Abstract
Activated carbon-supported copper(II) oxide (CuO) nanoparticles were synthesized by simple impregnation method to improve carbon dioxide (CO2) adsorption capacity of the support. The structural and chemical properties of the hybrid material were characterized by scanning electron microscopy (SEM), energy dispersive X-ray (EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), atomic absorption spectroscopy (AAS), and Brunauer-Emmett-Teller (BET) analyses. The analyses showed that CuO nanoparticles are well-distributed on the activated carbon surface. The CO2 adsorption behavior of the activated carbon-supported CuO nanoparticles was observed by thermogravimetric analysis (TGA), temperature programmed desorption (TPD), Fourier transform infrared (FTIR), and BET analyses. The results showed that CuO nanoparticle loading on activated carbon led to about 70% increase in CO2 adsorption capacity of activated carbon under standard conditions (1 atm and 298 K). The main contributor to the observed increase is an improvement in chemical adsorption of CO2 due to the presence of CuO nanoparticles on activated carbon.
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Acknowledgements
We acknowledge Assoc. Prof. Okan Esenturk for guidance in FTIR measurements, Prof. Jale Hacaloglu and Esra Özdemir for access to TGA instrument and help on TPD measurements, and Prof. Aysen Yilmaz for access to XRD instrument in METU Department of Chemistry. We acknowledge Ferdi Karadas and Satya Vijaya Kumar for help on the CO2 adsorption measurements in Bilkent University Department of Chemistry. We also acknowledge the support from METU-BAP Project: BAP-07-02-2014-007-442.
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SEM, back scattered SEM images and EDX spectrum of CuO-AC system, AC and single CuO NP on AC, survey and C1s XPS spectrum of CuO-AC system, BET graphs and N2 adsorption isotherms, table showing amounts of CO2 adsorbed on bare AC and CuO-AC system, regeneration data of CuO-AC system and brief explanation on quantitative analysis of CO2 adsorption by FTIR analysis. (DOCX 2883 kb)
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Boruban, C., Esenturk, E.N. Activated carbon-supported CuO nanoparticles: a hybrid material for carbon dioxide adsorption. J Nanopart Res 20, 59 (2018). https://doi.org/10.1007/s11051-018-4139-0
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DOI: https://doi.org/10.1007/s11051-018-4139-0