Abstract
Porous boron nitride is a new class of solid adsorbent with applications in CO2 capture. In order to further enhance the adsorption capacities of materials, new strategies such as porosity tuning, element doping and surface modification have been taken into account. In this work, metal-free modification of porous boron nitride (BN) has been prepared by a structure directing agent via simple heat treatment under N2 flow. We have demonstrated that textural properties of BN play a pivotal role in CO2 adsorption behavior. Therefore, addition of a triblock copolymer surfactant (P123) has been adopted to improve the pore ordering and textural properties of porous BN and its influence on the morphological and structural properties of pristine BN has been characterized. The obtained BN-P123 exhibits a high surface area of 476 m2/g, a large pore volume of 0.83 cm3/g with an abundance of micropores. More importantly, after modification with P123 copolymer, the capacity of pure CO2 on porous BN has improved by about 34.5% compared to pristine BN (2.69 mmol/g for BN-P123 vs. 2.00 mmol/g for pristine BN under ambient condition). The unique characteristics of boron nitride opens up new routes for designing porous BN, which could be employed for optimizing CO2 adsorption.
Highlights
Over the last decades, climate change has become a global challenge for countries across the world [1]
Carbon capture and storage (CCS) is expected to play a substantial role in meeting the global warming targets set by the Inter-governmental Panel on Climate Change (IPCC) [2]
The synthesized boron nitride (BN)-P123 possesses high specific surface area and pore volume compared to pristine BN, which results in an enhanced CO2 adsorption capacity
Summary
Climate change has become a global challenge for countries across the world [1]. One of the challenges in this area relates to the manufacturing of new adsorbents that enables enhancing good diffusion kinetics and providing improved performance [10] In this regards, porous materials with high porosity, chemical and thermal stability are promising solid adsorbents for capturing CO2 [11,12]. Yang et al [26] developed a three dimensional (3D) functionalized porous BN with flower-like morphology and high specific surface area ≈114 m2 /g, and it shows 1.69 mmol/g CO2 capture capacity at 1 bar and 273 K. Porous structure and surface chemistry features of BN-based materials play crucial roles in CO2 adsorption performance and it remains a challenge to control the parameters of boron nitride porosity and develop novel structures with high capacitive performance for carbon capture. The synthesized BN-P123 possesses high specific surface area and pore volume compared to pristine BN, which results in an enhanced CO2 adsorption capacity
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
