak Roy ◽  
Vishnu Priya Haveri Radhakantha ◽  
Tapas Kumar Maji
Keyword(s):  
Heterogeneous Catalysis ◽  
Reduction Reaction ◽  
Oxygen Reduction Reaction Activity ◽  
In Situ Stabilization ◽  
Conjugated Microporous Polymer ◽  
Redox Active ◽  
Microporous Polymer ◽  
Electrocatalytic Oxygen Reduction ◽  
Co Nanoparticles

In-situ stabilization of silver nanoparticles in polymer hydrogels for enhanced catalytic reduction of macro and micro pollutants

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Luqman Ali Shah ◽  
Rida Javed ◽  
Mohammad Siddiq ◽  
Iram BiBi ◽  
Ishrat Jamil ◽  
...  
Keyword(s):  
Catalytic Reduction ◽  
Thermo Gravimetric Analysis ◽  
Activation Parameters ◽  
Reduction Reaction ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
In Situ Stabilization ◽  
Hybrid Hydrogels ◽  
Kinetics Of

AbstractThe in-situ stabilization of Ag nanoparticles is carried out by the use of reducing agent and synthesized three different types of hydrogen (anionic, cationic, and neutral) template. The morphology, constitution and thermal stability of the synthesized pure and Ag-entrapped hybrid hydrogels were efficiently confirmed using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and thermo gravimetric analysis (TGA). The prepared hybrid hydrogels were used in the decolorization of methylene blue (MB) and azo dyes congo red (CR), methyl Orange (MO), and reduction of 4-nitrophenol (4-NP) and nitrobenzene (NB) by an electron donor NaBH4. The kinetics of the reduction reaction was also assessed to determine the activation parameters. The hybrid hydrogen catalysts were recovered by filtration and used continuously up to six times with 98% conversion of pollutants without substantial loss in catalytic activity. It was observed that these types of hydrogel systems can be used for the conversion of pollutants from waste water into useful products.

Biomass chitosan derived cobalt/nitrogen doped carbon nanotubes for the electrocatalytic oxygen reduction reaction

2018 ◽  
Vol 6 (14) ◽  
pp. 5740-5745 ◽  
Author(s):  
Yijie Zhang ◽  
Luhua Lu ◽  
Si Zhang ◽  
Zaozao Lv ◽  
Dantong Yang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Oxygen Reduction Reaction Activity ◽  
Nitrogen Doped ◽  
Electrocatalytic Oxygen Reduction ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites ◽  
Scalable Synthesis ◽  
Nitrogen Doped Carbon

Biomass chitosan was used for the scalable synthesis of cobalt/nitrogen doped carbon nanotube composites with impressive oxygen reduction reaction activity and stability.

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