Design of Hierarchically Structured Porous Boron/Nitrogen-Codoped Carbon Materials with Excellent Performance for CO₂ Capture

Abstract

Environmental problems caused by excessive carbon dioxide emissions demand more than attention but realistic plans and specific actions as well. The development of materials with an efficient CO 2 adsorption performance is significant. In this paper, boric acid and ethylenediamine are used as boron and nitrogen sources, respectively, without using a hard/soft template, and a simple hydrothermal carbonization method is used to synthesize hierarchical porous carbon materials double-doped with boron and nitrogen. The cooperative effect between the doped elements and the well-developed porous structure leads to the excellent CO 2 capture ability of the prepared adsorbent. Notably, the material also exhibits impressive cyclic stability, revealing the feasibility of its use in practical applications.

Understanding the Adsorption Capacity for CO2 in Reduced Graphene Oxide (rGO) and Modified Ones with Different Heteroatoms in Relation to Surface and Textural Characteristics

“…In terms of porosity, it is found that micropores also help in the CO 2 adsorption [46,47], as well as in the tiny mesopores and the specific area of the micropores [49]. Furthermore, it can be beneficial the reduction the SA and increase the CO 2 capacity even with the addition of heteroatoms [49]. In this case, the uniform distribution of the heteroatoms and the synergetic effect among different heteroatoms are beneficial for the gas's adsorption [49].…”

“…The incorporation of S [46] or N [47,48] shows a beneficial result. In terms of porosity, it is found that micropores also help in the CO 2 adsorption [46,47], as well as in the tiny mesopores and the specific area of the micropores [49]. Furthermore, it can be beneficial the reduction the SA and increase the CO 2 capacity even with the addition of heteroatoms [49].…”

“…(25 • C: TMOS > TMON > TMOSN, 1.03 mmol/g-0.81 mmol/g-0.65 mmol/g and 60 • C: TMOS > TMON > TMOSN, 0.57 mmol/g-0.49 mmol/g-0.41 mmol/g). In general, the different doping of rGO materials can lead to differentiation of the CO 2 adsorption and towards enhanced ones [46][47][48][49].…”

“…Furthermore, it can be beneficial the reduction the SA and increase the CO 2 capacity even with the addition of heteroatoms [49]. In this case, the uniform distribution of the heteroatoms and the synergetic effect among different heteroatoms are beneficial for the gas's adsorption [49]. The addition of heteroatoms may reduce the SA due to change in the synthetic procedure during the preparation of the material that could also hinder the formation of micropores [49].…”

“…In this case, the uniform distribution of the heteroatoms and the synergetic effect among different heteroatoms are beneficial for the gas's adsorption [49]. The addition of heteroatoms may reduce the SA due to change in the synthetic procedure during the preparation of the material that could also hinder the formation of micropores [49]. Nevertheless, that does not mean that CO 2 is governed only from one or two parameters (micropores or doping or SA), but it has to be noted that it is a more complex procedure.…”