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The Preparation of Phosphazene Crosslinked Cyclen Microspheres as Host for Cu2+ Ions and Their Utilization as a Support Material for the Preparation of a Copper Nanocatalyst
- Source :
- Journal of Inorganic and Organometallic Polymers and Materials. 27:122-130
- Publication Year :
- 2016
- Publisher :
- Springer Science and Business Media LLC, 2016.
-
Abstract
- In this study firstly, phosphazene crosslinked cyclen microspheres were synthesized. Then, supported copper nanoparticles were prepared on these phosphazene crosslinked cyclen microspheres for use as a metal catalyst. The prepared microparticles and microparticle-supported metal catalyst were characterized using FT-IR, SEM-EDX, TEM and XPS analysis. Also, the prepared metal composite was used as a catalyst for the reduction reaction of 4-nitrophenol in the presence of NaBH4 in aqueous media. The catalytic activity of the Cu-cyclen composite catalyst was investigated using UV–Vis spectroscopy. The reduction studies were completed at four different temperatures (30–60 °C). The activation parameters were calculated from the obtained rate constants at the four different temperatures (30–60 °C). The activation energy, activation enthalpy and activation entropy for the reduction reaction of 4-NP in the presence of Cu-cyclen composite catalyst were calculated as 39.88, 36.56 and −143.30 kJmol−1, respectively. The total turnover frequency (TOF) for Cu-cyclen composite catalyst was 0.794 mol 4-NP (mol Cu)−1 (min)−1.
- Subjects :
- Materials science
Polymers and Plastics
Inorganic chemistry
Composite number
chemistry.chemical_element
Selective catalytic reduction
02 engineering and technology
Activation energy
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Copper
0104 chemical sciences
Catalysis
chemistry.chemical_compound
Reaction rate constant
Cyclen
chemistry
Materials Chemistry
0210 nano-technology
Phosphazene
Subjects
Details
- ISSN :
- 15741451 and 15741443
- Volume :
- 27
- Database :
- OpenAIRE
- Journal :
- Journal of Inorganic and Organometallic Polymers and Materials
- Accession number :
- edsair.doi...........a23fcb83c0624a33ada7bc08d09369b9