Copper nanoparticles decorated N-doped mesoporous carbon with bimodal pores for selective gas separation and energy storage applications

Kavitha Ramadass, Kripal S. Lakhi, C. I. Sathish, Ajanya M. Ruban, Rohan Bahadur, Gurwinder Singh, Harpreet S. Gujral, Mohammed Al-Abri, Ala'a H. Al-Muhtaseb, Ehsan Tavakkoli, Jiabao Yi, Ajay Karakoti*, Ajayan Vinu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We demonstrate a synthesis of copper nanoparticles decorated over nitrogen-doped mesoporous carbon with different N and Cu contents which exhibit conducting, redox, basic, adsorption, and excellent textural properties. These materials are prepared through a nanotemplating approach by simultaneously encapsulating sucrose, guanidine hydrochloride, and Cu(NO3)2 into the porous channels of mesoporous SBA-15 at a low carbonization temperature of 600 °C. The prepared materials exhibit an ordered mesoporous carbon framework with bimodal pores, decorated with nitrogen and Cu functionalities on the surface of the pores and in the wall structure. The presence of nitrogen functionalities in the porous carbon matrix not only helps to reduce the Cu ions but also stabilizes the nanoparticles and offers redox sites, which are beneficial for adsorption and electrochemical applications. The optimized sample exhibits the highest adsorption capacity of different gases such as CO2 – 22.5 mmol/g at 273 K, H2 −13.5 mmol/g at 77 K at 30 bar and CH4 − 5 mmol/g at 298 K and 50 bar. We also demonstrate that the prepared material shows a high selectivity of adsorption towards CO2 in a mixture of CO2/H2 and CO2/CH4 and it also registers a high supercapacitance of 209 F g−1 at a current density of 1 A g−1 with excellent cyclic stability.

Original languageEnglish
Article number134056
JournalChemical Engineering Journal
Volume431
DOIs
Publication statusPublished - Mar 1 2022
Externally publishedYes

Keywords

  • CO adsorption
  • Heteroatom doped mesoporous carbon
  • Hydrogen storage
  • Mesoporous carbon
  • Methane adsorption
  • Supercapacitors

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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