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A facile synthesis strategy to couple porous nanocubes of CeO2 with Ag nanoparticles: an excellent catalyst with enhanced reactivity for the ‘click reaction’ and carboxylation of terminal alkynes

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Abstract

Oleic acid and oleylamine capped 3-D porous CeO2 nanocubes were synthesized by the hot injection method. The surface of the nanocube was modified with 2,4-dimethylphenol (DMP). The reducing and capping abilities of DMP to form Ag nanoparticles were explored to form noble metal nanoparticles over the porous CeO2 nanocubes support at room temperature. The surface modification and formation of Ag nanoparticles over the CeO2 support were thoroughly characterized with FTIR, UV-Vis spectroscopy, XRD, XPS, TEM, HRTEM, STEM, EDX and chemical mapping. This CeO2–Ag nanocomposite was found to have enhanced catalytic activities in the ‘click reaction’ as compared to unsupported Ag nanoparticles and porous CeO2 nanocubes; it was also found to have optimized catalytic activity in the carboxylation of terminal alkynes when Cs2CO3 was used as the base in DMF solvent at 80 °C. The reaction can give the desired product in yields as high as 98% under several experimental conditions via the green pathway. Recycling data showed that the catalyst could be reused five times without considerable loss of its activity and without any deterioration of physical conditions as observed by various characterization methods like TEM, EDX, XRD and XPS.

Graphical abstract: A facile synthesis strategy to couple porous nanocubes of CeO2 with Ag nanoparticles: an excellent catalyst with enhanced reactivity for the ‘click reaction’ and carboxylation of terminal alkynes

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Publication details

The article was received on 07 Feb 2018, accepted on 31 Mar 2018 and first published on 04 Apr 2018


Article type: Paper
DOI: 10.1039/C8NJ00665B
Citation: New J. Chem., 2018, Advance Article
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    A facile synthesis strategy to couple porous nanocubes of CeO2 with Ag nanoparticles: an excellent catalyst with enhanced reactivity for the ‘click reaction’ and carboxylation of terminal alkynes

    S. Das, P. Mondal, S. Ghosh, B. Satpati, S. Deka, Sk. M. Islam and T. Bala, New J. Chem., 2018, Advance Article , DOI: 10.1039/C8NJ00665B

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