A facile electrostatic droplets assisted synthesis of copper nanoparticles embedded magnetic carbon microspheres for highly effective catalytic reduction of 4-nitrophenol and Rhodamine B

2020 ◽  
Vol 253 ◽  
pp. 123444
Author(s):  
Peng Xu ◽  
Changli Cen ◽  
Mengke Zheng ◽  
Yang Wang ◽  
Zhenguo Wu ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Rhodamine B ◽  
Catalytic Reduction ◽  
Carbon Microspheres ◽  
Highly Effective ◽  
Magnetic Carbon

scholarly journals Poly(N-isopropylacrylamide-co-methacrylic acid) microgel stabilized copper nanoparticles for catalytic reduction of nitrobenzene

2015 ◽  
Vol 33 (3) ◽  
pp. 627-634 ◽  
Author(s):  
Zahoor H. Farooqi ◽  
Zonarah Butt ◽  
Robina Begum ◽  
Shanza Rhauf Khan ◽  
Ahsan Sharif ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Methacrylic Acid ◽  
Catalytic Reduction ◽  
Aqueous Media ◽  
Activation Parameters ◽  
Reducing Agent ◽  
Different Temperatures ◽  
Entropy Of Activation ◽  
Micro Reactors

Abstract Poly(N-isopropylacrylamide-co-methacrylic acid) microgels [p(NIPAM-co-MAAc)] were synthesized by precipitation polymerization of N-isopropylacrylamide and methacrylic acid in aqueous medium. These microgels were characterized by dynamic light scattering and Fourier transform infrared spectroscopy. These microgels were used as micro-reactors for in situ synthesis of copper nanoparticles using sodium borohydride (NaBH4) as reducing agent. The hybrid microgels were used as catalysts for the reduction of nitrobenzene in aqueous media. The reaction was performed with different concentrations of cat­alyst and reducing agent. A linear relationship was found between apparent rate constant (kapp) and amount of catalyst. When the amount of catalyst was increased from 0.13 to 0.76 mg/mL then kapp was increased from 0.03 to 0.14 min-1. Activation parameters were also determined by performing reaction at two different temperatures. The catalytic process has been discussed in terms of energy of activation, enthalpy of activation and entropy of activation. The synthesized particles were found to be stable even after 14 weeks and showed catalytic activity for the reduction of nitrobenzene.

Catalytic Reduction of p-Nitrophenol Using Chitosan Stabilized Copper Nanoparticles

2015 ◽  
Vol 145 (8) ◽  
pp. 1626-1633 ◽  
Author(s):  
W. L. Tan ◽  
N. H. H. Abu Bakar ◽  
M. Abu Bakar
Keyword(s):  
Copper Nanoparticles ◽  
Catalytic Reduction

Orientation growth modulated magnetic-carbon microspheres toward broadband electromagnetic wave absorption

Carbon ◽  
2021 ◽  
Vol 172 ◽  
pp. 516-528
Author(s):  
Lei Wang ◽  
Xuefeng Yu ◽  
Mengqiu Huang ◽  
Wenbin You ◽  
Qingwen Zeng ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Carbon Microspheres ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Magnetic Carbon ◽  
Orientation Growth
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