Journal of Materials Science

, Volume 51, Issue 23, pp 10632–10640 | Cite as

Functionalized stellate macroporous silica nanospheres for CO2 mitigation

  • Daniela R. Radu
  • Nicholas A. Pizzi
  • Cheng-Yu Lai
Original Paper


Carbon capture represents an integral part of the CO2 mitigation efforts, and involves the demonstration of effective and inexpensive CO2 capture technologies. We report the first demonstration of an amine-functionalized stellate macroporous silica as a platform for effective CO2 absorption, with potential application in current fossil-fuel burning plants. The work demonstrates that the facile impregnation of the silica platform with tetraethylenepentamine results in a high-performing sorbent for carbon dioxide. The CO2 absorption data exceed the performance of other reported silica–amine matrices for carbon capture, showing an amount of over 4 mmol CO2/g sorbent at low temperature, simulating the flue gas temperature. The platform is robust, showing recyclability and >85 % mass conservation of sorbent upon nine cycles. In addition, the stellate MSNs show high CO2 selectivity at room temperature, indicating that the presence of nitrogen in flue gas will not impair the CO2 absorption performance. The results could lead to a simple and inexpensive new technology for CO2 mitigation.


Tepa Silica Nanospheres Tetraethylenepentamine Ammonium Carbamate Oxyfuel Combustion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors thank the U.S. Department of Energy for funding through grant number DE-FE0023541, and U.S. National Science Foundation under Grant No. 1458980 (N. Pizzi graduate stipend).

Compliance with ethical standards

Conflict of interest

The authors do not have competing interest and declare no conflict of interest.

Supplementary material

10853_2016_284_MOESM1_ESM.docx (4.8 mb)
Supplementary material 1 (DOCX 4888 kb)


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Daniela R. Radu
    • 1
    • 2
  • Nicholas A. Pizzi
    • 1
  • Cheng-Yu Lai
    • 1
  1. 1.Department of ChemistryDelaware State UniversityDoverUSA
  2. 2.Department of Materials Science and EngineeringUniversity of DelawareNewarkUSA

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